Gamma-ray Burst 190202A

(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:     Sat 02 Feb 19 01:40:17 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.512d {+11h 06m 03s} (J2000),
                 166.761d {+11h 07m 03s} (current),
                 165.861d {+11h 03m 27s} (1950)
GRB_DEC:          +9.388d {+09d 23' 17"} (J2000),
                  +9.285d {+09d 17' 05"} (current),
                  +9.658d {+09d 39' 30"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       10274 [cnts]    Image_Peak=153 [image_cnts]
TRIGGER_DUR:     3.072 [sec] 
TRIGGER_INDEX:   487     E_range: 50-350 keV
BKG_INTEN:       52632 [cnts]
BKG_TIME:        5921.65 SOD {01:38:41.65} UT
BKG_DUR:         32 [sec]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5970.35 SOD {01:39:30.35} UT
GRB_PHI:         141.57 [deg]
GRB_THETA:        49.55 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     68.06 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +3  -2  +0  +0 +85  +0 
SUN_POSTN:       315.37d {+21h 01m 29s}  -16.94d {-16d 56' 13"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.30d {+18h 53m 13s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.00 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.46 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.95,  3.33 [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 = 298.01,6.86 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(4.0<100sec) coincident with the FERMI_GBM event (trignum=570764371).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:39:50 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     570764371
GRB_RA:          172.967d {+11h 31m 52s} (J2000),
                 173.212d {+11h 32m 51s} (current),
                 172.323d {+11h 29m 18s} (1950)
GRB_DEC:          +4.933d {+04d 55' 60"} (J2000),
                  +4.828d {+04d 49' 40"} (current),
                  +5.209d {+05d 12' 34"} (1950)
GRB_ERROR:       20.73 [deg radius, statistical plus systematic]
GRB_INTEN:       106 [cnts/sec]
DATA_SIGNIF:     6.40 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5966.21 SOD {01:39:26.21} UT
GRB_PHI:         156.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.61
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      92%  GRB
2nd_MOST_LIKELY:   4%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,1, 0,0,
SUN_POSTN:       315.37d {+21h 01m 29s}  -16.94d {-16d 56' 13"}
SUN_DIST:        141.01 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      283.30d {+18h 53m 12s}  -21.57d {-21d 33' 55"}
MOON_DIST:       110.44 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      258.90, 60.81 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      171.59,  1.74 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190202069/quicklook/glg_lc_medres34_bn190202069.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 54.53,-22.93 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:39:59 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      58
TRIGGER_NUM:     570764371
GRB_RA:          169.033d {+11h 16m 08s} (J2000),
                 169.279d {+11h 17m 07s} (current),
                 168.389d {+11h 13m 33s} (1950)
GRB_DEC:          +3.583d {+03d 34' 60"} (J2000),
                  +3.479d {+03d 28' 44"} (current),
                  +3.856d {+03d 51' 23"} (1950)
GRB_ERROR:       4.63 [deg radius, statistical plus systematic]
GRB_INTEN:       715 [cnts/sec]
DATA_SIGNIF:     63.90 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5966.21 SOD {01:39:26.21} UT
GRB_PHI:         161.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.62
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,1, 0,0,
SUN_POSTN:       315.37d {+21h 01m 29s}  -16.94d {-16d 56' 13"}
SUN_DIST:        144.11 [deg]   Sun_angle= 9.7 [hr] (West of Sun)
MOON_POSTN:      283.30d {+18h 53m 13s}  -21.57d {-21d 33' 55"}
MOON_DIST:       113.59 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      254.75, 57.25 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      168.52, -1.04 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190202069/quicklook/glg_lc_medres34_bn190202069.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 54.53,-22.93 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:40:02 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     570764371
GRB_RA:          164.680d {+10h 58m 43s} (J2000),
                 164.928d {+10h 59m 43s} (current),
                 164.031d {+10h 56m 07s} (1950)
GRB_DEC:          +6.300d {+06d 17' 60"} (J2000),
                  +6.197d {+06d 11' 51"} (current),
                  +6.568d {+06d 34' 05"} (1950)
GRB_ERROR:       3.53 [deg radius, statistical only]
DATA_SIGNIF:     -214748364.80 [sigma]
DATA_INTERVAL:   1.024 [sec]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5966.21 SOD {01:39:26.21} UT
GRB_PHI:         163.00 [deg]
GRB_THETA:        75.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       315.37d {+21h 01m 29s}  -16.94d {-16d 56' 13"}
