Gamma-ray Burst 220118A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:20:56 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.274d {+12h 49m 06s} (J2000),
                 192.546d {+12h 50m 11s} (current),
                 191.658d {+12h 46m 38s} (1950)
GRB_DEC:         +22.909d {+22d 54' 33"} (J2000),
                 +22.789d {+22d 47' 22"} (current),
                 +23.182d {+23d 10' 54"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2456 [cnts]    Image_Peak=98 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   151     E_range: 25-100 keV
BKG_INTEN:       14413 [cnts]
BKG_TIME:        66019.53 SOD {18:20:19.53} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66038.09 SOD {18:20:38.09} UT
GRB_PHI:          37.14 [deg]
GRB_THETA:        42.82 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     16.40 [sigma]
IMAGE_SIGNIF:    7.36 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -3  +0  +0 +41  +0 
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 47"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.06d {+08h 44m 13s}  +22.92d {+22d 55' 13"}
MOON_DIST:        56.21 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.58, 25.79 [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 = 216.47,-10.67 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=664222840).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:21:00 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     664222840
GRB_RA:          191.767d {+12h 47m 04s} (J2000),
                 192.031d {+12h 48m 07s} (current),
                 191.166d {+12h 44m 40s} (1950)
GRB_DEC:         +35.583d {+35d 34' 60"} (J2000),
                 +35.463d {+35d 27' 47"} (current),
                 +35.856d {+35d 51' 22"} (1950)
GRB_ERROR:       7.93 [deg radius, statistical plus systematic]
GRB_INTEN:       238 [cnts/sec]
DATA_SIGNIF:     11.60 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66035.84 SOD {18:20:35.84} UT
GRB_PHI:         258.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.38
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,1,1, 0,0,0, 0,0,
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 47"}
SUN_DIST:        116.59 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.06d {+08h 44m 13s}  +22.92d {+22d 55' 12"}
MOON_DIST:        53.85 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      128.95, 81.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      174.31, 36.86 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 158.90,25.58 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=1093742).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:21:10 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      58
TRIGGER_NUM:     664222840
GRB_RA:          191.883d {+12h 47m 32s} (J2000),
                 192.148d {+12h 48m 35s} (current),
                 191.283d {+12h 45m 08s} (1950)
GRB_DEC:         +35.583d {+35d 34' 60"} (J2000),
                 +35.463d {+35d 27' 48"} (current),
                 +35.856d {+35d 51' 22"} (1950)
GRB_ERROR:       7.63 [deg radius, statistical plus systematic]
GRB_INTEN:       194 [cnts/sec]
DATA_SIGNIF:     19.80 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66035.84 SOD {18:20:35.84} UT
GRB_PHI:         258.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.76
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,1,1, 0,0,0, 0,0,
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        116.50 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.06d {+08h 44m 14s}  +22.92d {+22d 55' 11"}
MOON_DIST:        53.94 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      128.31, 81.50 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      174.42, 36.90 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 158.90,25.58 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=1093742).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:21:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     664222840
GRB_RA:          189.550d {+12h 38m 12s} (J2000),
                 189.820d {+12h 39m 17s} (current),
                 188.936d {+12h 35m 45s} (1950)
GRB_DEC:         +30.550d {+30d 33' 00"} (J2000),
                 +30.429d {+30d 25' 44"} (current),
                 +30.825d {+30d 49' 29"} (1950)
GRB_ERROR:       3.22 [deg radius, statistical only]
DATA_SIGNIF:     19.50 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66035.84 SOD {18:20:35.84} UT
GRB_PHI:         255.00 [deg]
GRB_THETA:        45.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        117.75 [deg]   Sun_angle= 7.4 [hr] (West of Sun)
MOON_POSTN:      131.06d {+08h 44m 14s}  +22.92d {+22d 55' 11"}
