Gamma-ray Burst 191123A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Sat 23 Nov 19 10:42:54 UT 
NOTICE_TYPE:     Swift-BAT GRB Position 
TRIGGER_NUM:     939079,   Seg_Num: 0 
GRB_RA:          215.261d {+14h 21m 03s} (J2000), 
                 215.489d {+14h 21m 57s} (current), 
                 214.688d {+14h 18m 45s} (1950) 
GRB_DEC:         +22.842d {+22d 50' 30"} (J2000), 
                 +22.751d {+22d 45' 05"} (current), 
                 +23.070d {+23d 04' 11"} (1950) 
GRB_ERROR:       3.00 [arcmin radius, statistical only] 
GRB_INTEN:       3490 [cnts]    Image_Peak=162 [image_cnts] 
TRIGGER_DUR:     1.024 [sec]  
TRIGGER_INDEX:   146     E_range: 25-100 keV 
BKG_INTEN:       21897 [cnts] 
BKG_TIME:        38312.03 SOD {10:38:32.03} UT 
BKG_DUR:         8 [sec] 
GRB_DATE:        18810 TJD;   327 DOY;   19/11/23 
GRB_TIME:        38324.31 SOD {10:38:44.31} UT 
GRB_PHI:         -124.57 [deg] 
GRB_THETA:        17.54 [deg] 
SOLN_STATUS:     0x3 
RATE_SIGNIF:     12.16 [sigma] 
IMAGE_SIGNIF:    7.27 [sigma] 
MERIT_PARAMS:     +1  +0  +0  +0  +2  -3  +0  +0 -65  +0  
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 24"} 
SUN_DIST:         48.66 [deg]   Sun_angle= 1.5 [hr] (West of Sun) 
MOON_POSTN:      198.91d {+13h 15m 39s}   -2.51d {-02d 30' 40"} 
MOON_DIST:        30.00 [deg] 
MOON_ILLUM:      13 [%] 
GAL_COORDS:       25.95, 69.28 [deg] galactic lon,lat of the burst (or transient) 
ECL_COORDS:      203.92, 34.60 [deg] ecliptic lon,lat of the burst (or transient) 
COMMENTS:        SWIFT-BAT GRB Coordinates.   
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;   
COMMENTS:        probably due to it occurring during a Malindi downlink session.   
COMMENTS:        This is a rate trigger.   
COMMENTS:        A point_source was found.   
COMMENTS:        This does not match any source in the on-board catalog.   
COMMENTS:        This does not match any source in the ground catalog.   
COMMENTS:        This is a GRB.   
COMMENTS:        This trigger occurred at longitude,latitude = 257.69,20.49 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:44:01 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.261d {+14h 21m 03s} (J2000),
                 215.489d {+14h 21m 57s} (current),
                 214.688d {+14h 18m 45s} (1950)
GRB_DEC:         +22.842d {+22d 50' 30"} (J2000),
                 +22.751d {+22d 45' 05"} (current),
                 +23.070d {+23d 04' 11"} (1950)
GRB_DATE:        18810 TJD;   327 DOY;   19/11/23
GRB_TIME:        38324.31 SOD {10:38:44.31} UT
TRIGGER_INDEX:   146
GRB_PHI:         -124.57 [deg]
GRB_THETA:        17.54 [deg]
DELTA_TIME:      51.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.16 [sigma]
IMAGE_SIGNIF:    7.27 [sigma]
LC_URL:          sw00939079000msb.lc
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.66 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.92d {+13h 15m 41s}   -2.52d {-02d 30' 55"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.95, 69.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      203.92, 34.60 [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 = 257.69,20.49 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:43:32 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.2707d {+14h 21m 04.9s} (J2000),
                 215.4986d {+14h 22m 00.3s} (current),
                 214.6978d {+14h 18m 47.4s} (1950)
GRB_DEC:         +22.8557d {+22d 51' 20.5"} (J2000),
                 +22.7654d {+22d 45' 55.4"} (current),
                 +23.0838d {+23d 05' 01.6"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       72 [cnts]
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38394.12 SOD {10:39:54.12} UT,   69.8 [sec] since BAT Trigger Time
CENTROID_X:      292.43,  raw= 292  [pixels]
CENTROID_Y:      316.55,  raw= 317  [pixels]
ROLL:            150.28 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   43.50
GRB_POS_XRT_Z:   -35.28
IMAGE_URL:       sw00939079000msxps_rw.img
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.67 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.92d {+13h 15m 40s}   -2.51d {-02d 30' 49"}
MOON_DIST:        30.01 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.27 [deg] galactic lon,lat of the burst
ECL_COORDS:      203.92, 34.61 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:44:17 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.254d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 28"} (J2000)
POINT_ROLL:      150.281d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38402.57 SOD {10:40:02.57} UT,   78.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.791
N_STARS:         19
X_OFFSET:        592 [pixels]
Y_OFFSET:        496 [pixels]
X_MAX:           1551 [pixels]
