Gamma-ray Burst 191106A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:15:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     933515,   Seg_Num: 0
GRB_RA:          269.350d {+17h 57m 24s} (J2000),
                 269.489d {+17h 57m 57s} (current),
                 268.998d {+17h 55m 59s} (1950)
GRB_DEC:         +46.052d {+46d 03' 06"} (J2000),
                 +46.051d {+46d 03' 02"} (current),
                 +46.056d {+46d 03' 21"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1891 [cnts]    Image_Peak=125 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       18221 [cnts]
BKG_TIME:        51312.12 SOD {14:15:12.12} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18793 TJD;   310 DOY;   19/11/06
GRB_TIME:        51323.90 SOD {14:15:23.90} UT
GRB_PHI:          42.19 [deg]
GRB_THETA:        15.44 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     20.56 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  -2  +0  +0 -24  +0 
SUN_POSTN:       221.41d {+14h 45m 39s}  -16.00d {-16d 00' 02"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.86d {+22h 43m 26s}  -12.72d {-12d 43' 07"}
MOON_DIST:        86.69 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.96, 28.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      268.71, 69.49 [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 = 335.08,20.44 [deg].

red DSS finding chart ps-file

GCN NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Wed 06 Nov 19 14:16:45 UT 
NOTICE_TYPE:     Swift-XRT Nack-Position 
TRIGGER_NUM:     933515,   Seg_Num: 0 
POINT_RA:        269.326d {+17h 57m 18s} (J2000) 
POINT_DEC:       +46.038d {+46d 02' 16"} (J2000) 
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06 
IMG_START_TIME:  51394.23 SOD {14:16:34.23} UT,   70.3 [sec] since BAT Trigger Time 
COUNTS:          18    Min_needed= 20 
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec] 
PH2_ITER:        1    Max_iter_allowed= 4 
ERROR_CODE:      1 
COMMENTS:        SWIFT-XRT Nack Position.   
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:19:03 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     933515,   Seg_Num: 0
GRB_RA:          269.350d {+17h 57m 24s} (J2000),
                 269.489d {+17h 57m 57s} (current),
                 268.998d {+17h 55m 59s} (1950)
GRB_DEC:         +46.052d {+46d 03' 06"} (J2000),
                 +46.051d {+46d 03' 02"} (current),
                 +46.056d {+46d 03' 21"} (1950)
GRB_DATE:        18793 TJD;   310 DOY;   19/11/06
GRB_TIME:        51323.90 SOD {14:15:23.90} UT
TRIGGER_INDEX:   124
GRB_PHI:          42.19 [deg]
GRB_THETA:        15.44 [deg]
DELTA_TIME:      -56.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     20.56 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
LC_URL:          sw00933515000msb.lc
SUN_POSTN:       221.42d {+14h 45m 40s}  -16.00d {-16d 00' 04"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.89d {+22h 43m 33s}  -12.71d {-12d 42' 35"}
MOON_DIST:        86.70 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.96, 28.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      268.71, 69.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 335.08,20.44 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:20:27 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     933515,   Seg_Num: 0
GRB_RA:          269.3356d {+17h 57m 20.54s} (J2000),
                 269.4753d {+17h 57m 54.08s} (current),
                 268.9837d {+17h 55m 56.09s} (1950)
GRB_DEC:         +46.0352d {+46d 02' 06.7"} (J2000),
                 +46.0341d {+46d 02' 02.5"} (current),
                 +46.0393d {+46d 02' 21.4"} (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:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51430.00 SOD {14:17:10.00} UT,   106.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       221.42d {+14h 45m 40s}  -16.00d {-16d 00' 05"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.90d {+22h 43m 35s}  -12.71d {-12d 42' 21"}
MOON_DIST:        86.71 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.21 [deg] galactic lon,lat of the burst
ECL_COORDS:      268.68, 69.47 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:22:07 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.035d {+46d 02' 08"} (J2000)
POINT_ROLL:      227.455d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51454.51 SOD {14:17:34.51} UT,   130.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.509
N_STARS:         130
X_OFFSET:        93 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1532 [pixels]
Y_MAX:           1839 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00933515000msufc0130.fits