MOON_DIST:        52.48 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      162.42, 85.52 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      175.21, 31.55 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_664222840.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=1093742).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:22:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     664222840
GRB_RA:          191.390d {+12h 45m 34s} (J2000),
                 191.661d {+12h 46m 39s} (current),
                 190.774d {+12h 43m 06s} (1950)
GRB_DEC:         +24.580d {+24d 34' 48"} (J2000),
                 +24.460d {+24d 27' 35"} (current),
                 +24.853d {+24d 51' 12"} (1950)
GRB_ERROR:       2.64 [deg radius, statistical only]
DATA_SIGNIF:     23.70 [sigma]
DATA_INTERVAL:   11.264 [sec]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66035.84 SOD {18:20:35.84} UT
GRB_PHI:         257.00 [deg]
GRB_THETA:        51.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        115.07 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
MOON_POSTN:      131.07d {+08h 44m 17s}  +22.92d {+22d 55' 02"}
MOON_DIST:        55.05 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      275.18, 87.13 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      179.96, 26.94 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_664222840.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=1093742).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:29:59 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     664222840
GRB_RA:          191.370d {+12h 45m 29s} (J2000),
                 191.642d {+12h 46m 34s} (current),
                 190.753d {+12h 43m 01s} (1950)
GRB_DEC:         +23.580d {+23d 34' 48"} (J2000),
                 +23.460d {+23d 27' 35"} (current),
                 +23.853d {+23d 51' 12"} (1950)
GRB_ERROR:       5.03 [deg radius, statistical only]
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66035.84 SOD {18:20:35.84} UT
GRB_PHI:         257.00 [deg]
GRB_THETA:        52.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 42"}
SUN_DIST:        114.87 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
MOON_POSTN:      131.14d {+08h 44m 33s}  +22.90d {+22d 54' 10"}
MOON_DIST:        55.18 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      281.84, 86.21 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      180.42, 26.03 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_locplot_all_bn220118764.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=1093742).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:22:46 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.2676d {+12h 49m 04.2s} (J2000),
                 192.5390d {+12h 50m 09.3s} (current),
                 191.6516d {+12h 46m 36.3s} (1950)
GRB_DEC:         +22.9184d {+22d 55' 06.2"} (J2000),
                 +22.7985d {+22d 47' 54.6"} (current),
                 +23.1908d {+23d 11' 26.7"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       26 [cnts]
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66128.39 SOD {18:22:08.39} UT,   90.3 [sec] since BAT Trigger Time
CENTROID_X:      319.11,  raw= 319  [pixels]
CENTROID_Y:      300.43,  raw= 300  [pixels]
ROLL:            103.08 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   5.50
GRB_POS_XRT_Z:   27.62
IMAGE_URL:       sw01093742000msxps_rw.img
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.07d {+08h 44m 17s}  +22.92d {+22d 55' 00"}
MOON_DIST:        56.19 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.55, 85.76 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.57, 25.79 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:22:44 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.2676d {+12h 49m 04.2s} (J2000),
                 192.5390d {+12h 50m 09.3s} (current),
                 191.6516d {+12h 46m 36.3s} (1950)
GRB_DEC:         +22.9184d {+22d 55' 06.2"} (J2000),
                 +22.7985d {+22d 47' 54.6"} (current),
                 +23.1908d {+23d 11' 26.7"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       26 [cnts]
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66128.39 SOD {18:22:08.39} UT,   90.3 [sec] since BAT Trigger Time
CENTROID_X:      319.11,  raw= 319  [pixels]
CENTROID_Y:      300.43,  raw= 300  [pixels]
ROLL:            103.08 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   5.50
GRB_POS_XRT_Z:   27.62
IMAGE_URL:       sw01093742000msxps_rw.img
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.07d {+08h 44m 17s}  +22.92d {+22d 55' 00"}
MOON_DIST:        56.19 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.55, 85.76 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.57, 25.79 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:22:34 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.2676d {+12h 49m 04.22s} (J2000),
                 192.5390d {+12h 50m 09.35s} (current),
                 191.6516d {+12h 46m 36.39s} (1950)
GRB_DEC:         +22.9184d {+22d 55' 06.2"} (J2000),