Y_MAX:           1455 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00939079000msufc0078.fits
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.68 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.92d {+13h 15m 42s}   -2.52d {-02d 31' 00"}
MOON_DIST:        30.00 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:43:34 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.2707d {+14h 21m 04.9s} (J2000),
                 215.4986d {+14h 22m 00.3s} (current),
                 214.6978d {+14h 18m 47.4s} (1950)
GRB_DEC:         +22.8557d {+22d 51' 20.5"} (J2000),
                 +22.7654d {+22d 45' 55.4"} (current),
                 +23.0838d {+23d 05' 01.6"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       72 [cnts]
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38394.12 SOD {10:39:54.12} UT,   69.8 [sec] since BAT Trigger Time
CENTROID_X:      292.43,  raw= 292  [pixels]
CENTROID_Y:      316.55,  raw= 317  [pixels]
ROLL:            150.28 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   43.50
GRB_POS_XRT_Z:   -35.28
IMAGE_URL:       sw00939079000msxps_rw.img
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.67 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.92d {+13h 15m 40s}   -2.51d {-02d 30' 49"}
MOON_DIST:        30.01 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.27 [deg] galactic lon,lat of the burst
ECL_COORDS:      203.92, 34.61 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:44:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.254d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 28"} (J2000)
POINT_ROLL:      150.281d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38402.57 SOD {10:40:02.57} UT,   78.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.791
N_STARS:         19
X_OFFSET:        592 [pixels]
Y_OFFSET:        496 [pixels]
X_MAX:           1551 [pixels]
Y_MAX:           1455 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00939079000msufc0078.fits
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.68 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.93d {+13h 15m 42s}   -2.52d {-02d 31' 04"}
MOON_DIST:        30.00 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:43:23 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.2707d {+14h 21m 04.96s} (J2000),
                 215.4986d {+14h 22m 00.33s} (current),
                 214.6978d {+14h 18m 47.48s} (1950)
GRB_DEC:         +22.8557d {+22d 51' 20.5"} (J2000),
                 +22.7654d {+22d 45' 55.4"} (current),
                 +23.0838d {+23d 05' 01.6"} (1950)
GRB_ERROR:       5.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       2.33e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.48 [sigma]
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38394.12 SOD {10:39:54.12} UT,   69.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.13 261.60 243.72
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       238.70d {+15h 54m 47s}  -20.32d {-20d 19' 25"}
SUN_DIST:         48.67 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.91d {+13h 15m 40s}   -2.51d {-02d 30' 46"}
MOON_DIST:        30.01 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.27 [deg] galactic lon,lat of the burst
ECL_COORDS:      203.92, 34.61 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.00 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:47:12 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.254d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 28"} (J2000)
ROLL:            150.281d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38402.57 SOD {10:40:02.57} UT,   78.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     596198426
X_OFFSET:        818 [pixels]
Y_OFFSET:        751 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       978
Y_GRB_POS:       911
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0102.fits
SUN_POSTN:       238.70d {+15h 54m 48s}  -20.32d {-20d 19' 27"}
SUN_DIST:         48.68 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.95d {+13h 15m 48s}   -2.53d {-02d 31' 41"}
MOON_DIST:        30.00 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:47:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.254d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 28"} (J2000)
ROLL:            150.281d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38402.57 SOD {10:40:02.57} UT,   78.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     596198426
X_OFFSET:        818 [pixels]
Y_OFFSET:        751 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       978
Y_GRB_POS:       911
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0102.fits
SUN_POSTN:       238.70d {+15h 54m 48s}  -20.32d {-20d 19' 27"}
SUN_DIST:         48.68 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      198.95d {+13h 15m 48s}   -2.53d {-02d 31' 43"}
