Gamma-ray Burst 191011A

(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:     Fri 11 Oct 19 04:36:12 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     928924,   Seg_Num: 0
GRB_RA:           44.724d {+02h 58m 54s} (J2000),
                  44.936d {+02h 59m 45s} (current),
                  44.186d {+02h 56m 45s} (1950)
GRB_DEC:         -27.845d {-27d 50' 40"} (J2000),
                 -27.767d {-27d 46' 00"} (current),
                 -28.044d {-28d 02' 36"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2070 [cnts]    Image_Peak=188 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       20149 [cnts]
BKG_TIME:        16544.27 SOD {04:35:44.27} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18767 TJD;   284 DOY;   19/10/11
GRB_TIME:        16556.43 SOD {04:35:56.43} UT
GRB_PHI:         -27.58 [deg]
GRB_THETA:        18.85 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     21.07 [sigma]
IMAGE_SIGNIF:    11.04 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  +0  +0  +0 +71  +0 
SUN_POSTN:       196.21d {+13h 04m 50s}   -6.90d {-06d 53' 56"}
SUN_DIST:        135.59 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.83d {+23h 23m 19s}   -8.86d {-08d 51' 41"}
MOON_DIST:        54.24 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.85,-61.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       31.51,-42.53 [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 = 278.26,10.62 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=592461363).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:36:24 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     592461363
GRB_RA:           40.217d {+02h 40m 52s} (J2000),
                  40.405d {+02h 41m 37s} (current),
                  39.740d {+02h 38m 58s} (1950)
GRB_DEC:         -42.333d {-42d 19' 59"} (J2000),
                 -42.249d {-42d 14' 57"} (current),
                 -42.547d {-42d 32' 47"} (1950)
GRB_ERROR:       18.83 [deg radius, statistical plus systematic]
GRB_INTEN:       51 [cnts/sec]
DATA_SIGNIF:     4.90 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18767 TJD;   284 DOY;   19/10/11
GRB_TIME:        16558.58 SOD {04:35:58.58} UT
GRB_PHI:         120.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      2.12
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      76%  GRB
2nd_MOST_LIKELY:  23%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:       196.21d {+13h 04m 50s}   -6.90d {-06d 53' 57"}
SUN_DIST:        126.12 [deg]   Sun_angle= 10.4 [hr] (West of Sun)
MOON_POSTN:      350.83d {+23h 23m 19s}   -8.86d {-08d 51' 39"}
MOON_DIST:        54.70 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      254.38,-63.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       16.76,-53.88 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_lc_medres34_bn191011192.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 247.13,-13.00 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=928924).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:36:40 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     592461363
GRB_RA:           34.140d {+02h 16m 34s} (J2000),
                  34.334d {+02h 17m 20s} (current),
                  33.648d {+02h 14m 36s} (1950)
GRB_DEC:         -43.620d {-43d 37' 11"} (J2000),
                 -43.529d {-43d 31' 43"} (current),
                 -43.851d {-43d 51' 03"} (1950)
GRB_ERROR:       11.98 [deg radius, statistical only]
DATA_SIGNIF:     5.00 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        18767 TJD;   284 DOY;   19/10/11
GRB_TIME:        16558.58 SOD {04:35:58.58} UT
GRB_PHI:         126.00 [deg]
GRB_THETA:        21.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       196.21d {+13h 04m 50s}   -6.90d {-06d 53' 57"}
SUN_DIST:        126.97 [deg]   Sun_angle= 10.8 [hr] (West of Sun)
MOON_POSTN:      350.83d {+23h 23m 20s}   -8.86d {-08d 51' 36"}
MOON_DIST:        51.27 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      262.32,-66.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        9.32,-52.61 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_lc_medres34_bn191011192.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_592461363.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=928924).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:45:15 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     592461363
GRB_RA:          207.940d {+13h 51m 46s} (J2000),
                 208.111d {+13h 52m 27s} (current),
                 207.506d {+13h 50m 01s} (1950)
GRB_DEC:         +57.770d {+57d 46' 12"} (J2000),
                 +57.673d {+57d 40' 22"} (current),
                 +58.016d {+58d 00' 59"} (1950)
GRB_ERROR:       4.04 [deg radius, statistical only]
GRB_DATE:        18767 TJD;   284 DOY;   19/10/11
GRB_TIME:        16558.58 SOD {04:35:58.58} UT
GRB_PHI:         265.00 [deg]
GRB_THETA:       169.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       196.22d {+13h 04m 52s}   -6.90d {-06d 54' 05"}
SUN_DIST:         65.30 [deg]   Sun_angle= -0.8 [hr] (East of Sun)
MOON_POSTN:      350.90d {+23h 23m 36s}   -8.83d {-08d 50' 04"}
MOON_DIST:       123.41 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      107.94, 57.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      167.18, 61.11 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_lc_medres34_bn191011192.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_locplot_all_bn191011192.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=928924).