                 +22.7985d {+22d 47' 54.6"} (current),
                 +23.1908d {+23d 11' 26.7"} (1950)
GRB_ERROR:       6.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       4.57e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.09 [sigma]
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66128.39 SOD {18:22:08.39} UT,   90.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.17 261.64 243.21
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 46"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.07d {+08h 44m 17s}  +22.92d {+22d 55' 02"}
MOON_DIST:        56.19 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.55, 85.76 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.57, 25.79 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.66 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:24:23 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.274d {+12h 49m 06s} (J2000),
                 192.546d {+12h 50m 11s} (current),
                 191.658d {+12h 46m 38s} (1950)
GRB_DEC:         +22.909d {+22d 54' 33"} (J2000),
                 +22.789d {+22d 47' 22"} (current),
                 +23.182d {+23d 10' 54"} (1950)
GRB_DATE:        19597 TJD;    18 DOY;   22/01/18
GRB_TIME:        66038.09 SOD {18:20:38.09} UT
TRIGGER_INDEX:   151
GRB_PHI:          37.14 [deg]
GRB_THETA:        42.82 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.40 [sigma]
IMAGE_SIGNIF:    7.36 [sigma]
LC_URL:          sw01093742000msb.lc
SUN_POSTN:       300.76d {+20h 03m 03s}  -20.43d {-20d 25' 45"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.09d {+08h 44m 21s}  +22.91d {+22d 54' 49"}
MOON_DIST:        56.18 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.58, 25.79 [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 = 216.47,-10.67 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:26:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.915d {+22d 54' 52"} (J2000)
POINT_ROLL:      103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66137.33 SOD {18:22:17.33} UT,   99.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.214
N_STARS:         11
X_OFFSET:        496 [pixels]
Y_OFFSET:        600 [pixels]
X_MAX:           1455 [pixels]
Y_MAX:           1559 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    13
SL_URL:          sw01093742000msufc0099.fits
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 44"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.11d {+08h 44m 26s}  +22.91d {+22d 54' 33"}
MOON_DIST:        56.17 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.79 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN Circular #31489
The Fermi GBM team reports the detection of a likely LONG GRB
At 18:20:35 UT on 18 Jan 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220118A (trigger 664222840.838306 / 220118764).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 191.4, Dec = 23.6 (J2000 degrees, equivalent to J2000 12h 45m, 23d 36'), with a statistical uncertainty of 5.0 degrees.
The angle from the Fermi LAT boresight is 52.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_skymap_all_bn220118764.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_healpix_all_bn220118764.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220118764/quicklook/glg_lc_medres34_bn220118764.gif

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:33:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.917d {+22d 55' 01"} (J2000)
POINT_ROLL:      103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66295.22 SOD {18:24:55.22} UT,   257.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.456
N_STARS:         10
X_OFFSET:        426 [pixels]
Y_OFFSET:        585 [pixels]
X_MAX:           1385 [pixels]
Y_MAX:           1544 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01093742000msufc0257.fits
SUN_POSTN:       300.77d {+20h 03m 05s}  -20.43d {-20d 25' 40"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.17d {+08h 44m 41s}  +22.90d {+22d 53' 45"}
MOON_DIST:        56.11 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.66, 85.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.80 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:33:43 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.917d {+22d 55' 01"} (J2000)
POINT_ROLL:      103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66295.22 SOD {18:24:55.22} UT,   257.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.456
N_STARS:         10
X_OFFSET:        426 [pixels]
Y_OFFSET:        585 [pixels]
X_MAX:           1385 [pixels]
Y_MAX:           1544 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01093742000msufc0257.fits
SUN_POSTN:       300.77d {+20h 03m 05s}  -20.43d {-20d 25' 40"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.17d {+08h 44m 41s}  +22.90d {+22d 53' 44"}