MOON_DIST:        30.00 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:52:49 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 00s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
POINT_ROLL:      150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38614.47 SOD {10:43:34.47} UT,   290.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.071
N_STARS:         7
X_OFFSET:        498 [pixels]
Y_OFFSET:        431 [pixels]
X_MAX:           1457 [pixels]
Y_MAX:           1390 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00939079000msufc0290.fits
SUN_POSTN:       238.70d {+15h 54m 49s}  -20.33d {-20d 19' 30"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.00d {+13h 16m 00s}   -2.55d {-02d 33' 00"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:53:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 00s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
POINT_ROLL:      150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38614.47 SOD {10:43:34.47} UT,   290.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.071
N_STARS:         7
X_OFFSET:        498 [pixels]
Y_OFFSET:        431 [pixels]
X_MAX:           1457 [pixels]
Y_MAX:           1390 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00939079000msufc0290.fits
SUN_POSTN:       238.70d {+15h 54m 49s}  -20.33d {-20d 19' 30"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.00d {+13h 16m 01s}   -2.55d {-02d 33' 04"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:53:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 00s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
ROLL:            150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38614.47 SOD {10:43:34.47} UT,   290.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     596198638
X_OFFSET:        818 [pixels]
Y_OFFSET:        751 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       978
Y_GRB_POS:       911
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0314.fits
SUN_POSTN:       238.70d {+15h 54m 49s}  -20.33d {-20d 19' 30"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.01d {+13h 16m 03s}   -2.56d {-02d 33' 17"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:54:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 00s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
ROLL:            150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38614.47 SOD {10:43:34.47} UT,   290.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     596198638
X_OFFSET:        818 [pixels]
Y_OFFSET:        751 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       978
Y_GRB_POS:       911
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0314.fits
SUN_POSTN:       238.70d {+15h 54m 49s}  -20.33d {-20d 19' 30"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.01d {+13h 16m 04s}   -2.56d {-02d 33' 21"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 10:56:37 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.2619d {+14h 21m 02.85s} (J2000),
                 215.4898d {+14h 21m 57.55s} (current),
                 214.6890d {+14h 18m 45.36s} (1950)
GRB_DEC:         +22.8600d {+22d 51' 35.9"} (J2000),
                 +22.7697d {+22d 46' 10.9"} (current),
                 +23.0881d {+23d 05' 17.2"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         18.12 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38399.00 SOD {10:39:59.00} UT,   74.7 [sec] since BAT Trigger Time
SUN_POSTN:       238.71d {+15h 54m 50s}  -20.33d {-20d 19' 32"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.04d {+13h 16m 09s}   -2.57d {-02d 33' 54"}
MOON_DIST:        29.99 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       26.00, 69.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      203.91, 34.61 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 32.8 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 11:00:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
POINT_ROLL:      150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  39193.67 SOD {10:53:13.67} UT,   869.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.518
N_STARS:         52
X_OFFSET:        258 [pixels]
Y_OFFSET:        191 [pixels]
X_MAX:           1697 [pixels]
Y_MAX:           1630 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00939079000msufc0869.fits
SUN_POSTN:       238.71d {+15h 54m 50s}  -20.33d {-20d 19' 34"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.07d {+13h 16m 18s}   -2.58d {-02d 34' 52"}
MOON_DIST:        29.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 11:00:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
POINT_ROLL:      150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  39193.67 SOD {10:53:13.67} UT,   869.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.518
