Gamma-ray Burst 191101A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Fri 01 Nov 19 21:08:31 UT 
NOTICE_TYPE:     Swift-BAT GRB Position 
TRIGGER_NUM:     932742,   Seg_Num: 0 
GRB_RA:          251.844d {+16h 47m 23s} (J2000), 
                 251.998d {+16h 47m 59s} (current), 
                 251.457d {+16h 45m 50s} (1950) 
GRB_DEC:         +43.754d {+43d 45' 15"} (J2000), 
                 +43.720d {+43d 43' 12"} (current), 
                 +43.842d {+43d 50' 31"} (1950) 
GRB_ERROR:       3.00 [arcmin radius, statistical only] 
GRB_INTEN:       5641 [cnts]    Image_Peak=172 [image_cnts] 
TRIGGER_DUR:     2.048 [sec]  
TRIGGER_INDEX:   262     E_range: 25-100 keV 
BKG_INTEN:       54970 [cnts] 
BKG_TIME:        76048.15 SOD {21:07:28.15} UT 
BKG_DUR:         24 [sec] 
GRB_DATE:        18788 TJD;   305 DOY;   19/11/01 
GRB_TIME:        76083.35 SOD {21:08:03.35} UT 
GRB_PHI:         172.71 [deg] 
GRB_THETA:        40.75 [deg] 
SOLN_STATUS:     0x3 
RATE_SIGNIF:     8.24 [sigma] 
IMAGE_SIGNIF:    7.15 [sigma] 
MERIT_PARAMS:     +1  +0  +0  +1  +2  -3  +0  +0 -39  +0  
SUN_POSTN:       216.76d {+14h 27m 02s}  -14.54d {-14d 32' 36"} 
SUN_DIST:         66.56 [deg]   Sun_angle= -2.3 [hr] (East of Sun) 
MOON_POSTN:      280.96d {+18h 43m 51s}  -23.02d {-23d 01' 09"} 
MOON_DIST:        71.84 [deg] 
MOON_ILLUM:      26 [%] 
GAL_COORDS:       68.69, 40.28 [deg] galactic lon,lat of the burst (or transient) 
ECL_COORDS:      237.60, 65.16 [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 = 240.59,16.90 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 19 21:10:18 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     932742,   Seg_Num: 0
GRB_RA:          251.8359d {+16h 47m 20.6s} (J2000),
                 251.9896d {+16h 47m 57.5s} (current),
                 251.4486d {+16h 45m 47.6s} (1950)
GRB_DEC:         +43.7415d {+43d 44' 29.4"} (J2000),
                 +43.7072d {+43d 42' 25.9"} (current),
                 +43.8292d {+43d 49' 45.0"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       218 [cnts]
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76182.43 SOD {21:09:42.43} UT,   99.1 [sec] since BAT Trigger Time
CENTROID_X:      249.41,  raw= 249  [pixels]
CENTROID_Y:      319.60,  raw= 320  [pixels]
ROLL:            217.32 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   50.69
GRB_POS_XRT_Z:   -136.67
IMAGE_URL:       sw00932742000msxps_rw.img
SUN_POSTN:       216.76d {+14h 27m 02s}  -14.54d {-14d 32' 37"}
SUN_DIST:         66.54 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      280.98d {+18h 43m 56s}  -23.02d {-23d 01' 09"}
MOON_DIST:        71.84 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.67, 40.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      237.59, 65.15 [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:     Fri 01 Nov 19 21:10:20 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     932742,   Seg_Num: 0
GRB_RA:          251.8359d {+16h 47m 20.6s} (J2000),
                 251.9896d {+16h 47m 57.5s} (current),
                 251.4486d {+16h 45m 47.6s} (1950)
GRB_DEC:         +43.7415d {+43d 44' 29.4"} (J2000),
                 +43.7072d {+43d 42' 25.9"} (current),
                 +43.8292d {+43d 49' 45.0"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       218 [cnts]
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76182.43 SOD {21:09:42.43} UT,   99.1 [sec] since BAT Trigger Time
CENTROID_X:      249.41,  raw= 249  [pixels]
CENTROID_Y:      319.60,  raw= 320  [pixels]
ROLL:            217.32 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   50.69
GRB_POS_XRT_Z:   -136.67
IMAGE_URL:       sw00932742000msxps_rw.img
SUN_POSTN:       216.76d {+14h 27m 02s}  -14.54d {-14d 32' 37"}
SUN_DIST:         66.54 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      280.98d {+18h 43m 56s}  -23.02d {-23d 01' 09"}
MOON_DIST:        71.84 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.67, 40.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      237.59, 65.15 [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:     Fri 01 Nov 19 21:10:08 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     932742,   Seg_Num: 0
GRB_RA:          251.8359d {+16h 47m 20.61s} (J2000),
                 251.9896d {+16h 47m 57.51s} (current),
                 251.4486d {+16h 45m 47.67s} (1950)
GRB_DEC:         +43.7415d {+43d 44' 29.4"} (J2000),
                 +43.7072d {+43d 42' 25.9"} (current),
                 +43.8292d {+43d 49' 45.0"} (1950)
GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       8.42e-09 [erg/cm2/sec]
GRB_SIGNIF:      14.76 [sigma]
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76182.43 SOD {21:09:42.43} UT,   99.1 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.13 261.67 243.35
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       216.76d {+14h 27m 02s}  -14.54d {-14d 32' 37"}
SUN_DIST:         66.54 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      280.98d {+18h 43m 55s}  -23.02d {-23d 01' 09"}