SUN_POSTN:       221.42d {+14h 45m 40s}  -16.00d {-16d 00' 07"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.91d {+22h 43m 38s}  -12.70d {-12d 42' 04"}
MOON_DIST:        86.72 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:22:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.035d {+46d 02' 08"} (J2000)
POINT_ROLL:      227.455d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51454.51 SOD {14:17:34.51} UT,   130.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.509
N_STARS:         130
X_OFFSET:        93 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1532 [pixels]
Y_MAX:           1839 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00933515000msufc0130.fits
SUN_POSTN:       221.42d {+14h 45m 41s}  -16.00d {-16d 00' 07"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.91d {+22h 43m 39s}  -12.70d {-12d 42' 02"}
MOON_DIST:        86.72 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:23:16 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.035d {+46d 02' 08"} (J2000)
ROLL:            227.455d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51454.51 SOD {14:17:34.51} UT,   130.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594742678
X_OFFSET:        652 [pixels]
Y_OFFSET:        959 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       812
Y_GRB_POS:       1119
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni0154.fits
SUN_POSTN:       221.42d {+14h 45m 41s}  -16.00d {-16d 00' 07"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.92d {+22h 43m 41s}  -12.70d {-12d 41' 53"}
MOON_DIST:        86.72 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:23:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.035d {+46d 02' 08"} (J2000)
ROLL:            227.455d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51454.51 SOD {14:17:34.51} UT,   130.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594742678
X_OFFSET:        652 [pixels]
Y_OFFSET:        959 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       812
Y_GRB_POS:       1119
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni0154.fits
SUN_POSTN:       221.42d {+14h 45m 41s}  -16.00d {-16d 00' 08"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.92d {+22h 43m 41s}  -12.70d {-12d 41' 51"}
MOON_DIST:        86.72 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:22:42 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     933515,   Seg_Num: 0
GRB_RA:          269.3349d {+17h 57m 20.37s} (J2000),
                 269.4747d {+17h 57m 53.91s} (current),
                 268.9830d {+17h 55m 55.92s} (1950)
GRB_DEC:         +46.0345d {+46d 02' 04.2"} (J2000),
                 +46.0334d {+46d 02' 00.0"} (current),
                 +46.0386d {+46d 02' 18.9"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  51430.00 SOD {14:17:10.00} UT,   106.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       221.42d {+14h 45m 41s}  -16.00d {-16d 00' 07"}
SUN_DIST:         75.66 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      340.91d {+22h 43m 40s}  -12.70d {-12d 41' 59"}
MOON_DIST:        86.71 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.21 [deg] galactic lon,lat of the burst
ECL_COORDS:      268.68, 69.47 [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 #26177
F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), M. G. Bernardini (INAF-OAB), D. N. Burrows (PSU), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), P. A. Evans (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU), N. J. Klingler (PSU), S. J. LaPorte (PSU), A. Melandri (INAF-OAB), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), M. H. Siegel (PSU) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 14:15:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191106A (trigger=933515). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 269.350, +46.052, which is
```
   RA(J2000)c =  17h 57m 24s
   Dec(J2000) = +46d 03' 06"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a few peaks with a total duration of about 5 sec. The peak count rate was ~2800 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 14:16:34.2 UT, 70.3 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 269.3349, 46.0346 which is equivalent to:
```
   RA(J2000)  = 17h 57m 20.38s
   Dec(J2000) = +46d 02' 04.7"
```
with an uncertainty of 2.4 arcseconds (radius, 90% containment). This location is 73 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (4.38 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 4 (+4.05/-3.32) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 130 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 19.2 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.06.
