Gamma-ray Burst 190109B

(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:     Wed 09 Jan 19 11:56:32 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     882809,   Seg_Num: 0
GRB_RA:           55.595d {+03h 42m 23s} (J2000),
                  56.016d {+03h 44m 04s} (current),
                  54.497d {+03h 37m 59s} (1950)
GRB_DEC:         +63.578d {+63d 34' 40"} (J2000),
                 +63.637d {+63d 38' 14"} (current),
                 +63.418d {+63d 25' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3294 [cnts]    Image_Peak=183 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       19486 [cnts]
BKG_TIME:        42953.77 SOD {11:55:53.77} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18492 TJD;     9 DOY;   19/01/09
GRB_TIME:        42969.20 SOD {11:56:09.20} UT
GRB_PHI:          31.31 [deg]
GRB_THETA:        28.79 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.03 [sigma]
IMAGE_SIGNIF:    8.64 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -1  +0  +1 +57  +0 
SUN_POSTN:       290.49d {+19h 21m 57s}  -22.10d {-22d 06' 01"}
SUN_DIST:        125.18 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.36d {+21h 57m 26s}  -15.30d {-15d 17' 44"}
MOON_DIST:       102.20 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       70.06, 42.50 [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 = 179.02,3.07 [deg].
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=568727775).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Jan 19 11:56:36 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     568727775
GRB_RA:           78.167d {+05h 12m 40s} (J2000),
                  78.587d {+05h 14m 21s} (current),
                  77.063d {+05h 08m 15s} (1950)
GRB_DEC:         +59.600d {+59d 36' 00"} (J2000),
                 +59.621d {+59d 37' 17"} (current),
                 +59.540d {+59d 32' 25"} (1950)
GRB_ERROR:       27.48 [deg radius, statistical plus systematic]
GRB_INTEN:       53 [cnts/sec]
DATA_SIGNIF:     5.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18492 TJD;     9 DOY;   19/01/09
GRB_TIME:        42970.76 SOD {11:56:10.76} UT
GRB_PHI:         211.00 [deg]
GRB_THETA:        55.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      2.02
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      57%  GRB
2nd_MOST_LIKELY:  24%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,0,1, 0,0,
SUN_POSTN:       290.49d {+19h 21m 57s}  -22.10d {-22d 06' 01"}
SUN_DIST:        136.25 [deg]   Sun_angle= -9.9 [hr] (East of Sun)
MOON_POSTN:      329.36d {+21h 57m 27s}  -15.30d {-15d 17' 44"}
MOON_DIST:       112.84 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      150.95, 11.84 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       82.59, 36.46 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190109497/quicklook/glg_lc_medres34_bn190109497.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 96.30,-20.35 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=882809).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Jan 19 11:56:48 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     568727775
GRB_RA:           76.460d {+05h 05m 50s} (J2000),
                  76.868d {+05h 07m 28s} (current),
                  75.389d {+05h 01m 33s} (1950)
GRB_DEC:         +57.920d {+57d 55' 12"} (J2000),
                 +57.944d {+57d 56' 40"} (current),
                 +57.852d {+57d 51' 08"} (1950)
GRB_ERROR:       11.38 [deg radius, statistical only]
DATA_SIGNIF:     5.70 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        18492 TJD;     9 DOY;   19/01/09
GRB_TIME:        42970.76 SOD {11:56:10.76} UT
GRB_PHI:         209.00 [deg]
GRB_THETA:        54.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       290.49d {+19h 21m 57s}  -22.10d {-22d 06' 01"}
SUN_DIST:        136.75 [deg]   Sun_angle= -9.8 [hr] (East of Sun)
MOON_POSTN:      329.36d {+21h 57m 27s}  -15.30d {-15d 17' 42"}
MOON_DIST:       112.18 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      151.83, 10.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       81.28, 34.89 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190109497/quicklook/glg_lc_medres34_bn190109497.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_568727775.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(1.0<100sec) coincident with the SWIFT_BAT event (trignum=882809).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 11:57:43 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.577d {+03h 42m 18s} (J2000)
POINT_DEC:       +63.579d {+63d 34' 45"} (J2000)
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43056.30 SOD {11:57:36.30} UT,   87.1 [sec] since BAT Trigger Time
COUNTS:          7    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    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:     Wed 09 Jan 19 12:00:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.576d {+03h 42m 18s} (J2000)
POINT_DEC:       +63.579d {+63d 34' 45"} (J2000)
POINT_ROLL:      292.207d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43059.88 SOD {11:57:39.88} UT,   90.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.362
N_STARS:         190
X_OFFSET:        433 [pixels]
Y_OFFSET:        616 [pixels]
X_MAX:           1392 [pixels]
Y_MAX:           1575 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00882809000msufc0090.fits
SUN_POSTN:       290.49d {+19h 21m 57s}  -22.10d {-22d 06' 00"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.39d {+21h 57m 34s}  -15.29d {-15d 17' 12"}
MOON_DIST:       102.17 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 12:00:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.576d {+03h 42m 18s} (J2000)
POINT_DEC:       +63.579d {+63d 34' 45"} (J2000)
POINT_ROLL:      292.207d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43059.88 SOD {11:57:39.88} UT,   90.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.362
N_STARS:         190
X_OFFSET:        433 [pixels]
