Gamma-ray Burst 170705A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:46:03 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.705d {+12h 46m 49s} (J2000),
                 191.923d {+12h 47m 41s} (current),
                 191.083d {+12h 44m 20s} (1950)
GRB_DEC:         +18.293d {+18d 17' 35"} (J2000),
                 +18.198d {+18d 11' 51"} (current),
                 +18.566d {+18d 33' 57"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3349 [cnts]    Image_Peak=200 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       19776 [cnts]
BKG_TIME:        9932.68 SOD {02:45:32.68} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9947.08 SOD {02:45:47.08} UT
GRB_PHI:         -153.26 [deg]
GRB_THETA:        27.65 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.23 [sigma]
IMAGE_SIGNIF:    8.55 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -1  +0  +0 -16  +0 
SUN_POSTN:       104.44d {+06h 57m 45s}  +22.77d {+22d 46' 21"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.78d {+15h 51m 06s}  -14.88d {-14d 52' 49"}
MOON_DIST:        55.99 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.83, 81.10 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      183.19, 21.38 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 212.96,4.35 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(4.0<100sec) coincident with the FERMI_GBM event (trignum=520915556).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:46:17 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     520915556
GRB_RA:          186.483d {+12h 25m 56s} (J2000),
                 186.705d {+12h 26m 49s} (current),
                 185.850d {+12h 23m 24s} (1950)
GRB_DEC:         +12.900d {+12d 54' 00"} (J2000),
                 +12.803d {+12d 48' 11"} (current),
                 +13.177d {+13d 10' 36"} (1950)
GRB_ERROR:       19.67 [deg radius, statistical plus systematic]
GRB_INTEN:       90 [cnts/sec]
DATA_SIGNIF:     7.70 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         197.00 [deg]
GRB_THETA:       120.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      2.81
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      62%  GRB
2nd_MOST_LIKELY:  26%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 0,0,1, 0,0,1, 0,0,
SUN_POSTN:       104.44d {+06h 57m 45s}  +22.77d {+22d 46' 21"}
SUN_DIST:         78.07 [deg]   Sun_angle= -5.5 [hr] (East of Sun)
MOON_POSTN:      237.78d {+15h 51m 07s}  -14.88d {-14d 52' 51"}
MOON_DIST:        57.64 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      278.92, 74.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      180.72, 14.40 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 324.07,19.33 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=760064).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:46:33 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      68
TRIGGER_NUM:     520915556
GRB_RA:          194.533d {+12h 58m 08s} (J2000),
                 194.750d {+12h 59m 00s} (current),
                 193.914d {+12h 55m 39s} (1950)
GRB_DEC:         +16.917d {+16d 55' 00"} (J2000),
                 +16.822d {+16d 49' 21"} (current),
                 +17.187d {+17d 11' 12"} (1950)
GRB_ERROR:       4.52 [deg radius, statistical plus systematic]
GRB_INTEN:       795 [cnts/sec]
DATA_SIGNIF:     58.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         188.00 [deg]
GRB_THETA:       115.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.06
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   1%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,1, 0,0,1, 0,0,
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         83.84 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
MOON_POSTN:      237.78d {+15h 51m 07s}  -14.88d {-14d 52' 53"}
MOON_DIST:        52.99 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      311.90, 79.67 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      186.44, 21.25 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 324.07,19.33 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=760064).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:46:25 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      57
TRIGGER_NUM:     520915556
GRB_RA:          188.300d {+12h 33m 12s} (J2000),
                 188.520d {+12h 34m 05s} (current),
                 187.671d {+12h 30m 41s} (1950)
GRB_DEC:         +16.117d {+16d 07' 00"} (J2000),
                 +16.020d {+16d 01' 13"} (current),
                 +16.392d {+16d 23' 33"} (1950)
GRB_ERROR:       5.67 [deg radius, statistical plus systematic]
GRB_INTEN:       516 [cnts/sec]
DATA_SIGNIF:     18.70 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         192.00 [deg]
GRB_THETA:       120.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.98
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   2%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,1, 0,0,1, 0,0,
SUN_POSTN:       104.44d {+06h 57m 45s}  +22.77d {+22d 46' 21"}
SUN_DIST:         78.57 [deg]   Sun_angle= -5.6 [hr] (East of Sun)
MOON_POSTN:      237.78d {+15h 51m 07s}  -14.88d {-14d 52' 52"}
MOON_DIST:        57.63 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      281.00, 78.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.01, 18.05 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 324.07,19.33 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=760064).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:21 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      1
TRIGGER_NUM:     520915556
GRB_RA:          186.470d {+12h 25m 53s} (J2000),
                 186.690d {+12h 26m 46s} (current),
                 185.841d {+12h 23m 22s} (1950)
GRB_DEC:         +20.220d {+20d 13' 12"} (J2000),
                 +20.123d {+20d 07' 23"} (current),
                 +20.497d {+20d 29' 48"} (1950)
GRB_ERROR:       1.84 [deg radius, statistical only]
DATA_SIGNIF:     38.60 [sigma]
DATA_INTERVAL:   8.192 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         189.00 [deg]
GRB_THETA:       123.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         75.53 [deg]   Sun_angle= -5.5 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 09s}  -14.88d {-14d 52' 58"}
