Gamma-ray Burst 200711A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:04:59 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     981957,   Seg_Num: 0
GRB_RA:          285.977d {+19h 03m 54s} (J2000),
                 286.240d {+19h 04m 58s} (current),
                 285.335d {+19h 01m 20s} (1950)
GRB_DEC:          -0.136d {-00d 08' 09"} (J2000),
                  -0.104d {-00d 06' 15"} (current),
                  -0.211d {-00d 12' 40"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4875 [cnts]    Image_Peak=118 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   155     E_range: 50-350 keV
BKG_INTEN:       14472 [cnts]
BKG_TIME:        39862.73 SOD {11:04:22.73} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39876.49 SOD {11:04:36.49} UT
GRB_PHI:          99.03 [deg]
GRB_THETA:        38.87 [deg]
SOLN_STATUS:     0x20000083
RATE_SIGNIF:     65.96 [sigma]
IMAGE_SIGNIF:    6.78 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3  -3  +0  +1 +92  +0 
SUN_POSTN:       111.22d {+07h 24m 52s}  +22.00d {+22d 00' 12"}
SUN_DIST:        157.57 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.86d {+00h 19m 25s}   -3.61d {-03d 36' 33"}
MOON_DIST:        78.63 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.23, -2.84 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      287.31, 22.35 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 209.21,20.46 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(2.0<100sec) coincident with the CALET_GBM event (trignum=1278500601).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:05:07 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     616158277
GRB_RA:          292.117d {+19h 28m 28s} (J2000),
                 292.377d {+19h 29m 31s} (current),
                 291.482d {+19h 25m 56s} (1950)
GRB_DEC:          +1.233d {+01d 13' 60"} (J2000),
                  +1.277d {+01d 16' 36"} (current),
                  +1.130d {+01d 07' 48"} (1950)
GRB_ERROR:       5.58 [deg radius, statistical plus systematic]
GRB_INTEN:       948 [cnts/sec]
DATA_SIGNIF:     51.80 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39872.93 SOD {11:04:32.93} UT
GRB_PHI:         185.00 [deg]
GRB_THETA:        80.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.61
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      89%  GRB
2nd_MOST_LIKELY:   4%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 1,1,0, 1,0,0, 0,0,
SUN_POSTN:       111.22d {+07h 24m 52s}  +22.00d {+22d 00' 12"}
SUN_DIST:        156.69 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:        4.86d {+00h 19m 26s}   -3.61d {-03d 36' 31"}
MOON_DIST:        72.60 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       38.29, -7.66 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      294.11, 22.84 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 127.60,-24.50 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=981957).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:05:03 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     616158277
GRB_RA:          292.100d {+19h 28m 24s} (J2000),
                 292.361d {+19h 29m 27s} (current),
                 291.464d {+19h 25m 51s} (1950)
GRB_DEC:          +1.100d {+01d 06' 00"} (J2000),
                  +1.143d {+01d 08' 36"} (current),
                  +0.997d {+00d 59' 48"} (1950)
GRB_ERROR:       16.98 [deg radius, statistical plus systematic]
GRB_INTEN:       232 [cnts/sec]
DATA_SIGNIF:     9.20 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39872.93 SOD {11:04:32.93} UT
GRB_PHI:         185.00 [deg]
GRB_THETA:        80.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.78
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      78%  GRB
2nd_MOST_LIKELY:  14%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 1,1,0, 1,0,0, 0,0,
SUN_POSTN:       111.22d {+07h 24m 52s}  +22.00d {+22d 00' 12"}
SUN_DIST:        156.83 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:        4.86d {+00h 19m 26s}   -3.61d {-03d 36' 32"}
MOON_DIST:        72.61 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       38.16, -7.71 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      294.07, 22.71 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 127.60,-24.50 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=981957).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:05:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     616158277
GRB_RA:          288.820d {+19h 15m 17s} (J2000),
                 289.083d {+19h 16m 20s} (current),
                 288.179d {+19h 12m 43s} (1950)
GRB_DEC:          -0.100d {-00d 06' 00"} (J2000),
                  -0.063d {-00d 03' 45"} (current),
                  -0.188d {-00d 11' 17"} (1950)
GRB_ERROR:       2.56 [deg radius, statistical only]
DATA_SIGNIF:     40.70 [sigma]
DATA_INTERVAL:   1.024 [sec]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39872.93 SOD {11:04:32.93} UT
GRB_PHI:         188.00 [deg]
GRB_THETA:        78.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       111.22d {+07h 24m 52s}  +22.00d {+22d 00' 12"}
SUN_DIST:        157.96 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:        4.86d {+00h 19m 26s}   -3.61d {-03d 36' 29"}