GCN NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Fri 11 Oct 19 04:37:17 UT 
NOTICE_TYPE:     Swift-XRT Nack-Position 
TRIGGER_NUM:     928924,   Seg_Num: 0 
POINT_RA:         44.695d {+02h 58m 47s} (J2000) 
POINT_DEC:       -27.834d {-27d 50' 02"} (J2000) 
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11 
IMG_START_TIME:  16631.18 SOD {04:37:11.18} UT,   74.8 [sec] since BAT Trigger Time 
COUNTS:          36    Min_needed= 20 
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec] 
PH2_ITER:        4    Max_iter_allowed= 4 
ERROR_CODE:      2 
COMMENTS:        SWIFT-XRT Nack Position.   
COMMENTS:        Algorithm did not converge; too many iterations.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:40:02 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     928924,   Seg_Num: 0
GRB_RA:           44.724d {+02h 58m 54s} (J2000),
                  44.936d {+02h 59m 45s} (current),
                  44.186d {+02h 56m 45s} (1950)
GRB_DEC:         -27.845d {-27d 50' 40"} (J2000),
                 -27.767d {-27d 46' 00"} (current),
                 -28.044d {-28d 02' 36"} (1950)
GRB_DATE:        18767 TJD;   284 DOY;   19/10/11
GRB_TIME:        16556.43 SOD {04:35:56.43} UT
TRIGGER_INDEX:   124
GRB_PHI:         -27.58 [deg]
GRB_THETA:        18.85 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     21.07 [sigma]
IMAGE_SIGNIF:    11.04 [sigma]
LC_URL:          sw00928924000msb.lc
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 00"}
SUN_DIST:        135.59 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.86d {+23h 23m 26s}   -8.85d {-08d 51' 00"}
MOON_DIST:        54.22 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.85,-61.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       31.51,-42.53 [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 = 278.26,10.62 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:40:18 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.695d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.834d {-27d 50' 02"} (J2000)
POINT_ROLL:      137.345d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16633.97 SOD {04:37:13.97} UT,   77.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.649
N_STARS:         10
X_OFFSET:        605 [pixels]
Y_OFFSET:        402 [pixels]
X_MAX:           1564 [pixels]
Y_MAX:           1361 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00928924000msufc0077.fits
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 00"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.86d {+23h 23m 27s}   -8.85d {-08d 50' 57"}
MOON_DIST:        54.19 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:40:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.695d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.834d {-27d 50' 02"} (J2000)
POINT_ROLL:      137.345d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16633.97 SOD {04:37:13.97} UT,   77.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.649
N_STARS:         10
X_OFFSET:        605 [pixels]
Y_OFFSET:        402 [pixels]
X_MAX:           1564 [pixels]
Y_MAX:           1361 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00928924000msufc0077.fits
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 00"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.86d {+23h 23m 27s}   -8.85d {-08d 50' 54"}
MOON_DIST:        54.19 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:41:32 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.695d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.834d {-27d 50' 02"} (J2000)
ROLL:            137.345d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16633.97 SOD {04:37:13.97} UT,   77.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     592461457
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0101.fits
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 01"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.87d {+23h 23m 29s}   -8.85d {-08d 50' 44"}
MOON_DIST:        54.19 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:41:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.695d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.834d {-27d 50' 02"} (J2000)
ROLL:            137.345d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16633.97 SOD {04:37:13.97} UT,   77.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     592461457
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0101.fits
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 02"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.87d {+23h 23m 29s}   -8.84d {-08d 50' 41"}
MOON_DIST:        54.19 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.52 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:41:36 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     928924,   Seg_Num: 0
GRB_RA:           44.7265d {+02h 58m 54.36s} (J2000),
                  44.9389d {+02h 59m 45.34s} (current),
                  44.1894d {+02h 56m 45.46s} (1950)
GRB_DEC:         -27.8460d {-27d 50' 45.6"} (J2000),
                 -27.7679d {-27d 46' 04.5"} (current),
                 -28.0447d {-28d 02' 40.9"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16640.00 SOD {04:37:20.00} UT,   83.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 01"}
