Gamma-ray Burst 160905A

(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:     Mon 05 Sep 16 11:19:13 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.237d {+10h 48m 57s} (J2000),
                 162.416d {+10h 49m 40s} (current),
                 161.701d {+10h 46m 48s} (1950)
GRB_DEC:         -50.800d {-50d 47' 59"} (J2000),
                 -50.888d {-50d 53' 18"} (current),
                 -50.535d {-50d 32' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4895 [cnts]    Image_Peak=487 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       20201 [cnts]
BKG_TIME:        40727.18 SOD {11:18:47.18} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40738.38 SOD {11:18:58.38} UT
GRB_PHI:         -70.66 [deg]
GRB_THETA:         9.37 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     42.59 [sigma]
IMAGE_SIGNIF:    16.29 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +4  +0  +1 -53  +0 
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 11"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.73d {+13h 54m 55s}   -7.61d {-07d 36' 33"}
MOON_DIST:        57.68 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      192.31,-51.97 [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 = 325.70,8.70 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=494767139).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:19:20 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      50
TRIGGER_NUM:     494767139
GRB_RA:          163.367d {+10h 53m 28s} (J2000),
                 163.550d {+10h 54m 12s} (current),
                 162.818d {+10h 51m 16s} (1950)
GRB_DEC:         -48.667d {-48d 40' 00"} (J2000),
                 -48.756d {-48d 45' 20"} (current),
                 -48.400d {-48d 24' 00"} (1950)
GRB_ERROR:       10.15 [deg radius, statistical plus systematic]
GRB_INTEN:       131 [cnts/sec]
DATA_SIGNIF:     7.60 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40735.91 SOD {11:18:55.91} UT
GRB_PHI:         120.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.72
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 11"}
SUN_DIST:         55.32 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.73d {+13h 54m 55s}   -7.61d {-07d 36' 34"}
MOON_DIST:        55.93 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.67,  9.74 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      191.19,-49.83 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160905471/quicklook/glg_lc_medres34_bn160905471.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 358.97,6.17 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=711084).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:19:29 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     494767139
GRB_RA:          163.833d {+10h 55m 20s} (J2000),
                 164.018d {+10h 56m 04s} (current),
                 163.282d {+10h 53m 08s} (1950)
GRB_DEC:         -48.617d {-48d 37' 00"} (J2000),
                 -48.706d {-48d 42' 20"} (current),
                 -48.350d {-48d 20' 58"} (1950)
GRB_ERROR:       4.85 [deg radius, statistical plus systematic]
GRB_INTEN:       607 [cnts/sec]
DATA_SIGNIF:     55.00 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40735.91 SOD {11:18:55.91} UT
GRB_PHI:         120.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.50
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 11"}
SUN_DIST:         55.26 [deg]   Sun_angle= 0.0 [hr] (West of Sun)
MOON_POSTN:      208.73d {+13h 54m 55s}   -7.61d {-07d 36' 35"}
MOON_DIST:        55.64 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.93,  9.92 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      191.53,-49.61 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160905471/quicklook/glg_lc_medres34_bn160905471.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 358.97,6.17 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=711084).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:19:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     494767139
GRB_RA:          161.780d {+10h 47m 07s} (J2000),
                 161.957d {+10h 47m 50s} (current),
                 161.252d {+10h 45m 00s} (1950)
GRB_DEC:         -51.900d {-51d 53' 59"} (J2000),
                 -51.988d {-51d 59' 17"} (current),
                 -51.636d {-51d 38' 08"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
DATA_SIGNIF:     23.70 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40735.91 SOD {11:18:55.91} UT
GRB_PHI:         126.00 [deg]
GRB_THETA:        18.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 11"}
SUN_DIST:         58.59 [deg]   Sun_angle= 0.2 [hr] (West of Sun)
MOON_POSTN:      208.73d {+13h 54m 55s}   -7.61d {-07d 36' 36"}
MOON_DIST:        58.51 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      284.24,  6.40 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      193.07,-53.01 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160905471/quicklook/glg_lc_medres34_bn160905471.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_494767139.fits
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.  