N_STARS:         52
X_OFFSET:        258 [pixels]
Y_OFFSET:        191 [pixels]
X_MAX:           1697 [pixels]
Y_MAX:           1630 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00939079000msufc0869.fits
SUN_POSTN:       238.71d {+15h 54m 50s}  -20.33d {-20d 19' 34"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.08d {+13h 16m 18s}   -2.58d {-02d 34' 55"}
MOON_DIST:        29.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 11:02:28 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
ROLL:            150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  39193.67 SOD {10:53:13.67} UT,   869.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     596199217
X_OFFSET:        817 [pixels]
Y_OFFSET:        750 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       977
Y_GRB_POS:       910
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0893.fits
SUN_POSTN:       238.71d {+15h 54m 51s}  -20.33d {-20d 19' 35"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.09d {+13h 16m 22s}   -2.59d {-02d 35' 17"}
MOON_DIST:        29.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [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:     Sat 23 Nov 19 11:02:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     939079,   Seg_Num: 0
POINT_RA:        215.252d {+14h 21m 01s} (J2000)
POINT_DEC:       +22.858d {+22d 51' 30"} (J2000)
ROLL:            150.279d
IMG_START_DATE:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  39193.67 SOD {10:53:13.67} UT,   869.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     596199217
X_OFFSET:        817 [pixels]
Y_OFFSET:        750 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       977
Y_GRB_POS:       910
BINNING_INDEX:   1
IM_URL:          sw00939079000msuni0893.fits
SUN_POSTN:       238.71d {+15h 54m 51s}  -20.33d {-20d 19' 35"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.09d {+13h 16m 22s}   -2.59d {-02d 35' 22"}
MOON_DIST:        29.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       25.99, 69.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      203.90, 34.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Nov 19 11:01:16 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     939079,   Seg_Num: 0
GRB_RA:          215.2622d {+14h 21m 02.92s} (J2000),
                 215.4901d {+14h 21m 57.62s} (current),
                 214.6893d {+14h 18m 45.44s} (1950)
GRB_DEC:         +22.8601d {+22d 51' 36.3"} (J2000),
                 +22.7698d {+22d 46' 11.2"} (current),
                 +23.0882d {+23d 05' 17.6"} (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:  18810 TJD;   327 DOY;   19/11/23
IMG_START_TIME:  38779.00 SOD {10:46:19.00} UT,   454.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       238.71d {+15h 54m 50s}  -20.33d {-20d 19' 34"}
SUN_DIST:         48.69 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      199.08d {+13h 16m 19s}   -2.58d {-02d 35' 00"}
MOON_DIST:        29.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       26.00, 69.28 [deg] galactic lon,lat of the burst
ECL_COORDS:      203.91, 34.61 [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 #26279
A. Tohuvavohu (U Toronto), J.D. Gropp (PSU), A. Y. Lien (GSFC/UMBC), K. L. Page (U Leicester) and B. Sbarufatti (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 10:38:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191123A (trigger=939079). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 215.261, +22.842 which is
```
   RA(J2000) = 14h 21m 03s
   Dec(J2000) = +22d 50' 30"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 150 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 10:39:54.1 UT, 69.8 seconds after the BAT trigger. The position determined from promptly downlinked data differs significantly from the on-board position, suggesting that the XRT may have centroided on a cosmic ray; the initial XRT position notice should be treated with caution. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 215.2619, 22.8600 which is equivalent to:
```
   RA(J2000)  = 14h 21m 02.87s
   Dec(J2000) = +22d 51' 36.0"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 64 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 (3.01 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 2.9 (+2.28/-2.01) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 78 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	14:21:02.87 = 215.26196
  DEC(J2000) = +22:51:36.3  =  22.86008
```
with a 90%-confidence error radius of about 0.75 arc sec. This position is 9.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.13 with a 1-sigma error of about 0.15. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.
