Gamma-ray Burst 200216B

(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:     Sun 16 Feb 20 13:32:49 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.461d {+10h 41m 51s} (J2000),
                 160.732d {+10h 42m 56s} (current),
                 159.787d {+10h 39m 09s} (1950)
GRB_DEC:         +19.454d {+19d 27' 15"} (J2000),
                 +19.348d {+19d 20' 54"} (current),
                 +19.716d {+19d 42' 57"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1918 [cnts]    Image_Peak=133 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       20995 [cnts]
BKG_TIME:        48743.55 SOD {13:32:23.55} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18895 TJD;    47 DOY;   20/02/16
GRB_TIME:        48753.85 SOD {13:32:33.85} UT
GRB_PHI:          30.08 [deg]
GRB_THETA:        23.27 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.16 [sigma]
IMAGE_SIGNIF:    8.23 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  -1  +0  +0 +97  +0 
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 41"}
SUN_DIST:        167.19 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.80d {+16h 15m 11s}  -18.39d {-18d 23' 28"}
MOON_DIST:        89.79 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.44, 59.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      154.61, 10.38 [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 = 156.39,-4.47 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=603552759).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:32:59 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     603552759
GRB_RA:          165.833d {+11h 03m 20s} (J2000),
                 166.105d {+11h 04m 25s} (current),
                 165.156d {+11h 00m 38s} (1950)
GRB_DEC:         +27.450d {+27d 26' 60"} (J2000),
                 +27.341d {+27d 20' 29"} (current),
                 +27.720d {+27d 43' 10"} (1950)
GRB_ERROR:       21.58 [deg radius, statistical plus systematic]
GRB_INTEN:       65 [cnts/sec]
DATA_SIGNIF:     5.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18895 TJD;    47 DOY;   20/02/16
GRB_TIME:        48754.75 SOD {13:32:34.75} UT
GRB_PHI:         172.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.74
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      70%  GRB
2nd_MOST_LIKELY:  27%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,0,1, 0,0,
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 41"}
SUN_DIST:        158.46 [deg]   Sun_angle= 10.9 [hr] (West of Sun)
MOON_POSTN:      243.80d {+16h 15m 11s}  -18.39d {-18d 23' 29"}
MOON_DIST:        88.01 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      205.89, 66.03 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      156.03, 19.67 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_lc_medres34_bn200216564.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 259.37,16.57 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=956824).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:33:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     603552759
GRB_RA:          151.970d {+10h 07m 53s} (J2000),
                 152.246d {+10h 08m 59s} (current),
                 151.283d {+10h 05m 08s} (1950)
GRB_DEC:         +19.050d {+19d 03' 00"} (J2000),
                 +18.951d {+18d 57' 03"} (current),
                 +19.295d {+19d 17' 42"} (1950)
GRB_ERROR:       7.23 [deg radius, statistical only]
DATA_SIGNIF:     11.50 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        18895 TJD;    47 DOY;   20/02/16
GRB_TIME:        48754.75 SOD {13:32:34.75} UT
GRB_PHI:         175.00 [deg]
GRB_THETA:        85.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 40"}
SUN_DIST:        172.94 [deg]   Sun_angle= 11.8 [hr] (West of Sun)
MOON_POSTN:      243.80d {+16h 15m 12s}  -18.39d {-18d 23' 32"}
MOON_DIST:        97.29 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      216.20, 51.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      147.22,  7.05 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_lc_medres34_bn200216564.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_603552759.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.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=956824).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:41:54 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     603552759
GRB_RA:          159.170d {+10h 36m 41s} (J2000),
                 159.443d {+10h 37m 46s} (current),
                 158.491d {+10h 33m 58s} (1950)
GRB_DEC:         +20.980d {+20d 58' 48"} (J2000),
                 +20.875d {+20d 52' 31"} (current),
                 +21.240d {+21d 14' 23"} (1950)
GRB_ERROR:       6.54 [deg radius, statistical only]
GRB_DATE:        18895 TJD;    47 DOY;   20/02/16
GRB_TIME:        48754.75 SOD {13:32:34.75} UT
GRB_PHI:         176.00 [deg]
GRB_THETA:        78.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       329.54d {+21h 58m 10s}  -12.39d {-12d 23' 33"}
SUN_DIST:        167.28 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.88d {+16h 15m 32s}  -18.41d {-18d 24' 45"}
MOON_DIST:        91.53 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      216.86, 58.73 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      152.88, 11.33 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_lc_medres34_bn200216564.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_locplot_all_bn200216564.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(1.0<100sec) coincident with the SWIFT_BAT event (trignum=956824).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:35:08 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.4359d {+10h 41m 44.6s} (J2000),
