Gamma-ray Burst 150711A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:26:14 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.631d {+14h 46m 31s} (J2000),
                 221.871d {+14h 47m 29s} (current),
                 220.860d {+14h 43m 26s} (1950)
GRB_DEC:         -35.471d {-35d 28' 15"} (J2000),
                 -35.536d {-35d 32' 07"} (current),
                 -35.262d {-35d 15' 41"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4520 [cnts]    Image_Peak=167 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       29409 [cnts]
BKG_TIME:        66169.16 SOD {18:22:49.16} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66183.68 SOD {18:23:03.68} UT
GRB_PHI:         -161.30 [deg]
GRB_THETA:        46.89 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     11.57 [sigma]
IMAGE_SIGNIF:    7.97 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 +48  +0 
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 12"}
SUN_DIST:        119.37 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.28d {+03h 41m 06s}  +15.47d {+15d 28' 19"}
MOON_DIST:       156.63 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      230.07,-18.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 = 11.63,-2.10 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=458331784).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:23:24 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     458331784
GRB_RA:          224.850d {+14h 59m 24s} (J2000),
                 225.097d {+15h 00m 23s} (current),
                 224.055d {+14h 56m 13s} (1950)
GRB_DEC:         -38.450d {-38d 27' 00"} (J2000),
                 -38.511d {-38d 30' 39"} (current),
                 -38.251d {-38d 15' 04"} (1950)
GRB_ERROR:       26.92 [deg radius, statistical plus systematic]
GRB_INTEN:       56 [cnts/sec]
DATA_SIGNIF:     5.80 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         184.00 [deg]
GRB_THETA:        35.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.54
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      74%  GRB
2nd_MOST_LIKELY:  12%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 1,1,0, 0,0,0, 0,0,
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        122.23 [deg]   Sun_angle= -7.6 [hr] (East of Sun)
MOON_POSTN:       55.25d {+03h 41m 00s}  +15.47d {+15d 28' 02"}
MOON_DIST:       155.29 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      328.78, 17.91 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      233.64,-20.54 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 319.22,15.75 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:23:34 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      57
TRIGGER_NUM:     458331784
GRB_RA:          225.000d {+15h 00m 00s} (J2000),
                 225.247d {+15h 00m 59s} (current),
                 224.205d {+14h 56m 49s} (1950)
GRB_DEC:         -38.350d {-38d 21' 00"} (J2000),
                 -38.411d {-38d 24' 39"} (current),
                 -38.152d {-38d 09' 05"} (1950)
GRB_ERROR:       11.62 [deg radius, statistical plus systematic]
GRB_INTEN:       129 [cnts/sec]
DATA_SIGNIF:     13.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         184.00 [deg]
GRB_THETA:        35.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.43
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 1,1,0, 0,0,0, 0,0,
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        122.34 [deg]   Sun_angle= -7.6 [hr] (East of Sun)
MOON_POSTN:       55.25d {+03h 41m 00s}  +15.47d {+15d 28' 03"}
MOON_DIST:       155.42 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      328.94, 17.94 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      233.72,-20.41 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 319.22,15.75 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:23:54 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     458331784
GRB_RA:          216.130d {+14h 24m 31s} (J2000),
                 216.364d {+14h 25m 27s} (current),
                 215.379d {+14h 21m 31s} (1950)
GRB_DEC:         -34.390d {-34d 23' 23"} (J2000),
                 -34.460d {-34d 27' 34"} (current),
                 -34.164d {-34d 09' 50"} (1950)
GRB_ERROR:       7.26 [deg radius, statistical only]
DATA_SIGNIF:     11.80 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         192.00 [deg]
GRB_THETA:        28.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        114.75 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       55.25d {+03h 41m 01s}  +15.47d {+15d 28' 05"}
MOON_DIST:       154.52 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      323.95, 24.65 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      225.20,-18.95 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
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.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:24:35 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      0
TRIGGER_NUM:     458331784
GRB_RA:          227.230d {+15h 08m 55s} (J2000),
                 227.475d {+15h 09m 54s} (current),