SUN_DIST:        149.18 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      283.30d {+18h 53m 13s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.62 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      245.68, 56.08 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.47, -0.22 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190202069/quicklook/glg_lc_medres34_bn190202069.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_570764371.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
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.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:48:49 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     570764371
GRB_RA:          169.890d {+11h 19m 34s} (J2000),
                 170.137d {+11h 20m 33s} (current),
                 169.242d {+11h 16m 58s} (1950)
GRB_DEC:          +7.780d {+07d 46' 48"} (J2000),
                  +7.675d {+07d 40' 31"} (current),
                  +8.054d {+08d 03' 14"} (1950)
GRB_ERROR:       2.08 [deg radius, statistical only]
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5966.21 SOD {01:39:26.21} UT
GRB_PHI:         158.00 [deg]
GRB_THETA:        73.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       315.38d {+21h 01m 31s}  -16.94d {-16d 56' 06"}
SUN_DIST:        144.87 [deg]   Sun_angle= 9.7 [hr] (West of Sun)
MOON_POSTN:      283.38d {+18h 53m 32s}  -21.57d {-21d 33' 55"}
MOON_DIST:       114.38 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      250.32, 60.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      167.66,  3.15 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190202069/quicklook/glg_lc_medres34_bn190202069.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190202069/quicklook/glg_locplot_all_bn190202069.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:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=8216).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sat 02 Feb 19 01:40:30 UT 
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    8216,   Sub_Num: 0
GRB_INTEN:      9.08 [sigma]
GRB_TIME:       5964.99 SOD {01:39:24.99} UT
GRB_DATE:       18516 TJD;    33 DOY;   19/02/02
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(6.0<100sec) coincident with the SWIFT_BAT event (trignum=887217).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2019-02/2019-02-02T01-39-24.8014-17151-60304-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:42:48 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.5026d {+11h 06m 00.6s} (J2000),
                 166.7512d {+11h 07m 00.2s} (current),
                 165.8509d {+11h 03m 24.2s} (1950)
GRB_DEC:          +9.3779d {+09d 22' 40.4"} (J2000),
                  +9.2745d {+09d 16' 28.2"} (current),
                  +9.6482d {+09d 38' 53.6"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       33 [cnts]
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6133.53 SOD {01:42:13.53} UT,   163.2 [sec] since BAT Trigger Time
CENTROID_X:      320.95,  raw= 321  [pixels]
CENTROID_Y:      365.26,  raw= 365  [pixels]
ROLL:            107.26 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   157.61
GRB_POS_XRT_Z:   34.31
IMAGE_URL:       sw00887217000msxps_rw.img
SUN_POSTN:       315.37d {+21h 01m 30s}  -16.94d {-16d 56' 11"}
SUN_DIST:        148.54 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.33d {+18h 53m 19s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.03 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.44 [deg] galactic lon,lat of the burst
ECL_COORDS:      163.95,  3.32 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:42:52 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.5026d {+11h 06m 00.6s} (J2000),
                 166.7512d {+11h 07m 00.2s} (current),
                 165.8509d {+11h 03m 24.2s} (1950)
GRB_DEC:          +9.3779d {+09d 22' 40.4"} (J2000),
                  +9.2745d {+09d 16' 28.2"} (current),
                  +9.6482d {+09d 38' 53.6"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       33 [cnts]
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6133.53 SOD {01:42:13.53} UT,   163.2 [sec] since BAT Trigger Time
CENTROID_X:      320.95,  raw= 321  [pixels]
CENTROID_Y:      365.26,  raw= 365  [pixels]
ROLL:            107.26 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   157.61
GRB_POS_XRT_Z:   34.31
IMAGE_URL:       sw00887217000msxps_rw.img
SUN_POSTN:       315.37d {+21h 01m 30s}  -16.94d {-16d 56' 11"}
SUN_DIST:        148.54 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.33d {+18h 53m 19s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.03 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.44 [deg] galactic lon,lat of the burst
ECL_COORDS:      163.95,  3.32 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:42:39 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.5026d {+11h 06m 00.62s} (J2000),
                 166.7512d {+11h 07m 00.28s} (current),
                 165.8509d {+11h 03m 24.22s} (1950)