MOON_DIST:        75.80 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       35.57, -5.35 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      290.36, 22.02 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_616158277.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(4.0<100sec) coincident with the SWIFT_BAT event (trignum=981957).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:06:07 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     616158277
GRB_RA:          286.890d {+19h 07m 34s} (J2000),
                 287.153d {+19h 08m 37s} (current),
                 286.250d {+19h 05m 00s} (1950)
GRB_DEC:          +0.220d {+00d 13' 12"} (J2000),
                  +0.253d {+00d 15' 12"} (current),
                  +0.141d {+00d 08' 26"} (1950)
GRB_ERROR:       1.81 [deg radius, statistical only]
DATA_SIGNIF:     52.00 [sigma]
DATA_INTERVAL:   6.144 [sec]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39872.93 SOD {11:04:32.93} UT
GRB_PHI:         190.00 [deg]
GRB_THETA:        78.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       111.22d {+07h 24m 52s}  +22.00d {+22d 00' 12"}
SUN_DIST:        157.39 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.86d {+00h 19m 28s}   -3.61d {-03d 36' 19"}
MOON_DIST:        77.75 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.97, -3.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.34, 22.59 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_616158277.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
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(4.0<100sec) coincident with the SWIFT_BAT event (trignum=981957).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:13:56 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     616158277
GRB_RA:          287.110d {+19h 08m 26s} (J2000),
                 287.370d {+19h 09m 29s} (current),
                 286.475d {+19h 05m 54s} (1950)
GRB_DEC:          +1.300d {+01d 18' 00"} (J2000),
                  +1.334d {+01d 20' 02"} (current),
                  +1.220d {+01d 13' 10"} (1950)
GRB_ERROR:       1.59 [deg radius, statistical only]
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39872.93 SOD {11:04:32.93} UT
GRB_PHI:         190.00 [deg]
GRB_THETA:        79.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       111.22d {+07h 24m 54s}  +22.00d {+22d 00' 09"}
SUN_DIST:        156.36 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.92d {+00h 19m 42s}   -3.58d {-03d 34' 45"}
MOON_DIST:        77.67 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       36.03, -3.19 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.73, 23.63 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_locplot_all_bn200711461.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(4.0<100sec) coincident with the SWIFT_BAT event (trignum=981957).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:08:02 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     981957,   Seg_Num: 0
GRB_RA:          285.977d {+19h 03m 54s} (J2000),
                 286.240d {+19h 04m 58s} (current),
                 285.335d {+19h 01m 20s} (1950)
GRB_DEC:          -0.136d {-00d 08' 09"} (J2000),
                  -0.104d {-00d 06' 15"} (current),
                  -0.211d {-00d 12' 40"} (1950)
GRB_DATE:        19041 TJD;   193 DOY;   20/07/11
GRB_TIME:        39876.49 SOD {11:04:36.49} UT
TRIGGER_INDEX:   155
GRB_PHI:          99.03 [deg]
GRB_THETA:        38.87 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     65.96 [sigma]
IMAGE_SIGNIF:    6.78 [sigma]
LC_URL:          sw00981957000msb.lc
SUN_POSTN:       111.22d {+07h 24m 53s}  +22.00d {+22d 00' 11"}
SUN_DIST:        157.57 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.88d {+00h 19m 31s}   -3.60d {-03d 35' 56"}
MOON_DIST:        78.66 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.23, -2.84 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      287.31, 22.35 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 209.21,20.46 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:07:32 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.148d {-00d 08' 51"} (J2000)
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40042.81 SOD {11:07:22.81} UT,   166.3 [sec] since BAT Trigger Time
COUNTS:          9    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        3    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:11:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.148d {-00d 08' 52"} (J2000)
POINT_ROLL:      347.208d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40046.10 SOD {11:07:26.10} UT,   169.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.992
N_STARS:         190
X_OFFSET:        395 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1354 [pixels]
Y_MAX:           959 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00981957000msufc0169.fits
SUN_POSTN:       111.22d {+07h 24m 53s}  +22.00d {+22d 00' 10"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.90d {+00h 19m 37s}   -3.59d {-03d 35' 17"}
MOON_DIST:        78.59 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:11:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.148d {-00d 08' 52"} (J2000)
POINT_ROLL:      347.208d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40046.10 SOD {11:07:26.10} UT,   169.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.992
