Gamma-ray Burst 190719C

(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 19 Jul 19 14:59:02 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.210d {+16h 00m 50s} (J2000),
                 240.439d {+16h 01m 45s} (current),
                 239.626d {+15h 58m 30s} (1950)
GRB_DEC:         +12.977d {+12d 58' 39"} (J2000),
                 +12.924d {+12d 55' 25"} (current),
                 +13.117d {+13d 07' 01"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5544 [cnts]    Image_Peak=705 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       18265 [cnts]
BKG_TIME:        53896.73 SOD {14:58:16.73} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18683 TJD;   200 DOY;   19/07/19
GRB_TIME:        53914.39 SOD {14:58:34.39} UT
GRB_PHI:         -34.01 [deg]
GRB_THETA:        12.19 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     62.33 [sigma]
IMAGE_SIGNIF:    18.62 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +6  +0  +0 +39  +0 
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 07"}
SUN_DIST:        113.56 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.25d {+22h 00m 59s}  -15.76d {-15d 45' 44"}
MOON_DIST:        93.30 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.90, 43.63 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      234.81, 32.85 [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 = 19.51,-7.18 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=585241119).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:00:16 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.2049d {+16h 00m 49.1s} (J2000),
                 240.4336d {+16h 01m 44.0s} (current),
                 239.6203d {+15h 58m 28.8s} (1950)
GRB_DEC:         +12.9986d {+12d 59' 54.9"} (J2000),
                 +12.9447d {+12d 56' 40.9"} (current),
                 +13.1382d {+13d 08' 17.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       23 [cnts]
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53975.33 SOD {14:59:35.33} UT,   60.9 [sec] since BAT Trigger Time
CENTROID_X:      266.94,  raw= 267  [pixels]
CENTROID_Y:      264.62,  raw= 265  [pixels]
ROLL:            299.79 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -78.90
GRB_POS_XRT_Z:   -95.35
IMAGE_URL:       sw00915381000msxps_rw.img
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 07"}
SUN_DIST:        113.55 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.26d {+22h 01m 02s}  -15.76d {-15d 45' 33"}
MOON_DIST:        93.32 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.92, 43.64 [deg] galactic lon,lat of the burst
ECL_COORDS:      234.80, 32.87 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:00:13 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.2049d {+16h 00m 49.1s} (J2000),
                 240.4336d {+16h 01m 44.0s} (current),
                 239.6203d {+15h 58m 28.8s} (1950)
GRB_DEC:         +12.9986d {+12d 59' 54.9"} (J2000),
                 +12.9447d {+12d 56' 40.9"} (current),
                 +13.1382d {+13d 08' 17.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       23 [cnts]
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53975.33 SOD {14:59:35.33} UT,   60.9 [sec] since BAT Trigger Time
CENTROID_X:      266.94,  raw= 267  [pixels]
CENTROID_Y:      264.62,  raw= 265  [pixels]
ROLL:            299.79 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -78.90
GRB_POS_XRT_Z:   -95.35
IMAGE_URL:       sw00915381000msxps_rw.img
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 07"}
SUN_DIST:        113.55 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.26d {+22h 01m 02s}  -15.76d {-15d 45' 34"}
MOON_DIST:        93.32 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.92, 43.64 [deg] galactic lon,lat of the burst
ECL_COORDS:      234.80, 32.87 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:02:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.969d {+12d 58' 08"} (J2000)
POINT_ROLL:      299.788d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53985.39 SOD {14:59:45.39} UT,   71.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.323
N_STARS:         36
X_OFFSET:        576 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1535 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00915381000msufc0070.fits
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 06"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.28d {+22h 01m 06s}  -15.75d {-15d 45' 14"}
MOON_DIST:        93.32 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:04:05 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.969d {+12d 58' 08"} (J2000)
ROLL:            299.788d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53985.39 SOD {14:59:45.39} UT,   71.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     585241208
X_OFFSET:        1040 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1200
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00915381000msuni0094.fits
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 05"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.29d {+22h 01m 09s}  -15.75d {-15d 45' 02"}
MOON_DIST:        93.33 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:04:14 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.210d {+16h 00m 50s} (J2000),