GRB_DEC:          +9.3779d {+09d 22' 40.4"} (J2000),
                  +9.2745d {+09d 16' 28.2"} (current),
                  +9.6482d {+09d 38' 53.6"} (1950)
GRB_ERROR:       5.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       7.50e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.74 [sigma]
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6133.53 SOD {01:42:13.53} UT,   163.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.20 261.70 243.60
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       315.37d {+21h 01m 30s}  -16.94d {-16d 56' 11"}
SUN_DIST:        148.54 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.33d {+18h 53m 18s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.02 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.44 [deg] galactic lon,lat of the burst
ECL_COORDS:      163.95,  3.32 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.83 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:43:49 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.512d {+11h 06m 03s} (J2000),
                 166.761d {+11h 07m 03s} (current),
                 165.861d {+11h 03m 27s} (1950)
GRB_DEC:          +9.388d {+09d 23' 17"} (J2000),
                  +9.285d {+09d 17' 05"} (current),
                  +9.658d {+09d 39' 30"} (1950)
GRB_DATE:        18516 TJD;    33 DOY;   19/02/02
GRB_TIME:        5970.35 SOD {01:39:30.35} UT
TRIGGER_INDEX:   487
GRB_PHI:         141.57 [deg]
GRB_THETA:        49.55 [deg]
DELTA_TIME:      -69.00 [sec]
TRIGGER_DUR:     3.072 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     68.06 [sigma]
IMAGE_SIGNIF:    7.85 [sigma]
LC_URL:          sw00887217000msb.lc
SUN_POSTN:       315.38d {+21h 01m 30s}  -16.94d {-16d 56' 10"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.34d {+18h 53m 21s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.03 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.46 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.95,  3.33 [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 = 298.01,6.86 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:45:10 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     887217,   Seg_Num: 0
POINT_RA:        166.499d {+11h 06m 00s} (J2000)
POINT_DEC:        +9.333d {+09d 19' 58"} (J2000)
POINT_ROLL:      107.260d
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6143.01 SOD {01:42:23.01} UT,   172.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.134
N_STARS:         107
X_OFFSET:        264 [pixels]
Y_OFFSET:        208 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1167 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00887217000msufc0172.fits
SUN_POSTN:       315.38d {+21h 01m 30s}  -16.94d {-16d 56' 09"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.35d {+18h 53m 24s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.03 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.50, 59.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      163.96,  3.28 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 01:45:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     887217,   Seg_Num: 0
POINT_RA:        166.499d {+11h 06m 00s} (J2000)
POINT_DEC:        +9.333d {+09d 19' 58"} (J2000)
POINT_ROLL:      107.260d
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6143.01 SOD {01:42:23.01} UT,   172.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.134
N_STARS:         107
X_OFFSET:        264 [pixels]
Y_OFFSET:        208 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1167 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00887217000msufc0172.fits
SUN_POSTN:       315.38d {+21h 01m 30s}  -16.94d {-16d 56' 09"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.35d {+18h 53m 24s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.04 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.50, 59.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      163.96,  3.28 [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 02 Feb 19 01:46:26 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     887217,   Seg_Num: 0
POINT_RA:        166.499d {+11h 06m 00s} (J2000)
POINT_DEC:        +9.333d {+09d 19' 58"} (J2000)
ROLL:            107.260d
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6143.01 SOD {01:42:23.01} UT,   172.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     570764565
X_OFFSET:        587 [pixels]
Y_OFFSET:        623 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       747
Y_GRB_POS:       783
BINNING_INDEX:   1
IM_URL:          sw00887217000msuni0195.fits
SUN_POSTN:       315.38d {+21h 01m 30s}  -16.94d {-16d 56' 08"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.36d {+18h 53m 26s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.04 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.50, 59.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      163.96,  3.28 [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 02 Feb 19 01:46:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     887217,   Seg_Num: 0