N_STARS:         190
X_OFFSET:        395 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1354 [pixels]
Y_MAX:           959 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00981957000msufc0169.fits
SUN_POSTN:       111.22d {+07h 24m 53s}  +22.00d {+22d 00' 10"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.91d {+00h 19m 37s}   -3.59d {-03d 35' 15"}
MOON_DIST:        78.60 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #28077
The Fermi GBM team reports the detection of a likely LONG GRB
At 11:04:32 UT on 11 Jul 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200711A (trigger 616158277.930672 / 200711461).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 287.1, Dec = 1.3 (J2000 degrees, equivalent to J2000 19h 08m, 1d 18'), with a statistical uncertainty of 1.6 degrees.
The angle from the Fermi LAT boresight is 79.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_skymap_all_bn200711461.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/bn200711461/quicklook/glg_healpix_all_bn200711461.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200711461/quicklook/glg_lc_medres34_bn200711461.gif

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:21:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.149d {-00d 08' 56"} (J2000)
POINT_ROLL:      347.211d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40750.35 SOD {11:19:10.35} UT,   873.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.410
N_STARS:         190
X_OFFSET:        155 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1594 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00981957000msufc0873.fits
SUN_POSTN:       111.23d {+07h 24m 55s}  +22.00d {+22d 00' 07"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.98d {+00h 19m 56s}   -3.55d {-03d 33' 12"}
MOON_DIST:        78.67 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:21:59 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.149d {-00d 08' 56"} (J2000)
POINT_ROLL:      347.211d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40750.35 SOD {11:19:10.35} UT,   873.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.410
N_STARS:         190
X_OFFSET:        155 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           1594 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00981957000msufc0873.fits
SUN_POSTN:       111.23d {+07h 24m 55s}  +22.00d {+22d 00' 07"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.98d {+00h 19m 56s}   -3.55d {-03d 33' 08"}
MOON_DIST:        78.67 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [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 11 Jul 20 11:24:07 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.149d {-00d 08' 56"} (J2000)
ROLL:            347.211d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40750.35 SOD {11:19:10.35} UT,   873.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616159175
X_OFFSET:        714 [pixels]
Y_OFFSET:        559 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       874
Y_GRB_POS:       719
BINNING_INDEX:   1
IM_URL:          sw00981957000msuni0899.fits
SUN_POSTN:       111.23d {+07h 24m 55s}  +22.00d {+22d 00' 06"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        5.00d {+00h 20m 00s}   -3.55d {-03d 32' 43"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:24:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.149d {-00d 08' 56"} (J2000)
ROLL:            347.211d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40750.35 SOD {11:19:10.35} UT,   873.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616159175
X_OFFSET:        714 [pixels]
Y_OFFSET:        559 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       874
Y_GRB_POS:       719
BINNING_INDEX:   1
IM_URL:          sw00981957000msuni0899.fits
SUN_POSTN:       111.23d {+07h 24m 55s}  +22.00d {+22d 00' 06"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        5.00d {+00h 20m 01s}   -3.54d {-03d 32' 40"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [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 #28078
F. E. Marshall (NASA/GSFC), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), J.D. Gropp (PSU), N. J. Klingler (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 11:04:36 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200711A (trigger=981957). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 285.977, -0.136, which is
```
   RA(J2000)  =  19h 03m 54s
   Dec(J2000) = -00d 08' 09"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed multiple peaks with a duration of about 30 sec. The peak count rate was ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 11:07:22.8 UT, 166.3 seconds after the BAT trigger. Due to a poor slew, the promptly downlinked data only cover 30% of the BAT error circle. No source was detected in 779 s within the small part of the BAT error region covered. We are waiting for the full dataset covering the full field of view to detect and localise the XRT counterpart.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 169 seconds after the BAT trigger. This is a very crowded region with large extinction. No credible afterglow candidate has been found in the initial data products.