Burst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.nasa.gov). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:46:45 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.036d {+46d 02' 08"} (J2000)
POINT_ROLL:      227.454d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  52185.85 SOD {14:29:45.85} UT,   861.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.272
N_STARS:         138
X_OFFSET:        93 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1532 [pixels]
Y_MAX:           1839 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00933515000msufc0861.fits
SUN_POSTN:       221.44d {+14h 45m 45s}  -16.01d {-16d 00' 25"}
SUN_DIST:         75.65 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.11d {+22h 44m 25s}  -12.63d {-12d 38' 03"}
MOON_DIST:        86.79 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:47:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.036d {+46d 02' 08"} (J2000)
POINT_ROLL:      227.454d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  52185.85 SOD {14:29:45.85} UT,   861.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.272
N_STARS:         138
X_OFFSET:        93 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1532 [pixels]
Y_MAX:           1839 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00933515000msufc0861.fits
SUN_POSTN:       221.44d {+14h 45m 45s}  -16.01d {-16d 00' 25"}
SUN_DIST:         75.65 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.11d {+22h 44m 26s}  -12.63d {-12d 38' 00"}
MOON_DIST:        86.79 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:47:52 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.036d {+46d 02' 08"} (J2000)
ROLL:            227.454d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  52185.85 SOD {14:29:45.85} UT,   861.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594743409
X_OFFSET:        652 [pixels]
Y_OFFSET:        959 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       812
Y_GRB_POS:       1119
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni0885.fits
SUN_POSTN:       221.44d {+14h 45m 45s}  -16.01d {-16d 00' 26"}
SUN_DIST:         75.65 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.11d {+22h 44m 27s}  -12.63d {-12d 37' 52"}
MOON_DIST:        86.80 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN Circular #26178
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina,P.Balanutsa,A.Kuznetsov,V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, A.Pozdnyakov, E.Minkina, V.Senik (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 Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) started Swift GRB 191106A (Marshall et al. GCN 26177) alert observation 19 sec after at 2019-11-06 14:16:03 UT.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the GRB191106.59 19 sec after notice time (39 sec after trigger time) at 2019-11-06 14:16:03 UT at sunset (sun altitude is -8.5 deg.).
There is no OT with 5-sigma upper limit 14.0 mag at 2019-11-06 14:38:00UT.
Error-box galactic latitude b = 28 deg., longitude l = 73 deg. The observations made on zenith distance = 27 deg.The moon (70 % bright part) is 26 deg. above the horizon. The distance between moon and object is 87 deg. The error-box can be observed till sunrise at 2019-11-07 03:49:40
MASTER-Amur was pointed to GRB 191106A 20 sec after notice time (41s after trigger time) at 2019-11-06 14:16:05 UT, but there are clouds.
The message may be cited.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 14:48:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.326d {+17h 57m 18s} (J2000)
POINT_DEC:       +46.036d {+46d 02' 08"} (J2000)
ROLL:            227.454d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  52185.85 SOD {14:29:45.85} UT,   861.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     594743409
X_OFFSET:        652 [pixels]
Y_OFFSET:        959 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       812
Y_GRB_POS:       1119
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni0885.fits
SUN_POSTN:       221.44d {+14h 45m 45s}  -16.01d {-16d 00' 26"}
SUN_DIST:         75.65 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.12d {+22h 44m 28s}  -12.63d {-12d 37' 49"}
MOON_DIST:        86.80 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       72.94, 28.22 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.67, 69.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 15:43:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.357d {+17h 57m 26s} (J2000)
POINT_DEC:       +46.060d {+46d 03' 36"} (J2000)
POINT_ROLL:      227.438d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  56310.08 SOD {15:38:30.08} UT,   4986.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.137