                 240.439d {+16h 01m 45s} (current),
                 239.626d {+15h 58m 30s} (1950)
GRB_DEC:         +12.977d {+12d 58' 39"} (J2000),
                 +12.924d {+12d 55' 25"} (current),
                 +13.117d {+13d 07' 01"} (1950)
GRB_DATE:        18683 TJD;   200 DOY;   19/07/19
GRB_TIME:        53914.39 SOD {14:58:34.39} UT
TRIGGER_INDEX:   146
GRB_PHI:         -34.01 [deg]
GRB_THETA:        12.19 [deg]
DELTA_TIME:      -5.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     62.33 [sigma]
IMAGE_SIGNIF:    18.62 [sigma]
LC_URL:          sw00915381000msb.lc
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 05"}
SUN_DIST:        113.56 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.29d {+22h 01m 10s}  -15.75d {-15d 45' 00"}
MOON_DIST:        93.34 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.90, 43.63 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      234.81, 32.85 [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 = 19.51,-7.18 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:04:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.969d {+12d 58' 08"} (J2000)
ROLL:            299.788d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53985.39 SOD {14:59:45.39} UT,   71.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     585241208
X_OFFSET:        1040 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1200
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00915381000msuni0094.fits
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 05"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.29d {+22h 01m 10s}  -15.75d {-15d 45' 00"}
MOON_DIST:        93.33 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:02:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.969d {+12d 58' 08"} (J2000)
POINT_ROLL:      299.788d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53985.39 SOD {14:59:45.39} UT,   71.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.323
N_STARS:         36
X_OFFSET:        576 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1535 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00915381000msufc0070.fits
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 05"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.28d {+22h 01m 07s}  -15.75d {-15d 45' 11"}
MOON_DIST:        93.32 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [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 19 Jul 19 15:00:02 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.2049d {+16h 00m 49.17s} (J2000),
                 240.4336d {+16h 01m 44.05s} (current),
                 239.6203d {+15h 58m 28.87s} (1950)
GRB_DEC:         +12.9986d {+12d 59' 54.9"} (J2000),
                 +12.9447d {+12d 56' 40.9"} (current),
                 +13.1382d {+13d 08' 17.4"} (1950)
GRB_ERROR:       6.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.69e-08 [erg/cm2/sec]
GRB_SIGNIF:      4.79 [sigma]
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  53975.33 SOD {14:59:35.33} UT,   60.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.18 261.71 243.12
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       118.70d {+07h 54m 48s}  +20.82d {+20d 49' 07"}
SUN_DIST:        113.55 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.26d {+22h 01m 01s}  -15.76d {-15d 45' 35"}
MOON_DIST:        93.32 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.92, 43.64 [deg] galactic lon,lat of the burst
ECL_COORDS:      234.80, 32.87 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.31 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:07:46 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.966d {+12d 57' 59"} (J2000)
POINT_ROLL:      299.789d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  54197.31 SOD {15:03:17.31} UT,   282.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.434
N_STARS:         23
X_OFFSET:        720 [pixels]
Y_OFFSET:        602 [pixels]
X_MAX:           1679 [pixels]
Y_MAX:           1561 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00915381000msufc0282.fits
SUN_POSTN:       118.70d {+07h 54m 49s}  +20.82d {+20d 49' 03"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.32d {+22h 01m 17s}  -15.74d {-15d 44' 31"}
MOON_DIST:        93.36 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:09:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.966d {+12d 57' 59"} (J2000)
ROLL:            299.789d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  54197.31 SOD {15:03:17.31} UT,   282.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     585241420
X_OFFSET:        1040 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1200
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00915381000msuni0306.fits
SUN_POSTN:       118.71d {+07h 54m 49s}  +20.82d {+20d 49' 03"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.33d {+22h 01m 19s}  -15.74d {-15d 44' 19"}
MOON_DIST:        93.37 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:09:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.966d {+12d 57' 59"} (J2000)
ROLL:            299.789d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  54197.31 SOD {15:03:17.31} UT,   282.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     585241420