POINT_RA:        166.499d {+11h 06m 00s} (J2000)
POINT_DEC:        +9.333d {+09d 19' 58"} (J2000)
ROLL:            107.260d
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6143.01 SOD {01:42:23.01} UT,   172.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     570764565
X_OFFSET:        587 [pixels]
Y_OFFSET:        623 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       747
Y_GRB_POS:       783
BINNING_INDEX:   1
IM_URL:          sw00887217000msuni0195.fits
SUN_POSTN:       315.38d {+21h 01m 31s}  -16.94d {-16d 56' 08"}
SUN_DIST:        148.53 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.36d {+18h 53m 27s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.05 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.50, 59.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      163.96,  3.28 [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 02 Feb 19 01:48:42 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.5026d {+11h 06m 00.62s} (J2000),
                 166.7512d {+11h 07m 00.28s} (current),
                 165.8509d {+11h 03m 24.22s} (1950)
GRB_DEC:          +9.3768d {+09d 22' 36.4"} (J2000),
                  +9.2734d {+09d 16' 24.3"} (current),
                  +9.6471d {+09d 38' 49.7"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         16.01 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  6140.00 SOD {01:42:20.00} UT,   169.6 [sec] since BAT Trigger Time
SUN_POSTN:       315.38d {+21h 01m 31s}  -16.94d {-16d 56' 07"}
SUN_DIST:        148.54 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.38d {+18h 53m 31s}  -21.57d {-21d 33' 55"}
MOON_DIST:       118.07 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      163.95,  3.32 [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 4.0 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #23830
A. Y. Lien (GSFC/UMBC), P. D'Avanzo (INAF-OAB), J.D. Gropp (PSU), N. J. Klingler (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. H. Siegel (PSU) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 01:39:30 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190202A (trigger=887217). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 166.512, +9.388 which is
```
   RA(J2000) = 11h 06m 03s
   Dec(J2000) = +09d 23' 17"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 30 sec. The peak count rate was ~4500 counts/sec (15-350 keV), at ~5 sec after the trigger.
The XRT began observing the field at 01:42:13.5 UT, 163.2 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 166.5026, 9.3779 which is equivalent to:
```
   RA(J2000)  = 11h 06m 0.62s
   Dec(J2000) = +09d 22' 40.4"
```
with an uncertainty of 5.9 arcseconds (radius, 90% containment). This location is 49 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
UVOT took a finding chart exposure of 126 seconds with the White filter starting 172 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	11:06:00.63 = 166.50262
  DEC(J2000) = +09:22:36.6  =	9.37683
```
with a 90%-confidence error radius of about 0.74 arc sec. This position is 3.9 arc sec. from the center of the XRT error circle. The estimated magnitude is 16.01 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is A. Y. Lien (amy.y.lien 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: /too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 02 Feb 19 02:32:08 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     887217,   Seg_Num: 0
GRB_RA:          166.5013d {+11h 06m 00.31s} (J2000),
                 166.7499d {+11h 07m 00.02s} (current),
                 165.8496d {+11h 03m 23.91s} (1950)
GRB_DEC:          +9.3761d {+09d 22' 33.9"} (J2000),
                  +9.2727d {+09d 16' 21.7"} (current),
                  +9.6464d {+09d 38' 47.1"} (1950)
GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18516 TJD;    33 DOY;   19/02/02
IMG_START_TIME:  8200.00 SOD {02:16:40.00} UT,   2229.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       315.41d {+21h 01m 38s}  -16.93d {-16d 55' 35"}
SUN_DIST:        148.58 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      283.77d {+18h 55m 05s}  -21.56d {-21d 33' 51"}
MOON_DIST:       118.44 [deg]
MOON_ILLUM:      7 [%]
GAL_COORDS:      243.44, 59.44 [deg] galactic lon,lat of the burst
ECL_COORDS:      163.94,  3.32 [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 #23831
A. Novichonok (KIAM), A. Pozanenko (IKI), E. Mazaeva (IKI), S. Belkin (IKI), A. Volnova (IKI), I. Molotov (KIAM) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 190202A (Lien , et al., GCN 23830) with Zeiss-1000 1-m telescope of Koshka Observatory starting on Feb. 02 (UT) 02:40:34 in R-filter. We detect the optical afterglow (Lien , et al., GCN 23830) in coordinates (J2000) 11:06:00.60 +09:22:36.2 (uncertainiies in both coordinates of 0.5 arcsec) coinciding with reported in GCN 23830. Preliminary photometry of the afterglow at 2019-02-02 02:49:35 is R=17.8 +/- 0.15.
The photometry is based on several nearby USNO-B1.0 stars.