                 226.443d {+15h 05m 46s} (1950)
GRB_DEC:         -35.990d {-35d 59' 23"} (J2000),
                 -36.049d {-36d 02' 54"} (current),
                 -35.800d {-35d 47' 57"} (1950)
GRB_ERROR:       6.84 [deg radius, statistical only]
DATA_SIGNIF:     15.30 [sigma]
DATA_INTERVAL:   8.192 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         188.00 [deg]
GRB_THETA:        37.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        123.95 [deg]   Sun_angle= -7.8 [hr] (East of Sun)
MOON_POSTN:       55.26d {+03h 41m 03s}  +15.47d {+15d 28' 09"}
MOON_DIST:       158.28 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      331.83, 19.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      234.79,-17.63 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
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.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:24:57 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      1
TRIGGER_NUM:     458331784
GRB_RA:          226.190d {+15h 04m 46s} (J2000),
                 226.439d {+15h 05m 45s} (current),
                 225.392d {+15h 01m 34s} (1950)
GRB_DEC:         -38.400d {-38d 23' 59"} (J2000),
                 -38.460d {-38d 27' 34"} (current),
                 -38.206d {-38d 12' 20"} (1950)
GRB_ERROR:       5.03 [deg radius, statistical only]
DATA_SIGNIF:     19.50 [sigma]
DATA_INTERVAL:   10.240 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         184.00 [deg]
GRB_THETA:        36.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        123.27 [deg]   Sun_angle= -7.7 [hr] (East of Sun)
MOON_POSTN:       55.26d {+03h 41m 03s}  +15.47d {+15d 28' 11"}
MOON_DIST:       155.73 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      329.76, 17.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      234.69,-20.18 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
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.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:25:18 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     458331784
GRB_RA:          221.200d {+14h 44m 48s} (J2000),
                 221.442d {+14h 45m 46s} (current),
                 220.422d {+14h 41m 41s} (1950)
GRB_DEC:         -37.260d {-37d 15' 35"} (J2000),
                 -37.325d {-37d 19' 29"} (current),
                 -37.049d {-37d 02' 56"} (1950)
GRB_ERROR:       4.85 [deg radius, statistical only]
DATA_SIGNIF:     20.30 [sigma]
DATA_INTERVAL:   15.360 [sec]
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66180.16 SOD {18:23:00.16} UT
GRB_PHI:         186.00 [deg]
GRB_THETA:        32.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       110.72d {+07h 22m 53s}  +22.07d {+22d 04' 13"}
SUN_DIST:        119.25 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.27d {+03h 41m 04s}  +15.47d {+15d 28' 13"}
MOON_DIST:       154.95 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      326.69, 20.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      230.32,-20.30 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2015/bn150711766/quicklook/glg_lc_medres34_bn150711766.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
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.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:27:06 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.6269d {+14h 46m 30.45s} (J2000),
                 221.8668d {+14h 47m 28.04s} (current),
                 220.8562d {+14h 43m 25.48s} (1950)
GRB_DEC:         -35.4554d {-35d 27' 19.4"} (J2000),
                 -35.5199d {-35d 31' 11.5"} (current),
                 -35.2461d {-35d 14' 45.7"} (1950)
GRB_ERROR:       5.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.13e-09 [erg/cm2/sec]
GRB_SIGNIF:      6.85 [sigma]
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66290.44 SOD {18:24:50.44} UT,   106.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.69 237.21 261.61 243.71
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 12"}
SUN_DIST:        119.36 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.28d {+03h 41m 08s}  +15.47d {+15d 28' 24"}
MOON_DIST:       156.64 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.78 [deg] galactic lon,lat of the burst
ECL_COORDS:      230.06,-18.48 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.95 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:27:23 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.6269d {+14h 46m 30.4s} (J2000),
                 221.8668d {+14h 47m 28.0s} (current),
                 220.8562d {+14h 43m 25.4s} (1950)
GRB_DEC:         -35.4554d {-35d 27' 19.4"} (J2000),
                 -35.5199d {-35d 31' 11.5"} (current),
                 -35.2461d {-35d 14' 45.7"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       47 [cnts]
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66290.44 SOD {18:24:50.44} UT,   106.8 [sec] since BAT Trigger Time
CENTROID_X:      320.94,  raw= 321  [pixels]
CENTROID_Y:      288.56,  raw= 289  [pixels]
ROLL:            277.52 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -21.76
