Gamma-ray Burst 221202A

(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 02 Dec 22 20:06:47 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1142997,   Seg_Num: 0
GRB_RA:           77.095d {+05h 08m 23s} (J2000),
                  77.175d {+05h 08m 42s} (current),
                  76.921d {+05h 07m 41s} (1950)
GRB_DEC:         -59.806d {-59d 48' 21"} (J2000),
                 -59.778d {-59d 46' 39"} (current),
                 -59.869d {-59d 52' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7183 [cnts]    Image_Peak=246 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   298     E_range: 25-100 keV
BKG_INTEN:       59427 [cnts]
BKG_TIME:        72313.67 SOD {20:05:13.67} UT
BKG_DUR:         40 [sec]
GRB_DATE:        19915 TJD;   336 DOY;   22/12/02
GRB_TIME:        72370.57 SOD {20:06:10.57} UT
GRB_PHI:         -73.84 [deg]
GRB_THETA:        14.09 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.61 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  -2  +0  +0 +13  +0 
SUN_POSTN:       249.03d {+16h 36m 07s}  -22.04d {-22d 02' 10"}
SUN_DIST:         97.91 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.10d {+00h 36m 24s}   +0.64d {+00d 38' 09"}
MOON_DIST:        79.73 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.86,-36.06 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       43.33,-81.12 [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 = 97.94,-20.39 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:07:54 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.819d {-59d 49' 06"} (J2000)
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72468.20 SOD {20:07:48.20} UT,   97.6 [sec] since BAT Trigger Time
COUNTS:          11    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:     Fri 02 Dec 22 20:09:51 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1142997,   Seg_Num: 0
GRB_RA:           77.095d {+05h 08m 23s} (J2000),
                  77.175d {+05h 08m 42s} (current),
                  76.921d {+05h 07m 41s} (1950)
GRB_DEC:         -59.806d {-59d 48' 21"} (J2000),
                 -59.778d {-59d 46' 39"} (current),
                 -59.869d {-59d 52' 06"} (1950)
GRB_DATE:        19915 TJD;   336 DOY;   22/12/02
GRB_TIME:        72370.57 SOD {20:06:10.57} UT
TRIGGER_INDEX:   298
GRB_PHI:         -73.84 [deg]
GRB_THETA:        14.09 [deg]
DELTA_TIME:      71.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.61 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
LC_URL:          sw01142997000msb.lc
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 11"}
SUN_DIST:         97.91 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.13d {+00h 36m 30s}   +0.65d {+00d 38' 56"}
MOON_DIST:        79.73 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.86,-36.06 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       43.33,-81.12 [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 = 97.94,-20.39 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:10:41 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.819d {-59d 49' 06"} (J2000)
POINT_ROLL:      172.382d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72471.61 SOD {20:07:51.61} UT,   101.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.325
N_STARS:         61
X_OFFSET:        436 [pixels]
Y_OFFSET:        669 [pixels]
X_MAX:           1395 [pixels]
Y_MAX:           1628 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw01142997000msufc0101.fits
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 11"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.13d {+00h 36m 32s}   +0.65d {+00d 39' 09"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.35,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:10:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.819d {-59d 49' 06"} (J2000)
POINT_ROLL:      172.382d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72471.61 SOD {20:07:51.61} UT,   101.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.325
N_STARS:         61
X_OFFSET:        436 [pixels]
Y_OFFSET:        669 [pixels]
X_MAX:           1395 [pixels]
Y_MAX:           1628 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw01142997000msufc0101.fits
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 11"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.13d {+00h 36m 32s}   +0.65d {+00d 39' 13"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.35,-81.13 [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 02 Dec 22 20:11:37 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     1142997,   Seg_Num: 0
GRB_RA:           77.0844d {+05h 08m 20.25s} (J2000),
                  77.1642d {+05h 08m 39.40s} (current),
                  76.9111d {+05h 07m 38.67s} (1950)
GRB_DEC:         -59.8317d {-59d 49' 54.1"} (J2000),
                 -59.8033d {-59d 48' 11.7"} (current),
                 -59.8943d {-59d 53' 39.6"} (1950)
GRB_ERROR:       4.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72495.00 SOD {20:08:15.00} UT,   124.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 11"}
SUN_DIST:         97.89 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.14d {+00h 36m 34s}   +0.66d {+00d 39' 24"}
MOON_DIST:        79.73 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.89,-36.07 [deg] galactic lon,lat of the burst
ECL_COORDS:       43.21,-81.13 [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 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:12:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.819d {-59d 49' 06"} (J2000)
ROLL:            172.382d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72471.61 SOD {20:07:51.61} UT,   101.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     691704501
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0132.fits
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 11"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.14d {+00h 36m 35s}   +0.66d {+00d 39' 30"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.35,-81.13 [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 02 Dec 22 20:12:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.819d {-59d 49' 06"} (J2000)
ROLL:            172.382d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72471.61 SOD {20:07:51.61} UT,   101.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     691704501
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0132.fits
SUN_POSTN:       249.03d {+16h 36m 08s}  -22.04d {-22d 02' 12"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.15d {+00h 36m 35s}   +0.66d {+00d 39' 32"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      73 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.35,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #33004
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev (Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB221202.84 (trigger No 1142997,05h 08m 22.80s , -59d 48m 21.6s, R=0.05) errorbox 25 sec after notice time and 64 sec after trigger time at 2022-12-02 20:07:14 UT, with upper limit up to 15.8 mag. The observations began at zenith distance = 40 deg. The sun altitude is -26.3 deg.