GCN Circular #23832
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 348 s of XRT Photon Counting mode data and 1 UVOT images for GRB 190202A, 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 = 166.50234, +9.37689 which is equivalent to:
```
RA (J2000): 11h 06m 0.56s
Dec (J2000): +09d 22' 36.8"
```
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 #23833
D.Steeghs (U.Warwick), Y.-L.Mong (Monash U.), G.Ramsay (Armagh O.), M.Dyer (U. Sheffield), J.Lyman, K.Ulaczyk (U. Warwick), A.Obradovic, K. Ackley, D.K. Galloway, E.Rol (Monash U.), K. Wiersema, B.Gompertz, A.Levan, R.Cutter (U. Warwick), V.Dhillon (U. Sheffield), P.O'Brien, R.Starling (U. Leicester), S.Poshyachindav(NARIT), D.Pollacco (U. Warwick), E.Thrane (Monash U.), E.Palle (IAC)
report on behalf of the GOTO collaboration:
In response to Swift BAT trigger 887217 (GRB190202A; Lien et al. GCN 23830), the Gravitational-wave Optical Transient Observer (GOTO) observed the survey field covering the Swift BAT/XRT positions.
Due to adverse weather, observations started at 2019-02-02T03:51:41 (2.2 hours post burst) consisting of a set of 5x120s exposures in our wide L filter (400-700nm).
We detect the optical counterpart coincident with the revised XRT position reported in Evans et al. (GCN 23832) at a S/N of 18. Preliminary pipeline photometry based off a PS1 zeropoint provides g=19.1 +/- 0.2, with the uncertainty including a systematic error component due to the calibration uncertainty. This has not been corrected for galactic extinction.
GOTO is operated at the La Palma observing facilities of the University of Warwick on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT) and the Instituto de Astrofisica de Canarias (IAC) (https://goto-observatory.org/)
GCN Circular #23834
Paul Kuin (UCL/MSSL) and A. Y. Lien (GSFC/UMBC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190202A 173 s after the BAT trigger (Lien et al., GCN Circ. 23830). The source was also observed in R (Novichonok et al., GCN Circ. 23831). A source consistent with the XRT position (Evans et al. GCN Circ. 23832) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  11:06:00.63 = 166.50261 (deg.)
    Dec (J2000) = +09:22:36.7  =   9.37687 (deg.)
```
with an estimated uncertainty of 0.42 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              173          299          124         16.02 +/- 0.03
v                 1613         2153           78         17.94 +/- 0.18
b                 1711         1903           39         18.38 +/- 0.16
u                 1686         2054           58         18.20 +/- 0.17
w1                1662         2376           97        >18.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #23835
F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, Y. Evangelista, G. Piano (INAF/IAPS), C. Pittori, F. Lucarelli, (SSDC, and INAF/OAR), F. Longo (Univ. Trieste and INFN Trieste), A. Bulgarelli, V. Fioretti, F. Fuschino (INAF/OAS-Bologna), A. Argan (INAF/IAPS), A. Giuliani (INAF/IASF-Mi), M. Marisaldi (INAF/OAS, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), report on behalf of the AGILE Team:
AGILE detected the long GRB 190202A first reported by Swift in Lien et al., GCN 23830, in the scientific ratemeters of the Anti-Coincidence (50-200 keV), Super-AGILE (SA; 18-60 keV) and Mini-Caloremeter (MCAL; 0.4-100 MeV) detectors. The event position was not exposed by the AGILE Gamma-Ray Imaging Detector.
The low significance event lasted about 15s in the three light curves with the SA one starting about 8 s before the trigger time and the MCAL one about 10 s before.
Further analyses are still in progress.
GCN Circular #23836
C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+400 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190202A (trigger #887217) (Lien et al., GCN Circ. 23830). The BAT ground-calculated position is RA, Dec = 166.506, 9.393 deg which is
```
  RA(J2000)  =  11h 06m 01.4s
  Dec(J2000) = +09d 23' 33.9"
```
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 4%.
The mask-weighted light curve shows two overlapping pulses that start at ~T0 and end at ~T+25 s. The two peaks occur at ~T0 and ~T+5 s, respectively, Note that the burst location came into the BAT field of view at ~T-69 s, and Swift went into SAA at ~T+210 s. T90 (15-350 keV) is 19.4 +- 6.9 sec (estimated error including systematics).
The time-averaged spectrum from T-0.90 to T+26.52 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.32 +- 0.13. The fluence in the 15-150 keV band is 6.0 +- 0.5 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+4.68 sec in the 15-150 keV band is 7.8 +- 1.5 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/887217/BA/
GCN Circular #23838
P. Veres and C. Meegan (both UAH) report on behalf of the Fermi GBM Team:
"At 01:39:26.21 UT on 02 February 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190202A (trigger 570764371 / 190202069) which was also detected by the Swift/BAT (Lien et al., GCN 23830). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 76 degrees.