GRB_POS_XRT_Z:   36.88
IMAGE_URL:       sw00648601000msxps_rw.img
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 12"}
SUN_DIST:        119.36 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.29d {+03h 41m 09s}  +15.47d {+15d 28' 26"}
MOON_DIST:       156.63 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.78 [deg] galactic lon,lat of the burst
ECL_COORDS:      230.06,-18.48 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:27:17 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.6269d {+14h 46m 30.4s} (J2000),
                 221.8668d {+14h 47m 28.0s} (current),
                 220.8562d {+14h 43m 25.4s} (1950)
GRB_DEC:         -35.4554d {-35d 27' 19.4"} (J2000),
                 -35.5199d {-35d 31' 11.5"} (current),
                 -35.2461d {-35d 14' 45.7"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       47 [cnts]
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66290.44 SOD {18:24:50.44} UT,   106.8 [sec] since BAT Trigger Time
CENTROID_X:      320.94,  raw= 321  [pixels]
CENTROID_Y:      288.56,  raw= 289  [pixels]
ROLL:            277.52 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -21.76
GRB_POS_XRT_Z:   36.88
IMAGE_URL:       sw00648601000msxps_rw.img
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 12"}
SUN_DIST:        119.36 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.29d {+03h 41m 09s}  +15.47d {+15d 28' 25"}
MOON_DIST:       156.64 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.78 [deg] galactic lon,lat of the burst
ECL_COORDS:      230.06,-18.48 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:28:08 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.631d {+14h 46m 31s} (J2000),
                 221.871d {+14h 47m 29s} (current),
                 220.860d {+14h 43m 26s} (1950)
GRB_DEC:         -35.471d {-35d 28' 15"} (J2000),
                 -35.536d {-35d 32' 07"} (current),
                 -35.262d {-35d 15' 41"} (1950)
GRB_DATE:        17214 TJD;   192 DOY;   15/07/11
GRB_TIME:        66183.68 SOD {18:23:03.68} UT
TRIGGER_INDEX:   146
GRB_PHI:         -161.30 [deg]
GRB_THETA:        46.89 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.57 [sigma]
IMAGE_SIGNIF:    7.97 [sigma]
LC_URL:          sw00648601000msb.lc
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 12"}
SUN_DIST:        119.37 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.29d {+03h 41m 11s}  +15.48d {+15d 28' 30"}
MOON_DIST:       156.62 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      230.07,-18.49 [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 = 11.63,-2.10 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:28:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.614d {+14h 46m 27s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.520d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66300.90 SOD {18:25:00.90} UT,   117.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.610
N_STARS:         150
X_OFFSET:        440 [pixels]
Y_OFFSET:        622 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1581 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00648601000msufc0117.fits
SUN_POSTN:       110.72d {+07h 22m 54s}  +22.07d {+22d 04' 11"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.30d {+03h 41m 13s}  +15.48d {+15d 28' 35"}
MOON_DIST:       156.62 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:29:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.614d {+14h 46m 27s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.520d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66300.90 SOD {18:25:00.90} UT,   117.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.610
N_STARS:         150
X_OFFSET:        440 [pixels]
Y_OFFSET:        622 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1581 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00648601000msufc0117.fits
SUN_POSTN:       110.73d {+07h 22m 54s}  +22.07d {+22d 04' 11"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.31d {+03h 41m 15s}  +15.48d {+15d 28' 40"}
MOON_DIST:       156.62 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:30:36 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.614d {+14h 46m 27s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.520d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66300.90 SOD {18:25:00.90} UT,   117.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     458331915
X_OFFSET:        760 [pixels]
Y_OFFSET:        942 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1102
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0132.fits
SUN_POSTN:       110.73d {+07h 22m 54s}  +22.07d {+22d 04' 11"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.32d {+03h 41m 16s}  +15.48d {+15d 28' 45"}
MOON_DIST:       156.62 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:30:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.614d {+14h 46m 27s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.520d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66300.90 SOD {18:25:00.90} UT,   117.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     458331915