MOON_DIST:        71.84 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.67, 40.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      237.59, 65.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.83 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:     Fri 01 Nov 19 21:12:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.853d {+16h 47m 25s} (J2000)
POINT_DEC:       +43.780d {+43d 46' 47"} (J2000)
POINT_ROLL:      217.323d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76192.96 SOD {21:09:52.96} UT,   109.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.715
N_STARS:         88
X_OFFSET:        657 [pixels]
Y_OFFSET:        324 [pixels]
X_MAX:           1616 [pixels]
Y_MAX:           1283 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00932742000msufc0109.fits
SUN_POSTN:       216.76d {+14h 27m 03s}  -14.54d {-14d 32' 39"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.01d {+18h 44m 01s}  -23.02d {-23d 01' 10"}
MOON_DIST:        71.87 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 19 21:13:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.853d {+16h 47m 25s} (J2000)
POINT_DEC:       +43.780d {+43d 46' 47"} (J2000)
POINT_ROLL:      217.323d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76192.96 SOD {21:09:52.96} UT,   109.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.715
N_STARS:         88
X_OFFSET:        657 [pixels]
Y_OFFSET:        324 [pixels]
X_MAX:           1616 [pixels]
Y_MAX:           1283 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00932742000msufc0109.fits
SUN_POSTN:       216.76d {+14h 27m 03s}  -14.54d {-14d 32' 39"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.01d {+18h 44m 02s}  -23.02d {-23d 01' 10"}
MOON_DIST:        71.87 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:14:37 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.853d {+16h 47m 25s} (J2000)
POINT_DEC:       +43.780d {+43d 46' 47"} (J2000)
ROLL:            217.323d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76192.96 SOD {21:09:52.96} UT,   109.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594335416
X_OFFSET:        977 [pixels]
Y_OFFSET:        644 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1137
Y_GRB_POS:       804
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0133.fits
SUN_POSTN:       216.76d {+14h 27m 03s}  -14.54d {-14d 32' 40"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.02d {+18h 44m 06s}  -23.02d {-23d 01' 11"}
MOON_DIST:        71.88 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:14:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.853d {+16h 47m 25s} (J2000)
POINT_DEC:       +43.780d {+43d 46' 47"} (J2000)
ROLL:            217.323d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76192.96 SOD {21:09:52.96} UT,   109.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594335416
X_OFFSET:        977 [pixels]
Y_OFFSET:        644 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1137
Y_GRB_POS:       804
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0133.fits
SUN_POSTN:       216.76d {+14h 27m 03s}  -14.54d {-14d 32' 41"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.03d {+18h 44m 06s}  -23.02d {-23d 01' 11"}
MOON_DIST:        71.88 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:31:08 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 52"} (J2000)
POINT_ROLL:      217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76350.96 SOD {21:12:30.96} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.496
N_STARS:         89
X_OFFSET:        657 [pixels]
Y_OFFSET:        324 [pixels]
X_MAX:           1616 [pixels]
Y_MAX:           1283 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00932742000msufc0267.fits
SUN_POSTN:       216.77d {+14h 27m 06s}  -14.55d {-14d 32' 54"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.19d {+18h 44m 44s}  -23.02d {-23d 01' 18"}
MOON_DIST:        71.94 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.73, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 19 21:32:12 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 52"} (J2000)
ROLL:            217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76350.96 SOD {21:12:30.96} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594335574
X_OFFSET:        977 [pixels]
Y_OFFSET:        644 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1137
Y_GRB_POS:       804
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0291.fits
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 54"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.20d {+18h 44m 47s}  -23.02d {-23d 01' 18"}
MOON_DIST:        71.94 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.73, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:31:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 52"} (J2000)
POINT_ROLL:      217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76350.96 SOD {21:12:30.96} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.496
N_STARS:         89
X_OFFSET:        657 [pixels]
Y_OFFSET:        324 [pixels]
X_MAX:           1616 [pixels]
Y_MAX:           1283 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00932742000msufc0267.fits
SUN_POSTN:       216.77d {+14h 27m 06s}  -14.55d {-14d 32' 54"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.19d {+18h 44m 45s}  -23.02d {-23d 01' 18"}