The GBM light curve shows a dominant pulse with some structure with a duration (T90) of about 18.4 s (50-300 keV). The time-averaged spectrum from T0-0.4 s to T0+12.8 s is best fit by a Band function with Epeak = 287 +/- 18 keV, alpha = -0.74 +/- 0.04, and beta = -2.22 +/- 0.12.
The event fluence (10-1000 keV) in this time interval is (1.81 +/- 0.03)E-5 erg/cm^2. The 1-sec peak photon flux measured starting from T0+5.4 s in the 10-1000 keV band is 13.6 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #23839
A. Cucchiara (U. of the Virgin Islands) reports on behalf of a larger collaboration:
We observed Swift GRB 190202A (Tohuvavohu et al. GCN 23803) with the LCO 1-m units at CTIO on January 2, from 06:49 to 07:40 UT (corresponding to 0.2 to 0.25 hours from the GRB trigger time) with the SDSS r' and i' filters.
We performed a series of 10x120s in both filters and we clearly detect the optical afterglow (Novichonok et al. GCN 23831) with the following magnitudes:
```
r' = 19.57 +-  0.04
i' = 19.19 +- 0.05
```
These magnitude are calibrated against several SDSS objects near the GRB location and are not corrected for Galactic Extinction.
These observations were possible thanks to the USVI NASA-EPSCoR Research Infrastructure Development (RID) grant NNX16AL44A.
GCN Circular #23840
A. Y. Lien (GSFC/UMBC) reports on behalf of the Swift-XRT team:
We have analysed 3.6 ks of XRT data for GRB 190202A (Lien et al. GCN Circ. 23830), from 152 s to 65.6 ks after the BAT trigger. The data comprise 819 s in Windowed Timing (WT) mode (the first 9 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 Evans et al. (GCN Circ. 23832).
The light curve can be modelled with an initial power-law decay with an index of alpha=0.592 (+0.021, -0.077), followed by a break at T+1879 s to an alpha of 1.47 (+0.05, -0.04).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.89 (+/-0.05). The best-fitting absorption column is consistent with the Galactic value of 2.4 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.82 (+0.13, -0.12) and a best-fitting absorption column of 6.8 (+3.2, -2.9) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.8 (+3.2, -2.9) x 10^20 cm^-2
Galactic foreground: 2.4 x 10^20 cm^-2
Excess significance: 2.5 sigma
Photon index:	     1.82 (+0.13, -0.12)
```
If the light curve continues to decay with a power-law decay index of 1.47, the count rate at T+24 hours will be 0.027 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 9.8 x 10^-13 (1.1 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00887217.
This circular is an official product of the Swift-XRT team.
GCN Circular #23841
Gregory S. H. Paek, Myungshin Im, Lim Gu, on behalf of a larger collaboration
We observed the afterglow of GRB 190202A (Lien et al., GCN 23830; Novichonok et al., GCN 23831; Evans et al., GCN 23832; Steeghs et al., GCN 23833; Kuin et al., GCN 23834; Verrecchia et al., GCN 23835; Markwardt et al., GCN 23836; Veres et al., GCN 23838; Cucchiara et al., GCN 23839; Lien et al., GCN 23840) with the 0.8-m telescope at the McDonald observatory. The observation started at 2019-02-02 08:02 UT or about 6.3 hours after the initial alert.
The afterglow is detected in R bands, and preliminary magnitudes are derived, using nearby Pan-STARRS stars as photometry references.
```
Filter Date UT-start exptime[sec] AB_mag
R    2019-02-02 08:02:05        180*3    19.72 +/- 0.15
```
GCN Circular #23842
D. Malesani (DAWN/NBI and DARK/NBI), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), and H. J. Deeg (IAC) report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 190202A (Lien et al., GCN 23830) using the Nordic Optical Telescope (NOT) equipped with the StanCam imager. Observations were carried out starting on 2019 Feb 3.06 UT (0.99 days after the GRB). A total of 3x600 s in the SDSS g band was acquired.
Calibrating against nearby reference stars from the SDSS catalog, we measure for the afterglow a preliminary magnitude of g = 21.72 +- 0.03 (AB).