MOON_DIST:        61.22 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      261.33, 80.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      177.51, 21.05 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_520915556.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(5.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=7876).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:27 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     520915556
GRB_RA:          187.460d {+12h 29m 50s} (J2000),
                 187.680d {+12h 30m 43s} (current),
                 186.832d {+12h 27m 20s} (1950)
GRB_DEC:         +19.800d {+19d 48' 00"} (J2000),
                 +19.703d {+19d 42' 12"} (current),
                 +20.076d {+20d 04' 34"} (1950)
GRB_ERROR:       1.08 [deg radius, statistical only]
DATA_SIGNIF:     56.80 [sigma]
DATA_INTERVAL:   9.216 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         189.00 [deg]
GRB_THETA:       122.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         76.54 [deg]   Sun_angle= -5.5 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 09s}  -14.88d {-14d 52' 58"}
MOON_DIST:        60.20 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      267.76, 81.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      178.61, 21.06 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_520915556.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(5.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=7876).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:46:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     520915556
GRB_RA:          184.410d {+12h 17m 38s} (J2000),
                 184.632d {+12h 18m 32s} (current),
                 183.775d {+12h 15m 06s} (1950)
GRB_DEC:         +15.510d {+15d 30' 36"} (J2000),
                 +15.413d {+15d 24' 46"} (current),
                 +15.788d {+15d 47' 16"} (1950)
GRB_ERROR:       6.25 [deg radius, statistical only]
DATA_SIGNIF:     10.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         195.00 [deg]
GRB_THETA:       123.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         75.27 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      237.78d {+15h 51m 07s}  -14.88d {-14d 52' 52"}
MOON_DIST:        60.62 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      267.17, 75.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      177.71, 15.95 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_520915556.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=760064).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      0
TRIGGER_NUM:     520915556
GRB_RA:          186.140d {+12h 24m 34s} (J2000),
                 186.361d {+12h 25m 27s} (current),
                 185.510d {+12h 22m 02s} (1950)
GRB_DEC:         +19.500d {+19d 30' 00"} (J2000),
                 +19.403d {+19d 24' 11"} (current),
                 +19.777d {+19d 46' 37"} (1950)
GRB_ERROR:       2.99 [deg radius, statistical only]
DATA_SIGNIF:     27.00 [sigma]
DATA_INTERVAL:   7.168 [sec]
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9951.03 SOD {02:45:51.03} UT
GRB_PHI:         190.00 [deg]
GRB_THETA:       123.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         75.47 [deg]   Sun_angle= -5.5 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 09s}  -14.88d {-14d 52' 57"}
MOON_DIST:        61.12 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      262.57, 80.19 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      177.54, 20.27 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170705115/quicklook/glg_lc_medres34_bn170705115.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_520915556.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(5.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=7876).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Wed 05 Jul 17 02:46:47 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    7876,   Sub_Num: 0
GRB_INTEN:      9.12 [sigma]   
GRB_TIME:       9956.78 SOD {02:45:56.78} UT
GRB_DATE:       17939 TJD;   186 DOY;   17/07/05
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(5.0<100sec) coincident with the FERMI_GBM event (trignum=520915556).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2017-07/2017-07-05T02-45-56.6009-27650-23440-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:26 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7054d {+12h 46m 49.29s} (J2000),
                 191.9231d {+12h 47m 41.55s} (current),
                 191.0832d {+12h 44m 19.97s} (1950)
GRB_DEC:         +18.3086d {+18d 18' 30.9"} (J2000),
                 +18.2132d {+18d 12' 47.5"} (current),
                 +18.5815d {+18d 34' 53.4"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.57e-09 [erg/cm2/sec]
GRB_SIGNIF:      7.74 [sigma]
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10019.37 SOD {02:46:59.37} UT,   72.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.17 261.68 243.61
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 09s}  -14.88d {-14d 52' 58"}
MOON_DIST:        56.01 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.82, 81.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.93 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:40 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7054d {+12h 46m 49.2s} (J2000),
                 191.9231d {+12h 47m 41.5s} (current),
                 191.0832d {+12h 44m 19.9s} (1950)
GRB_DEC:         +18.3086d {+18d 18' 30.9"} (J2000),
                 +18.2132d {+18d 12' 47.5"} (current),
                 +18.5815d {+18d 34' 53.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       60 [cnts]
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10019.37 SOD {02:46:59.37} UT,   72.3 [sec] since BAT Trigger Time
CENTROID_X:      296.42,  raw= 296  [pixels]
CENTROID_Y:      293.82,  raw= 294  [pixels]
ROLL:            291.02 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -10.77
GRB_POS_XRT_Z:   -23.50
IMAGE_URL:       sw00760064000msxps_rw.img
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 10s}  -14.88d {-14d 53' 00"}
