Gamma-ray Burst 161113A

(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:     Sun 13 Nov 16 17:30:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.834d {+11h 59m 20s} (J2000),
                 180.050d {+12h 00m 12s} (current),
                 179.193d {+11h 56m 46s} (1950)
GRB_DEC:          -5.347d {-05d 20' 49"} (J2000),
                  -5.441d {-05d 26' 27"} (current),
                  -5.069d {-05d 04' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3627 [cnts]    Image_Peak=179 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       23258 [cnts]
BKG_TIME:        63014.84 SOD {17:30:14.84} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17705 TJD;   318 DOY;   16/11/13
GRB_TIME:        63026.74 SOD {17:30:26.74} UT
GRB_PHI:         -172.28 [deg]
GRB_THETA:         8.82 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.13 [sigma]
IMAGE_SIGNIF:    7.96 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -2  +0  +0 -64  +0 
SUN_POSTN:       229.35d {+15h 17m 25s}  -18.21d {-18d 12' 24"}
SUN_DIST:         49.74 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.55d {+02h 34m 13s}  +10.56d {+10d 33' 29"}
MOON_DIST:       141.56 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.98, -4.97 [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 = 267.23,8.26 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 13 Nov 16 17:32:09 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.7926d {+11h 59m 10.2s} (J2000),
                 180.0087d {+12h 00m 02.0s} (current),
                 179.1523d {+11h 56m 36.5s} (1950)
GRB_DEC:          -5.3077d {-05d 18' 27.7"} (J2000),
                  -5.4016d {-05d 24' 05.8"} (current),
                  -5.0293d {-05d 01' 45.5"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       249 [cnts]
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63078.50 SOD {17:31:18.50} UT,   51.8 [sec] since BAT Trigger Time
CENTROID_X:      387.06,  raw= 387  [pixels]
CENTROID_Y:      340.52,  raw= 341  [pixels]
ROLL:            109.37 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   100.71
GRB_POS_XRT_Z:   192.73
IMAGE_URL:       sw00722063000msxps_rw.img
SUN_POSTN:       229.35d {+15h 17m 25s}  -18.21d {-18d 12' 25"}
SUN_DIST:         49.79 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.57d {+02h 34m 16s}  +10.56d {+10d 33' 44"}
MOON_DIST:       141.50 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.71, 55.19 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.93, -4.95 [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:     Sun 13 Nov 16 17:32:03 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.7926d {+11h 59m 10.2s} (J2000),
                 180.0087d {+12h 00m 02.0s} (current),
                 179.1523d {+11h 56m 36.5s} (1950)
GRB_DEC:          -5.3077d {-05d 18' 27.7"} (J2000),
                  -5.4016d {-05d 24' 05.8"} (current),
                  -5.0293d {-05d 01' 45.5"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       249 [cnts]
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63078.50 SOD {17:31:18.50} UT,   51.8 [sec] since BAT Trigger Time
CENTROID_X:      387.06,  raw= 387  [pixels]
CENTROID_Y:      340.52,  raw= 341  [pixels]
ROLL:            109.37 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   100.71
GRB_POS_XRT_Z:   192.73
IMAGE_URL:       sw00722063000msxps_rw.img
SUN_POSTN:       229.35d {+15h 17m 25s}  -18.21d {-18d 12' 25"}
SUN_DIST:         49.79 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.57d {+02h 34m 16s}  +10.56d {+10d 33' 43"}
MOON_DIST:       141.50 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.71, 55.19 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.93, -4.95 [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:     Sun 13 Nov 16 17:31:54 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.7926d {+11h 59m 10.22s} (J2000),
                 180.0087d {+12h 00m 02.09s} (current),
                 179.1523d {+11h 56m 36.55s} (1950)
GRB_DEC:          -5.3077d {-05d 18' 27.7"} (J2000),
                  -5.4016d {-05d 24' 05.8"} (current),
                  -5.0293d {-05d 01' 45.5"} (1950)
GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.07e-08 [erg/cm2/sec]
GRB_SIGNIF:      15.77 [sigma]
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63078.50 SOD {17:31:18.50} UT,   51.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.63 237.21 261.58 243.34
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       229.35d {+15h 17m 25s}  -18.21d {-18d 12' 25"}
SUN_DIST:         49.79 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.57d {+02h 34m 16s}  +10.56d {+10d 33' 42"}
MOON_DIST:       141.50 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.71, 55.19 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.93, -4.95 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 3.41 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:     Sun 13 Nov 16 17:34:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.834d {+11h 59m 20s} (J2000),
                 180.050d {+12h 00m 12s} (current),
                 179.193d {+11h 56m 46s} (1950)
GRB_DEC:          -5.347d {-05d 20' 49"} (J2000),
                  -5.441d {-05d 26' 27"} (current),