X_OFFSET:        760 [pixels]
Y_OFFSET:        942 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1102
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0132.fits
SUN_POSTN:       110.73d {+07h 22m 54s}  +22.07d {+22d 04' 11"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.32d {+03h 41m 17s}  +15.48d {+15d 28' 45"}
MOON_DIST:       156.62 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:37:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.615d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66513.70 SOD {18:28:33.70} UT,   330.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.786
N_STARS:         91
X_OFFSET:        440 [pixels]
Y_OFFSET:        622 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1581 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00648601000msufc0330.fits
SUN_POSTN:       110.73d {+07h 22m 55s}  +22.07d {+22d 04' 09"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.38d {+03h 41m 32s}  +15.49d {+15d 29' 24"}
MOON_DIST:       156.60 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:37:49 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     648601,   Seg_Num: 0
GRB_RA:          221.6271d {+14h 46m 30.50s} (J2000),
                 221.8670d {+14h 47m 28.09s} (current),
                 220.8564d {+14h 43m 25.53s} (1950)
GRB_DEC:         -35.4566d {-35d 27' 23.7"} (J2000),
                 -35.5211d {-35d 31' 15.9"} (current),
                 -35.2473d {-35d 14' 50.1"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66416.00 SOD {18:26:56.00} UT,   232.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       110.73d {+07h 22m 56s}  +22.07d {+22d 04' 08"}
SUN_DIST:        119.36 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.39d {+03h 41m 33s}  +15.49d {+15d 29' 27"}
MOON_DIST:       156.60 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.90, 21.77 [deg] galactic lon,lat of the burst
ECL_COORDS:      230.06,-18.48 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:37:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.615d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66513.70 SOD {18:28:33.70} UT,   330.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.786
N_STARS:         91
X_OFFSET:        440 [pixels]
Y_OFFSET:        622 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1581 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00648601000msufc0330.fits
SUN_POSTN:       110.73d {+07h 22m 55s}  +22.07d {+22d 04' 08"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.39d {+03h 41m 33s}  +15.49d {+15d 29' 27"}
MOON_DIST:       156.59 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:38:52 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.615d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66513.70 SOD {18:28:33.70} UT,   330.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     458332128
X_OFFSET:        760 [pixels]
Y_OFFSET:        942 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1102
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0345.fits
SUN_POSTN:       110.73d {+07h 22m 56s}  +22.07d {+22d 04' 08"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.40d {+03h 41m 36s}  +15.49d {+15d 29' 33"}
MOON_DIST:       156.59 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:39:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.615d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  66513.70 SOD {18:28:33.70} UT,   330.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     458332128
X_OFFSET:        760 [pixels]
Y_OFFSET:        942 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1102
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0345.fits
SUN_POSTN:       110.73d {+07h 22m 56s}  +22.07d {+22d 04' 08"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.40d {+03h 41m 36s}  +15.49d {+15d 29' 34"}
MOON_DIST:       156.59 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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 #18011
M. G. Bernardini (INAF-OAB), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), D. M. Palmer (LANL) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team:
At 18:23:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 150711A (trigger=648601). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 221.631, -35.471 which is
```
   RA(J2000)  =  14h 46m 31s
   Dec(J2000) = -35d 28' 15"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 20 sec. The peak count rate was ~2200 counts/sec (15-350 keV), at ~2 sec after the trigger.
The XRT began observing the field at 18:24:50.4 UT, 106.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 221.6268, -35.4565 which is equivalent to:
```
   RA(J2000)  = 14h 46m 30.44s
   Dec(J2000) = -35d 27' 23.4"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 53 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 consistent with the Galactic value of 8.25 x 10^20 cm^-2 (Willingale et al. 2013).
The initial flux in the 2.5 s image was 1.13e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 117 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.09.