MOON_DIST:        56.02 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.82, 81.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:47:36 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7054d {+12h 46m 49.2s} (J2000),
                 191.9231d {+12h 47m 41.5s} (current),
                 191.0832d {+12h 44m 19.9s} (1950)
GRB_DEC:         +18.3086d {+18d 18' 30.9"} (J2000),
                 +18.2132d {+18d 12' 47.5"} (current),
                 +18.5815d {+18d 34' 53.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       60 [cnts]
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10019.37 SOD {02:46:59.37} UT,   72.3 [sec] since BAT Trigger Time
CENTROID_X:      296.42,  raw= 296  [pixels]
CENTROID_Y:      293.82,  raw= 294  [pixels]
ROLL:            291.02 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -10.77
GRB_POS_XRT_Z:   -23.50
IMAGE_URL:       sw00760064000msxps_rw.img
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.79d {+15h 51m 09s}  -14.88d {-14d 53' 00"}
MOON_DIST:        56.01 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.82, 81.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:49:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.705d {+12h 46m 49s} (J2000),
                 191.923d {+12h 47m 41s} (current),
                 191.083d {+12h 44m 20s} (1950)
GRB_DEC:         +18.293d {+18d 17' 35"} (J2000),
                 +18.198d {+18d 11' 51"} (current),
                 +18.566d {+18d 33' 57"} (1950)
GRB_DATE:        17939 TJD;   186 DOY;   17/07/05
GRB_TIME:        9947.08 SOD {02:45:47.08} UT
TRIGGER_INDEX:   137
GRB_PHI:         -153.26 [deg]
GRB_THETA:        27.65 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.23 [sigma]
IMAGE_SIGNIF:    8.55 [sigma]
LC_URL:          sw00760064000msb.lc
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 21"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.80d {+15h 51m 13s}  -14.89d {-14d 53' 10"}
MOON_DIST:        56.02 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.83, 81.10 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      183.19, 21.38 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 212.96,4.35 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:49:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.709d {+12h 46m 50s} (J2000)
POINT_DEC:       +18.303d {+18d 18' 10"} (J2000)
POINT_ROLL:      291.019d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10028.61 SOD {02:47:08.61} UT,   81.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.487
N_STARS:         24
X_OFFSET:        448 [pixels]
Y_OFFSET:        464 [pixels]
X_MAX:           1407 [pixels]
Y_MAX:           1423 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00760064000msufc0081.fits
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 20"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.81d {+15h 51m 14s}  -14.89d {-14d 53' 14"}
MOON_DIST:        56.03 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.85, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.19, 21.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:50:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.709d {+12h 46m 50s} (J2000)
POINT_DEC:       +18.303d {+18d 18' 10"} (J2000)
POINT_ROLL:      291.019d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10028.61 SOD {02:47:08.61} UT,   81.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.487
N_STARS:         24
X_OFFSET:        448 [pixels]
Y_OFFSET:        464 [pixels]
X_MAX:           1407 [pixels]
Y_MAX:           1423 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00760064000msufc0081.fits
SUN_POSTN:       104.44d {+06h 57m 46s}  +22.77d {+22d 46' 20"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.81d {+15h 51m 14s}  -14.89d {-14d 53' 15"}
MOON_DIST:        56.03 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.85, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.19, 21.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:52:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.709d {+12h 46m 50s} (J2000)
POINT_DEC:       +18.303d {+18d 18' 10"} (J2000)
ROLL:            291.019d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10028.61 SOD {02:47:08.61} UT,   81.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     520915647
X_OFFSET:        849 [pixels]
Y_OFFSET:        855 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       1015
BINNING_INDEX:   1
IM_URL:          sw00760064000msuni0101.fits
SUN_POSTN:       104.44d {+06h 57m 47s}  +22.77d {+22d 46' 20"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.83d {+15h 51m 19s}  -14.89d {-14d 53' 30"}
MOON_DIST:        56.04 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.85, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.19, 21.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 02:52:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.709d {+12h 46m 50s} (J2000)
POINT_DEC:       +18.303d {+18d 18' 10"} (J2000)
ROLL:            291.019d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10028.61 SOD {02:47:08.61} UT,   81.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     520915647
X_OFFSET:        849 [pixels]
Y_OFFSET:        855 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       1015
BINNING_INDEX:   1
IM_URL:          sw00760064000msuni0101.fits
SUN_POSTN:       104.44d {+06h 57m 47s}  +22.77d {+22d 46' 20"}
SUN_DIST:         80.83 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      237.83d {+15h 51m 19s}  -14.89d {-14d 53' 32"}
MOON_DIST:        56.05 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.85, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.19, 21.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #21289
R. L. C. Starling (U Leicester), A. Cholden-Brown (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift Team:
At 02:45:47 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 170705A (trigger=760064). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 191.705, +18.293 which is
```
   RA(J2000) = 12h 46m 49s
   Dec(J2000) = +18d 17' 35"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 40 sec. The peak count rate was ~17000 counts/sec (15-350 keV), at ~13 sec after the trigger.