The galactic latitude b = -36 deg., longitude l = 269 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2172831
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      69 |         MASTER-SAAO |  P/ |    10 | 15.8 |        
```
The observation and reduction will continue. The message may be cited.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:17:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
POINT_ROLL:      172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72630.00 SOD {20:10:30.00} UT,   259.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.396
N_STARS:         146
X_OFFSET:        196 [pixels]
Y_OFFSET:        429 [pixels]
X_MAX:           1635 [pixels]
Y_MAX:           1868 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw01142997000msufc0259.fits
SUN_POSTN:       249.04d {+16h 36m 09s}  -22.04d {-22d 02' 14"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.19d {+00h 36m 46s}   +0.68d {+00d 40' 60"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:18:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
POINT_ROLL:      172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72630.00 SOD {20:10:30.00} UT,   259.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.396
N_STARS:         146
X_OFFSET:        196 [pixels]
Y_OFFSET:        429 [pixels]
X_MAX:           1635 [pixels]
Y_MAX:           1868 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw01142997000msufc0259.fits
SUN_POSTN:       249.04d {+16h 36m 09s}  -22.04d {-22d 02' 14"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.19d {+00h 36m 46s}   +0.68d {+00d 41' 03"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [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 02 Dec 22 20:18:15 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1142997,   Seg_Num: 0
GRB_RA:           77.0830d {+05h 08m 19.91s} (J2000),
                  77.1628d {+05h 08m 39.07s} (current),
                  76.9097d {+05h 07m 38.33s} (1950)
GRB_DEC:         -59.8321d {-59d 49' 55.5"} (J2000),
                 -59.8037d {-59d 48' 13.1"} (current),
                 -59.8947d {-59d 53' 41.0"} (1950)
GRB_ERROR:       1.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72495.00 SOD {20:08:15.00} UT,   124.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       249.04d {+16h 36m 09s}  -22.04d {-22d 02' 14"}
SUN_DIST:         97.89 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.19d {+00h 36m 47s}   +0.68d {+00d 41' 05"}
MOON_DIST:        79.73 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.89,-36.07 [deg] galactic lon,lat of the burst
ECL_COORDS:       43.20,-81.13 [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 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:18:58 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
ROLL:            172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72630.00 SOD {20:10:30.00} UT,   259.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     691704660
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0290.fits
SUN_POSTN:       249.04d {+16h 36m 09s}  -22.04d {-22d 02' 14"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.20d {+00h 36m 48s}   +0.69d {+00d 41' 16"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [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 02 Dec 22 20:19:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
ROLL:            172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  72630.00 SOD {20:10:30.00} UT,   259.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     691704660
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0290.fits
SUN_POSTN:       249.04d {+16h 36m 09s}  -22.04d {-22d 02' 14"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.20d {+00h 36m 48s}   +0.69d {+00d 41' 18"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command. 
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #33005
R. Caputo (GSFC), M. G. Bernardini (INAF-OAB), R. Brivio (INAF-OAB), P. D'Avanzo (INAF-OAB), S. Dichiara (PSU), R. A. J. Eyles-Ferris (U Leicester), M. Ferro (INAF-OAB), J.D. Gropp (PSU), N. J. Klingler (GSFC/UMBC/CRESSTII), H. A. Krimm (NSF), A. Y. Lien (U Tampa), K. L. Page (U Leicester), D. M. Palmer (LANL), T. M. Parsotan (GSFC/UMBC/CRESSTII), C. Salvaggio (INAF-OAB), A. Tohuvavohu (U Toronto) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 20:06:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 221202A (trigger=1142997). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 77.095, -59.806 which is
```
   RA(J2000) = 05h 08m 23s
   Dec(J2000) = -59d 48' 21"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 20 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 20:07:48.2 UT, 97.6 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 77.08221, -59.83213 which is equivalent to:
```
   RA(J2000)  = 05h 08m 19.73s
   Dec(J2000) = -59d 49' 55.7"
```
with an uncertainty of 1.9 arcseconds (radius, 90% containment). This location is 96 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 https://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 2.11 x 10^20 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 101 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.027.