SUN_DIST:        135.59 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.87d {+23h 23m 29s}   -8.85d {-08d 50' 43"}
MOON_DIST:        54.22 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.86,-61.80 [deg] galactic lon,lat of the burst
ECL_COORDS:       31.51,-42.54 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:42:42 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     928924,   Seg_Num: 0
GRB_RA:           44.7283d {+02h 58m 54.79s} (J2000),
                  44.9407d {+02h 59m 45.77s} (current),
                  44.1912d {+02h 56m 45.89s} (1950)
GRB_DEC:         -27.8454d {-27d 50' 43.4"} (J2000),
                 -27.7673d {-27d 46' 02.3"} (current),
                 -28.0441d {-28d 02' 38.7"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         20.20 +/- 0.19 [mag]
FILTER:          10, White
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16630.00 SOD {04:37:10.00} UT,   73.6 [sec] since BAT Trigger Time
SUN_POSTN:       196.21d {+13h 04m 51s}   -6.90d {-06d 54' 02"}
SUN_DIST:        135.59 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.88d {+23h 23m 31s}   -8.84d {-08d 50' 31"}
MOON_DIST:        54.21 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.85,-61.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       31.51,-42.54 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #25987
The Fermi GBM team reports the detection of a likely LONG GRB
At 04:35:58 UT on 11 Oct 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191011A (trigger 592461363.582334 / 191011192).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 207.9, Dec = 57.8 (J2000 degrees, equivalent to J2000 13h 51m, 57d 47'), with a statistical uncertainty of 4.0 degrees.
The angle from the Fermi LAT boresight is 169.0 degrees.
The skymap can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_skymap_all_bn191011192.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_healpix_all_bn191011192.fit
The GBM light curve can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191011192/quicklook/glg_lc_medres34_bn191011192.gif
GCN Circular #25988
S. L Laha (GSFC/UMBC/CRESST), C. Gronwall (PSU), J.D. Gropp (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (GSFC/UMBC), K. L. Page (U Leicester), D. M. Palmer (LANL) and E. Troja (NASA/GSFC/UMCP) report on behalf of the Neil Gehrels Swift Observatory Team:
At 04:35:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191011A (trigger=928924). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 44.724, -27.845 which is
```
   RA(J2000) = 02h 58m 54s
   Dec(J2000) = -27d 50' 40"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex peak structure with a duration of about 20 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 04:37:11.1 UT, 74.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 44.72679, -27.84594 which is equivalent to:
```
   RA(J2000)  = 02h 58m 54.43s
   Dec(J2000) = -27d 50' 45.4"
```
with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 9.5 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 http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.54 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 5.8 (+3.35/-2.89) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 77 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	02:58:54.80 =  44.72832
  DEC(J2000) = -27:50:43.5  = -27.84541
```
with a 90%-confidence error radius of about 0.83 arc sec. This position is 6.1 arc sec. from the center of the XRT error circle. The estimated magnitude is 20.20 with a 1-sigma error of about 0.19. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is S. L Laha (sib.laha AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:48:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
POINT_ROLL:      137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16846.09 SOD {04:40:46.09} UT,   289.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.448
N_STARS:         47
X_OFFSET:        365 [pixels]
Y_OFFSET:        162 [pixels]
X_MAX:           1804 [pixels]
Y_MAX:           1601 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00928924000msufc0289.fits
SUN_POSTN:       196.22d {+13h 04m 52s}   -6.90d {-06d 54' 08"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.93d {+23h 23m 43s}   -8.82d {-08d 49' 26"}
MOON_DIST:        54.15 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:49:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
POINT_ROLL:      137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16846.09 SOD {04:40:46.09} UT,   289.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.448
N_STARS:         47
X_OFFSET:        365 [pixels]
Y_OFFSET:        162 [pixels]
X_MAX:           1804 [pixels]
Y_MAX:           1601 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00928924000msufc0289.fits
SUN_POSTN:       196.22d {+13h 04m 52s}   -6.90d {-06d 54' 09"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.93d {+23h 23m 43s}   -8.82d {-08d 49' 21"}
MOON_DIST:        54.15 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:49:55 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
ROLL:            137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16846.09 SOD {04:40:46.09} UT,   289.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     592461669
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0313.fits