The XRT began observing the field at 02:46:59.3 UT, 72.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 191.70472, 18.30811 which is equivalent to:
```
   RA(J2000)  = 12h 46m 49.13s
   Dec(J2000) = +18d 18' 29.2"
```
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 54 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.46 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 4.6 (+3.03/-2.52) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.57e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 81 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	12:46:48.97 = 191.70406
  DEC(J2000) = +18:18:26.2  =  18.30727
```
with a 90%-confidence error radius of about 0.76 arc sec. This position is 3.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.65 with a 1-sigma error of about 0.15. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is R. L. C. Starling (rlcs1 AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:12:33 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7047d {+12h 46m 49.12s} (J2000),
                 191.9224d {+12h 47m 41.38s} (current),
                 191.0825d {+12h 44m 19.80s} (1950)
GRB_DEC:         +18.3081d {+18d 18' 29.1"} (J2000),
                 +18.2127d {+18d 12' 45.7"} (current),
                 +18.5810d {+18d 34' 51.6"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10452.00 SOD {02:54:12.00} UT,   504.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       104.46d {+06h 57m 50s}  +22.77d {+22d 46' 15"}
SUN_DIST:         80.81 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.00d {+15h 51m 59s}  -14.93d {-14d 55' 40"}
MOON_DIST:        56.21 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.82, 81.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:19:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.713d {+12h 46m 51s} (J2000)
POINT_DEC:       +18.305d {+18d 18' 17"} (J2000)
POINT_ROLL:      291.021d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10817.20 SOD {03:00:17.20} UT,   870.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.491
N_STARS:         61
X_OFFSET:        289 [pixels]
Y_OFFSET:        295 [pixels]
X_MAX:           1728 [pixels]
Y_MAX:           1734 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00760064000msufc0870.fits
SUN_POSTN:       104.46d {+06h 57m 51s}  +22.77d {+22d 46' 13"}
SUN_DIST:         80.81 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.06d {+15h 52m 14s}  -14.94d {-14d 56' 28"}
MOON_DIST:        56.25 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.87, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.20, 21.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:20:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.713d {+12h 46m 51s} (J2000)
POINT_DEC:       +18.305d {+18d 18' 17"} (J2000)
POINT_ROLL:      291.021d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10817.20 SOD {03:00:17.20} UT,   870.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.491
N_STARS:         61
X_OFFSET:        289 [pixels]
Y_OFFSET:        295 [pixels]
X_MAX:           1728 [pixels]
Y_MAX:           1734 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00760064000msufc0870.fits
SUN_POSTN:       104.46d {+06h 57m 51s}  +22.77d {+22d 46' 13"}
SUN_DIST:         80.81 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.06d {+15h 52m 14s}  -14.94d {-14d 56' 29"}
MOON_DIST:        56.25 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.87, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.20, 21.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:20:38 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7041d {+12h 46m 48.98s} (J2000),
                 191.9218d {+12h 47m 41.24s} (current),
                 191.0819d {+12h 44m 19.66s} (1950)
GRB_DEC:         +18.3074d {+18d 18' 26.6"} (J2000),
                 +18.2120d {+18d 12' 43.1"} (current),
                 +18.5803d {+18d 34' 49.1"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10452.00 SOD {02:54:12.00} UT,   504.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       104.46d {+06h 57m 51s}  +22.77d {+22d 46' 13"}
SUN_DIST:         80.80 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.06d {+15h 52m 15s}  -14.94d {-14d 56' 33"}
MOON_DIST:        56.27 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.81, 81.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:21:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.713d {+12h 46m 51s} (J2000)
POINT_DEC:       +18.305d {+18d 18' 17"} (J2000)
ROLL:            291.021d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10817.20 SOD {03:00:17.20} UT,   870.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     520916436
X_OFFSET:        848 [pixels]
Y_OFFSET:        854 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       1014
BINNING_INDEX:   1
IM_URL:          sw00760064000msuni0890.fits
SUN_POSTN:       104.46d {+06h 57m 51s}  +22.77d {+22d 46' 13"}
SUN_DIST:         80.81 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.07d {+15h 52m 17s}  -14.94d {-14d 56' 37"}
MOON_DIST:        56.26 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.87, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.20, 21.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:21:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     760064,   Seg_Num: 0