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(3.0<100sec) coincident with the SWIFT_BAT event (trignum=711084).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:19:36 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      70
TRIGGER_NUM:     494767139
GRB_RA:          157.883d {+10h 31m 32s} (J2000),
                 158.053d {+10h 32m 13s} (current),
                 157.376d {+10h 29m 30s} (1950)
GRB_DEC:         -51.583d {-51d 34' 59"} (J2000),
                 -51.669d {-51d 40' 09"} (current),
                 -51.326d {-51d 19' 32"} (1950)
GRB_ERROR:       4.25 [deg radius, statistical plus systematic]
GRB_INTEN:       1018 [cnts/sec]
DATA_SIGNIF:     91.70 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40735.91 SOD {11:18:55.91} UT
GRB_PHI:         120.00 [deg]
GRB_THETA:        20.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.45
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 11"}
SUN_DIST:         58.50 [deg]   Sun_angle= 0.4 [hr] (West of Sun)
MOON_POSTN:      208.73d {+13h 54m 55s}   -7.61d {-07d 36' 36"}
MOON_DIST:        60.43 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      281.96,  5.50 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      189.57,-54.28 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160905471/quicklook/glg_lc_medres34_bn160905471.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 358.97,6.17 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=711084).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 05 Sep 16 11:20:14 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger 
TRIGGER_NUM:    7554,   Sub_Num: 0
GRB_INTEN:      9.28 [sigma]
GRB_TIME:       40735.86 SOD {11:18:55.86} UT
GRB_DATE:       17636 TJD;   249 DOY;   16/09/05
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=0.8000 and Time_Error=0.4000.
COMMENTS:       
COMMENTS:       NOTE: This SPIACS event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=494767139).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2016-09/2016-09-05T11-18-55.7199-0492 0-60304-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:20:31 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.2448d {+10h 48m 58.75s} (J2000),
                 162.4239d {+10h 49m 41.73s} (current),
                 161.7094d {+10h 46m 50.25s} (1950)
GRB_DEC:         -50.8014d {-50d 48' 05.0"} (J2000),
                 -50.8899d {-50d 53' 23.5"} (current),
                 -50.5367d {-50d 32' 11.9"} (1950)
GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.05e-09 [erg/cm2/sec]
GRB_SIGNIF:      12.40 [sigma]
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40796.06 SOD {11:19:56.06} UT,   57.7 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.16 261.71 243.54
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 10"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.74d {+13h 54m 57s}   -7.61d {-07d 36' 44"}
MOON_DIST:        57.68 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.99,  7.51 [deg] galactic lon,lat of the burst
ECL_COORDS:      192.32,-51.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.32 arcmin from the BAT position.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:20:41 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.2448d {+10h 48m 58.7s} (J2000),
                 162.4239d {+10h 49m 41.7s} (current),
                 161.7094d {+10h 46m 50.2s} (1950)
GRB_DEC:         -50.8014d {-50d 48' 05.0"} (J2000),
                 -50.8899d {-50d 53' 23.5"} (current),
                 -50.5367d {-50d 32' 11.9"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       154 [cnts]
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40796.06 SOD {11:19:56.06} UT,   57.7 [sec] since BAT Trigger Time
CENTROID_X:      303.21,  raw= 303  [pixels]
CENTROID_Y:      286.35,  raw= 286  [pixels]
ROLL:            2.83 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -26.98
GRB_POS_XRT_Z:   -4.91
IMAGE_URL:       sw00711084000msxps_rw.img
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 10"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.74d {+13h 54m 57s}   -7.61d {-07d 36' 46"}
MOON_DIST:        57.68 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.99,  7.51 [deg] galactic lon,lat of the burst
ECL_COORDS:      192.32,-51.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:20:55 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.2448d {+10h 48m 58.7s} (J2000),