MOON_DIST:        71.94 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.73, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:33:22 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 51"} (J2000)
POINT_ROLL:      217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76954.14 SOD {21:22:34.14} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.699
N_STARS:         190
X_OFFSET:        417 [pixels]
Y_OFFSET:        84 [pixels]
X_MAX:           1856 [pixels]
Y_MAX:           1523 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00932742000msufc0870.fits
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 55"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.21d {+18h 44m 50s}  -23.02d {-23d 01' 18"}
MOON_DIST:        71.94 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 19 21:32:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 52"} (J2000)
ROLL:            217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76350.96 SOD {21:12:30.96} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594335574
X_OFFSET:        977 [pixels]
Y_OFFSET:        644 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1137
Y_GRB_POS:       804
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0291.fits
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 55"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.20d {+18h 44m 48s}  -23.02d {-23d 01' 18"}
MOON_DIST:        71.94 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.73, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:33:44 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 51"} (J2000)
ROLL:            217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76954.14 SOD {21:22:34.14} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594336177
X_OFFSET:        976 [pixels]
Y_OFFSET:        643 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1136
Y_GRB_POS:       803
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0894.fits
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 56"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.21d {+18h 44m 51s}  -23.02d {-23d 01' 19"}
MOON_DIST:        71.95 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 19 21:33:39 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     932742,   Seg_Num: 0
POINT_RA:        251.850d {+16h 47m 24s} (J2000)
POINT_DEC:       +43.781d {+43d 46' 51"} (J2000)
ROLL:            217.320d
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76954.14 SOD {21:22:34.14} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594336177
X_OFFSET:        976 [pixels]
Y_OFFSET:        643 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1136
Y_GRB_POS:       803
BINNING_INDEX:   1
IM_URL:          sw00932742000msuni0894.fits
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 56"}
SUN_DIST:         66.58 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.21d {+18h 44m 50s}  -23.02d {-23d 01' 19"}
MOON_DIST:        71.95 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.72, 40.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      237.59, 65.19 [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:     Fri 01 Nov 19 21:34:32 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     932742,   Seg_Num: 0
GRB_RA:          251.8371d {+16h 47m 20.90s} (J2000),
                 251.9908d {+16h 47m 57.80s} (current),
                 251.4498d {+16h 45m 47.96s} (1950)
GRB_DEC:         +43.7406d {+43d 44' 26.1"} (J2000),
                 +43.7063d {+43d 42' 22.7"} (current),
                 +43.8283d {+43d 49' 41.8"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18788 TJD;   305 DOY;   19/11/01
IMG_START_TIME:  76381.00 SOD {21:13:01.00} UT,   297.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       216.78d {+14h 27m 06s}  -14.55d {-14d 32' 56"}
SUN_DIST:         66.54 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:      281.22d {+18h 44m 52s}  -23.02d {-23d 01' 19"}
MOON_DIST:        71.92 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       68.67, 40.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      237.60, 65.15 [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 Circular #26135
A. D'Ai (INAF-IASFPA), E. Ambrosi (INAF-IASFPA), V. D'Elia (SSDC), J. A. Kennea (PSU), N. J. Klingler (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 21:08:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191101A (trigger=932742). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 251.844, +43.754 which is
```
   RA(J2000) = 16h 47m 23s
   Dec(J2000) = +43d 45' 15"
```
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 20 sec. The peak count rate was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 21:09:42.4 UT, 99.0 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 251.83474, 43.74103 which is equivalent to:
```
   RA(J2000)  = 16h 47m 20.34s
   Dec(J2000) = +43d 44' 27.7"
```
with an uncertainty of 4.0 arcseconds (radius, 90% containment). This location is 52 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. We cannot determine whether the source is fading at the present time. No spectrum from the promptly downlinked event data is yet available to determine the column density.