                  -5.069d {-05d 04' 06"} (1950)
GRB_DATE:        17705 TJD;   318 DOY;   16/11/13
GRB_TIME:        63026.74 SOD {17:30:26.74} UT
TRIGGER_INDEX:   137
GRB_PHI:         -172.28 [deg]
GRB_THETA:         8.82 [deg]
DELTA_TIME:      -69.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.13 [sigma]
IMAGE_SIGNIF:    7.96 [sigma]
LC_URL:          sw00722063000msb.lc
SUN_POSTN:       229.36d {+15h 17m 25s}  -18.21d {-18d 12' 26"}
SUN_DIST:         49.74 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.59d {+02h 34m 21s}  +10.57d {+10d 34' 05"}
MOON_DIST:       141.52 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.98, -4.97 [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 = 267.23,8.26 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 13 Nov 16 17:40:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.835d {+11h 59m 20s} (J2000)
POINT_DEC:        -5.352d {-05d 21' 05"} (J2000)
POINT_ROLL:      109.372d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63087.05 SOD {17:31:27.05} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        9.539
N_STARS:         16
X_OFFSET:        440 [pixels]
Y_OFFSET:        520 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1479 [pixels]
DET_THRESH:      27
PHOTO_THRESH:    17
SL_URL:          sw00722063000msufc0060.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 31"}
SUN_DIST:         49.75 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.65d {+02h 34m 37s}  +10.59d {+10d 35' 11"}
MOON_DIST:       141.46 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.98, -4.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 13 Nov 16 17:40:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.835d {+11h 59m 20s} (J2000)
POINT_DEC:        -5.352d {-05d 21' 05"} (J2000)
POINT_ROLL:      109.372d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63087.05 SOD {17:31:27.05} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        9.539
N_STARS:         16
X_OFFSET:        440 [pixels]
Y_OFFSET:        520 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1479 [pixels]
DET_THRESH:      27
PHOTO_THRESH:    17
SL_URL:          sw00722063000msufc0060.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 31"}
SUN_DIST:         49.75 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.66d {+02h 34m 38s}  +10.59d {+10d 35' 15"}
MOON_DIST:       141.45 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.98, -4.97 [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:     Sun 13 Nov 16 17:42:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.835d {+11h 59m 20s} (J2000)
POINT_DEC:        -5.352d {-05d 21' 05"} (J2000)
ROLL:            109.372d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63087.05 SOD {17:31:27.05} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     500751104
X_OFFSET:        358 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       518
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00722063000msuni0078.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 32"}
SUN_DIST:         49.75 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.67d {+02h 34m 41s}  +10.59d {+10d 35' 30"}
MOON_DIST:       141.44 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.98, -4.97 [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:     Sun 13 Nov 16 17:42:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.835d {+11h 59m 20s} (J2000)
POINT_DEC:        -5.352d {-05d 21' 05"} (J2000)
ROLL:            109.372d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63087.05 SOD {17:31:27.05} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     500751104
X_OFFSET:        358 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       518
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00722063000msuni0078.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 32"}
SUN_DIST:         49.75 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.68d {+02h 34m 42s}  +10.59d {+10d 35' 33"}
MOON_DIST:       141.44 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.80, 55.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.98, -4.97 [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:     Sun 13 Nov 16 17:45:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.934d {+11h 59m 44s} (J2000)
POINT_DEC:        -5.149d {-05d 08' 56"} (J2000)
POINT_ROLL:      109.501d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63300.09 SOD {17:35:00.09} UT,   273.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.624
N_STARS:         7
X_OFFSET:        38 [pixels]
Y_OFFSET:        547 [pixels]
X_MAX:           997 [pixels]
Y_MAX:           1506 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00722063000msufc0273.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 34"}
SUN_DIST:         49.72 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.71d {+02h 34m 50s}  +10.60d {+10d 36' 04"}
MOON_DIST:       141.47 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.84, 55.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.99, -4.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 13 Nov 16 17:45:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.934d {+11h 59m 44s} (J2000)
POINT_DEC:        -5.149d {-05d 08' 56"} (J2000)