N_STARS:         53
X_OFFSET:        528 [pixels]
Y_OFFSET:        491 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1450 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    13
SL_URL:          sw00933515000msufc4986.fits
SUN_POSTN:       221.47d {+14h 45m 54s}  -16.02d {-16d 01' 07"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.55d {+22h 46m 12s}  -12.48d {-12d 28' 47"}
MOON_DIST:        86.95 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:       72.97, 28.20 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.73, 69.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 15:42:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.357d {+17h 57m 26s} (J2000)
POINT_DEC:       +46.060d {+46d 03' 36"} (J2000)
POINT_ROLL:      227.438d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  56310.08 SOD {15:38:30.08} UT,   4986.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.137
N_STARS:         53
X_OFFSET:        528 [pixels]
Y_OFFSET:        491 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1450 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    13
SL_URL:          sw00933515000msufc4986.fits
SUN_POSTN:       221.47d {+14h 45m 54s}  -16.02d {-16d 01' 07"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.55d {+22h 46m 12s}  -12.48d {-12d 28' 50"}
MOON_DIST:        86.95 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:       72.97, 28.20 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.73, 69.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 15:46:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.357d {+17h 57m 26s} (J2000)
POINT_DEC:       +46.060d {+46d 03' 36"} (J2000)
ROLL:            227.438d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  56310.08 SOD {15:38:30.08} UT,   4986.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594747533
X_OFFSET:        847 [pixels]
Y_OFFSET:        810 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       970
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni5010.fits
SUN_POSTN:       221.48d {+14h 45m 54s}  -16.02d {-16d 01' 09"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.57d {+22h 46m 18s}  -12.47d {-12d 28' 19"}
MOON_DIST:        86.96 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:       72.97, 28.20 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.73, 69.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN Circular #26179
Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado (IAA-CSIC), C. Perez del Pulgar, A. Castellon, I. Carrasco (Univ. de Malaga), S. Guziy (Univ. of Nikolaev) and D. Xiong, Y. Fan, X. Zhao, J. Bai, C. Wang, Y. Xin (Yunnan National Astronomical Observatory) on behalf of a larger collaboration, report:
Following the detection of GRB 191106A by Swift (Marshall et al. GCNC 26177), the 0.6m BOOTES-4/MET robotic telescope at Lijiang Astronomical Observatory (China) gathered images starting at 14:21 UT (~5.7 min after trigger). No optical afterglow is found down to 20.7 mag (unfiltered images) within the Swift/XRT error box, consistent with the non-detections by Swift/UVOT (Marshall et al. GCNC 26177) and MASTER (Lipunov et al. GCNC 26178). Observations are ongoing.
We thank the staff at Lijiang Astronomical Observatory for their excellent support.
GCN Circular #26180
S. Belkin (IKI), E. Klunko (ISTP), A. Pozanenko (IKI), E. Mazaeva (IKI), A. Volnova report on behalf of IKI-GRB-FuN:
We observed the field of GRB 191106A (Marshall et al. GCN 26177) with AZT-33IK telescope of Sayan observatory (Mondy) starting on Nov. 06 (UT) 14:24:30, i.e. ~11 minutes after GRB trigger. We do not detect any optical object in the XRT error circle (Marshall et al. GCN 26177). Preliminary photometry of the field is following.
```
Date       UT start   t-T0       Filter Exp.    OT       UL(3sigma)
                       (mid, days)        (s)

2019-11-06 14:24:30    0.03688    R      22*120  n/d      22.0
```
Photometry is based on the USNO-B2.0 nearby stars.
GCN Circular #26190
K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), M. Perri (ASDC), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Tohuvavohu (U. Toronto), J.A. Kennea (PSU), B. Sbarufatti (PSU) and F.E. Marshall report on behalf of the Swift-XRT team:
We have analysed 6.3 ks of XRT data for GRB 191106A (Marshall et al. GCN Circ. 26177), from 106 s to 13.2 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The best available XRT position (using the promptly downlinked event data, the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) is RA, Dec = 269.3356, 46.0353 which is equivalent to:
```
RA (J2000): 17 57 20.55
Dec(J2000): +46 02 06.9
```
with an uncertainty of 2.3 arcsec (radius, 90% confidence).