Burst Advocate for this burst is M. G. Bernardini (grazia.bernardini AT brera.inaf.it). 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:     Sat 11 Jul 15 18:43:11 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.616d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  67042.95 SOD {18:37:22.95} UT,   859.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        0.887
N_STARS:         190
X_OFFSET:        200 [pixels]
Y_OFFSET:        382 [pixels]
X_MAX:           1639 [pixels]
Y_MAX:           1821 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00648601000msufc0859.fits
SUN_POSTN:       110.74d {+07h 22m 56s}  +22.07d {+22d 04' 07"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.44d {+03h 41m 45s}  +15.50d {+15d 29' 58"}
MOON_DIST:       156.58 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 15 18:43:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.616d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
POINT_ROLL:      277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  67042.95 SOD {18:37:22.95} UT,   859.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        0.887
N_STARS:         190
X_OFFSET:        200 [pixels]
Y_OFFSET:        382 [pixels]
X_MAX:           1639 [pixels]
Y_MAX:           1821 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00648601000msufc0859.fits
SUN_POSTN:       110.74d {+07h 22m 57s}  +22.07d {+22d 04' 06"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.45d {+03h 41m 47s}  +15.50d {+15d 30' 03"}
MOON_DIST:       156.58 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:44:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.616d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  67042.95 SOD {18:37:22.95} UT,   859.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     458332657
X_OFFSET:        759 [pixels]
Y_OFFSET:        941 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       919
Y_GRB_POS:       1101
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0874.fits
SUN_POSTN:       110.74d {+07h 22m 57s}  +22.07d {+22d 04' 06"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.45d {+03h 41m 49s}  +15.50d {+15d 30' 08"}
MOON_DIST:       156.57 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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:     Sat 11 Jul 15 18:44:33 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     648601,   Seg_Num: 0
POINT_RA:        221.616d {+14h 46m 28s} (J2000)
POINT_DEC:       -35.460d {-35d 27' 35"} (J2000)
ROLL:            277.522d
IMG_START_DATE:  17214 TJD;   192 DOY;   15/07/11
IMG_START_TIME:  67042.95 SOD {18:37:22.95} UT,   859.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     458332657
X_OFFSET:        759 [pixels]
Y_OFFSET:        941 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       919
Y_GRB_POS:       1101
BINNING_INDEX:   1
IM_URL:          sw00648601000msuni0874.fits
SUN_POSTN:       110.74d {+07h 22m 57s}  +22.07d {+22d 04' 06"}
SUN_DIST:        119.35 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:       55.45d {+03h 41m 49s}  +15.50d {+15d 30' 06"}
MOON_DIST:       156.57 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      327.89, 21.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      230.05,-18.49 [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 Circular #18012
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 676 s of XRT Photon Counting mode data and 1 UVOT images for GRB 150711A, 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 = 221.62678, -35.45603 which is equivalent to:
```
RA (J2000): 14h 46m 30.43s
Dec (J2000): -35d 27' 21.7"
```
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 #18014
Antonio de Ugarte Postigo (DARK/NBI), and Vicent Van Eylen (Aarhus University) report on behalf of a larger collaboration:
We observed the field of GRB 150711A (Bernardini et al. GCN 18011) with the 2.5m Nordic Optical Telescope (NOT) equipped with AlFOSC starting at 21:18 UT (2.80 hrs after the trigger). The observation consisted of 3x300s in r-band and 3x300s in i-band and was performed at high airmass and with a seeing of ~ 3". We do not detect any source within the XRT error box (Osborne et al. GCN 18012) down to a limiting magnitude of r ~ 21.5.
GCN Circular #18015
P. Jenke (UAH) reports on behalf of the Fermi GBM Team:
"At 18:23:00.16 UT on July 11 2015, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 150711A (trigger 458331784/150711766), which was also detected by Swift (M. G. Bernardini (INAF-OAB) et al. 2015, GCN 18011). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/XRT location.
The angle of the burst direction to the Fermi LAT boresight is 28 degrees.