POINT_ROLL:      109.501d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63300.09 SOD {17:35:00.09} UT,   273.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.624
N_STARS:         7
X_OFFSET:        38 [pixels]
Y_OFFSET:        547 [pixels]
X_MAX:           997 [pixels]
Y_MAX:           1506 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00722063000msufc0273.fits
SUN_POSTN:       229.36d {+15h 17m 27s}  -18.21d {-18d 12' 34"}
SUN_DIST:         49.72 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.71d {+02h 34m 50s}  +10.60d {+10d 36' 07"}
MOON_DIST:       141.46 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.84, 55.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.99, -4.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 13 Nov 16 17:47:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.934d {+11h 59m 44s} (J2000)
POINT_DEC:        -5.149d {-05d 08' 56"} (J2000)
ROLL:            109.501d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63300.09 SOD {17:35:00.09} UT,   273.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     500751317
X_OFFSET:        358 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       518
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00722063000msuni0291.fits
SUN_POSTN:       229.37d {+15h 17m 28s}  -18.21d {-18d 12' 35"}
SUN_DIST:         49.72 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.72d {+02h 34m 53s}  +10.61d {+10d 36' 18"}
MOON_DIST:       141.45 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.84, 55.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.99, -4.75 [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:     Sun 13 Nov 16 17:47:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     722063,   Seg_Num: 0
POINT_RA:        179.934d {+11h 59m 44s} (J2000)
POINT_DEC:        -5.149d {-05d 08' 56"} (J2000)
ROLL:            109.501d
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63300.09 SOD {17:35:00.09} UT,   273.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     500751317
X_OFFSET:        358 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       518
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00722063000msuni0291.fits
SUN_POSTN:       229.37d {+15h 17m 28s}  -18.21d {-18d 12' 35"}
SUN_DIST:         49.73 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.73d {+02h 34m 55s}  +10.61d {+10d 36' 26"}
MOON_DIST:       141.44 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.84, 55.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.99, -4.75 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #20172
P. D'Avanzo (INAF-OAB), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/NSF/USRA), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 17:30:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 161113A (trigger=722063). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 179.834, -5.347, which is
```
   RA(J2000)  =  11h 59m 20s
   Dec(J2000) = -05d 20' 49"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two overlapping peaks with a total duration of about 45 sec. The peak count rate was ~2400 counts/sec (15-350 keV), at ~15 sec after the trigger.
The XRT began observing the field at 17:31:18.5 UT, 51.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 179.79351, -5.30848 which is equivalent to:
```
   RA(J2000)  = 11h 59m 10.44s
   Dec(J2000) = -05d 18' 30.5"
```
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 200 arcseconds from the BAT onboard position. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (2.11 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 6.5 (+6.17/-4.70) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.07e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 78 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 0.02.
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:     Sun 13 Nov 16 17:58:02 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     722063,   Seg_Num: 0
GRB_RA:          179.7935d {+11h 59m 10.43s} (J2000),
                 180.0096d {+12h 00m 02.30s} (current),
                 179.1532d {+11h 56m 36.77s} (1950)
GRB_DEC:          -5.3084d {-05d 18' 30.2"} (J2000),
                  -5.4023d {-05d 24' 08.3"} (current),
                  -5.0300d {-05d 01' 48.0"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17705 TJD;   318 DOY;   16/11/13
IMG_START_TIME:  63204.00 SOD {17:33:24.00} UT,   177.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       229.37d {+15h 17m 30s}  -18.21d {-18d 12' 42"}
SUN_DIST:         49.81 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:       38.83d {+02h 35m 20s}  +10.64d {+10d 38' 11"}
MOON_DIST:       141.23 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      279.71, 55.19 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.93, -4.95 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN Circular #20173
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 161113A (D'Avanzo, et al., GCN 20172) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2016/11 14.48 to 2016/11 14.52 UTC (17.94 to 19.01 hours after the BAT trigger), obtaining a total of 0.71 hours exposure in the r and i bands and 0.14 hours exposure in the Z, Y, and H bands.