X_OFFSET:        1040 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1200
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00915381000msuni0306.fits
SUN_POSTN:       118.71d {+07h 54m 49s}  +20.82d {+20d 49' 03"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.33d {+22h 01m 20s}  -15.74d {-15d 44' 18"}
MOON_DIST:        93.37 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Jul 19 15:08:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     915381,   Seg_Num: 0
POINT_RA:        240.217d {+16h 00m 52s} (J2000)
POINT_DEC:       +12.966d {+12d 57' 59"} (J2000)
POINT_ROLL:      299.789d
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  54197.31 SOD {15:03:17.31} UT,   282.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.434
N_STARS:         23
X_OFFSET:        720 [pixels]
Y_OFFSET:        602 [pixels]
X_MAX:           1679 [pixels]
Y_MAX:           1561 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00915381000msufc0282.fits
SUN_POSTN:       118.70d {+07h 54m 49s}  +20.82d {+20d 49' 03"}
SUN_DIST:        113.57 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.32d {+22h 01m 17s}  -15.74d {-15d 44' 28"}
MOON_DIST:        93.36 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.89, 43.62 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      234.82, 32.84 [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 19 Jul 19 15:24:25 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     915381,   Seg_Num: 0
GRB_RA:          240.2070d {+16h 00m 49.67s} (J2000),
                 240.4357d {+16h 01m 44.55s} (current),
                 239.6224d {+15h 58m 29.37s} (1950)
GRB_DEC:         +12.9998d {+12d 59' 59.2"} (J2000),
                 +12.9459d {+12d 56' 45.3"} (current),
                 +13.1394d {+13d 08' 21.7"} (1950)
GRB_ERROR:       3.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18683 TJD;   200 DOY;   19/07/19
IMG_START_TIME:  54333.00 SOD {15:05:33.00} UT,   418.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       118.72d {+07h 54m 52s}  +20.82d {+20d 48' 56"}
SUN_DIST:        113.54 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      330.46d {+22h 01m 50s}  -15.70d {-15d 42' 12"}
MOON_DIST:        93.50 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:       24.92, 43.64 [deg] galactic lon,lat of the burst
ECL_COORDS:      234.80, 32.87 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN Circular #25104
The Fermi GBM team reports the detection of a likely SHORT GRB
At 14:58:34 UT on 19 Jul 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190719C (trigger 585241119.558452 / 190719624).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 244.5, Dec = 4.9 (J2000 degrees, equivalent to J2000 16h 18m, 4d 54'), with a statistical uncertainty of 4.6 degrees.
The angle from the Fermi LAT boresight is 92.0 degrees.
The skymap can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190719624/quicklook/glg_skymap_all_bn190719624.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/bn190719624/quicklook/glg_healpix_all_bn190719624.fit
The GBM light curve can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190719624/quicklook/glg_lc_medres34_bn190719624.gif
GCN Circular #25106
E. Ambrosi (INAF-IASFPA), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), J.D. Gropp (PSU), N. J. Klingler (PSU), H. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), B. Sbarufatti (PSU) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 14:58:34 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190719C (trigger=915381). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 240.210, +12.977 which is
```
   RA(J2000) = 16h 00m 50s
   Dec(J2000) = +12d 58' 39"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a total duration of about 100 sec. The peak count rate was ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 14:59:35.3 UT, 60.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 240.20700, 12.99995 which is equivalent to:
```
   RA(J2000)  = 16h 00m 49.68s
   Dec(J2000) = +12d 59' 59.8"
```
with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 83 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (4.69 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 3.9 (+3.40/-2.88) x 10^21 cm^-2 (90% confidence).
The initial flux in the 0.1 s image was 1.69e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 71 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.
The Fermi GBM team announced the detection of GRB 190719C (GCN Circ 25104). Given the temporal coincidence, it is likely that this is the same burst.
Burst Advocate for this burst is E. Ambrosi (elena.ambrosi AT inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)
GCN Circular #25110
Daniele B. Malesani (DTU Space), Kasper E. Heintz (Univ. Iceland), Daniel A. Perley (LJMU), Bo Milvang-Jensen (DAWN/NBI), Shane Moran (NOT and Univ. Turku) report on behalf of a larger collaboration:
We observed the field of the Fermi and Swift GRB 190719C (Fermi GBM Team, GCN 25104; Ambrosi et al., GCN 25106) using the Nordic Optical Telescope equipped with the ALFOSC camera. A set of 3 exposures by 300 s each was secured in the r band.