The GBM light curve is a single peak with a duration (T90) of about 14s (50-300 keV). The time-averaged spectrum from T0-13s to T0+19s is well fit by a power law with an exponential high-energy cutoff. The power law index is -1.16 +/- 0.07 and the cutoff energy, parameterized as Epeak, is 117 +/- 10 keV.
The event fluence (10-1000 keV) in this time interval is (2.8 +/- 0.06)E-06 ergs/cm^2. The 1.0-sec peak photon flux measured starting from T0+4.7s in the 10-1000 keV band is 4.1 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #18016
M. G. Bernardini (INAF-OAB) reports on behalf of the Swift-XRT team:
We have analysed 6.9 ks of XRT data for GRB 150711A (Bernardini et al. GCN Circ. 18011), from 96 s to 28.3 ks after the BAT trigger. The data comprise 115 s in Windowed Timing (WT) mode (the first 9 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 Osborne et al. (GCN Circ. 18012).
The light curve can be modelled with an initial power-law decay with an index of alpha=2.90 (+0.17, -0.13), followed by a break at T+446 s to an alpha of 0.62 (+0.07, -0.06). Flaring activity is observed between T+150 s and T+225 s.
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.71 (+/-0.14). The best-fitting absorption column is 4.2 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 8.2 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.20 (+0.19, -0.18) and a best-fitting absorption column of 4.2 (+0.9, -0.8) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (6.3 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.2 (+0.9, -0.8) x 10^21 cm^-2
Galactic foreground: 8.2 x 10^20 cm^-2
Excess significance: 6.8 sigma
Photon index:	     2.20 (+0.19, -0.18)
```
If the light curve continues to decay with a power-law decay index of 0.62, the count rate at T+24 hours will be 0.022 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.8 x 10^-13 (1.4 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/00648601.
This circular is an official product of the Swift-XRT team.
GCN Circular #18017
N. P. M. Kuin (UCL-MSSL) and M. G. Bernardini (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150711A 117 s after the BAT trigger (Bernardini et al., GCN Circ. 18011). No optical afterglow consistent with the XRT position (Osborne et al. GCN Circ. 18012) is detected in the initial UVOT exposures. 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           117          267          147         >21.4
u_FC               330          580          246         >20.2
white              117          909          235         >21.9
v                  660          852           39         >19.0
b                  585          778           39         >19.9
u                  330          753          265         >20.2
w1                 709          729           19         >18.8
m2                 684          704           19         >18.9
w2                 636          828           39         >18.8
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.09 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #18020
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), N. Gehrels (GSFC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 150711A (trigger #648601) (Bernardini, et al., GCN Circ. 18011). The BAT ground-calculated position is RA, Dec = 221.624, -35.464 deg which is
```
    RA(J2000)  =  14h 46m 29.7s
    Dec(J2000) = -35d 27' 49.9"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 32%.
The mask-weighted light curve shows a cusp-shaped main peak with smaller preceding and following peaks, each about 20 seconds long. Emission was detectable from T-40 to T+70. T90 (15-350 keV) is 64.2 +- 14.2 sec (estimated error including systematics).
The time-averaged spectrum from T-34.1 to T+70.2 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.79 +- 0.08. The fluence in the 15-150 keV band is 4.3 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+1.98 sec in the 15-150 keV band is 3.8 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/648601/BA/
GCN Circular #18035
E. Mazaeva (IKI), V. Nevskiy (ISON) I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 150711A (Bernardini et al. GCN 18011) with the 40 cm telescope of Burakan-ISON observatory starting on Jul., 11 (UT) 18:36:16, i.e. ~13 min after burst trigger. We obtained several unfiltered images. In a combined image we do not detect any source within the XRT error box (Osborne et al. GCN 18012) down to a limiting magnitude of R = 16.9
```
Date       UT start  t-T0      Filter   Exp.  OT    UL(3 sigma)
                     (mid, days)         (s)

2015-07-11 18:36:16  0.01250   none     9*60  n/d   16.9
```
The photometry is based on nearby USNO-B1.0 stars.

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Jochen Greiner, last update: 19-Jul-2015 [Disclaimer]