For a source within the Swift-XRT error circle, in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following upper limits (3-sigma):
```
  r > 22.41
  i > 22.18
  Z > 21.21
  Y > 20.72
  H > 18.83
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #20174
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 2998 s of XRT Photon Counting mode data and 2 UVOT images for GRB 161113A, 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 = 179.79452, -5.30897 which is equivalent to:
```
RA (J2000): 11h 59m 10.68s
Dec (J2000): -05d 18' 32.3"
```
with an uncertainty of 2.2 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 #20175
E. Mazaeva (IKI), A. Ivanov (KubSU), V. Ivanov (KubSU), V. Lysenko (KubSU), D. Ivanova (KubSU), A. Volnova (IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 161113A (D'Avanzo, et al., GCN 20172) with the RC510 telescope (0.51-m f/8) of Kuban State University Astrophysical Observatory. We obtained several unfiltered images starting on Nov. 14 (UT) 02:02:08. Within enhanced XRT position (Evans et al., GCN 20174) we do not detect any source. Preliminary photometry of the field is following
```
   Date       UT start   t-T0    Filter  Exp.  OT   Err. UL(3 sigma)
                        (mid, days)      (s)
2016-11-14   02:02:08   0.37062 CR      52*30 n/d  n/d  18.9
```
Photometry is based on nearby USNO-B1.0 stars (R2 magnitudes).
GCN Circular #20176
J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), B. Mingo (U. Leicester) report on behalf of the Swift-XRT team:
We have analysed 23 ks of XRT data for GRB 161113A (D'Avanzo et al. GCN Circ. 20172), from 42 s to 74.9 ks after the BAT trigger. The data comprise 118 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 20174).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=2.52 (+0.25, -0.28). At T+109 s the decay steepens to an alpha of 6.0 (+0.5, -0.4) before breaking again at T+272 s to a final decay with index alpha=0.45 (+0.04, -0.05).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.82 (+/-0.09). The best-fitting absorption column is 3.63 (+0.29, -0.27) x 10^21 cm^-2, in excess of the Galactic value of 2.1 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.03 (+0.22, -0.21) and a best-fitting absorption column of 1.2 (+0.6, -0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.3 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.2 (+0.6, -0.5) x 10^21 cm^-2
Galactic foreground: 2.1 x 10^20 cm^-2
Excess significance: 3.0 sigma
Photon index:	     2.03 (+0.22, -0.21)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00722063.
This circular is an official product of the Swift-XRT team.
GCN Circular #20177
A. A. Breeveld (UCL-MSSL), P. D'Avanzo (INAF-OAB) and S. W. K. Emery (UCL-MSSL) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161113A 61 s after the BAT trigger (D'Avanzo et al., GCN Circ. 20172). No optical afterglow consistent with the XRT position (Evans et al. GCN Circ. 20174) 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) exposures and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            61          211          147         >19.8
u_FC               274          483          206         >18.8
white              555         6332          369         >21.0
v                 5152         5352          197         >19.2
b                 4537         6171          393         >20.1
u                  274         5966          599         >19.6
w1                4126         5762          393         >20.1
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #20178
S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB), N. Gehrels (GSFC), H. A. Krimm (NSF/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-240 to T+499 sec from the recent telemetry downlink, we report further analysis of BAT GRB 161113A (trigger #722063) (D'Avanzo, et al., GCN Circ. 20172). The BAT ground-calculated position is RA, Dec = 179.794, -5.316 deg which is
```
   RA(J2000)  =  11h 59m 10.6s 
   Dec(J2000) = -05d 18' 57.3" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a pair of overlapping peaks, both containing substructure. The first peak begins at T-3 sec and peaks at T+5 sec. The second peaks at T+15 sec and continues until about T+60 sec. T90 (15-350 keV) is 42.60 +- 11.10 sec (estimated error including systematics).
The time-averaged spectrum from T+0.12 to T+64.88 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.73 +- 0.10. The fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+15.28 sec in the 15-150 keV band is 1.4 +- 0.2 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/722063/BA/

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Jochen Greiner, last update: 15-Nov-2016 [Disclaimer]