Y_OFFSET:        616 [pixels]
X_MAX:           1392 [pixels]
Y_MAX:           1575 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00882809000msufc0090.fits
SUN_POSTN:       290.49d {+19h 21m 58s}  -22.10d {-22d 06' 00"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.40d {+21h 57m 35s}  -15.29d {-15d 17' 10"}
MOON_DIST:       102.17 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:02:01 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.576d {+03h 42m 18s} (J2000)
POINT_DEC:       +63.579d {+63d 34' 45"} (J2000)
ROLL:            292.207d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43059.88 SOD {11:57:39.88} UT,   90.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     568727882
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0113.fits
SUN_POSTN:       290.49d {+19h 21m 58s}  -22.10d {-22d 06' 00"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.40d {+21h 57m 37s}  -15.28d {-15d 17' 01"}
MOON_DIST:       102.16 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:02:09 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     882809,   Seg_Num: 0
GRB_RA:           55.595d {+03h 42m 23s} (J2000),
                  56.016d {+03h 44m 04s} (current),
                  54.497d {+03h 37m 59s} (1950)
GRB_DEC:         +63.578d {+63d 34' 40"} (J2000),
                 +63.637d {+63d 38' 14"} (current),
                 +63.418d {+63d 25' 06"} (1950)
GRB_DATE:        18492 TJD;     9 DOY;   19/01/09
GRB_TIME:        42969.20 SOD {11:56:09.20} UT
TRIGGER_INDEX:   137
GRB_PHI:          31.31 [deg]
GRB_THETA:        28.79 [deg]
DELTA_TIME:      58.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.03 [sigma]
IMAGE_SIGNIF:    8.64 [sigma]
LC_URL:          sw00882809000msb.lc
SUN_POSTN:       290.49d {+19h 21m 58s}  -22.10d {-22d 06' 00"}
SUN_DIST:        125.18 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.41d {+21h 57m 37s}  -15.28d {-15d 17' 00"}
MOON_DIST:       102.17 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       70.06, 42.50 [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 = 179.02,3.07 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 12:02:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.576d {+03h 42m 18s} (J2000)
POINT_DEC:       +63.579d {+63d 34' 45"} (J2000)
ROLL:            292.207d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43059.88 SOD {11:57:39.88} UT,   90.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     568727882
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0113.fits
SUN_POSTN:       290.49d {+19h 21m 58s}  -22.10d {-22d 06' 00"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.41d {+21h 57m 38s}  -15.28d {-15d 17' 00"}
MOON_DIST:       102.16 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:07:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
POINT_ROLL:      292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43272.09 SOD {12:01:12.09} UT,   302.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.605
N_STARS:         190
X_OFFSET:        193 [pixels]
Y_OFFSET:        376 [pixels]
X_MAX:           1632 [pixels]
Y_MAX:           1815 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00882809000msufc0302.fits
SUN_POSTN:       290.49d {+19h 21m 59s}  -22.10d {-22d 05' 57"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.45d {+21h 57m 47s}  -15.27d {-15d 16' 20"}
MOON_DIST:       102.13 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 12:07:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
POINT_ROLL:      292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43272.09 SOD {12:01:12.09} UT,   302.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.605
N_STARS:         190
X_OFFSET:        193 [pixels]
Y_OFFSET:        376 [pixels]
X_MAX:           1632 [pixels]
Y_MAX:           1815 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00882809000msufc0302.fits
SUN_POSTN:       290.49d {+19h 21m 59s}  -22.10d {-22d 05' 57"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.45d {+21h 57m 48s}  -15.27d {-15d 16' 17"}
MOON_DIST:       102.13 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:08:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
ROLL:            292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43272.09 SOD {12:01:12.09} UT,   302.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     568728094
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0325.fits
SUN_POSTN:       290.50d {+19h 21m 59s}  -22.10d {-22d 05' 57"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.46d {+21h 57m 50s}  -15.27d {-15d 16' 09"}
MOON_DIST:       102.13 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:08:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
ROLL:            292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43272.09 SOD {12:01:12.09} UT,   302.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     568728094
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0325.fits
SUN_POSTN:       290.50d {+19h 21m 59s}  -22.10d {-22d 05' 57"}
SUN_DIST:        125.17 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.46d {+21h 57m 51s}  -15.27d {-15d 16' 07"}
MOON_DIST:       102.12 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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 #23648
B. Sbarufatti (PSU), S. D. Barthelmy (GSFC), J.D. Gropp (PSU), J. A. Kennea (PSU) and K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team:
At 11:56:09 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190109B (trigger=882809). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 55.595, +63.578, which is
```
   RA(J2000)  =  03h 42m 23s
   Dec(J2000) = +63d 34' 40"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 10 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 11:57:36.3 UT, 87.1 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 90 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 25% of the BAT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.70.