                 162.4239d {+10h 49m 41.7s} (current),
                 161.7094d {+10h 46m 50.2s} (1950)
GRB_DEC:         -50.8014d {-50d 48' 05.0"} (J2000),
                 -50.8899d {-50d 53' 23.5"} (current),
                 -50.5367d {-50d 32' 11.9"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       154 [cnts]
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40796.06 SOD {11:19:56.06} UT,   57.7 [sec] since BAT Trigger Time
CENTROID_X:      303.21,  raw= 303  [pixels]
CENTROID_Y:      286.35,  raw= 286  [pixels]
ROLL:            2.83 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -26.98
GRB_POS_XRT_Z:   -4.91
IMAGE_URL:       sw00711084000msxps_rw.img
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 10"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.74d {+13h 54m 58s}   -7.61d {-07d 36' 48"}
MOON_DIST:        57.68 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.99,  7.51 [deg] galactic lon,lat of the burst
ECL_COORDS:      192.32,-51.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:22:58 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.237d {+10h 48m 57s} (J2000),
                 162.416d {+10h 49m 40s} (current),
                 161.701d {+10h 46m 48s} (1950)
GRB_DEC:         -50.800d {-50d 47' 59"} (J2000),
                 -50.888d {-50d 53' 18"} (current),
                 -50.535d {-50d 32' 06"} (1950)
GRB_DATE:        17636 TJD;   249 DOY;   16/09/05
GRB_TIME:        40738.38 SOD {11:18:58.38} UT
TRIGGER_INDEX:   146
GRB_PHI:         -70.66 [deg]
GRB_THETA:         9.37 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     42.59 [sigma]
IMAGE_SIGNIF:    16.29 [sigma]
LC_URL:          sw00711084000msb.lc
SUN_POSTN:       164.63d {+10h 58m 32s}   +6.55d {+06d 33' 08"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.76d {+13h 55m 02s}   -7.62d {-07d 37' 05"}
MOON_DIST:        57.69 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      192.31,-51.97 [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 = 325.70,8.70 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:25:06 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.234d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.802d {-50d 48' 06"} (J2000)
POINT_ROLL:      2.824d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40805.02 SOD {11:20:05.02} UT,   66.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.578
N_STARS:         135
X_OFFSET:        512 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00711084000msufc0066.fits
SUN_POSTN:       164.64d {+10h 58m 32s}   +6.55d {+06d 33' 06"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.77d {+13h 55m 06s}   -7.62d {-07d 37' 24"}
MOON_DIST:        57.70 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:25:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.234d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.802d {-50d 48' 06"} (J2000)
POINT_ROLL:      2.824d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40805.02 SOD {11:20:05.02} UT,   66.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.578
N_STARS:         135
X_OFFSET:        512 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00711084000msufc0066.fits
SUN_POSTN:       164.64d {+10h 58m 33s}   +6.55d {+06d 33' 05"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.78d {+13h 55m 07s}   -7.62d {-07d 37' 28"}
MOON_DIST:        57.70 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.97 [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:     Mon 05 Sep 16 11:27:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.234d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.802d {-50d 48' 06"} (J2000)
ROLL:            2.824d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40805.02 SOD {11:20:05.02} UT,   66.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     494767221
X_OFFSET:        840 [pixels]
Y_OFFSET:        917 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1000
Y_GRB_POS:       1077
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0083.fits
SUN_POSTN:       164.64d {+10h 58m 33s}   +6.55d {+06d 33' 04"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.79d {+13h 55m 10s}   -7.63d {-07d 37' 43"}
MOON_DIST:        57.70 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.97 [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:     Mon 05 Sep 16 11:27:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.234d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.802d {-50d 48' 06"} (J2000)