Burst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:14:18 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.148d {-00d 08' 52"} (J2000)
ROLL:            347.208d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40046.10 SOD {11:07:26.10} UT,   169.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616158471
X_OFFSET:        714 [pixels]
Y_OFFSET:        319 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       874
Y_GRB_POS:       479
BINNING_INDEX:   1
IM_URL:          sw00981957000msuni0195.fits
SUN_POSTN:       111.22d {+07h 24m 54s}  +22.00d {+22d 00' 09"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.93d {+00h 19m 42s}   -3.58d {-03d 34' 41"}
MOON_DIST:        78.62 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Jul 20 11:14:26 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     981957,   Seg_Num: 0
POINT_RA:        286.062d {+19h 04m 15s} (J2000)
POINT_DEC:        -0.148d {-00d 08' 52"} (J2000)
ROLL:            347.208d
IMG_START_DATE:  19041 TJD;   193 DOY;   20/07/11
IMG_START_TIME:  40046.10 SOD {11:07:26.10} UT,   169.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616158471
X_OFFSET:        714 [pixels]
Y_OFFSET:        319 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       874
Y_GRB_POS:       479
BINNING_INDEX:   1
IM_URL:          sw00981957000msuni0195.fits
SUN_POSTN:       111.22d {+07h 24m 54s}  +22.00d {+22d 00' 09"}
SUN_DIST:        157.60 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:        4.93d {+00h 19m 43s}   -3.58d {-03d 34' 39"}
MOON_DIST:        78.62 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:       34.26, -2.92 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      287.40, 22.33 [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 #28079
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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB 200711A ( F. E. Marshall et al., GCN 28078) errorbox 26829 sec after notice time and 26854 sec after trigger time at 2020-07-11 18:32:11 UT, with upper limit up to 15.9 mag. Observations started at twilight. The observations began at zenith distance = 59 deg. The sun altitude is -10.2 deg.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB 200711A errorbox 26939 sec after notice time and 26964 sec after trigger time at 2020-07-11 18:34:00 UT, with upper limit up to 16.7 mag. Observations started at twilight. The observations began at zenith distance = 54 deg. The sun altitude is -15.0 deg.
The galactic latitude b = -3 deg., longitude l = 35 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1399126
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   26945 |      MASTER-Tavrida |   C |   180 | 15.9 |        
   26994 |   MASTER-Kislovodsk |   C |    60 | 16.7 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #28080
S.Poolakkil (UAH), E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 11:04:32.93 UT on 11 July 2020, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 200711A(trigger 616158277 / 200711461), which was also detected by the Swift/BAT (Marshall et al. 2020, GCN 28078). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 77 degrees.
The GBM light curve consists of a single bright pulse followed by some extended emission with a duration (T90) of about 29 s (50-300 keV). The time-averaged spectrum from T0 s to T0+24.58 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.04 +/- 0.03 and the cutoff energy, parameterized as Epeak, is 287 +/- 18 keV. A Band function fits equally well, with Epeak = 215 +/- 23 keV, alpha = -0.95 +/- 0.05 and beta = -2.04 +/- 0.10.