Even without an XRT detection, we believe this event to be a real GRB given an 8.6 sigma detection in BAT and that there is a temporal coincidence with a Fermi-GBM event. However there still is a possibility that this is not real. We will have to wait for the full data set to be downlinked.
Burst Advocate for this burst is B. Sbarufatti (bxs60 AT psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 12:23:26 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
POINT_ROLL:      292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43827.34 SOD {12:10:27.34} UT,   858.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.296
N_STARS:         190
X_OFFSET:        193 [pixels]
Y_OFFSET:        376 [pixels]
X_MAX:           1632 [pixels]
Y_MAX:           1815 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00882809000msufc0858.fits
SUN_POSTN:       290.51d {+19h 22m 02s}  -22.10d {-22d 05' 52"}
SUN_DIST:        125.16 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.58d {+21h 58m 19s}  -15.24d {-15d 14' 12"}
MOON_DIST:       102.04 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Jan 19 12:23:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
POINT_ROLL:      292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43827.34 SOD {12:10:27.34} UT,   858.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.296
N_STARS:         190
X_OFFSET:        193 [pixels]
Y_OFFSET:        376 [pixels]
X_MAX:           1632 [pixels]
Y_MAX:           1815 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00882809000msufc0858.fits
SUN_POSTN:       290.51d {+19h 22m 02s}  -22.10d {-22d 05' 51"}
SUN_DIST:        125.16 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.58d {+21h 58m 20s}  -15.24d {-15d 14' 10"}
MOON_DIST:       102.04 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:24:55 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
ROLL:            292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43827.34 SOD {12:10:27.34} UT,   858.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     568728649
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0881.fits
SUN_POSTN:       290.51d {+19h 22m 02s}  -22.10d {-22d 05' 51"}
SUN_DIST:        125.16 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.59d {+21h 58m 22s}  -15.23d {-15d 14' 01"}
MOON_DIST:       102.04 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 12:25:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     882809,   Seg_Num: 0
POINT_RA:         55.572d {+03h 42m 17s} (J2000)
POINT_DEC:       +63.577d {+63d 34' 38"} (J2000)
ROLL:            292.202d
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43827.34 SOD {12:10:27.34} UT,   858.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     568728649
X_OFFSET:        752 [pixels]
Y_OFFSET:        935 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       912
Y_GRB_POS:       1095
BINNING_INDEX:   1
IM_URL:          sw00882809000msuni0881.fits
SUN_POSTN:       290.51d {+19h 22m 02s}  -22.10d {-22d 05' 51"}
SUN_DIST:        125.16 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.59d {+21h 58m 23s}  -15.23d {-15d 14' 00"}
MOON_DIST:       102.04 [deg]
MOON_ILLUM:      10 [%]
GAL_COORDS:      140.63,  6.74 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.05, 42.50 [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:     Wed 09 Jan 19 13:08:45 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     882809,   Seg_Num: 0
GRB_RA:           55.4870d {+03h 41m 56.88s} (J2000),
                  55.9071d {+03h 43m 37.71s} (current),
                  54.3892d {+03h 37m 33.40s} (1950)
GRB_DEC:         +63.5919d {+63d 35' 30.8"} (J2000),
                 +63.6516d {+63d 39' 05.7"} (current),
                 +63.4320d {+63d 25' 55.0"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18492 TJD;     9 DOY;   19/01/09
IMG_START_TIME:  43083.00 SOD {11:58:03.00} UT,   113.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       290.54d {+19h 22m 10s}  -22.09d {-22d 05' 35"}
SUN_DIST:        125.10 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      329.95d {+21h 59m 48s}  -15.14d {-15d 08' 13"}
MOON_DIST:       101.76 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      140.59,  6.73 [deg] galactic lon,lat of the burst
ECL_COORDS:       70.00, 42.53 [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:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 1.1% < P(seren) < 2.8%.