The initial flux in the 2.5 s image was 8.42e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 109 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 none of the XRT error circle. 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 0.01.
Burst Advocate for this burst is A. D'Ai (antonino.dai AT 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/)
GCN Circular #26136
The Fermi GBM team reports the detection of a likely SHORT GRB
At 21:28:50 UT on 1 Nov 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191101B (trigger 594336535.522754 / 191101895).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 153.7, Dec = 19.0 (J2000 degrees, equivalent to J2000 10h 14m, 19d 00'), with a statistical uncertainty of 7.8 degrees.
The angle from the Fermi LAT boresight is 118.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191101895/quicklook/glg_skymap_all_bn191101895.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191101895/quicklook/glg_healpix_all_bn191101895.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191101895/quicklook/glg_lc_medres34_bn191101895.gif
GCN Circular #26137
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 191101A, we find an enhanced XRT position of the afterglow: RA, Dec: 251.8374, 43.7406 which is equivalent to:
```
   RA (J2000)  = 16 47 20.97
   Dec (J2000) = +43 44 26.3
```
with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/932742.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #26139
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University)
MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the Swift GRB191101.88 (trigger No 932742,16h 47m 22.608s , +43d 45m 15.12s, R=0.05) errorbox 50 sec after trigger time at 2019-11-01 21:08:53 UT, with upper limit up to 16.2 mag. Observations started at twilight. The observations began at zenith distance = 75 deg. The sun altitude is -11.9 deg.
The galactic latitude b = -60 deg., longitude l = 98 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1184828
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      55 |         MASTER-Amur |  P/ |    10 | 15.6 |        
      74 |         MASTER-Amur |  P/ |    10 | 15.6 |        
      97 |         MASTER-Amur |  P/ |    20 | 15.7 |        
     125 |         MASTER-Amur |  P/ |    20 | 15.6 |        
     158 |         MASTER-Amur |  P/ |    30 | 15.9 |        
     201 |         MASTER-Amur |  P/ |    40 | 16.1 |        
     255 |         MASTER-Amur |  P/ |    50 | 16.2 |        
     318 |         MASTER-Amur |  P/ |    60 | 15.8 |        
     398 |         MASTER-Amur |  P/ |    60 | 15.8 |        
     477 |         MASTER-Amur |  P/ |    60 | 15.7 |        
     556 |         MASTER-Amur |  P/ |    60 | 15.6 |        
     636 |         MASTER-Amur |  P/ |    60 | 15.5 |        
     716 |         MASTER-Amur |  P/ |    60 | 15.6 |        
     795 |         MASTER-Amur |  P/ |    60 | 15.4 |        
     944 |         MASTER-Amur |  P/ |    60 | 15.3 |        
    1023 |         MASTER-Amur |  P/ |    60 | 15.1 |        
    1103 |         MASTER-Amur |  P/ |    60 | 15.0 |        
    1182 |         MASTER-Amur |  P/ |    60 | 14.9 |        
    1262 |         MASTER-Amur |  P/ |    60 | 14.6 |        
```
The observation and reduction will continue. The message may be cited.