The event fluence (10-1000 keV) in this time interval is (1.510 +/- 0.042)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.64 s in the 10-1000 keV band is 16.3 +/- 0.3 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 #28081
J.P. Osborne (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (ASDC), V. D'Elia (ASDC), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and F.E. Marshall report on behalf of the Swift-XRT team:
We have analysed 6.9 ks of XRT data for GRB 200711A (Marshall et al. GCN Circ. 28078), from 150 s to 40.4 ks after the BAT trigger. The data comprise 29 s in Windowed Timing (WT) mode (the first 10 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. Using 1145 s of PC mode data and 2 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 285.97020, -0.14708 which is equivalent to:
```
RA (J2000): 19h 03m 52.85s
Dec(J2000): -00d 08' 49.5"
```
with an uncertainty of 1.6 arcsec (radius, 90% confidence).
The light curve can be modelled with an initial power-law decay with an index of alpha=0.51 (+0.13, -0.14), followed by a break at T+3349 s to an alpha of 1.41 (+/-0.09).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.01 (+0.22, -0.21). The best-fitting absorption column is 1.65 (+0.30, -0.27) x 10^22 cm^-2, in excess of the Galactic value of 5.7 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.6 x 10^-11 (1.2 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.65 (+0.30, -0.27) x 10^22 cm^-2
Galactic foreground: 5.7 x 10^21 cm^-2
Excess significance: 6.5 sigma
Photon index:	     2.01 (+0.22, -0.21)
```
If the light curve continues to decay with a power-law decay index of 1.41, the count rate at T+24 hours will be 9.6 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.4 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/00981957.
This circular is an official product of the Swift-XRT team.
GCN Circular #28082
WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to GRB 200711A (GBM detection: GCN 28077; Swfit detection: Marshall et al., GCN 28078) starting at ~0.90 hours after the Swfit trigger, and again on the second night around 0.81 days after burst. Observations were performed in the clear (roughly R) filters, and the exposure time was 20 s per image. We do not detect any optical afterglow candidate within the enhanced XRT position error circle (Osborne et al., GCN 28081), neither in the first night image with upper limit of ~17.5 mag calibrated to the Pan-STARRS1 catalog, nor in the second night co-added image with upper limit of ~20.0 mag.
GCN Circular #28083
M. Crnogorcevic (Univ. of Maryland & NASA/GSFC), M. Kovacevic (INFN Perugia), M. Ohno (Hiroshima Univ.), F. Longo (University & INFN Trieste), report on behalf of the Fermi-LAT Collaboration:
On July, 11th, 2020, Fermi-LAT detected high-energy emission from GRB 200711A, which was also detected by Fermi-GBM (trigger 616158277/200711461; Poolakkil et al. GCN 28080) and Swift-BAT (Marshall et al. GCN 28078).
The best LAT on-ground location is found to be RA, Dec = 285.8, 0.2 (degrees, J2000) with an error radius of 0.4 deg (90% containment, statistical error only). The 95% containment error is consistent with the Swift-XRT position (Osborne et al. GCN 28081).
This GRB was outside LAT FoV at the trigger time of the GBM and came into the LAT FoV around 200 s after the trigger. The data from the Fermi-LAT in the time interval 200-600 s after the GBM trigger at the Swift-XRT position show a marginal increase of the detection significance of the high energy (GeV) photons for this burst.
The photon flux above 100 MeV in the time interval 200 - 600 s after the GBM trigger is 3.3e-6 +/- 1.9e-6 ph/cm2/s.
The highest-energy photon is a 5.7 GeV event which is observed 542 seconds after the GBM trigger.
The Fermi-LAT point of contact for this burst is Milena Crnogorcevic (mcrnogor@astro.umd.edu).