MOON_DIST:        56.11 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.66, 85.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.80 [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:     Tue 18 Jan 22 18:34:55 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.917d {+22d 55' 01"} (J2000)
ROLL:            103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66295.22 SOD {18:24:55.22} UT,   257.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     664223123
X_OFFSET:        746 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       906
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw01093742000msuni0286.fits
SUN_POSTN:       300.77d {+20h 03m 05s}  -20.43d {-20d 25' 39"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.18d {+08h 44m 44s}  +22.89d {+22d 53' 35"}
MOON_DIST:        56.10 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.66, 85.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.80 [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:     Tue 18 Jan 22 18:35:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.917d {+22d 55' 01"} (J2000)
ROLL:            103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66295.22 SOD {18:24:55.22} UT,   257.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     664223123
X_OFFSET:        746 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       906
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw01093742000msuni0286.fits
SUN_POSTN:       300.77d {+20h 03m 05s}  -20.43d {-20d 25' 39"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.18d {+08h 44m 44s}  +22.89d {+22d 53' 33"}
MOON_DIST:        56.10 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.66, 85.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.80 [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 Circular #31490
N. J. Klingler (GSFC/UMBC/CRESSTII), E. Ambrosi (INAF-IASFPA), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC & INAF-OAR), S. Dichiara (PSU), J.D. Gropp (PSU), H. A. Krimm (NSF), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), T. M. Parsotan (GSFC/UMBC/CRESSTII), B. Sbarufatti (PSU) and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 18:20:38 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 220118A (trigger=1093742). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 192.274, +22.909 which is
```
   RA(J2000) = 12h 49m 06s
   Dec(J2000) = +22d 54' 33"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 20 sec. The peak count rate was ~1400 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 18:22:08.3 UT, 90.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 192.26936, 22.91600 which is equivalent to:
```
   RA(J2000)  = 12h 49m 04.65s
   Dec(J2000) = +22d 54' 57.6"
```
with an uncertainty of 3.5 arcseconds (radius, 90% containment). This location is 29 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 in excess of the Galactic value (2.25 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 3.4 (+2.60/-2.24) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 4.57e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 99 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	12:49:04.53 = 192.26888
  DEC(J2000) = +22:54:56.2  =  22.91562
```
with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.8 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.83 with a 1-sigma error of about 0.15. No correction has been made for the expected extinction corresponding to E(B-V) of 0.025.
Burst Advocate for this burst is N. J. Klingler (noelklin AT umbc.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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:28:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.915d {+22d 54' 52"} (J2000)
ROLL:            103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66137.33 SOD {18:22:17.33} UT,   99.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     664222965
X_OFFSET:        746 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       906
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw01093742000msuni0128.fits
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 42"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.13d {+08h 44m 31s}  +22.90d {+22d 54' 17"}
MOON_DIST:        56.15 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.79 [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:     Tue 18 Jan 22 18:29:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.915d {+22d 54' 52"} (J2000)
ROLL:            103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66137.33 SOD {18:22:17.33} UT,   99.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     664222965
X_OFFSET:        746 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       906
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw01093742000msuni0128.fits