POINT_RA:        191.713d {+12h 46m 51s} (J2000)
POINT_DEC:       +18.305d {+18d 18' 17"} (J2000)
ROLL:            291.021d
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10817.20 SOD {03:00:17.20} UT,   870.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     520916436
X_OFFSET:        848 [pixels]
Y_OFFSET:        854 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       1014
BINNING_INDEX:   1
IM_URL:          sw00760064000msuni0890.fits
SUN_POSTN:       104.46d {+06h 57m 52s}  +22.77d {+22d 46' 13"}
SUN_DIST:         80.81 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.07d {+15h 52m 17s}  -14.94d {-14d 56' 39"}
MOON_DIST:        56.27 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.87, 81.11 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      183.20, 21.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Jul 17 03:25:16 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     760064,   Seg_Num: 0
GRB_RA:          191.7040d {+12h 46m 48.96s} (J2000),
                 191.9217d {+12h 47m 41.21s} (current),
                 191.0818d {+12h 44m 19.63s} (1950)
GRB_DEC:         +18.3072d {+18d 18' 25.9"} (J2000),
                 +18.2118d {+18d 12' 42.4"} (current),
                 +18.5801d {+18d 34' 48.4"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         18.64 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  17939 TJD;   186 DOY;   17/07/05
IMG_START_TIME:  10025.00 SOD {02:47:05.00} UT,   77.9 [sec] since BAT Trigger Time
SUN_POSTN:       104.47d {+06h 57m 52s}  +22.77d {+22d 46' 12"}
SUN_DIST:         80.80 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      238.10d {+15h 52m 24s}  -14.95d {-14d 57' 02"}
MOON_DIST:        56.30 [deg]
MOON_ILLUM:      86 [%]
GAL_COORDS:      295.81, 81.11 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      183.19, 21.40 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 6.5 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #21290
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 569 s of XRT Photon Counting mode data and 1 UVOT images for GRB 170705A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 191.70427, +18.30741 which is equivalent to:
```
RA (J2000): 12h 46m 49.02s
Dec (J2000): +18d 18' 26.7"
```
with an uncertainty of 1.8 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #21291
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, D.Kuvshinov, A.V.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU
R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA), National University of San Juan, Argentina
H. Levato, C. Saffe Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE), San Juan, Argentina
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk, O. Ershova Irkutsk State University
V.Yurkov, Yu.Sergienko Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in OAFA was pointed to the GRB170705A (Starling et al.,GCN #21289) 24 sec after notice time and 38 sec after trigger time at 2017-07-05 02:46:27 UT at high zenit distance. On our first (10s exposure) unfiltered exposition we haven`t found optical transient within SWIFT error-box (ra=191.704 dec=18.2928 r=0.05) brighter than 15.0.
We marginally found OT at Swift UVOT position (Starling et al.,GCN #21289) on coaded image ID=79921 with m ~ 17.0.
```
  ID       DATE      UT     Exp      Type         Limit        Note

79817 2017-07-05 02:46:27  10    Alert (SWIFT)   15.0          no
79921 2017-07-05 02:46:27 190 SumAlert (SWIFT)   16.9 79817+79825+79820+79818 
79818 2017-07-05 02:47:20  20    Alert (SWIFT)   15.8         yes
79819 2017-07-05 02:48:24  30    Alert (SWIFT)   15.9          no
79820 2017-07-05 02:49:38  50    Alert (SWIFT)   16.2         yes
79822 2017-07-05 02:51:13  60    Alert (SWIFT)   16.3          no
79824 2017-07-05 02:52:57  90    Alert (SWIFT)   16.5          no
79825 2017-07-05 02:55:11 110    Alert (SWIFT)   16.4         yes
79826 2017-07-05 02:57:46 140    Alert (SWIFT)   16.4          no
79827 2017-07-05 03:00:48 180    Alert (SWIFT)   16.7          no
79829 2017-07-05 03:04:32 180    Alert (SWIFT)   16.3          no 
79830 2017-07-05 03:08:12 180    Alert (SWIFT)   16.0          no
```
The unfiltered magnitude is about ~17 m . The big differences with UVOT magnitude may be connected with high GRB redshift because our CCD is more red.
The observations made on zenit distance = 79 degrees, galaxy latitude b = 81 degree. The moon (86 % bright part) is 66 degrees above the horizon. The distance between moon and object is 56 The sun altitude is -63.1 degree. The object can be observed till 2017-07-05 03:46:20 .
The message may be cited.
GCN Circular #21292
S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), S. J. LaPorte (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU) and R.L.C. Starling report on behalf of the Swift-XRT team:
We have analysed 8.4 ks of XRT data for GRB 170705A (Starling et al. GCN Circ. 21289), from 62 s to 22.1 ks after the BAT trigger. The data comprise 424 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 21290).