Burst Advocate for this burst is A. Tohuvavohu (aaronb AT swift.psu.edu). 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 #26282
N. P. M. Kuin (UCL-MSSL) and A. Tohuvavohu (U Toronto) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191123A 78 s after the BAT trigger (Tohuvavohu et al., GCN Circ. 26279). A candidate optical afterglow was 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         78          228          147     18.26+-0.07
u_FC            290          540          246    >19.89
white           869         1019          147     19.28+-0.13
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #26283
```
TITLE:   GCN CIRCULAR 
NUMBER:  26283 
SUBJECT: GRB 191123A: iTelescope optical upper limits
DATE:    19/11/23 16:55:37 GMT
FROM:    Filipp Dmitrievich Romanov at Amateur astronomer 
```
I observed the field of GRB 191123A (Tohuvavohu et al., GCN Circular 26279) with remote telescope T21 (0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer) of iTelescope.Net in New Mexico Observatory. Two images with a luminance filter and with 120 seconds exposure time were obtained on 2019-11-23. Average time of images: 12:13:54 UT (5710 seconds after trigger; Binx1) and 12:16:38 UT (5874 seconds after trigger; Binx2). I did not detect any optical transients (magnitude limit of about 19.0 G from Gaia DR2 catalogue).
GCN Circular #26284
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 1802 s of XRT Photon Counting mode data and 1 UVOT images for GRB 191123A, 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 = 215.26186, +22.85991 which is equivalent to:
```
RA (J2000): 14h 21m 2.85s
Dec (J2000): +22d 51' 35.7"
```
with an uncertainty of 1.7 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 #26285
P.A. Evans (U. Leicester), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), B. Sbarufatti (PSU), D.N. Burrows (PSU), J. D. Gropp (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and A. Tohuvavohu report on behalf of the Swift-XRT team:
We have analysed 6.2 ks of XRT data for GRB 191123A (Tohuvavohu et al. GCN Circ. 26279), from 76 s to 18.5 ks after the BAT trigger. The data comprise 540 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 26284).
The late-time light curve (from T0+5.6 ks) can be modelled with a power-law decay with a decay index of alpha=1.00 (+/-0.15).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.52 (+/-0.05). The best-fitting absorption column is 6.7 (+1.6, -1.5) x 10^20 cm^-2, in excess of the Galactic value of 3.0 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.98 (+0.12, -0.11) and a best-fitting absorption column of 4.8 (+2.6, -1.8) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.3 x 10^-11 (3.7 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.8 (+2.6, -1.8) x 10^20 cm^-2
Galactic foreground: 3.0 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.98 (+0.12, -0.11)
```
If the light curve continues to decay with a power-law decay index of 1.00, the count rate at T+24 hours will be 0.022 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.2 x 10^-13 (8.1 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00939079.
This circular is an official product of the Swift-XRT team.
GCN Circular #26286
S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), A. Tohuvavohu (U Toronto), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191123A (trigger #939079) (Tohuvavohu, et al., GCN Circ. 26279). The BAT ground-calculated position is RA, Dec = 215.289, 22.823 deg which is
```
  RA(J2000)  =  14h 21m 09.3s 
  Dec(J2000) = +22d 49' 23.5" 
```
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 85%.
The mask-weighted light curve shows a pair of pulses, each with some sub- structure. The first starts at ~T-10 sec, peaks at T+0 and decays by T+40 sec. The second pulse starts at T+110 sec, peaks soon afterward and decays by T+180 sec. T90 (15-350 keV) is 275.1 +- 102.4 sec (estimated error including systematics).
The time-averaged spectrum from -2.1 to 288.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.67 +- 0.25. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+111.77 sec in the 15-150 keV band is 1.2 +- 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/939079/BA/
GCN Circular #26287
N. P. M. Kuin (UCL-MSSL) and A. Tohuvavohu (U. Toronto) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191123A 78 s after the BAT trigger (Tohuvavohu et al., GCN Circ. 26279). A source consistent with the XRT position (Goad et al. GCN Circ. 26284) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  14:21:02.88 = 215.26200 (deg.)
    Dec (J2000) = +22:51:36.1  =  22.86002 (deg.)
```
with an estimated uncertainty of 0.44 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white               78          228          147         18.25 +/- 0.05
v                  620         2111          175         18.28 +/- 0.19
b                  546         1168           58         19.18 +/- 0.25
u                  290         6376          501        >20.4
w1                 669         6171          372        >19.9
m2                1074         5966          216        >19.8
w2                 595        12186          944        >20.9
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).

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Jochen Greiner, last update: 24-Nov-2019 [Disclaimer]