ROLL:            2.824d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40805.02 SOD {11:20:05.02} UT,   66.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     494767221
X_OFFSET:        840 [pixels]
Y_OFFSET:        917 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1000
Y_GRB_POS:       1077
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0083.fits
SUN_POSTN:       164.64d {+10h 58m 33s}   +6.55d {+06d 33' 04"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.80d {+13h 55m 11s}   -7.63d {-07d 37' 46"}
MOON_DIST:        57.70 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.97 [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:     Mon 05 Sep 16 11:29:56 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     711084,   Seg_Num: 0
GRB_RA:          162.2465d {+10h 48m 59.15s} (J2000),
                 162.4256d {+10h 49m 42.14s} (current),
                 161.7111d {+10h 46m 50.66s} (1950)
GRB_DEC:         -50.8012d {-50d 48' 04.3"} (J2000),
                 -50.8897d {-50d 53' 22.8"} (current),
                 -50.5365d {-50d 32' 11.2"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         15.88 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  40803.00 SOD {11:20:03.00} UT,   64.6 [sec] since BAT Trigger Time
SUN_POSTN:       164.64d {+10h 58m 33s}   +6.55d {+06d 33' 01"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.81d {+13h 55m 15s}   -7.64d {-07d 38' 06"}
MOON_DIST:        57.70 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.99,  7.51 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      192.32,-51.97 [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 4.0 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:32:03 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.803d {-50d 48' 12"} (J2000)
POINT_ROLL:      2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41018.31 SOD {11:23:38.31} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.826
N_STARS:         86
X_OFFSET:        520 [pixels]
Y_OFFSET:        597 [pixels]
X_MAX:           1479 [pixels]
Y_MAX:           1556 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00711084000msufc0279.fits
SUN_POSTN:       164.64d {+10h 58m 34s}   +6.55d {+06d 32' 59"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.83d {+13h 55m 19s}   -7.64d {-07d 38' 24"}
MOON_DIST:        57.71 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:32:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.803d {-50d 48' 12"} (J2000)
POINT_ROLL:      2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41018.31 SOD {11:23:38.31} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.826
N_STARS:         86
X_OFFSET:        520 [pixels]
Y_OFFSET:        597 [pixels]
X_MAX:           1479 [pixels]
Y_MAX:           1556 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00711084000msufc0279.fits
SUN_POSTN:       164.64d {+10h 58m 34s}   +6.55d {+06d 32' 59"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.83d {+13h 55m 20s}   -7.64d {-07d 38' 27"}
MOON_DIST:        57.71 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #19887
P. D'Avanzo (INAF-OAB), A. P. Beardmore (U Leicester), A. A. Breeveld (UCL-MSSL), D. N. Burrows (PSU), P.A. Evans (U Leicester), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team:
At 11:18:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160905A (trigger=711084). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 162.237, -50.800 which is
```
   RA(J2000) = 10h 48m 57s
   Dec(J2000) = -50d 47' 59"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 50 sec. The peak count rate was ~13000 counts/sec (15-350 keV), at ~18 sec after the trigger.
The XRT began observing the field at 11:19:56.0 UT, 57.7 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 162.2448, -50.8014 which is equivalent to:
```
   RA(J2000)  = +10h 48m 58.75s
   Dec(J2000) = -50d 48' 05.0"
```
with an uncertainty of 4.8 arcseconds (radius, 90% containment). This location is 18 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
The initial flux in the 2.5 s image was 6.05e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 66 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	10:48:59.18 = 162.24658
  DEC(J2000) = -50:48:04.3  = -50.80120
```
with a 90%-confidence error radius of about 0.61 arc sec. This position is 4.1 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.88 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.46.
Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo 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:     Mon 05 Sep 16 11:34:49 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.803d {-50d 48' 12"} (J2000)
ROLL:            2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41018.31 SOD {11:23:38.31} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     494767435
X_OFFSET:        840 [pixels]
Y_OFFSET:        917 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1000
Y_GRB_POS:       1077
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0296.fits
SUN_POSTN:       164.64d {+10h 58m 34s}   +6.55d {+06d 32' 57"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.85d {+13h 55m 25s}   -7.65d {-07d 38' 48"}
MOON_DIST:        57.72 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [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).  
COMMENTS:        This notice was forced out after watchdog timer expiring -- most likely due to missing packet(s);  
COMMENTS:        as a consequence some of the fields may be incoorect (eg TRIGGER_NUM,RA,DEC).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:35:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.803d {-50d 48' 12"} (J2000)
ROLL:            2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41018.31 SOD {11:23:38.31} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     494767435
X_OFFSET:        840 [pixels]
Y_OFFSET:        917 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1000
Y_GRB_POS:       1077
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0296.fits
SUN_POSTN:       164.64d {+10h 58m 34s}   +6.55d {+06d 32' 57"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.85d {+13h 55m 25s}   -7.65d {-07d 38' 50"}
MOON_DIST:        57.72 [deg]
MOON_ILLUM:      15 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [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.  
COMMENTS:        This notice was forced out after watchdog timer expiring -- most likely due to missing packet(s);  
COMMENTS:        as a consequence some of the fields may be incoorect (eg TRIGGER_NUM,RA,DEC).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:49:12 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.804d {-50d 48' 12"} (J2000)
POINT_ROLL:      2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41598.46 SOD {11:33:18.46} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.284
N_STARS:         190
X_OFFSET:        280 [pixels]
Y_OFFSET:        357 [pixels]
X_MAX:           1719 [pixels]
Y_MAX:           1796 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00711084000msufc0860.fits
SUN_POSTN:       164.65d {+10h 58m 36s}   +6.55d {+06d 32' 44"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.97d {+13h 55m 52s}   -7.68d {-07d 40' 53"}
MOON_DIST:        57.75 [deg]
MOON_ILLUM:      16 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 05 Sep 16 11:49:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.804d {-50d 48' 12"} (J2000)
POINT_ROLL:      2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41598.46 SOD {11:33:18.46} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.284
N_STARS:         190
X_OFFSET:        280 [pixels]
Y_OFFSET:        357 [pixels]
X_MAX:           1719 [pixels]
Y_MAX:           1796 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00711084000msufc0860.fits
SUN_POSTN:       164.65d {+10h 58m 36s}   +6.55d {+06d 32' 43"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.97d {+13h 55m 53s}   -7.68d {-07d 40' 56"}
MOON_DIST:        57.75 [deg]
MOON_ILLUM:      16 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [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:     Mon 05 Sep 16 11:50:15 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.804d {-50d 48' 12"} (J2000)
ROLL:            2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41598.46 SOD {11:33:18.46} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     494768015
X_OFFSET:        839 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       999
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0877.fits
SUN_POSTN:       164.65d {+10h 58m 36s}   +6.55d {+06d 32' 43"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.98d {+13h 55m 54s}   -7.68d {-07d 41' 02"}
MOON_DIST:        57.75 [deg]
MOON_ILLUM:      16 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [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:     Mon 05 Sep 16 11:50:43 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711084,   Seg_Num: 0
POINT_RA:        162.232d {+10h 48m 56s} (J2000)
POINT_DEC:       -50.804d {-50d 48' 12"} (J2000)
ROLL:            2.830d
IMG_START_DATE:  17636 TJD;   249 DOY;   16/09/05
IMG_START_TIME:  41598.46 SOD {11:33:18.46} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     494768015
X_OFFSET:        839 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       999
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00711084000msuni0877.fits
SUN_POSTN:       164.65d {+10h 58m 36s}   +6.55d {+06d 32' 42"}
SUN_DIST:         57.47 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      208.98d {+13h 55m 55s}   -7.69d {-07d 41' 06"}
MOON_DIST:        57.76 [deg]
MOON_ILLUM:      16 [%]
GAL_COORDS:      283.98,  7.51 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.31,-51.98 [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 Circular #19889
E. Bissaldi (Politcenico & INFN Bari) reports on behalf of the Fermi GBM Team:
"At 11:18:55.91 UT on 5 September 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160905A (trigger 494767139 / 160905471), which was also detected by the Swift/BAT (D'Avanzo et al. 2016, GCN 19887= ). The GBM on-ground location is consistent with the Swift position.