GCN Circular #23843
S. Belkin (IKI), I. Reva (FAPHI), A. Pozanenko (IKI), E. Mazaeva (IKI), A. Volnova (IKI), A. Kusakin (FAPHI), M. Krugov (FAPHI) report on behalf of IKI-GRB-FuN collaboration:
We observed the afterglow of GRB 190202A (Lien et al., GCN 23830; Novichonok et al., GCN 23831; Evans et al., GCN 23832; Steeghs et al., GCN 23833; Kuin et al., GCN 23834; Verrecchia et al., GCN 23835; Markwardt et al., GCN 23836; Veres et al., GCN 23838; Cucchiara et al., GCN 23839; Lien et al., GCN 23840; Paek et al., GCN 23841; Malesani et al., GCN 23842) with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory starting on Feb. 02 (UT) 21:04:32. Preliminary photometry of the field is following.
```
Date       UT start t-T0    Filter Exp.   OT    Err.  UL
                     (mid, days) (s)

2019-02-02 21:04:32 0.82502 R      21*120 20.43 0.11  21.6
```
The photometry is based on nearby USNO-B1.0 stars
GCN Circular #23844
A. S. Moskvitin and O. I. Spiridonova (SAO RAS) report on behalf of larger collaboration.
We observed the field of the GRB 190202A (Lien et al., GCNC #23830) with the Zeiss-1000 telescope of SAO RAS (+ CCD photometer) on February, 3, 2:21:17--3:13:27 UT (mid.date 2:47:22). The observations were carried out in Rc band.
We detected the OT (Novichonok et al., GCNC #23831; Steeghs et al., GCNC #23833; Paul Kuin & A. Y. Lien, GCNC #23834; Cucchiara, GCNC #23839; Paek et al., GCNC #23841; Malesani et al., GCNC #23842; Belkin et al., 23843) in the stacked 9 x 300 sec image.
Preliminary brightness of OT is R = 21.45 +/- 0.15 (T-T0 = 1.047 d). The calibrations is based on nearby SDSS stars, magnitudes converted with the Lupton 2005 equations.
GCN Circular #23853
Brajesh Kumar (IIA), Avinash Singh (IIA), Ashish Raj (IIA), S. B. Pandey (ARIES), D. K. Sahu (IIA) and G. C. Anupama (IIA)
We observed the field of GRB 190202A (Lien et al., GCNC 23830) with the 2-m Himalayan Chandra Telescope (HCT) located at the Indian Astronomical Observatory, Hanle, India on 2019-02-02 (21:32:29 UT). Two frames in Bessell R and I-bands with an exposure time of 300 sec each were obtained. The OT candidate (Novichonok et al., GCNC 23831; Steeghs et al., GCNC 23833; Cucchiara, GCNC 23839; Paek et al., GCNC 23841; Malesani et al., GCNC 23842; Belkin et al., 23843; Moskvitin & Spiridonova, GCNC 23844) is clearly detected in both frames at the Swift UVOT coordinates (Kuin & Lien, GCNC 23834). The preliminary magnitudes calibrated against the USNO-B1.0 catalogue are following:
```
       UT-mid          Band           Mag
-------------------  ------    --------------
2019-02-02 21:34:59    R       20.66 +/- 0.17
2019-02-02 21:40:56    I       20.08 +/- 0.20
```
We thank the observing staff at IAO and CREST for helping with the observations.
GCN Circular #23870
A. S. Moskvitin, O. I. Spiridonova, O. A. Maslennikova (SAO RAS), and A. A. Volnova (IKI RAS) report on behalf of larger collaboration.
We observed the field of the GRB 190202A (Lien et al., GCNC #23830) with the Zeiss-1000 telescope of SAO RAS (+ CCD photometer) on February, 3, 21:15:42--22:45:25 UT (mid. time 22:00:33). The observations were carried out in Rc band.
We detected the OT (Novichonok et al., GCNC #23831; Steeghs et al., GCNC #23833; Paul Kuin & A. Y. Lien, GCNC #23834; Cucchiara, GCNC #23839; Paek et al., GCNC #23841; Malesani et al., GCNC #23842; Belkin et al., 23843; Moskvitin & Spiridonova, GCNC #23844; Brajesh Kumar et al., GCNC #23853) in the stacked 15 x 300 sec image.