The light curve can be modelled with a power-law decay with a decay index of alpha=3.37 (+0.33, -0.30).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.1 (+/-0.6). The best-fitting absorption column is 3.1 (+3.1, -2.1) x 10^21 cm^-2, in excess of the Galactic value of 4.4 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.7 x 10^-11 (5.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.1 (+3.1, -2.1) x 10^21 cm^-2
Galactic foreground: 4.4 x 10^20 cm^-2
Excess significance: 2.1 sigma
Photon index:	     2.1 (+/-0.6)
```
If the light curve continues to decay with a power-law decay index of 3.37, the count rate at T+24 hours will be 7.4 x 10^-10 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.7 x 10^-20 (4.1 x 10^-20) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00933515.
This circular is an official product of the Swift-XRT team.
GCN Circular #26191
Z.P. Zhu, D. Xu (NAOC), J. Viuho (NOT) report on behalf of a larger collaboration:
We observed the field of GRB 191106A (Marshall et al., GCN 26177) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations started at 19:35:51 UT on 2019-11-06 (i.e., 3.35 hr after the BAT trigger), and 16x200s Sloan z-band frames were obtained.
No optical source is detected in our stacked image at the XRT position (Page et al., GCN 26190), down to a limiting magnitude of z > 22.0 at a mean time of 4.0 hr post-burst, calibrated with the nearby SDSS field.
GCN Circular #26198
S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), F. E. Marshall (NASA/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-61 to T+242 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191106A (trigger #933515) (Marshall et al., GCN Circ. 26177). The BAT ground-calculated position is RA, Dec = 269.356, 46.046 deg which is
```
   RA(J2000)  =  17h 57m 25.4s
   Dec(J2000) = +46d 02' 44.7"
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 95%.
The mask-weighted light curve shows many overlapping pulses. The burst emission starts at ~T-1.3 s and ends at ~T+2.4 s. T90 (15-350 keV) is 3.42 +- 0.35 sec (estimated error including systematics).
The time-averaged spectrum from T-1.31 to T+2.38 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.89 +- 0.17. The fluence in the 15-150 keV band is 3.2 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.02 sec in the 15-150 keV band is 1.1 +- 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/933515/BA/
GCN Circular #26199
S. R. Oates (U.Warwick) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191106A 132 s after the BAT trigger (Marshall et al., GCN Circ. 26177). No optical afterglow consistent with the XRT position (Page et al., GCN Circ. 26190) 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          4987         5137          147         >20.0
u_FC               132          381          246         >20.1
white             4987         6775          541         >21.0
v                  437         7186          549         >19.9
b                  387        12533         1264         >21.3
u                  132        11621         1631         >20.8
w1                 486         7510          464         >20.0
m2                 461         7391          510         >20.0
w2                 412        13245         1223         >20.6
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.06 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #26201
R. Gaikwad, S. Gupta, V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed a weak detection of a GRB 191106A, which was also detected by Swift (Marshall F. E. et al., GCN # 26177), MASTER (Lipunov V. et al., GCN # 26178), BOOTES-4/MET (Hu Y.-D. et al., GCN # 26179), Mondy (Belkin S. et al., GCN # 26180), Swift-XRT (Page K. L. et al., GCN # 26190), NOT (Zhu Z. P. et al., GCN # 26191), Swift/BAT (Barthelmy S. D. et al., GCN # 26198) and Swift/UVOT (Oates S. R. et al., GCN # 26199).
The source was detected in the 40-200 keV energy range. The light curve showed single pulse of emission peaking at 2019-11-06 14:15:23.0 UT. The measured peak count rate associated with the burst is 134 cts/s above the background in the combined data of four quadrants, with a total of 408 cts. The local mean background count rate was 502 cts/s. Using cumulative rates, we measure a T90 of 3.6 s.
It was also detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.

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Jochen Greiner, last update: 08-Nov-2019 [Disclaimer]