The late-time light curve (from T0+4.6 ks) can be modelled with a power-law decay with a decay index of alpha=0.83 (+/-0.09).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.53 (+/-0.03). The best-fitting absorption column is 8.4 (+1.1, -1.0) x 10^20 cm^-2, in excess of the Galactic value of 1.5 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.87 (+0.09, -0.08) and a best-fitting absorption column of 1.29 (+0.26, -0.24) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.5 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.29 (+0.26, -0.24) x 10^21 cm^-2
Galactic foreground: 1.5 x 10^20 cm^-2
Excess significance: 7.7 sigma
Photon index:	     1.87 (+0.09, -0.08)
```
If the light curve continues to decay with a power-law decay index of 0.83, the count rate at T+24 hours will be 0.11 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.0 x 10^-12 (5.0 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00760064.
This circular is an official product of the Swift-XRT team.
GCN Circular #21293
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 170705A (Starling, et al., GCN 21289) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2017/07 5.17 to 2017/07 5.26 UTC (1.34 to 3.41 hours after the BAT trigger), obtaining a total of 1.42 hours exposure in the r and i bands and 0.59 hours exposure in the Z, Y, J, and H bands.
We detect the optical transient found by Swift and observed MASTER-OAFA (Lipunov, et al., GCN 21291). In comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following detections:
```
 r =3D 18.60 +/- 0.01
 i =3D 18.30 +/- 0.01
 Z =3D 18.03 +/- 0.01
 Y =3D 17.79 +/- 0.01
 J =3D 17.79 +/- 0.01
 H =3D 17.56 +/- 0.01
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. The source fades as in time as t^(-0.4) during our observation.
We note that the Swift-UVOT detection makes this GRB unlikely to be at very high redshift. Our photo-z calculations, using RATIR data alone, suggest z<4.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #21294
S.W.K. Emery (UCL-MSSL) and R. L. C. Starling (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 170705A 82 s after the BAT trigger (Starling et al., GCN Circ. 21289). We detect a fading source consistent with the XRT position (Goad et al., GCN Circ. 21290) and the MASTER (Lipunov et al., GCN Circ. 21291) and RATIR (Butler et al., GCN Circ. 21293) detections in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  12:46:48.97 = 191.70404 (deg.)
    Dec (J2000) = +18:18:26.4  =  18.30733 (deg.)
```
with an estimated uncertainty of 0.45 arc sec. (radius, 90% confidence).
Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag
white_FC            82          231          147         18.55 +/- 0.06
white              573         1020          186         19.23 +/- 0.11
u                  294          543          246         19.43 +/- 0.19
v                  623         1070           58        >18.3
b                  549          741           39         18.92 +/- 0.26
uvw1               672          692           19        >18.1
uvm2              4617        12950          996        >20.7
uvw2              5644        11420         1137        >21.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #21295
S. Harita, Y. Saito, R. Itoh, Y. Tachibana, T. Yoshii, K. Morita, T. Ozawa, H. Mamiya, K. Shiraishi, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 170705A (R. L. C. Starling et al., GCN Circular #21289) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50cm telescope of Akeno Observatory, Yamanashi, Japan.
The observation started on 2017-07-05 11:21:20.84 UT. We did not find any new point source within XRT circle in all three bands. We obtained following limits for the magnitudes.
```
T0+[hour]    MID-UT      T-EXP[sec]         g'              Rc                    Ic
-------------------------------------------------------------------------------------------------------
~8.59       12:29:51            1320          >18.5        >17.9                >17.8
-------------------------------------------------------------------------------------------------------

T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
```
We used GSC2.3 catalog for flux calibration.
GCN Circular #21296
H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), R. L. C. Starling (U Leicester), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 170705A (trigger #760064) (Starling et al., GCN Circ. 21289). The BAT ground-calculated position is RA, Dec = 191.708, 18.298 deg which is
```
  RA(J2000)  =  12h 46m 50.0s 
  Dec(J2000) = +18d 17' 51.3" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 83%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~ T0 and ends at ~ T+300 s. The main emission occurs at ~ T0 to ~ T+40 s, with the major peak at ~ T+14 s. T90 (15-350 keV) is 217.3 +- 18.0 sec (estimated error including systematics).
The time-averaged spectrum from T+0.44 to T+304.86 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.65 +- 0.05. The fluence in the 15-150 keV band is 9.5 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+13.41 sec in the 15-150 keV band is 13.9 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #21297
E. Bissaldi (Politecnico & INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 02:45:51.03 UT on 5 July 2017, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 170705A (trigger 520915556 / 170705115), which was also detected by the Swift/BAT (Starling et al. 2017, GCN 21289). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 118 degrees.
The GBM light curve shows two peaks with a duration (T90) of about 22 s (50-300 keV). The time-averaged spectrum from T0-2 s to T0+20 s is adequately fit by a Band function with Epeak = 100 +/- 10 keV, alpha = -0.88 +/- 0.07, and beta = -2.38 +/- 0.09.