                 160.7069d {+10h 42m 49.6s} (current),
                 159.7616d {+10h 39m 02.7s} (1950)
GRB_DEC:         +19.4750d {+19d 28' 30.0"} (J2000),
                 +19.3693d {+19d 22' 09.5"} (current),
                 +19.7368d {+19d 44' 12.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       43 [cnts]
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48869.00 SOD {13:34:29.00} UT,   115.2 [sec] since BAT Trigger Time
CENTROID_X:      234.31,  raw= 234  [pixels]
CENTROID_Y:      366.29,  raw= 366  [pixels]
ROLL:            57.67 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   160.76
GRB_POS_XRT_Z:   -172.28
IMAGE_URL:       sw00956824000msxps_rw.img
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 39"}
SUN_DIST:        167.20 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.82d {+16h 15m 16s}  -18.40d {-18d 23' 47"}
MOON_DIST:        89.85 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.39, 59.35 [deg] galactic lon,lat of the burst
ECL_COORDS:      154.58, 10.39 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:34:58 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.4359d {+10h 41m 44.61s} (J2000),
                 160.7069d {+10h 42m 49.66s} (current),
                 159.7616d {+10h 39m 02.78s} (1950)
GRB_DEC:         +19.4750d {+19d 28' 30.0"} (J2000),
                 +19.3693d {+19d 22' 09.5"} (current),
                 +19.7368d {+19d 44' 12.4"} (1950)
GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.33e-09 [erg/cm2/sec]
GRB_SIGNIF:      6.55 [sigma]
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48869.00 SOD {13:34:29.00} UT,   115.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.17 261.69 243.51
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 39"}
SUN_DIST:        167.20 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.82d {+16h 15m 16s}  -18.40d {-18d 23' 46"}
MOON_DIST:        89.84 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.39, 59.35 [deg] galactic lon,lat of the burst
ECL_COORDS:      154.58, 10.39 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.88 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:35:10 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.4359d {+10h 41m 44.6s} (J2000),
                 160.7069d {+10h 42m 49.6s} (current),
                 159.7616d {+10h 39m 02.7s} (1950)
GRB_DEC:         +19.4750d {+19d 28' 30.0"} (J2000),
                 +19.3693d {+19d 22' 09.5"} (current),
                 +19.7368d {+19d 44' 12.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       43 [cnts]
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48869.00 SOD {13:34:29.00} UT,   115.2 [sec] since BAT Trigger Time
CENTROID_X:      234.31,  raw= 234  [pixels]
CENTROID_Y:      366.29,  raw= 366  [pixels]
ROLL:            57.67 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   160.76
GRB_POS_XRT_Z:   -172.28
IMAGE_URL:       sw00956824000msxps_rw.img
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 39"}
SUN_DIST:        167.20 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.82d {+16h 15m 16s}  -18.40d {-18d 23' 48"}
MOON_DIST:        89.85 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.39, 59.35 [deg] galactic lon,lat of the burst
ECL_COORDS:      154.58, 10.39 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:36:30 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.461d {+10h 41m 51s} (J2000),
                 160.732d {+10h 42m 56s} (current),
                 159.787d {+10h 39m 09s} (1950)
GRB_DEC:         +19.454d {+19d 27' 15"} (J2000),
                 +19.348d {+19d 20' 54"} (current),
                 +19.716d {+19d 42' 57"} (1950)
GRB_DATE:        18895 TJD;    47 DOY;   20/02/16
GRB_TIME:        48753.85 SOD {13:32:33.85} UT
TRIGGER_INDEX:   124
GRB_PHI:          30.08 [deg]
GRB_THETA:        23.27 [deg]
DELTA_TIME:      -70.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.16 [sigma]
IMAGE_SIGNIF:    8.23 [sigma]
LC_URL:          sw00956824000msb.lc
SUN_POSTN:       329.54d {+21h 58m 09s}  -12.39d {-12d 23' 38"}
SUN_DIST:        167.19 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.83d {+16h 15m 19s}  -18.40d {-18d 23' 59"}
MOON_DIST:        89.83 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.44, 59.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      154.61, 10.38 [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 = 156.39,-4.47 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:37:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 42"} (J2000)
POINT_ROLL:      57.666d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48878.37 SOD {13:34:38.37} UT,   124.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.613
N_STARS:         13
X_OFFSET:        784 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1743 [pixels]
Y_MAX:           1223 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00956824000msufc0124.fits
SUN_POSTN:       329.54d {+21h 58m 10s}  -12.39d {-12d 23' 37"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.84d {+16h 15m 22s}  -18.40d {-18d 24' 07"}
MOON_DIST:        89.86 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:37:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 42"} (J2000)