SUN_POSTN:       196.22d {+13h 04m 52s}   -6.90d {-06d 54' 09"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.94d {+23h 23m 45s}   -8.82d {-08d 49' 14"}
MOON_DIST:        54.14 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:50:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
ROLL:            137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16846.09 SOD {04:40:46.09} UT,   289.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     592461669
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0313.fits
SUN_POSTN:       196.22d {+13h 04m 53s}   -6.90d {-06d 54' 10"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.94d {+23h 23m 45s}   -8.82d {-08d 49' 11"}
MOON_DIST:        54.14 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:49:39 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     928924,   Seg_Num: 0
GRB_RA:           44.7282d {+02h 58m 54.76s} (J2000),
                  44.9406d {+02h 59m 45.75s} (current),
                  44.1911d {+02h 56m 45.86s} (1950)
GRB_DEC:         -27.8459d {-27d 50' 45.2"} (J2000),
                 -27.7678d {-27d 46' 04.1"} (current),
                 -28.0446d {-28d 02' 40.5"} (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:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  16640.00 SOD {04:37:20.00} UT,   83.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       196.22d {+13h 04m 52s}   -6.90d {-06d 54' 09"}
SUN_DIST:        135.59 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.93d {+23h 23m 44s}   -8.82d {-08d 49' 17"}
MOON_DIST:        54.18 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.86,-61.80 [deg] galactic lon,lat of the burst
ECL_COORDS:       31.51,-42.54 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:56:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
POINT_ROLL:      137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  17424.60 SOD {04:50:24.60} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.568
N_STARS:         82
X_OFFSET:        365 [pixels]
Y_OFFSET:        162 [pixels]
X_MAX:           1804 [pixels]
Y_MAX:           1601 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00928924000msufc0868.fits
SUN_POSTN:       196.22d {+13h 04m 53s}   -6.90d {-06d 54' 16"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.99d {+23h 23m 57s}   -8.80d {-08d 48' 03"}
MOON_DIST:        54.11 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:56:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
POINT_ROLL:      137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  17424.60 SOD {04:50:24.60} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.568
N_STARS:         82
X_OFFSET:        365 [pixels]
Y_OFFSET:        162 [pixels]
X_MAX:           1804 [pixels]
Y_MAX:           1601 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00928924000msufc0868.fits
SUN_POSTN:       196.22d {+13h 04m 54s}   -6.90d {-06d 54' 16"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      350.99d {+23h 23m 58s}   -8.80d {-08d 48' 00"}
MOON_DIST:        54.11 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:58:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
ROLL:            137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  17424.60 SOD {04:50:24.60} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     592462248
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0892.fits
SUN_POSTN:       196.22d {+13h 04m 54s}   -6.91d {-06d 54' 18"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      351.00d {+23h 24m 01s}   -8.79d {-08d 47' 41"}
MOON_DIST:        54.10 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 11 Oct 19 04:58:59 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     928924,   Seg_Num: 0
POINT_RA:         44.696d {+02h 58m 47s} (J2000)
POINT_DEC:       -27.832d {-27d 49' 56"} (J2000)
ROLL:            137.343d
IMG_START_DATE:  18767 TJD;   284 DOY;   19/10/11
IMG_START_TIME:  17424.60 SOD {04:50:24.60} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     592462248
X_OFFSET:        924 [pixels]
Y_OFFSET:        721 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1084
Y_GRB_POS:       881
BINNING_INDEX:   1
IM_URL:          sw00928924000msuni0892.fits
SUN_POSTN:       196.22d {+13h 04m 54s}   -6.91d {-06d 54' 18"}
SUN_DIST:        135.62 [deg]   Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN:      351.01d {+23h 24m 01s}   -8.79d {-08d 47' 37"}
MOON_DIST:        54.09 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      221.82,-61.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       31.48,-42.51 [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 #25989
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, A.V. Krylov, I. Gorbunov, D. Vlasenko, F. Balakin Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA)
Hugo Levato Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk
K. Ivanov, O. Gres, N.M. Budnev, S.Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University
D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the GRB191011.19 14 sec after notice time and 34 sec after trigger time at 2019-10-11 04:36:30 UT. On our 3-th (30s exposure) set , obtained 148 sec after tigger time at 2019-10-11 04:38:25 UT, we found 1 optical transient within Swift error-box (ra=44.7208 dec=-27.845 r=0.05) brighter than 15.7.