The event fluence (10-1000 keV) in this time interval is (1.37 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+9.4 s in the 10-1000 keV band is 22.5 +/- 0.5 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #21298
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D.A. Kann (IAA-CSIC), L. Izzo (IAA-CSIC), C.C. Thoene (IAA-CSIC) report on behalf of the HETH group:
We observed the afterglow of GRB 170705A (Starling et al. GCN 21289, Lipunov et al. GCN 21291, Butler et al. GCN 21293, Emery et al. GCN 21294) with OSIRIS at the 10.4m GTC telescope. The observation consisted of 3x900s using grism R1000B, covering the range between 3700 and 7880 AA at a mean epoch of July 5.9350 2017 UT (19.68 hr after the burst).
The acquisition shows the afterglow at a magnitude of r(AB) = 20.20 +/- 0.10 mag, as compared to SDSS field stars. The spectrum shows continuum across all the spectral range, although the signal to noise ratio of the bluest part is low because of the bright sky due of the nearby almost full Moon. We detect weak spectral absorption features due to CIV, AlII, AlIII, FeII and FeII* at a common redshift of 2.010, which we identify as the redshift of the GRB.
GCN Circular #21299
D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, A. Tsvetkova, A. Lysenko, A.Kozlova, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 170705A (Swift-BAT observation: Starling et al., GCN Circ. 21289; Fermi-GBM observation: Bissaldi and Meegan, GCN Circ. 21297) triggered Konus-Wind at T0=9956.188 s UT (02:45:56.188).
The burst light curve shows a bright, multipeaked pulse, which starts at ~T0-6 s and has a total duration of ~25 s, followed by a weaker emission seen up to ~T0+300 s. The emission in the main episode is seen up to ~1 MeV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB170705_T09956/
As observed by Konus-Wind, the burst had a fluence of 1.76(-0.19,+0.20)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+2.384 s, of 4.21(-0.94,+0.96)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum of the main episode (measured from T0 to T0+24.832 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.31(-0.17,+0.20) and Ep = 155(-22,+31) keV (chi2 = 53/62 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.7 (chi2 = 59/61 dof).
The spectrum near the maximum count rate (measured from T0+0.256 to T0+8.448 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model: with alpha = -1.16(-0.15,+0.16) and Ep = 166(-18,+23) keV (chi2 = 69/61 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -3 (chi2 = 69/60 dof).
Assuming the redshift z=2.010 (de Ugarte Postigo et al., GCN Circ. 21298) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.27, and Omega_Lambda = 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is ~1.8x10^53 erg, the peak luminosity L_iso is ~1.3x10^53 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is ~466 keV.
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN Circular #21300
E. Mazaeva (IKI), A. Pozanenko (IKI), V. Agletdinov (KIAM), A. Volnova (IKI), A. Mokhnatkin (KIAM), I. Molotov (KIAM) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 170705A (Starling et al. GCN 21289) which is also detected by GBM/Fermi and Konus-Wind (Bissaldi et al., GCN 21297; Svinkini et al., GCN 21299) with K-800 (0.8m) telescope of ISON/Terskol observatory starting on July, 05 (UT) 18:30:54. We obtained several unfiltered images of 20 s exposure. The optical afterglow of GRB 170705A (Starling et al. GCN 21289, Lipunov et al. GCN 21291, Butler et al. GCN 21293, Emery et al. GCN 21294; Ugarte Postigo et al. GCN 21298) is clearly visible in a combined image. Preliminary photometry of the afterglow is following
```
Date       UT start  t-T0                 Filter   Exp.      OT     Err. 
UL
                      (mid, days)                         (s)

2017-07-05  18:30:54 0.70649 CR      358*20 19.84 0.08 22.2
```
Photometry is based on nearby SDSS DR9 stars
```
SDSS id                          R_Lupton
J124702.82+181926.7 17.63
J124700.96+181851.9 19.15
J124653.35+182058.9 17.08
J124641.28+182043.7 16.61
J124646.57+181522.1 17.45
J124645.71+181510.4 17.18
J124650.58+182306.3 18.18
J124624.60+181820.0 16.34
J124647.75+181330.6 16.05
J124644.99+181414.3 18.79 
```
GCN Circular #21301
F. J. Lu, C. K. Li, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, X. B. Li, J. Y. Liao, Y. Huang, Y. H. Wang, Z. Chang, X. F. Lu, J. L. Zhao, A. M. Zhang, Y. F. Zhang, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), Y. P. Chen, M. Gao (IHEP), T. P. Li (IHEP/THU), G. Li, M. S. Li, H. W. Liu, L. M. Song, W. H. Tao, H. Y. Wang, X. Y. Wen, M. Wu, H. Xu, Y. P. Xu, C. M. Zhang, F. Zhang, J. Zhang, T. Zhang, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team:
During the commissioning phase, at 2017-07-05T02:45:59.00 (T0), Insight-HXMT detected GRB 170705A (trigger ID: HEB170705115) in a routine search of the data, which was also observed by the Swift/BAT (Starling et al. 2017, GCN 21289), Fermi/GBM (Bissaldi et al. 2017, GCN 20297) and Konus-Wind (Svinkin et al. 2017, GCN 21299).