At the edge of the currently available XRT error circle (3.6" error radius), a single object is detected at approximate coordinates (J2000):
```
RA = 16:00:49.59
Dec = +13:00:04.3
```
This object is clearly extended, and we measure r = 22.01 +- 0.05 AB using a wide aperture, calibrated against nearby Pan-STARRS objects.
We notice that the object is also detected in the Pan-STARRS r-band image, for which we measure a slightly fainter magnitude r = 22.50 +- 0.16 AB. Visual comparison of the NOT and Pan-STARRS images indicated a shift in the centroid between the two epochs, with excess light in the NOT images to the West of the archival object.
We thus suggest that we are seeing a faint afterglow superimposed on its host galaxy. Further imaging at later epochs is required to carry out image subtraction and provide accurate position and magnitude for the afterglow.
New observations with the NOT will be requested as soon as the telescope is available.
GCN Circular #25125
A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), M.G. Bernardini (INAF-OAB), M. Capalbi (INAF-IASFPA), D.N. Burrows (PSU), J. D. Gropp (PSU), A. Tohuvavohu (PSU) and E. Ambrosi report on behalf of the Swift-XRT team:
We have analysed 2.4 ks of XRT data for GRB 190719C (Ambrosi et al. GCN Circ. 25106), from 64 s to 52.0 ks after the BAT trigger. The data comprise 353 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The refined XRT position is RA, Dec = 240.2069, +13.0000 which is equivalent to:
```
RA (J2000): 16 00 49.65
Dec(J2000): +13 00 00.0
```
with an uncertainty of 3.6 arcsec (radius, 90% confidence). a rise, withpower-law index .
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.42 (+0.04, -0.03). The best-fitting absorption column is 2.26 (+0.19, -0.18) x 10^21 cm^-2, in excess of the Galactic value of 4.7 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.54 (+0.29, -0.25) and a best-fitting absorption column of 9.0 (+9.8, -4.3) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.5 x 10^-11 (5.0 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     9.0 (+9.8, -4.3) x 10^20 cm^-2
Galactic foreground: 4.7 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.54 (+0.29, -0.25)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00915381.
This circular is an official product of the Swift-XRT team.
GCN Circular #25126
K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:
GCN Circ. 25125 was missing the details of the fit to the XRT light-curve. The correct information is as follows:
The light curve can be modelled with an initial power-law decay with an index of alpha=2.11 (+/-0.05), followed by a break at T+387 s to an alpha of 3.7 (+1.0, -0.4). A second break occurs at T+967 s to an alpha of 0.33 (+0.06, -0.09).
If the light curve continues to decay with a power-law decay index of 0.33, the count rate at T+24 hours will be 0.14 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 6.3 x 10^-12 (7.0 x 10^-12) erg cm^-2 s^-1.
We apologise for the omission of these numbers in the earlier circular.
This circular is an official product of the Swift-XRT team.
GCN Circular #25128
N. P. M. Kuin (UCL-MSSL) and E. Ambrosi (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190719C 71 s after the BAT trigger (Ambrosi et al., GCN Circ. 25106). No optical afterglow consistent with the XRT position 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            71          221          147         >20.6
u_FC               283          533          246         >20.6
white               71          756          186         >20.8
v                  613          807           39         >18.7
b                  538          732           39         >19.9
u                  283          706          265         >20.5
w1                 662          856           39         >19.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
The upper limits are consistent with the faint candidate afterglow reported by Malesani et al. (GCN Circ. 25110).
GCN Circular #25129
T. Sakamoto (AGU), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190719C (trigger #915381) (Ambrosi et al., GCN Circ. 25106). The BAT ground-calculated position is RA, Dec = 240.208, 13.005 deg which is
```
   RA(J2000)  =  16h 00m 49.8s
   Dec(J2000) = +13d 00' 18.4"
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~T0 and ends at ~T+200 s. The main peak occurs at ~T0. T90 (15-350 keV) is 185.7 +- 9.7 sec (estimated error including systematics).