Preliminary brightness of OT is R = 21.9 +/- 0.1 (T-T0 = 1.848 d). The calibrations is based on nearby SDSS stars, magnitudes converted with the Lupton 2005 equations.
GCN Circular #23871
D. Xu, Z.P. Zhu, B.J. Xi, B.Y. Yu, F. Xiao, H.J. Wang (NAOC), J.H. Liu, X. Zhang (XAO) report on behalf of a larger collaboration:
We observed the field of GRB 190202A (Lien et al., GCN 23830) using the Xinglong-2.16m equipped with the BFOSC camera. Observations were carried out starting at 17:26:32 UT on 2019-02-03, and 6x600s R-band frames were obtained.
The previously reported afterglow (e.g., Lien et al., GCN 23830; Novichonok et al., GCN 23833, Cucchiara, GCN 23839; Paek et al., GCN 23841; Malesani et al., GCN 23842; Belkin et al., 23843; Moskvitin & Spiridonova, GCN 23844; Kumar et al., GCN 23853; Moskvitin et al., GCN 23870) is very weakly detected in our stacked image, with R=22.0 +/- 0.4 mag (at Tmid-T0 = 1.679 days post-burst), calibrated with nearby SDSS stars.
GCN Circular #23874
Harsh Kumar (IITB), Shubham Srivastav (IITB), Viraj karambelkar (IITB), Gaurav Waratkar(IITB), Tsewang Stanzin (IAO, IIA), Varun Bhalerao (IITB), G.C. Anupama (IIA) report on behalf of the GROWTH-India collaboration:
We observed the optical afterglow of GRB190202 (Lien , et al., GCN 23830, Novichonok et al. GCN 23831, Kuin P, et al. GCN 23834, Cucchiara A, et al. GCN 23839) with the 0.7m robotic GROWTH-India telescope at the Indian Astronomical Observatory.Observation were started at 2019-02-02 19:25:26.704. We observed the field using r filter with 600sec exposure.. We clearly detected a faint afterglow source at coordinates specified in (Kuin P, et al. GCN 23834). Magnitudes were calibrated using PanSTARRs reference stars in the same field from the PS1 catalog. The measured magnitude in r filter image is 20.58 +/- 0.1 (AB magnitude)
GROWTH India telescope is a 70-cm telescope with a 0.7 degree field of view, set up by the Indian Institute of Astrophysics and the Indian Institute of Technology Bombay with support from the Indo-US Science and Technology Forum (IUSSTF) and the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Government of India (https://sites.google.com/view/growthindia/). It is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA).
GCN Circular #23875
V. Sharma, T. Khanam and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed the detection of a long GRB 190202A, which was also detected by Swift (Lien A. Y. et al., GCN Circ 23830), AGILE ratemeters (Verrecchia F. et al., GCN Circ 23835) and Fermi GBM (Veres P. et al., GCN Circ 23838).
The source was clearly detected in the 20-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 01:39:31.5 UT. The measured peak count rate is 453 cts/s above the background in the combined data of four quadrants, with a total of 3173 cts. The local mean background count rate was 471 cts/s. Using cumulative rates, we measure a T90 of 14.8 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
GCN Circular #23881
I. V. Sokolov (Terskol Peak Observatory), A. V. Sergeev (Terskol Peak Observatory), A. S. Moskvitin (SAO RAS), V. B. Petkov (BNO INR RAS) report on behalf of larger collaboration.
We observed the field of the GRB 190202A (Lien et al., GCNC #23830) with the Zeiss-2000 telescope of Terskol Peak Observatory on February, 3, 21:14:49--22:52:52 UT.
We detected the OT (Novichonok et al., GCNC #23831; Steeghs et al., GCNC #23833; Paul Kuin & A. Y. Lien, GCNC #23834; Cucchiara, GCNC #23839; Paek et al., GCNC #23841; Malesani et al., GCNC #23842; Belkin et al., 23843; Moskvitin & Spiridonova, GCNC #23844; Brajesh Kumar et al., GCNC #23853; Moskvitin et al., GCNC #23870; Xu et al., GCNC #23871) in the stacked 16 x 180 sec. R band image.
Preliminary brightness of OT is R = 21.92 +/- 0.17 (T-T0 = 1.850 d). The calibrations is based on nearby SDSS stars, magnitudes converted with the Lupton 2005 equations.

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Jochen Greiner, last update: 07-Feb-2019 [Disclaimer]