The trigger resulted in an Autonomous Repoint Request (ARR) by the GBM Flight Software owing to the high peak flux of the GRB. This ARR was accepted and the spacecraft slewed to the GBM in-flight location. The initial angle from the Fermi LAT boresight to the GBM ground location is 18 degrees.
The GBM light curve consists of two peaks with a duration (T90) of about 34 s (50-300 keV). The time-averaged spectrum from T0 to T0+40 s is adequately fit by a Band function with Epeak =3D 830 =EF=BF=BD 30 keV, alpha =3D -0.77 =EF=BF=BD 0.01, and beta =3D -2.43 =EF=BF=BD 0.09.
The event fluence (10-1000 keV) in this time interval is (9.0 =EF=BF=BD 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+20 s in the 10-1000 keV band is 16.2 =EF=BF=BD 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #19890
J. E. McEnery (NASA/GSFC), F. Longo (University & INFN Trieste), E. Bissaldi (Politecnico & INFN Bari) and D. Kocevski (NASA/GSFC) report on behalf of the Fermi-LAT team:
At 11:18:55.91 on September, 05, 2016 Fermi-LAT detected high-energy emission from GRB 160905*A*, which was also detected by Swift (GCN 19887) and Fermi-GBM (trigger 494767139/160905471; GCN 19889).
The data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the trigger with high significance.
The best LAT on-ground location is found to be RA, Dec = 162.02, -50.88 (J2000) with an error radius of 0.08 deg (90 % containment, statistical error only).
This was 18 deg from the LAT boresight at the time of the trigger.
The highest-energy photon is a *8 GeV* event which was observed *350* seconds after the GBM trigger.
The Fermi-LAT point of contact for this burst is * Dan Kocevski (daniel.kocevski@nasa.gov )*.
The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN Circular #19891
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 854 s of XRT Photon Counting mode data and 3 UVOT images for GRB 160905A, 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 = 162.24585, -50.80095 which is equivalent to:
```
RA (J2000): 10h 48m 59.00s
Dec (J2000): -50d 48' 03.4"
```
with an uncertainty of 1.4 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 #19894
A. Melandri (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), L.M. McCauley (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), B. Mingo (U. Leicester), V. D'Elia (ASDC) and P. D'Avanzo report on behalf of the Swift-XRT team:
We have analysed 7.2 ks of XRT data for GRB 160905A (D'Avanzo et al. GCN Circ. 19887), from 50 s to 29.8 ks after the BAT trigger. The data comprise 2.2 ks in Windowed Timing (WT) mode (the first 6 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. 19891).
The late-time light curve (from T0+5.6 ks) can be modelled with a series of power-law decays. The initial decay index is alpha=0.5 (+0.6, -0.4). At T+7998 s the decay steepens to an alpha of 7.92 (+0.08, -5.15). The light curve breaks again at T+9660 s to a decay with alpha=-1.5 (+0.0, -0.4), before a final break at T+15.0 ks s after which the decay index is 1.0 (+/-0.3).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.729 (+/-0.024). The best-fitting absorption column is 4.89 (+0.18, -0.17) x 10^21 cm^-2, in excess of the Galactic value of 3.8 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.84 (+0.12, -0.11) and a best-fitting absorption column of 5.9 (+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 4.7 x 10^-11 (7.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.9 (+0.9, -0.8) x 10^21 cm^-2
Galactic foreground: 3.8 x 10^21 cm^-2
Excess significance: 4.4 sigma
Photon index:	     1.84 (+0.12, -0.11)
```
If the light curve continues to decay with a power-law decay index of 1.0, the count rate at T+24 hours will be 0.10 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.7 x 10^-12 (7.1 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/00711084.