POINT_ROLL:      57.666d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48878.37 SOD {13:34:38.37} UT,   124.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.613
N_STARS:         13
X_OFFSET:        784 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1743 [pixels]
Y_MAX:           1223 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00956824000msufc0124.fits
SUN_POSTN:       329.54d {+21h 58m 10s}  -12.39d {-12d 23' 36"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.84d {+16h 15m 22s}  -18.40d {-18d 24' 09"}
MOON_DIST:        89.86 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [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:     Sun 16 Feb 20 13:39:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 42"} (J2000)
ROLL:            57.666d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48878.37 SOD {13:34:38.37} UT,   124.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     603552902
X_OFFSET:        949 [pixels]
Y_OFFSET:        428 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1109
Y_GRB_POS:       588
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0149.fits
SUN_POSTN:       329.54d {+21h 58m 10s}  -12.39d {-12d 23' 35"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.86d {+16h 15m 26s}  -18.41d {-18d 24' 21"}
MOON_DIST:        89.88 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [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:     Sun 16 Feb 20 13:39:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 42"} (J2000)
ROLL:            57.666d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48878.37 SOD {13:34:38.37} UT,   124.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     603552902
X_OFFSET:        949 [pixels]
Y_OFFSET:        428 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1109
Y_GRB_POS:       588
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0149.fits
SUN_POSTN:       329.54d {+21h 58m 10s}  -12.39d {-12d 23' 35"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.86d {+16h 15m 26s}  -18.41d {-18d 24' 23"}
MOON_DIST:        89.88 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [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:     Sun 16 Feb 20 13:45:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
POINT_ROLL:      57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49090.36 SOD {13:38:10.36} UT,   336.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.655
N_STARS:         6
X_OFFSET:        629 [pixels]
Y_OFFSET:        108 [pixels]
X_MAX:           1588 [pixels]
Y_MAX:           1067 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00956824000msufc0336.fits
SUN_POSTN:       329.55d {+21h 58m 11s}  -12.39d {-12d 23' 30"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.92d {+16h 15m 40s}  -18.42d {-18d 25' 16"}
MOON_DIST:        89.94 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:45:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
POINT_ROLL:      57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49090.36 SOD {13:38:10.36} UT,   336.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.655
N_STARS:         6
X_OFFSET:        629 [pixels]
Y_OFFSET:        108 [pixels]
X_MAX:           1588 [pixels]
Y_MAX:           1067 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00956824000msufc0336.fits
SUN_POSTN:       329.55d {+21h 58m 11s}  -12.39d {-12d 23' 29"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.92d {+16h 15m 41s}  -18.42d {-18d 25' 19"}
MOON_DIST:        89.94 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:47:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
ROLL:            57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49090.36 SOD {13:38:10.36} UT,   336.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     603553114
X_OFFSET:        949 [pixels]
Y_OFFSET:        428 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1109
Y_GRB_POS:       588
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0361.fits
SUN_POSTN:       329.55d {+21h 58m 11s}  -12.39d {-12d 23' 28"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.93d {+16h 15m 44s}  -18.42d {-18d 25' 28"}
MOON_DIST:        89.95 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [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:     Sun 16 Feb 20 13:47:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.418d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
ROLL:            57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49090.36 SOD {13:38:10.36} UT,   336.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     603553114
X_OFFSET:        949 [pixels]
Y_OFFSET:        428 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1109
Y_GRB_POS:       588
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0361.fits
SUN_POSTN:       329.55d {+21h 58m 11s}  -12.39d {-12d 23' 28"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.93d {+16h 15m 44s}  -18.43d {-18d 25' 29"}
MOON_DIST:        89.95 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.59, 10.32 [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 #27100
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University)
MASTER-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 GRB200216.56 (trigger No 956824,10h 41m 50.64s , +19d 27m 14.4s, R=0.05) errorbox 18 sec after notice time and 38 sec after trigger time at 2020-02-16 13:33:12 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 46 deg. The sun altitude is -43.8 deg.
MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB200216.56 errorbox 49 sec after notice time and 69 sec after trigger time at 2020-02-16 13:33:43 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 61 deg. The sun altitude is -30.3 deg.
The galactic latitude b = 60 deg., longitude l = 221 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1289334
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      43 |         MASTER-Amur |  P/ |    10 | 17.0 |        
      64 |         MASTER-Amur |  P/ |    10 | 16.8 |        
      75 |        MASTER-Tunka |  P| |    10 | 16.2 |        
      90 |         MASTER-Amur |  P/ |    20 | 16.9 |        
     109 |        MASTER-Tunka |  P| |    20 | 16.3 |        
     121 |         MASTER-Amur |  P/ |    20 | 16.8 |        
     149 |        MASTER-Tunka |  P| |    20 | 16.3 |        
     157 |         MASTER-Amur |  P/ |    30 | 17.4 |        
     193 |        MASTER-Tunka |  P| |    30 | 16.8 |        
     207 |         MASTER-Amur |  P/ |    40 | 17.3 |        
     258 |        MASTER-Tunka |  P| |    50 | 17.2 |        
     264 |         MASTER-Amur |  P/ |    50 | 17.6 |        
     334 |         MASTER-Amur |  P/ |    60 | 17.3 |        
```
The observation and reduction will continue. The message may be cited.
GCN Circular #27100
The Fermi GBM team reports the detection of a likely LONG GRB
At 13:32:34 UT on 16 Feb 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200216B (trigger 603552759.75478 / 200216564).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 159.2, Dec = 21.0 (J2000 degrees, equivalent to J2000 10h 36m, 21d 00'), with a statistical uncertainty of 6.5 degrees.
The angle from the Fermi LAT boresight is 78.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_skymap_all_bn200216564.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_healpix_all_bn200216564.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200216564/quicklook/glg_lc_medres34_bn200216564.gif

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:46:18 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     956824,   Seg_Num: 0
GRB_RA:          160.4342d {+10h 41m 44.20s} (J2000),
                 160.7052d {+10h 42m 49.25s} (current),
                 159.7599d {+10h 39m 02.38s} (1950)
GRB_DEC:         +19.4755d {+19d 28' 31.8"} (J2000),
                 +19.3698d {+19d 22' 11.4"} (current),
                 +19.7373d {+19d 44' 14.1"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  48967.00 SOD {13:36:07.00} UT,   213.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       329.55d {+21h 58m 11s}  -12.39d {-12d 23' 29"}
SUN_DIST:        167.21 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.92d {+16h 15m 42s}  -18.42d {-18d 25' 22"}
MOON_DIST:        89.95 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.39, 59.35 [deg] galactic lon,lat of the burst
ECL_COORDS:      154.57, 10.39 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:51:11 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.417d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
POINT_ROLL:      57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49619.52 SOD {13:46:59.52} UT,   865.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.588
N_STARS:         30
X_OFFSET:        389 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1828 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00956824000msufc0865.fits
SUN_POSTN:       329.55d {+21h 58m 12s}  -12.39d {-12d 23' 25"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.97d {+16h 15m 53s}  -18.43d {-18d 26' 03"}
MOON_DIST:        89.99 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.58, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:51:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.417d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
POINT_ROLL:      57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49619.52 SOD {13:46:59.52} UT,   865.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.588
N_STARS:         30
X_OFFSET:        389 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1828 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00956824000msufc0865.fits
SUN_POSTN:       329.55d {+21h 58m 12s}  -12.39d {-12d 23' 25"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.97d {+16h 15m 54s}  -18.44d {-18d 26' 05"}
MOON_DIST:        89.99 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.58, 10.32 [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:     Sun 16 Feb 20 13:52:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.417d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