The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN Circular #28084
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200711A (trigger #981957) (Marshall et al., GCN Circ. 28078). The BAT ground-calculated position is RA, Dec = 285.975, -0.134 deg which is
```
   RA(J2000)  =  19h 03m 53.9s
   Dec(J2000) = -00d 08' 04.1"
```
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 8%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~T-5 s and ends at ~T+30 s. The three major peaks occur at ~T0, ~T+5 s, and ~T+20 s, respectively. T90 (15-350 keV) is 29.39 +- 3.07 sec (estimated error including systematics).
The time-averaged spectrum from T-4.72 to T+29.73 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.42 +- 0.10. The fluence in the 15-150 keV band is 5.3 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.20 sec in the 15-150 keV band is 7.7 +- 1.0 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/981957/BA/
GCN Circular #28085
GRB 200711A: Swift/UVOT Upper Limits
K. K. Simpson (PSU) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200711A 170 s after the BAT trigger (Marshall et al., GCN Circ. 28078). No optical afterglow consistent with the BAT position (Marshall et al. GCN Circ 28078) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           170          319          147         >20.2
white              170          999          310         >20.6
v                  404         4651          255         >18.7
b                  503          868           58         >19.1
u                  477         5088           80         >19.0
w1                 453         5061          255         >19.3
m2                 428          448           19         >18.0
w2                 379         4446          255         >19.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.96 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #28086
A. Pozanenko (IKI), N. Pankov (HSE), K. Kamyshnikov (HSE), R. Ya. Inasaridze (AbAO), V.R. Ayvazian (AbAO), G. V. Kapanadze (AbAO), S. Belkin (IKI), E. Mazaeva (IKI), A. Volnova (IKI), I. Molotov (KIAM) report on behalf of GRB IKI FuN:
We observed the field of GRB 200711A (Fermi GBM Team, GCN 28077; Marshall et al., GCN 28078; Crnogorcevic et al., GCN 28083) with AS-32 (0.7m) telescope of Abastumani Observatory starting on 2020-07-11 (UT) 23:05:40. We do not detect any object within the enhanced XRT position error circle (Osborne et al., GCN 28081). Preliminary photometry of the field is following.
```
Date       UT start  t-T0    Filter Exp.  OT    Err. UL
                     (mid, days)     (s)
2020-07-11 23:05:40  0.50074 R      49*60 n/d   n/d 21.3
```
The photometry is based on nearby USNO-B1.0 stars
GCN Circular #28087
Y. Asaoka (Waseda U), A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration:
The long GRB 200711A (Swift detection: Marshall et al., GCN Circ. 28078; Fermi GBM detection: Poolakkil et al., GCN Circ. 28080; Fermi-LAT detection: Crnogorcevic et al., GCN Circ. 28083; https://gcn.gsfc.nasa.gov/other/200711A.gcn3) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 11:04:34.187 UTC on 11 July 2020 (http://cgbm.calet.jp/cgbm_trigger/flight/1278500601/). The burst signal was seen only by the SGM detector.
The burst light curve shows a weak pulse which starts at T-0.9 sec and ends at T+4.0 sec. The T90 and T50 durations measured by the SGM data are 4.2 +- 1.3 sec and 2.1 +- 1.3 sec (40-1000 keV), respectively.
The ground processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1278500601/
The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.
GCN Circular #28094
S. Xiao, C. Cai, Y. F. Du, Y. G. Zheng, Q. Luo, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team:
At 2020-07-11T11:04:32.93 (T0), Insight-HXMT/HE detected GRB 200711A (trigger ID: HEB200711461) in a routine search of the data, which also triggered Fermi-GBM (Poolakkil et al. GCN 28080) and Swift-BAT (Marshall et al. GCN 28078).
The Insight-HXMT/HE light curve mainly consists of single pulse with a duration (T90) of 9.15 s measured from T0-0.64 s. The 1-ms peak rate, measured from T0+3.56 s, is 1098 cnts/sec. The total counts from this burst is 3109 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200711461_lc.jpg
All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope.
Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.

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Jochen Greiner, last update: 14-Jul-2020 [Disclaimer]