Burst Advocate for this burst is R. Caputo (regina.caputo AT 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:     Fri 02 Dec 22 20:24:11 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
POINT_ROLL:      172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  73232.54 SOD {20:20:32.54} UT,   862.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.659
N_STARS:         113
X_OFFSET:        196 [pixels]
Y_OFFSET:        429 [pixels]
X_MAX:           1635 [pixels]
Y_MAX:           1868 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw01142997000msufc0861.fits
SUN_POSTN:       249.04d {+16h 36m 10s}  -22.04d {-22d 02' 16"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.24d {+00h 36m 58s}   +0.71d {+00d 42' 37"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Dec 22 20:24:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
POINT_ROLL:      172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  73232.54 SOD {20:20:32.54} UT,   862.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.659
N_STARS:         113
X_OFFSET:        196 [pixels]
Y_OFFSET:        429 [pixels]
X_MAX:           1635 [pixels]
Y_MAX:           1868 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw01142997000msufc0861.fits
SUN_POSTN:       249.04d {+16h 36m 10s}  -22.04d {-22d 02' 16"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.25d {+00h 36m 59s}   +0.71d {+00d 42' 41"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [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 02 Dec 22 20:27:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
ROLL:            172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  73232.54 SOD {20:20:32.54} UT,   862.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     691705262
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0892.fits
SUN_POSTN:       249.04d {+16h 36m 11s}  -22.04d {-22d 02' 17"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.27d {+00h 37m 04s}   +0.72d {+00d 43' 21"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [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 02 Dec 22 20:27:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1142997,   Seg_Num: 0
POINT_RA:         77.121d {+05h 08m 29s} (J2000)
POINT_DEC:       -59.817d {-59d 49' 01"} (J2000)
ROLL:            172.384d
IMG_START_DATE:  19915 TJD;   336 DOY;   22/12/02
IMG_START_TIME:  73232.54 SOD {20:20:32.54} UT,   862.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     691705262
X_OFFSET:        755 [pixels]
Y_OFFSET:        988 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       915
Y_GRB_POS:       1148
BINNING_INDEX:   1
IM_URL:          sw01142997000msuni0892.fits
SUN_POSTN:       249.05d {+16h 36m 11s}  -22.04d {-22d 02' 17"}
SUN_DIST:         97.90 [deg]   Sun_angle= 11.5 [hr] (West of Sun)
MOON_POSTN:        9.27d {+00h 37m 04s}   +0.72d {+00d 43' 23"}
MOON_DIST:        79.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      268.87,-36.05 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       43.36,-81.13 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #33007
S. de Wet (UCT) and P.J. Groot (Radboud/UCT/SAAO) report on behalf of the MeerLICHT consortium:
Following the detection by Swift of GRB 221202A and its X-ray counterpart (Caputo et al., GCN 33005), the 0.6m wide-field MeerLICHT telescope, located at Sutherland, South Africa, obtained 5x300s observations in the q,z,i,r,g bands beginning at 21:14:34 UT on 2022 December 2, approximately 1.14 hours after the Swift trigger.
We detect no new source at the XRT position (Caputo et al., GCN 33005) in any of our images down to the following 3-sigma upper limits, in the AB magnitude system:
```
q > 21.80 at 21:17:27 UT
z > 20.01 at 21:22:34 UT
i > 21.02 at 21:28:03 UT
r > 21.53 at 21:33:25 UT
g > 21.58 at 21:38:54 UT
```
MeerLICHT is built and run by a consortium consisting of Radboud University, University of Cape Town, the South African Astronomical Observatory, the University of Oxford, the University of Manchester and the University of Amsterdam.
GCN Circular #33008
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 864 s of XRT Photon Counting mode data and 1 UVOT images for GRB 221202A, 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 = 77.08299, -59.83246 which is equivalent to:
```
RA (J2000): 05h 08m 19.92s
Dec (J2000): -59d 49' 56.9"
```
with an uncertainty of 2.2 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #33009
R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on behalf of a larger collaboration:
We observed the GRB 221202A (Caputo et al., GCN 33005) field with the LCOGT 1-meter Sinistro instrument at the South African Astronomical Observatory site, on December 2, from 21:09 to 21:36 (corresponding to 1.05 to 1.5 hours from the GRB trigger time) with the Bessel R and I filters.
We performed a series of 3x280s exposures in each band. We do not detect any sources in the XRT error region, in either band, consistent with other optical upper limits (de Wet et al., GCN 33007).
The following upper limits are calculated using the USNO-B.1 catalog as reference:
```
R > 20.0
I > 19.0
```
These magnitudes are not corrected for galactic extinction.