ROLL:            57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49619.52 SOD {13:46:59.52} UT,   865.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     603553643
X_OFFSET:        948 [pixels]
Y_OFFSET:        559 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1108
Y_GRB_POS:       719
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0890.fits
SUN_POSTN:       329.55d {+21h 58m 12s}  -12.39d {-12d 23' 24"}
SUN_DIST:        167.25 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.98d {+16h 15m 56s}  -18.44d {-18d 26' 15"}
MOON_DIST:        90.00 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.58, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Feb 20 13:52:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     956824,   Seg_Num: 0
POINT_RA:        160.417d {+10h 41m 40s} (J2000)
POINT_DEC:       +19.412d {+19d 24' 43"} (J2000)
ROLL:            57.663d
IMG_START_DATE:  18895 TJD;    47 DOY;   20/02/16
IMG_START_TIME:  49619.52 SOD {13:46:59.52} UT,   865.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     603553643
X_OFFSET:        948 [pixels]
Y_OFFSET:        559 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1108
Y_GRB_POS:       719
BINNING_INDEX:   1
IM_URL:          sw00956824000msuni0890.fits
SUN_POSTN:       329.55d {+21h 58m 12s}  -12.39d {-12d 23' 23"}
SUN_DIST:        167.26 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      243.99d {+16h 15m 57s}  -18.44d {-18d 26' 17"}
MOON_DIST:        90.01 [deg]
MOON_ILLUM:      43 [%]
GAL_COORDS:      220.49, 59.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      154.58, 10.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #27102
P. D'Avanzo (INAF-OAB), M. G. Bernardini (INAF-OAB), J.D. Gropp (PSU), J. A. Kennea (PSU), N. J. Klingler (PSU), A. Y. Lien (GSFC/UMBC), T. Sbarrato (INAF-OAB) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 13:32:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200216B (trigger=956824). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 160.461, +19.454 which is
```
   RA(J2000) = 10h 41m 51s
   Dec(J2000) = +19d 27' 15"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed one long peak with a duration of about 30 sec, there is possible evidence for weaker emission out to T0+60 seconds. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 13:34:29.0 UT, 115.1 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 160.4343, 19.4757 which is equivalent to:
```
   RA(J2000)  = 10h 41m 44.23s
   Dec(J2000) = +19d 28' 32.4"
```
with an uncertainty of 2.0 arcseconds (radius, 90% containment). This location is 119 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 (2.03 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 9.9 (+3.22/-2.80) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.33e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 124 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo AT inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)
GCN Circular #27103
J. Mao, D.-Q. Wang, and J.-M. Bai (YNAO) report:
We observed the field of GRB 200216B (D'Avanzo et al. GCN circ. 27102) with the 2.4-meter optical telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. The observation began at UT 13:46:56, 16th, Feb, 2020, about 14 min after the trigger. We did not detect any optical source in the Swift-XRT error circle. A preliminary measurement provided an upper limit of R~21.8.
GCN Circular #27104
D. Xu, Z.P. Zhu, X. Liu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1 Senior High School) report:
We observed the field of GRB 200216B (D'Avanzo et al., GCN 27102) using the NEXT 0.6m optical telescope located at Nanshan, Xinjiang, China. Observations automatically started at 13:33:46 UT on 2002-02-16, i.e., 73 s after the BAT trigger. We obtained 3x40 s, 4x60 s, 3x90 s and onging 200 s frames in the Sloan r-filter. The altitude for the GRB and the weather has been improving.
No optical afterglow is detected in our images at the XRT position (D'Avanzo et al., GCN 27102) down to a limiting magnitude of r~20.0.
Meanwhile, we note that there exists a very marginally detected blob (thus noise fluctuation not ruled out yet), extended and being positionally consistent with the XRT position both in PanSTAR r-band field, centred at coordinates: R.A. (J2000) = 10:41:44.23, Dec. (J2000) = +19:28:33.18. The source would be of r~23 in depth, and might be the host galaxy of the GRB. Deep imaging would identify the nature of the blob.

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Jochen Greiner, last update: 16-Feb-2020 [Disclaimer]