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 42"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.13d {+08h 44m 31s}  +22.90d {+22d 54' 16"}
MOON_DIST:        56.15 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.79 [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:     Tue 18 Jan 22 18:26:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1093742,   Seg_Num: 0
POINT_RA:        192.276d {+12h 49m 06s} (J2000)
POINT_DEC:       +22.915d {+22d 54' 52"} (J2000)
POINT_ROLL:      103.076d
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66137.33 SOD {18:22:17.33} UT,   99.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.214
N_STARS:         11
X_OFFSET:        496 [pixels]
Y_OFFSET:        600 [pixels]
X_MAX:           1455 [pixels]
Y_MAX:           1559 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    13
SL_URL:          sw01093742000msufc0099.fits
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 43"}
SUN_DIST:        113.91 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.11d {+08h 44m 26s}  +22.91d {+22d 54' 31"}
MOON_DIST:        56.16 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.65, 85.75 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      181.58, 25.79 [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:     Tue 18 Jan 22 18:30:12 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.2688d {+12h 49m 04.51s} (J2000),
                 192.5402d {+12h 50m 09.64s} (current),
                 191.6528d {+12h 46m 36.67s} (1950)
GRB_DEC:         +22.9156d {+22d 54' 56.1"} (J2000),
                 +22.7957d {+22d 47' 44.5"} (current),
                 +23.1880d {+23d 11' 16.6"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         17.82 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66134.00 SOD {18:22:14.00} UT,   95.9 [sec] since BAT Trigger Time
SUN_POSTN:       300.77d {+20h 03m 04s}  -20.43d {-20d 25' 42"}
SUN_DIST:        113.92 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.14d {+08h 44m 33s}  +22.90d {+22d 54' 08"}
MOON_DIST:        56.13 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.57, 85.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      181.57, 25.79 [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 10.8 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 Jan 22 18:45:50 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1093742,   Seg_Num: 0
GRB_RA:          192.2694d {+12h 49m 04.65s} (J2000),
                 192.5408d {+12h 50m 09.79s} (current),
                 191.6534d {+12h 46m 36.82s} (1950)
GRB_DEC:         +22.9164d {+22d 54' 59.0"} (J2000),
                 +22.7965d {+22d 47' 47.4"} (current),
                 +23.1888d {+23d 11' 19.5"} (1950)
GRB_ERROR:       3.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19597 TJD;    18 DOY;   22/01/18
IMG_START_TIME:  66169.00 SOD {18:22:49.00} UT,   130.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       300.78d {+20h 03m 07s}  -20.43d {-20d 25' 34"}
SUN_DIST:        113.93 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      131.28d {+08h 45m 07s}  +22.87d {+22d 52' 19"}
MOON_DIST:        56.01 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      295.57, 85.75 [deg] galactic lon,lat of the burst
ECL_COORDS:      181.57, 25.79 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN Circular #31491
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov, D. Cheryasov (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),
B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH)
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the Swift GRB 220118A ( N. J. Klingler et al., GCN 31490) errorbox 4483 sec after notice time and 4505 sec after trigger time at 2022-01-18 19:35:43 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 29 deg. The sun altitude is -35.6 deg.
The galactic latitude b = 86 deg., longitude l = 303 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1853598
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    4595 |         MASTER-Amur |   C |   180 | 14.5 |        
    5133 |         MASTER-Amur |   C |    60 | 15.0 |        
    5353 |         MASTER-Amur |   C |   180 | 15.9 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

GCN Circular #31493
R. Hosokawa, N. Ito, K. L. Murata, M. Niwano, Y. Imai, Y. Takamatsu, R. Yamaguchi, R. Noto, S. Sato, M. Takaku, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 220118A(The Fermi GBM team GCN Circular #31489, N. J. Klingler et al. GCN Circular #31490) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope Akeno. The observation started at 2022-01-18 18:21:29 UT (51 sec after Swift BAT trigger). We stacked the images with good conditions. We detected the optical afterglow candidate reported by the Swift UVOT observation (N. J. Klingler et al. GCN Circular #31490). The magnitudes and the 5-sigma limits of the stacked images are as follows.