GCN Circular #33010
P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp (PSU) and R. Caputo report on behalf of the Swift-XRT team:
We have analysed 6.1 ks of XRT data for GRB 221202A (Caputo et al. GCN Circ. 33005), from 82 s to 27.6 ks after the BAT trigger. The data comprise 185 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 33008).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.45 (+0.08, -0.07).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.25 (+0.11, -0.10). The best-fitting absorption column is 3.94 (+0.29, -0.28) x 10^21 cm^-2, in excess of the Galactic value of 2.1 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.77 (+0.32, -0.29) and a best-fitting absorption column of 2.1 (+0.8, -0.7) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 2.5 x 10^-11 (5.3 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.1 (+0.8, -0.7) x 10^21 cm^-2
Galactic foreground: 2.1 x 10^20 cm^-2
Excess significance: 4.6 sigma
Photon index:	     2.77 (+0.32, -0.29)
```
If the light curve continues to decay with a power-law decay index of 1.45, the count rate at T+24 hours will be 4.0 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.0 x 10^-14 (2.1 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01142997.
This circular is an official product of the Swift-XRT team.
GCN Circular #33014
A. Rossi (INAF), G. Pugliese (API, Amsterdam university), D. A. Kann (Goethe Univ.), B. Schneider (CEA Paris-Saclay), and V. D'Elia (INAF/OAR and ASI/SSDC) report on behalf of the Stargate collaboration:
We performed photometric observations of the afterglow of GRB 221202A detected by the Swift Burst Alert Telescope (BAT) at 20:06:10.56 UT (Caputo et al., GCN 33005; De Wet et al., GCN 33007; Beardmore et al., GCN 33008;� Strausbaugh et al., GCN 33009; Evans et al., GCN 33010) with the FORS2 instrument at the ESO VLT-UT1 in the R_Special, I_Bessel and z_Gunn filters (in the following RIz). The observation started at 06:50:29 UT (about 10.73 hours after the BAT detection), and consisted of 500 s in R, 800 s in I, and 1320 s in z.
We detect a source in the XRT error circle in all filters at position RA, Dec. (J2000) = 05:08:19.94,-59:49:58.6, astrometrized against Gaia DR3 field stars. We measure the following photometry, consistent with the upper limits of MeerLICHT (S. de Wet et al., GCN 33007) and LCOGT (R. Strausbaugh et al., GCN 33009):
```
R = 23.10 +/- 0.05 mag,
I = 22.68 +/- 0.06 mag,
z = 22.52 +/- 0.07 mag.
```
Magnitudes are calibrated against SkyMapper field stars and are in the AB system. For the R and I bands we use the Lupton formulas to convert the standard stars to the BVRI photometric system, then convert the measured magnitudes back to the AB system.
A source at the same position is visible in r'-band images downloaded and stacked from the Legacy Imaging Survey, with r' ~ 24.3 mag (AB). Therefore, we conclude that the detected source is dominated by the afterglow of GRB 221202A and slightly contaminated by the GRB host galaxy. We derive an X-ray to optical slope beta_OX ~ 0.8, therefore the afterglow is not dark, just faint.
We acknowledge the support provided by T. C. Emy and the Paranal staff, in particular Ana Escorza, Ricardo Arrue, Marcela Espinoza, and Michael Abdul-Masih.
GCN Circular #33015
S. D. Barthelmy (GSFC), H. A. Krimm (NSF),
S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),
C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),
M. Stamatikos (OSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 221202A (trigger #1142997)
(Caputo et al. GCN Circ. 33005). The BAT ground-calculated position is
RA, Dec = 77.002, -59.836 deg which is
RA(J2000) = 05h 08m 00.5s
Dec(J2000) = -59d 50' 09.0"
with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 85%.
The mask-weighted light curve shows a single peaked pulse.
T90 (15-350 keV) is 10.34 +- 1.21 sec (estimated error including systematics).
The time-averaged spectrum from T+1.03 to T+12.44 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.64 +- 0.25. The fluence in the 15-150 keV band is 3.2 +- 0.6 x 10^-07 erg/cm2.
The 1-sec peak photon flux measured from T+3.31 sec in the 15-150 keV band
is 0.7 +- 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/1142997/BA/
GCN Circular #33016
Paul Kuin (MSSL-UCL) and R. Caputo (GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 221202A 102 s after the BAT trigger (Caputo et al., GCN Circ. 33005). A source consistent with the XRT position (Beardmore et al. GCN Circ. 33008) is detected in the initial UVOT exposures.
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              102          733          186         20.66 +/- 0.20
v                  590         4820          216        >19.9
b                  516          709           39        >19.8
u                  260          857          285        >19.7
w1                 640          832           39        >20.8
m2                 615          808           39        >18.1
w2                 566         4635          235        >20.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.027 in the direction of the burst (Schlegel et al. 1998).

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Jochen Greiner, last update: 04-Dez-2022 [Disclaimer]