```
 T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
     163   2019-10-11 04:38:25      30   (02h 58m 48.339s , -27d 51m 48.55s)    16.26
```
The OT has irregular early time behaviour since 410.7 till 643.2 seconds after the trigger. The 5-sigma upper limit has been about 15.7mag The message may be cited.

GCN Circular #25990
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 (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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the Swift GRB191011.19 (trigger No 928924,02h 58m 53.640s , -27d 50m 41.28s, R=0.05) errorbox 67 sec after trigger time at 2019-10-11 04:37:04 UT, with upper limit up to 20.0 mag. The observations began at zenit distance = 62 deg. The sun altitude is -32.4 deg.
MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB191011.19 errorbox 85 sec after trigger time at 2019-10-11 04:37:21 UT, with upper limit up to 18.3 mag. The observations began at zenit distance = 21 deg. The sun altitude is -52.0 deg.
The galactic latitude b = -60 deg., longitude l = 98 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1163457
We obtain a following upper limits.

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      73 |          MASTER-IAC |  P| |    10 | 16.9 |        
      98 |          MASTER-IAC |  P| |    60 | 18.1 |  Coadd 
     438 |          MASTER-IAC |  P| |   740 | 20.0 |  Coadd 
      73 |          MASTER-IAC |  P- |    10 | 16.5 |        
      98 |          MASTER-IAC |  P- |    60 | 17.7 |  Coadd 
     438 |          MASTER-IAC |  P- |   740 | 19.6 |  Coadd 
      95 |         MASTER-OAFA |   C |    20 | 16.3 |        
     130 |         MASTER-OAFA |   C |    90 | 17.2 |  Coadd 
     410 |         MASTER-OAFA |   C |   650 | 18.3 |  Coadd 
     125 |          MASTER-IAC |  P| |    20 | 17.6 |        
     125 |          MASTER-IAC |  P- |    20 | 17.0 |        
     164 |         MASTER-OAFA |   C |    30 | 16.2 |        
     174 |          MASTER-IAC |  P- |    30 | 17.2 |        
     174 |          MASTER-IAC |  P| |    30 | 17.8 |        
     232 |          MASTER-IAC |  P- |    40 | 17.5 |        
     297 |          MASTER-IAC |  P- |   170 | 18.5 |  Coadd 
     232 |          MASTER-IAC |  P| |    40 | 18.0 |        
     297 |          MASTER-IAC |  P| |   170 | 18.9 |  Coadd 
     243 |         MASTER-OAFA |   C |    40 | 16.6 |        
     311 |          MASTER-IAC |  P- |    60 | 17.8 |        
     311 |          MASTER-IAC |  P| |    60 | 18.2 |        
     338 |         MASTER-OAFA |   C |    60 | 16.8 |        
     433 |         MASTER-OAFA |   C |   250 | 17.6 |  Coadd 
     400 |          MASTER-IAC |  P| |    70 | 18.4 |        
     400 |          MASTER-IAC |  P- |    70 | 17.8 |        
     451 |         MASTER-OAFA |   C |    80 | 16.5 |        
     499 |          MASTER-IAC |  P| |    90 | 18.6 |        
     624 |          MASTER-IAC |  P| |   340 | 19.5 |  Coadd 
     499 |          MASTER-IAC |  P- |    90 | 18.3 |        
     624 |          MASTER-IAC |  P- |   340 | 19.3 |  Coadd 
     588 |         MASTER-OAFA |   C |   110 | 17.2 |        
     621 |          MASTER-IAC |  P| |   110 | 18.5 |        
     621 |          MASTER-IAC |  P- |   110 | 18.4 |        
     756 |         MASTER-OAFA |   C |   140 | 17.4 |        
     931 |         MASTER-OAFA |   C |   490 | 18.1 |  Coadd 
     766 |          MASTER-IAC |  P| |   140 | 18.7 |        
     766 |          MASTER-IAC |  P- |   140 | 18.5 |        
     940 |          MASTER-IAC |  P| |   170 | 18.9 |        
    1120 |          MASTER-IAC |  P| |   530 | 19.1 |  Coadd 
     940 |          MASTER-IAC |  P- |   170 | 18.6 |        
    1120 |          MASTER-IAC |  P- |   530 | 18.9 |  Coadd 