The Insight-HXMT light curve consists of single pulse with a duration (T90) of 7.0 s measured from T0-1.30 s. The 1-second peak rate, measured from T0+1 s, is 928.3 cnts/sec. The total counts from this burst is 3458 counts.
All measurements above are made with the CsI detectors in the energy range of about 80-840 keV (record energy) in the regular mode. Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed on the inside of the telescope.
URL_LC: http://www.hxmt.org/images/GRB/HEB170705115_lc.jpg
The time-averaged spectrum from T0-2 s to T0+8 s is adequately fit by a Power Law model with spectral index = -2.16 +/- 0.10. The energy fluence is (1.42 +/- 0.30)E-05 erg/cm^2 in 200 - 5000 keV in this time interval.
The analysis results presented above are preliminary; final results will be published elsewhere.
Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org/index.php/enhome .
GCN Circular #21302
Max Genecov, WeiKang Zheng, and Alex Filippenko (UC Berkeley) report on behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift GRB 170705A (Starling, et al.,GCN 21289), starting 1.66 hours after the burst and again 1.08 days after the burst. Observations were performed in the clear (roughly R) filter, and the exposure time was 60 s per image.
The optical afterglow of GRB 170705A (Starling, et al.,GCN 21289; Lipunov et al., GCN 21291; Butler et al. GCN 21293, Emery et al. GCN 21294, Ugarte Postigo et al. GCN 21298, Pozenenko et al. GCN 21300) was clearly detected in every single image from the first night and in an image co-added from thirteen frames in the second night. Preliminary photometry of the afterglow calibrated to several nearby SDSS stars gives 18.1 +/- 0.2 mag at mean time 1.66 hours and 20.3 +/- 0.3 mag at mean time 1.08 days.
GCN Circular #21303
Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 170705A (Starling et al., GCN Circ. 21289) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2017/07 6.17 to 2017/07 6.26 UTC (25.33 to 27.52 hours after the BAT trigger), obtaining a total of 1.02 hours exposure in the r and i bands and 0.37 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following detections:
```
 r	=3D 20.62 +/- 0.05
 i	=3D 20.35 +/- 0.05
 Z	=3D 19.68 +/- 0.07
 Y	=3D 19.72 +/- 0.09
 J	=3D 19.46 +/- 0.10
 H	=3D 19.61 +/- 0.16
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
The source has faded on average by 1.90 +/- 0.17 magnitudes compared to o= ur previous observations (Butler et al., GCN Circ. 21293). This correspon= ds to a temporal index of -0.72 +/- 0.03, which is steeper than the index=
```
 of -0.4 we saw during our previous observations.
```
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #21320
A. Volnova (IKI), E. Mazaeva (IKI), A. Pozanenko (IKI), A. Kusakin (Fesenkov Astrophysical Institute), I. Reva (Fesenkov Astrophysical Institute) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 170705A (Starling et al. GCN 21289) which is also detected by GBM/Fermi and Konus-Wind (Bissaldi et al., GCN 21297; Svinkin et al., GCN 21299) with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory on July 6-8. We took several images in R-filter. The optical afterglow of GRB 170705A (Starling et al. GCN 21289, Lipunov et al. GCN 21291, Butler et al. GCN 21293, Emery et al. GCN 21294; Ugarte Postigo et al. GCN 21298) is visible in a combined image on July 6, and upper limit only for July 7-8. Preliminary photometry of the afterglow is following.
```
Date       UT start   t-T0    Filter Exp.  OT     Err. UL
                      (mid, days)     (s)             (3 sigma)

2017-07-06 16:28:29  1.61411  R    38*180  20.67  0.24 21.1
2017-07-07 17:30:55  2.63106  R    13*180  n/d    n/d  20.6
2017-07-07 17:30:55  3.10501  R    34*180  n/d    n/d  21.1
```
Photometry is based on nearby SDSS DR9 stars listed in GCN 21300.
GCN Circular #21327
V. Sharma (IUCAA), V. Bhalerao (IIT-B), D. Bhattacharya (IUCAA), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the Astrosat CZTI collaboration:
Analysis of Astrosat CZTI data showed the detection of a long-duration GRB 170705A, which was also detected by Swift/BAT (Starling et al., GCN 21289), Fermi/GBM (Bissaldi et al., GCN 21297), Konus-Wind (Svinkin et al., GCN 21299) and Insight-HXMT (Lu et al., GCN 21301).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 02:46:00 UT, ~13 s after the Swift Trigger. The measured peak count rate is 635.9 cts/s above the background in combined data of four quadrants, with a total of 3123 cts. The local mean background count rate was 374.1 cts/s. Using cumulative rates, we measure a T90 of 14.9 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.

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Jochen Greiner, last update: 12-Jul-2017 [Disclaimer]