T0+[sec] MID-UT T-EXP[sec] magnitude(or 5-sigma limits) 5-sigma limits
-----------------------------------------------------------------------------------------------------------------
56   | 2022-01-18 18:21:34 | 10   |g'>15.9,         Rc>16.8,
Ic>16.8        | g'>15.9, Rc>16.8, Ic>16.8 |
84   | 2022-01-18 18:22:02 | 40   |g'=18.36+/-0.70, Rc=18.57+/-0.78,
Ic>17.5        | g'>17.3, Rc>17.9, Ic>17.5 |
171  | 2022-01-18 18:23:29 | 50   |g'=17.45+/-0.20, Rc=16.90+/-0.15,
Ic=17.12+/-0.41| g'>17.5, Rc>18.1, Ic>17.5 |
256  | 2022-01-18 18:24:54 | 60   |g'=17.31+/-0.18, Rc=16.87+/-0.09,
Ic=16.64+/-0.11| g'>17.7, Rc>18.5, Ic>18.1 |
325  | 2022-01-18 18:26:03 | 60   |g'=17.31+/-0.22, Rc=17.31+/-0.13,
Ic=17.08+/-0.15| g'>17.7, Rc>18.4, Ic>18.1 |
535  | 2022-01-18 18:29:33 | 300  |g'=18.21+/-0.17, Rc=17.80+/-0.10,
Ic=17.47+/-0.10| g'>18.7, Rc>19.5, Ic>19.1 |
1471 | 2022-01-18 18:45:09 | 1020 |g'=19.82+/-0.33, Rc=19.26+/-0.14,
Ic=18.81+/-0.15| g'>19.5, Rc>20.3, Ic>19.9 |
-----------------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time

We used PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire).

GCN Circular #31495
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 300 s of XRT Photon Counting mode data and 1 UVOT images for GRB 220118A, 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 = 192.26849, +22.91528 which is equivalent to:
```
RA (J2000): 12h 49m 4.44s
Dec (J2000): +22d 54' 55.0"
```
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 #31496
H. Kumar(IITB), J. Stanzin (IAO), V. Bhalerao(IITB), G. C. Anupama(IIA), S. Barway(IIA) report on behalf of the GIT team:
We observed GRB 220118A detected by Fermi-GBM (GCN #31489) and Swift-BAT (N. J. Klingler et al., GCN #31490) with 0.7m GROWTH-India Telescope (GIT). We obtained multiple 300-sec exposures in the g', r', i' and z' filters. We detect a faint (~ 3.5 sigma) afterglow in our stacked images. The obtained upper magnitudes and upper limits follow as:
---------------------------------------------------------------------------------
JD (mid) | T_mid-T0(hrs) | Exposure (sec) | Filter | Mag(AB)/Lim_mag (5-sigma)
---------------------------------------------------------------------------------
2459598.2802666 | 0.38 | 300 | r' | > 17.23
2459598.2839984 | 0.47 | 300 | i' | > 17.78
2459598.2877512 | 0.56 | 300 | g' | > 17.38
2459598.2915685 | 0.65 | 300 | z' | > 16.99
2459598.3202152 | 1.34 | 3000(stacked) | r' | > 19.84
---------------------------------------------------------------------------------
2459598.3568823 | 2.22 | 3000(stacked) | i' | 20.35 +/- 0.05
2459598.5042212 | 5.75 | 3000(stacked) | r' | 21.53 +/- 0.09
---------------------------------------------------------------------------------
The detected magnitudes and upper limits are in agreement with R. Hosokawa et al., (GCN #31493). The magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.
The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.
GCN Circular #31498
A. Belles (PSU) and N. J. Klingler (GSFC/UMBC/CRESSTII) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 220118A 99 s after the BAT trigger (Klingler et al., GCN Circ. 31490). A fading source consistent with the XRT position (Goad et al., GCN Circ. 31495) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  12:49:04.52 = 192.26885 (deg.)
    Dec (J2000) = +22:54:56.2  =  22.91562 (deg.)
```
with an estimated uncertainty of 0.44 arc sec. (radius, 90% confidence).
Preliminary detections 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

wh                 119          268          145      17.73+/-0.07
wh               11382        11797          404            >20.26
u                  276          454          175      17.33+/-0.12
b                10470        11377          885            >20.56
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.025 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #31499
T. Sakamoto (AGU), S. D. Barthelmy (GSFC), N. J. Klingler (GSFC/UMBC/CRESSTII), 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), M. Stamatikos (OSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 220118A (trigger #1093742) (Klingler et al., GCN Circ. 31490). The BAT ground-calculated position is RA, Dec = 192.277, 22.911 deg which is
```
   RA(J2000)  =  12h 49m 06.4s
   Dec(J2000) = +22d 54' 37.8"
```
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 22%.