     956 |         MASTER-OAFA |   C |   170 | 17.5 |        
    1134 |          MASTER-IAC |  P| |   180 | 19.0 |        
    1134 |          MASTER-IAC |  P- |   180 | 18.6 |        
    1175 |         MASTER-OAFA |   C |   180 | 17.4 |        
    1382 |          MASTER-IAC |  P- |   180 | 18.6 |        
    1383 |          MASTER-IAC |  P| |   180 | 19.0 |        
    1399 |         MASTER-OAFA |   C |   180 | 17.0 |        
    1579 |         MASTER-OAFA |   C |   540 | 17.3 |  Coadd 
    1625 |         MASTER-OAFA |   C |   180 | 16.5 |        
    1628 |          MASTER-IAC |  P| |   180 | 19.0 |        
    1628 |          MASTER-IAC |  P- |   180 | 18.7 |        
    1848 |         MASTER-OAFA |   C |   180 | 16.8 |        
    1873 |          MASTER-IAC |  P| |   180 | 19.0 |        
    1873 |          MASTER-IAC |  P- |   180 | 18.7 |        
    2068 |         MASTER-OAFA |   C |   180 | 16.9 |        
    2121 |          MASTER-IAC |  P| |   180 | 19.0 |        
    2121 |          MASTER-IAC |  P- |   180 | 18.8 |        
    2293 |         MASTER-OAFA |   C |   180 | 15.0 |        
    2372 |          MASTER-IAC |  P- |   180 | 18.7 |        
    2372 |          MASTER-IAC |  P| |   180 | 19.1 |        
    2516 |         MASTER-OAFA |   C |   180 | 12.8 |        
    2620 |          MASTER-IAC |  P- |   180 | 18.8 |        
    2620 |          MASTER-IAC |  P| |   180 | 19.0 |

Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

GCN Circular #25991
D. B. Malesani (DTU Space), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D. A. Kann (HETH/IAA-CSIC), V. D'Elia (SSDC), J. P. U. Fynbo (DAWN/NBI), and G. Pugliese (Univ. Amsterdam) report on behalf of the Stargate Consortium:
We observed the localization of the Swift GRB 191011A (Laha et al., GCN 25988) with X-shooter on the VLT in RRM mode. The optical afterglow (Laha et al., GCN 25988, Lipunov et al., GCN 25989) is well-detected, and we measure a magnitude of r' = 19.18 +/- 0.06 mag (AB) from the 15 s acquisition image obtained starting at 2019-10-11T04:59:12.540, 23.28 min after the trigger, measured against PanSTARRS field stars.
In the first spectrum (integration time 175 s) we detect Ly-a, SII, OI, SiII, CII, SiIV, CIV, FeII, CI, AlII, AlIII, MnII, MgII, MgI, and FeII*, all at a common redshift z=1.722. We consider this the redshift of GRB 191011A. We furthermore report the presence of an intervening MgII system at z=1.2072.
We acknowledge excellent support from the ESO observing staff in Paranal, in particular Chiara Mazzucchelli, Rodrigo Palominos, and Camila Navarrete.
NB: We note the detection of a Fermi GRB (The Fermi GBM team, GCN 25987) at essentially the same time and with similar light curve structure, however, this GRB is localized to the northern hemisphere.
GCN Circular #25992
A. Nicuesa Guelbenzu (TLS Tautenburg) and P. Schady (Univ. of Bath) report:
We observed the field of GRB 191011A (Swift trigger 928924; Laha et al., GCN 25988) simultaneously in g'r'i'z'JHKs with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).
Observations started at 04:38 UT on 2019-10-11, around 2 minutes after the GRB trigger and lasted for about 5 minutes. They were performed at an average seeing of 1.14" and at an average airmass of 1.1.
We detect the optical afterglow candidate reported by Laha et al. (GCN 25988) and measure the following preliminary magnitudes and upper limits (AB magnitudes):
```
r' = 19.52 +/- 0.1 mag,
i' = 18.46 +/- 0.05 mag,
z' = 18.62 +/- 0.1 mag,
J  = 17.89 +/- 0.1 mag,
H  = 17.21 +/- 0.1 mag.
```
The optical afterglow is also visible in g' band.
The magnitudes are calibrated against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.02 mag in the direction of the burst (Schlegel et al. 1998).