GCN Circular #23651
D.N. Burrows (PSU), J.A. Kennea (PSU), S. Campana (INAF-OAB), G. Cusumano (INAF-IASF PA), P.A. Evans (U. Leicester) and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 190109B at 11:57:36.3 UT, 87.1 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 55.4870, 63.5920 which is equivalent to:
```
   RA(J2000)  = 03h 41m 56.88s
   Dec(J2000) = +63d 35' 31.2"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 180 arcseconds from the BAT onboard position, outside 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 4.56 x 10^21 cm^-2 (Willingale et al. 2013).
GCN Circular #23652
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 649 s of XRT Photon Counting mode data and 1 UVOT images for GRB 190109B, 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 = 55.48723, +63.59203 which is equivalent to:
```
RA (J2000): 03h 41m 56.94s
Dec (J2000): +63d 35' 31.3"
```
with an uncertainty of 1.8 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 #23654
S. Belkin (IKI), E. Klunko (ISTP), A. Pozanenko (IKI), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-FuN: We observed the field of the GRB 190109A (Sbarufatti et al., GCN 23648) with AZT-33IK telescope of Sayan observatory (Mondy). We obtained several images in R-filter starting on Jan. 09 (UT) 12:17:03, i.e. 21 minutes after the burst trigger. We do not detect any object within enhanced Swift-XRT position (Beardmore et al., GCN 23652). Preliminary photometry of the field is following.
```
Date        UT start  t-T0      Filter Exp.   OT      Err.  UL(3sigma) 
                       (mid, days)      (s)
  
2019-01-09  12:17:03  0.02463    R     1900   n/d     n/d   22.6
```
The photometry is based on several nearby USNO-B1.0 stars.
GCN Circular #23655
X.-Y.Li, Y.-D. Hu, I. Carrasco, E. Fernandez-Garcia and A. J. Castro-Tirado (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), S. Jeong and I. H. Park (SKKU) and M. D. Caballero-Garcia (ASU-CAS, CZ) on behalf of a larger collaboration, report:
The 60cm BOOTES-5/JGT robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) followed-up GRB 190109B (Sbarufatti et al., GCNC 23648) starting at 13:30 UT (~1.6 hr after trigger). Within the enhanced Swift/XRT position (Beardmore et al., GCNC 23652), no optical afterglow is found down to 20.4 mag in the r-band on the co-added image, in agreement with the UVOT upper limit (Sbarufatti et al., GCNC 23648).
We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for its excellent support.
GCN Circular #23656
Eleonora Troja (GSFC), Alan M. Watson (UNAM), Nat Butler (ASU), Rosa L. Becerra (UNAM), William H. Lee (UNAM), Margarita Pereyra (UNAM), Carlos Rom�n-Z��iga (UNAM), and Alexander Kutyrev (GSFC) report:
We observed the field of GRB 190109B (Sbarufatti et al., GCN Circ. 23642) with the COATLI 50-cm telescope and interim imager at the Observatorio Astron�mico Nacional on the Sierra de San Pedro M�rtir (http://coatli.astroscu.unam.mx) from 2019-01-09 11:57:47.6 to 13:27:45.2 (from 98.5 seconds to 1.53 hours after the trigger) at air masses above 3, obtaining a total of 59.1 minutes of exposure in the w filter.
We do not detect an optical source within the enhanced XRT position region (Beardmore et al., GCN Circ. 23652) to a 5-sigma limiting magnitude of w = 20.3.
Our w magnitudes are calibrated against the USNO-B1 catalog (adjusted to an approximate AB system) and are not corrected for Galactic extinction in the direction of the GRB.
We thank the COATLI technical team and the staff of the Observatorio Astron�mico Nacional.