This circular is an official product of the Swift-XRT team.
GCN Circular #19896
S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), 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-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 160905A (trigger #711084) (D'Avanzo, et al., GCN Circ. 19887). The BAT ground-calculated position is RA, Dec = 162.249, -50.803 deg which is
```
    RA(J2000)  =  10h 48m 59.7s
    Dec(J2000) = -50d 48' 09.2"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 98%.
The mask-weighted light curve shows a bright main episode with several overlapping peaks starting at ~T-10 sec, peaking at ~T+10 sec and ending at ~T+25 sec. The additional peak is seen starting at ~T+30 sec, peaking at ~T+35 sec and ending at ~T+40 sec. The further weak extended emission is visible up to ~T+180 sec. T90 (15-350 keV) is 64 +- 16 sec (estimated error including systematics).
The time-averaged spectrum from T-15.2 to T+96.8 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.04 +- 0.03. The fluence in the 15-150 keV band is 1.50 +- 0.02 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+8.30 sec in the 15-150 keV band is 6.3 +- 0.3 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/711084/BA/
GCN Circular #19897
S.W.K. Emery (UCL-MSSL) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160905A 67 s after the BAT trigger (D'Avanzo et al., GCN Circ. 19887), which was also detected by Fermi-GBM (GCN 19889) and Fermi-LAT (GCN 19890). A fading source consistent with the XRT position (Osborne et al. GCN Circ. 19891) is detected in the initial UVOT exposure= s.
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          67           216          147         15.8 =EF=BF=BD 0.=
03
white                 67         2234          469         17.1 =EF=BF=BD=
 0.05
u_FC              280           530          246         18.3 =EF=BF=BD 0=
.15
u                      280         2185          401         18.8 =EF=BF=BD=
 0.16
v                      610         2285          195         17.4 =EF=BF=BD=
 0.12
b                      536         2210          175         18.7 =EF=BF=BD=
 0.16
w1                   660         2160          175         >19.1
m2                   635         2296          162         >19.1
w2                   586         2260          195         >19.4
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) =3D 0.45 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #19900
A. Tsvetkova, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, A. Lysenko, A. Kozlova and T. Cline on behalf of the Konus-Wind team, report:
The long-duration, hard-spectrum GRB 160905A (Swift-BAT trigger #711084: D'Avanzo et al., GCN 19887; Barthelmy et al., GCN 19896; Fermi GBM observation: Bissaldi, GCN 19889; Fermi-LAT detection: McEnery et al., GCN 19890) triggered Konus-Wind at T0=40735.196 s UT (11:18:55.196).
The burst light curve shows a double-peaked structure with a total duration of ~44 s. The emission is seen up to ~10 MeV.
As observed by Konus-Wind, the burst had a fluence of 1.50(-0.11,+0.11)x10^-4 erg/cm2, and a 64-ms peak energy flux, measured from T0+10.224 s, of 1.17(-0.23,+0.23)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum of the burst (measured from T0 to T0+42.240 s) is best fit in the 20 keV - 18 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.70(-0.05,+0.06), the high energy photon index beta = -2.39(-0.26,+0.16), the peak energy Ep = 594(-50,+56) keV, chi2 = 124/97 dof.
The spectrum near the peak count rate (measured from T0+7.424 to T0+12.288 s) is best fit in the 20 keV - 18 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.65(-0.08,+0.09), the high energy photon index beta = -2.53(-0.44,+0.25), the peak energy Ep = 664(-81,+88) keV, chi2 = 96/83 dof.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160905_T40735/
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.

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Jochen Greiner, last update: 06-Sep-2016 [Disclaimer]