The mask-weighted light curve shows a single-peaked structure that starts at ~T-4 s, peaks at ~T+1 s, and ends at ~T+10 s. T90 (15-350 keV) is 10.61 +- 1.78 sec (estimated error including systematics).
The time-averaged spectrum from T-3.90 to T+9.54 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.67 +- 0.12. The fluence in the 15-150 keV band is 1.8 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.68 sec in the 15-150 keV band is 3.3 +- 0.5 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/1093742/BA/
GCN Circular #31502
T. Komesh (NU), B. Grossan (UCB, NU), Z. Maksut (NU), M. Krugov (FAI),� E. Linder (UCB, NU), E. Abdikamalov (NU), K. Baigarin (NU), G. F. Smoot (HKUST, UCB, NU), report on behalf of the Energetic Cosmos Laboratory:
The Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO) observed the field of GRB 220118A 11 s after receipt an automated GCN / BAT position alert, observing in Sloan i' band, with the Burst Simultaneous Three-Channel Imager (BSTI; Grossan, Kumar & Smoot 2019, JHEA, 32, 14).
We started observations at 18:21:08 UT on 2022-01-18, 30 s after the BAT trigger. Observations were made in cloudy conditions starting at about 25 deg. target altitude. No source consistent with the XRT (M.R. Goad et al., GCN Circ. 31495) was detected.� We report the following results:
```
start time��� t-t0(s)� end time������� ULi'������ exposure_time (s)
------------��� --------� ------------��������� ------ --------------------
18:21:08 ��� 30 � � 18:22:08 �������� 15.3 ��������� 60
18:22:32 ��� 114 � 18:25:02 �������� 16.0 ������� 150
18:25:02���� 264 � 18:27:32��������� 16.4�������� 150
18:27:32���� 414 � 18:30:02��������� 17.2�������� 150
18:30:02���� 564 � 18:32:32������� � 17.4 � � � � 150
```
start time is in UT. t-t0(s) gives the time since trigger, in seconds. UL i', gives the 5 sigma upper limit sensitivity in magnitudes, for images co-added to the given exposure time. The first row in the table corresponds to co-adds of an initial short exposure image sequence of 7.5 s. The following rows correspond to co-adds from a continuing series of 15 s exposures.� Calibration was done with the 4 bright Pan-STARRS catalog stars on our images.
We caution the reader that these are preliminary results, without color or other corrections. Please also note that times are approximate.
```
----------------------------------
NU = Nazarbayev University, Nur-Sultan, Kazakhstan
UCB = University of California, Berkeley, USA
HKUST = Hong Kong University of Science and Technology
FAI = Fesenkov Astrophysical Institute, Kazakhstan
```
The NUTTelA-TAO Team acknowledges the support of the staff of the Assy-Turgen Astrophysical Observatory, Almaty, Kazakhstan, and the Fesenkov Astrophysical Institute, Almaty, Kazkhstan.
GCN Circular #31505
Margarita Pereyra (UNAM), Alan M. Watson (UNAM), Nat Butler (ASU), Rosa L. Becerra (UNAM), Oc�lotl L�pez (UNAM), Diego Gonz�lez (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Eleonora Troja (GSFC) and Tzveti Dimitrova (ASU) report:
We observed the field of GRB 220118A (Klingler et al., GCN Circ. 31490 ; Fermi GBM Team, GCN Circ. 31489) with the COATLI 50-cm telescope and interim imager at the Observatorio Astron�mico Nacional on the Sierra de San Pedro M�rtir (http://coatli.astroscu.unam.mx) from 2022-01-19 07:32 UTC to 13:26 UTC (13.24 to 19.1 hours after the trigger), obtaining a total of 16215 seconds of exposure in the r filter.