GCN Circular #26140
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1298 s of XRT Photon Counting mode data and 1 UVOT images for GRB 191101A, 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 = 251.83723, +43.74096 which is equivalent to:
```
RA (J2000): 16h 47m 20.94s
Dec (J2000): +43d 44' 27.5"
```
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 #26142
P. Gokuldass (UVI), D. Morris (UVI), N. Orange (OrangeWave Innovative Science, LLC), A. Cucchiara (College of Marin), R. Strausbaugh (UVI) report:
We observed the field of GRB 191101A (A.P. Beardmore et al., GCN 26140; P.A. Evans et al., GCN 26137, D'Ai et al., GCN 26135) with the 0.5m Virgin Island Robotic Telescope (VIRT) on 04-Nov-2019 starting at 23:03:18 UT (T+115m). We report on an initial series of exposures in Clear filter totaling 110s with an observation midpoint of T+117m. The weather conditions were very good during the hours of observation and the zenith angle at the start of the observation was 63 degrees. We observed the Swift XRT position with a 20'x20' field of view.
We find no new source at the Swift-XRT position and report a 3-sigma upper limit of approximately V=17.0. The limit is estimated from comparison to nearby USNO B1 stars and is not corrected for Galactic extinction. The VIRT is still in the commissioning phase.
Observations and analysis are ongoing. This message can be cited.
GCN Circular #26144
J. D. Gropp (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (ASDC), V. D'Elia (ASDC), A. Tohuvavohu (U. Toronto), J.A. Kennea (PSU) and A. D'Ai report on behalf of the Swift-XRT team:
We have analysed 7.9 ks of XRT data for GRB 191101A (D'Ai et al. GCN Circ. 26135), from 92 s to 24.5 ks after the BAT trigger. The data comprise 190 s in Windowed Timing (WT) mode (the first 5 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 Beardmore et al. (GCN Circ. 26137). The late-time light curve (from T0+4.8 ks) is consistent with a constant source of mean count rate 4.8e+00 ct/sec. A power-law fit gives an index of 0.18 (+0.22, -0.21).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.28 (+/-0.05). The best-fitting absorption column is 9.9 (+1.2, -1.1) x 10^20 cm^-2, in excess of the Galactic value of 1.3 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.08 (+0.15, -0.14) and a best-fitting absorption column of 6.2 (+3.2, -2.9) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.1 x 10^-11 (3.7 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.2 (+3.2, -2.9) x 10^20 cm^-2
Galactic foreground: 1.3 x 10^20 cm^-2
Excess significance: 2.8 sigma
Photon index:	     2.08 (+0.15, -0.14)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00932742.
This circular is an official product of the Swift-XRT team.
GCN Circular #26145
A.K.H. Kong (NTHU, Taiwan) reports
We observed the field of GRB 191101A (D'Ai et al. GCN 26135) with the T11 0.5m telescope of iTelescope.Net in New Mexico. The observation was done with a luminance filter (400-700 nm) beginning at 2019-11-02 02:08:44 UT (5 hours after the trigger) for 300 sec. At the position of the enhanced X-ray afterglow (Evans et al. GCN 26137), we do not detect any optical emission with a detection limit of about 19.5 mag by comparing with the Gaia DR2 catalogue.
GCN Circular #26164
GRB 191101A: Swift/UVOT Upper Limits
S. J. LaPorte (PSU) and A. D'Ai (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191101A 110 s after the BAT trigger (D'Ai et al., GCN Circ. 26135). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 26140) 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           110          259          147         >21.1
u_FC               268          517          246         >20.3
white              110         5863          589         >21.6
v                  597         1588          110         >19.6
b                  523         5658          294         >21.2
u                  268         5453          540         >20.9
w1                 646         5248          294         >19.3
m2                 622         5043          300         >19.8
w2                 573         1564          117         >19.3
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #26167
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191101A (trigger #932742) (D'Ai, et al., GCN Circ. 26135). The BAT ground-calculated position is RA, Dec = 251.845, 43.740 deg which is
```
  RA(J2000)  =  16h 47m 22.8s 
  Dec(J2000) = +43d 44' 24.5" 
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 47%.
The mask-weighted light curve shows a single, rather weak pulse, extending from ~T-20 sec, peaking at T+0 sec, dropping sharply at T+25 sec, followed by low-level extended emission out to ~T+140 sec. T90 (15-350 keV) is 137.95 +- 22.83 sec (estimated error including systematics).
The time-averaged spectrum from T-20.97 to T+143.53 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.78 +- 0.18. The fluence in the 15-150 keV band is 1.9 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-1.00 sec in the 15-150 keV band is 1.3 +- 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/932742/BA/

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Jochen Greiner, last update: 04-Nov-2019 [Disclaimer]