We acknowledge the excellent support from Regis Lachaume in La Silla in acquiring these observations.
GCN Circular #25993
J. Burgess, F. Kunzweiler, B. Biltzinger, F. Berlato, & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 592461363 at 04:35:58 on 11 Oct. 2019 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 46.4+/-4.6 deg Decl.(2000.0) = -32.5+/-5.6 deg We estimate an additional systematic error of 2 deg.
Further details are available at: https://grb.mpe.mpg.de/grb/GRB191011192/
The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB191011192/healpix
The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB191011192/json
GCN Circular #25994
A. Nicuesa Guelbenzu (TLS Tautenburg) reports:
An error occurred in the previous data reduction. Corrected AB magnitudes are (midtime of the observations: 04:42 UT, Oct. 11):
```
g' = 19.97 +/- 0.08 mag,
r' = 19.46 +/- 0.05 mag,
i' = 19.08 +/- 0.07 mag,
z' = 18.79 +/- 0.10 mag,
J  = 18.79 +/- 0.06 mag, and
H  = 18.61 +/- 0.06 mag,
```
calibrated against PanSTARRS and 2MASS field stars.
GCN Circular #25995
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 4075 s of XRT Photon Counting mode data and 7 UVOT images for GRB 191011A, 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 = 44.72800, -27.84540 which is equivalent to:
```
RA (J2000): 02h 58m 54.72s
Dec (J2000): -27d 50' 43.4"
```
with an uncertainty of 1.5 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 #25996
V. Lipunov Sternberg Astronomical Institute, Moscow State University
The GRB 191011A optical transient candidate published by us in (Lipunov et. al. GCN 25989) is a group of hot pixels on a CCD matrix. This is not a real GRB afterglow candidate. We sorry for this mistake.
GCN Circular #25998
J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (ASDC), V. D'Elia (ASDC), J.A. Kennea (PSU), B. Sbarufatti (PSU), D.N. Burrows (PSU) and S.L Laha report on behalf of the Swift-XRT team:
We have analysed 7.1 ks of XRT data for GRB 191011A (L Laha et al. GCN Circ. 25988), from 84 s to 23.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 25995).
The light curve can be modelled with an initial power-law decay with an index of alpha=0.15 (+0.15, -0.20), followed by a break at T+855 s to an alpha of 1.34 (+/-0.12).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.83 (+/-0.15). The best-fitting absorption column is 5.3 (+3.5, -3.1) x 10^21 cm^-2, at a redshift of 1.722, in addition to the Galactic value of 1.5 x 10^20 cm^-2 (Willingale et al. 2013). 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:
```
Galactic foreground: 1.5 x 10^20 cm^-2
Intrinsic column:    5.3 (+3.5, -3.1) x 10^21 cm^-2 at z=1.722
Photon index:	     1.83 (+/-0.15)
```
If the light curve continues to decay with a power-law decay index of 1.34, the count rate at T+24 hours will be 1.0 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.7 x 10^-14 (4.2 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00928924.
This circular is an official product of the Swift-XRT team.
GCN Circular #25999
R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration:
We observed Fermi GRB 191011A (Fermi GBM Team at MSFC/Fermi-GBM, GCN 25987) with the LCO 1-m Sinistro instrument at the Cerro Tololo site on October 11, from 04:54 to 05:18 UT (corresponding to 0.13 to 0.4 hours from the GRB trigger time) with the Bessel I filter.
We performed a series of 5x120s exposures. While we do not detect a source in individual frames, we do detect a source in co-added frames that is not present in either USNO-B1.0 or 2MASS surveys that is consistent with the optical afterglow location (Palmer et al., GCN 25988) with the following magnitude:
I = 18.81 +/- 0.13
This flux is calibrated against several USNO-B1.0 objects near the GRB location but is not corrected for Galactic Extinction.
These observations were possible thanks to the USVI NASA-EPSCoR Research Infrastructure Development (RID) grant NNX16AL44A.
GCN Circular #26000
E. Bissaldi (Politecnico and INFN Bari) and P. Veres (UAH) report on behalf of the Fermi GBM Team:
"At 04:35:58.58 UT on 11 October 2019, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 191011A (trigger 592461363 / 191011192), which was also detected by the Swift/BAT (Laha et al. 2019, GCN 25988).