We do not detect any uncataloged sources in the enhanced XRT error region (Goad et al., GCN Circ. 31495) to a 3-sigma limit of r = 22.9, which confirms the afterglow fading reported by the GTI and Swift/UVOT teams (Kumar et al., GCN Circ. 31496; Belles et al., GCN Circ. 31498)
Our r magnitudes are calibrated against the Pan-STARRS1 catalog, are on an approximate AB system (Becerra et al., 2019, ApJ, 872, 118), and are not corrected for Galactic extinction in the direction of the GRB.
We thank the COATLI technical team and the staff of the Observatorio Astron�mico Nacional.
GCN Circular #31506
Cori Fletcher (USRA) and C. Meegan (UAH) and Boyan A. Hristov (UAH) report on behalf of the Fermi GBM Team:
"At 18:20:35.84 UT on 18 January 2022, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 220118A (trigger 664222840 / 220118764), which was also detected by the Swift BAT/XRT (N. J. Klingler et al. 2022, GCN 31490) and observed by SWIFT UVOT (A. Belles et al. 2022, GCN 31498). The Fermi GBM Final Real-time Localization (GCN 31489) is consistent with the Swift position.
The GBM light curve shows a single peak with a duration (T90) of about 19 s (50-300 keV). The time-averaged spectrum from T0+0.003 s to T0+18.176 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.08 +/- 0.09 and the cutoff energy, parameterized as Epeak, is 148.30 +/- 17.50 keV.
The event fluence (10-1000 keV) in this time interval is (3.017 +/- 0.182)E-06. The 1-sec peak photon flux measured starting from T0+3.39204 s in the 10-1000 keV band is 4.0 +/- 0.28 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN Circular #31507
D. A. Kann (HETH/IAA-CSIC), D. B. Malesani (Radboud Univ. and DAWN/NBI), A. de Ugarte Postigo (Obs. Cote d'Azur), C. C. Thoene (HETH/ASU CAS Ondrejov), M. Blazek (HETH), J. F. Agui Fernandez (HETH/IAA-CSIC), A. Guijarro, and A. Fernandez (both CAHA) report:
We observed the afterglow of GRB 220118A (Swift detection: Klingler et al., GCN #31490; Fermi/GBM Detection: Fletcher et al., GCN #31506; afterglow detections: Hosokawa et al., GCN #31493; Kumar et al., GCN #31496; Belles & Klingler, GCN #31498) with CAFOS, mounted on the 2.2 m telescope, at the Calar Alto Observatory (Almeria, Spain). The observation started at 01:09:11 UT on 19 January 2022 (6.81 hr after the GRB) and consisted of 10 x 150 s integrations in the r' band and 9 x 150 s in the i' band. Observations were hampered by the Wolf Moon, but otherwise conditions were very good (1".1 seeing, very good transparency).
The afterglow is faintly detected in the stacked images in each filter. Against several Pan-STARRS stars, we measure:
r' = 22.40 +/- 0.18 mag at 0.29916 d after trigger, and
i' = 22.07 +/- 0.17 mag at 0.32064 d after trigger.
No further observations are planned.
GCN Circular #31519
Y. Koyanagi, K. Hasuda, T. Sakamoto (AGU)
We observed the field of GRB 220118A detected by Swift (Klingler et al., GCN Circ. 31490) with The AGU Robotic Gravitational-wave Electromagnetic Telescope (TARGET) equipped with the Veloce RH200 (20 cm OTA) and the large format CCD camera (ATK11000) located at the Machida field of Aoyama Gakuin University. 20 images of 60 sec exposures were taken in the R filter starting from January 18 18:25:04 (UT) about 4.4 minutes after the trigger and stopped on January 18 18:57:56 (UT). We do not detect the optical afterglow both in the individual images and the stacked image at the enhanced XRT position (Goad, et al. GCN Circ. 31495). The estimated five sigma upper limit of the combined image (total exposure of 1200 sec) is ~16.1 mag using the USNO-B1 catalog.

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