GCN Circular #23657
A. Pozanenko (IKI) report on behalf of IKI-FuN:
The title and text of the GCN circ. 23654 refers to the GRB 190109B, not GRB 190109A.
We apologize for possible inconvenience.
GCN Circular #23659
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), B. Sbarufatti (PSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we report further analysis of BAT GRB 190109B (trigger #882809) (Sbarufatti, et al., GCN Circ. 23648). The BAT ground-calculated position is RA, Dec = 55.563, 63.592 deg, which is
```
   RA(J2000)  =  03h 42m 15.1s 
   Dec(J2000) = +63d 35' 31.7" 
```
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 60%.
The mask-weighted light curve shows a couple overlapping peaks starting at ~T-4sec, peaking at ~T+1 sec, and a shallow tail out to ~T+40 sec. T90 (15-350 keV) is 5.92 +- 0.78 sec (estimated error including systematics).
The time-averaged spectrum from T-4.24 to T+3.31 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.58 +- 0.16. The fluence in the 15-150 keV band is 4.8 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.12 sec in the 15-150 keV band is 1.7 +- 0.2 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/882809/BA/
GCN Circular #23662
P.A. Evans (U. Leicester), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), S. J. LaPorte (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and B. Sbarufatti report on behalf of the Swift-XRT team:
We have analysed 6.5 ks of XRT data for GRB 190109B (Sbarufatti et al. GCN Circ. 23648), from 96 s to 18.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 23652).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.97 (+/-0.06).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.04 (+0.27, -0.21). The best-fitting absorption column is 5.1 (+1.6, -0.5) x 10^21 cm^-2, consistent with the Galactic value of 4.6 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 4.0 x 10^-11 (6.7 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.1 (+1.6, -0.5) x 10^21 cm^-2
Galactic foreground: 4.6 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     2.04 (+0.27, -0.21)
```
If the light curve continues to decay with a power-law decay index of 0.97, the count rate at T+24 hours will be 2.2 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.7 x 10^-14 (1.5 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00882809.
This circular is an official product of the Swift-XRT team.
GCN Circular #23664
GRB 190109B: Swift/UVOT Upper Limits
K. K. Simpson (PSU) and B. Sbarufatti (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190109B 91 s after the BAT trigger (Sbarufatti et al., GCN Circ. 23648). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 23652) 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            91          241          147         >20.7
u_FC               303          553          246         >20.7
white               91         6461          727         >22.1
v                  634         6860          441         >20.4
b                  559         6256          432         >20.9
u                  303         6050          470         >21.0
w1                 683         5845          236         >20.2
m2                5440         5640          197         >20.8
w2                5030         6666          393         >20.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.72 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #23666
C. Fletcher (USRA) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 11:56:10.76 UT on 09 January 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190109B (trigger 568727775 / 190109497) which was also detected by the Swift (Sbarufatti et al. 2019, GCN 23648). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 46 degrees.
The GBM light curve consists of a single peak with a duration (T90) of about 8 s (50-300 keV). The time-averaged spectrum from T0-6.1 s to T0+3.1 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.85 +/- 0.25 and the cutoff energy, parameterized as Epeak, is 92 +/- 14 keV.
The event fluence (10-1000 keV) in this time interval is (6.76 +/- 0.67)E-7 erg/cm^2. The 1-sec peak photon flux measured starting from T0-1.6 s in the 10-1000 keV band is 2.8 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #23711
M. Oeda, K. L. Murata, R. Itoh, Y. Tachibana, S. Harita, K. Morita, K.Shiraishi, K. Iida, M. Niwano, R. Adachi, Y. Yatsu, and N. Kawai (TokyoTech) report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 190109B (B. Sbarufatti et al.,GCN Circular #23648) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory,Yamanashi, Japan.
The observation started on 11:57:03.81 UT. We did not find any new point source within the enhanced XRT circle (A.P. Beardmore et al., GCN Circular #23652) in all three bands. We obtained following 5 sigma limits for the magnitudes.
```
T0+[min]    MID-UT      T-EXP[sec]    g'       Rc        Ic
-------------------------------------------------------------------------------------------------------
0.913      11:57:33.81           60        >17.54     >17.26     >16.72
0.913       12:31:59.3          3660      >19.29     >17.67     >17.12
-------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
```
We used UCAC-4 catalog for flux calibration.

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Jochen Greiner, last update: 15-Jan-2019 [Disclaimer]