The GBM localization statistic exhibited two minima, one of which is consistent with the Swift location (75% containment). The localization centroid in the Real-time Localization notice (GCN 25987) is for the other minimum, which is near the Earth limb and is inconsistent with the Swift location.
The angle from the Fermi LAT boresight at the GBM trigger time is 39 degrees.
The GBM light curve shows several pulses with a duration (T90) of about 13 s (50-300 keV). The time-averaged spectrum from T0-2.0 s to T0-0.38 s is adequately fit by a simple power law function with index -1.76 +/- 0.08.
The event fluence (10-1000 keV) in this time interval is (4.33 +/- 0.50)E-7 erg/cm^2. The 1-sec peak photon flux measured starting from T0-1.8 s in the 10-1000 keV band is 3.29 +/- 0.30 ph/s/cm^2.
A power law function with an exponential high-energy cutoff fits the spectrum equally well. The power law index is -1.24 +/- 0.29 and the cutoff energy, parameterized as Epeak, is 89 +/- 23 keV.
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 #26001
Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Diego Gonz�lez (UNAM), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jes�s Gonz�lez (UNAM), Carlos Rom�n-Z��iga (UNAM), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.), and Vicki Toy (UMD) report:
We observed the field of GRB 191011A (Laha et al., GCN Circ. 25988) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on Sierra San Pedro M�rtir from 2019/10 11.26 to 2019/10 11.48 UTC (1.60 to 6.94 hours after the BAT trigger), obtaining a total of 1.64 hours exposure in the i band and 0.49 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle, in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections and upper limits (3-sigma):
```
  i	= 21.59 +/- 0.13
  Z	= 21.22 +/- 0.21
  Y	> 21.76
  J	> 19.81
  H	> 20.54
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron�mico Nacional in San Pedro M�rtir.
GCN Circular #26002
N. P. M. Kuin (UCL-MSSL) and Laha (GSFC/UMBC/CRESST) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191011A 78 s after the BAT trigger (Laha et al., GCN Circ. 25988). A source consistent with the XRT position (Evans et al. GCN Circ. 25995) is detected in the initial UVOT exposures. This GRB was also detected by Fermi/GBM (GCN Circ. 25987,26000) and Insight-HXMT-HE(Yi et al, GCN Cir. 25997). A redshift was reported using the VLT/Xshooter (Kahn et al, GCN Circ.25991), while the optical afterglow was reported from Master (Lipunov et al, GCN Circ. 25990; GROND (Nicuesa Guelbenzu et al., GCN Circ. 25992).
The preliminary UVOT position is:
```
    RA  (J2000) =  02:58:54.79 =  44.72829 (deg.)
    Dec (J2000) = -27:50:43.4  = -27.84540 (deg.)
```
with an estimated uncertainty of 0.73 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               78          228          147         20.27 +/- 0.16
v                  620        11672         1211        >20.2
b                  545         7080          510         21.03 +/- 0.27
u                  290         6875          697         20.86 +/- 0.27
w1                 670         6670          510        >20.3
m2                1073        12198          767        >21.1
w2                1024         7491          432        >20.9
```
The afterglow is seen to be nearly constant in the white filter until about 1000s, whereafter a decay is observed. 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 #26003
T. N. Ukwatta (LANL), 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), J. P. Norris (BSU), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191011A (trigger #928924) (Laha et al., GCN Circ. 25988). The BAT ground-calculated position is RA, Dec = 44.729, -27.853 deg which is
```
   RA(J2000)  =  02h 58m 55.0s
   Dec(J2000) = -27d 51' 12.4"
```
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%.
The mask-weighted light curve shows a short pulse that starts and peaks at ~T0, and ends at ~T+2 s. The short pulse is followed by some weak emission that lasts until ~T+8 s. T90 (15-350 keV) is 7.37 +- 0.95 sec (estimated error including systematics).
The time-averaged spectrum from T-0.21 to T+8.04 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.94 +- 0.17. The fluence in the 15-150 keV band is 3.3 +- 0.4 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.18 sec in the 15-150 keV band is 1.8 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
Using the 16-ms binned light curve, the spectral lag of the short pulse is 30 (+45, -34) ms for the 50-100 keV to 15-25 keV bands, and 20 (+40, -44) ms for the 25-50 keV to 15-25 keV bands. These values are consistent with both short and long GRBs due to the large uncertainties.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/928924/BA/

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Jochen Greiner, last update: 19-Oct-2019 [Disclaimer]