The time-averaged spectrum from T-0.09 to T+201.96 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.09. The fluence in the 15-150 keV band is 5.1 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.27 sec in the 15-150 keV band is 5.5 +- 0.3 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/915381/BA/
GCN Circular #25130
S. Poolakkil (UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
At 14:58:34.56 UT on 19 July 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190719C (trigger 585241119/ 190719624), which was also detected by the Swift/BAT (Ambrosi et al. 2019, GCN 25106). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 86 degrees.
The GBM lightcurve shows an initial bright short spike followed by longer duration emission containing multiple peaks. with a duration (T90) of about 175 s (50-300 keV). The time-averaged spectrum from T0-2.0 s to T0+3.0 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.87 +/- 0.18 and the cutoff energy, parameterized as Epeak, is 81 +/- 9 keV.
The event fluence (10-1000 keV) in this time interval is (1.155 +/- 0.082)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T+0.19 s in the 10-1000 keV band is 8.3 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN Circular #25144
Kasper E. Heintz (Univ. Iceland), Daniele B. Malesani (DTU Space), Daniel A. Perley (LJMU), Shane Moran (NOT and Univ. Turku), report on behalf of a larger collaboration:
We observed again the field of GRB 190719C (Ambrosi et al., GCN 25106; Poolakkil & Meegan, GCN 25130) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. A coadded exposure of 3000 s was collected in the SDSS r filter, starting on July 21.125 UT (1.501 days after the GRB).
The source first noticed in our previous observation (Malesani et al., GCN 25110) visually faded and is no longer clearly detected. This was quantitatively confirmed by carrying out image subtraction between the two epochs. A clear residual is visible at coordinates (J2000):
```
RA = 16:00:49.58
Dec = 13:00:04.5
```
This is approximately 0.7" west of the object visible in the archival Pan-STARRS images.
Photometry of the transient computed on the subtraction image (calibrated against nearby stars from the Pan-STARRS catalog) yields r = 23.03 +- 0.12 AB at epoch July 19.88 UT (Malesani et al., GCN 25110). We caution that the actual brightness would be higher if significant residual light were present in our second epoch of observation (this would be ~20% for a t^-1 decay).
The consistency with the X-ray afterglow position (Beardmore et al., GCN 25125) and the optical fading confirm that the source above is the afterglow of GRB 190719C. The close angular proximity with the object seen in the Pan-STARRS images suggests it to be the GRB host galaxy.
GCN Circular #25252
A. Rossi (INAF-OAS), K. E. Heintz (Univ. Iceland), J. P. U. Fynbo (DAWN/NBI), D. B. Malesani (DTU Space), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), S. D. Vergani (Obs. Paris/GEPI and CNRS), D. A. Kann, C. C. Thoene, L. Izzo (HETH/IAA-CSIC), S. Campana (INAF-OAB), G. Pugliese, L. Kaper (Univ. Amsterdam), C. Kouveliotou (GWU), and N. R. Tanvir (Univ. Leicester) report on behalf of the Stargate collaboration:
We observed the location of the candidate host galaxy (Malesani et al., GCN 25110; Heintz et al., GCN 25144) of GRB 190719C (Ambrosi et al., GCN 25106; Poolakkil & Meegan, GCN 25130) using the ESO VLT UT2 (Kueyen) equipped with the X-shooter spectrograph. Our spectra cover the wavelength range 3000-21000 AA, and consist of 4 exposures by 600 s each. Our observations started on 2019 August 01 at 00:48:20 UT, ~13.4 days after the GRB detection. The slit was centred on the nucleus of the nearby object visible in the Pan-STARRS archival images, and was oriented in order to include the afterglow position.
While only weak continuum is visible, several clear emission lines are detected in the near-infrared arm. We identify the [O ii] 3727/3729 doublet, Hbeta, [O iii] 4959, and [O iii] 5007, at a common redshift z = 2.469.
No clear emission (lines nor continuum) is detected at the location of the afterglow, so we have no direct measurement of the GRB redshift. The random association probability with the Pan-STARRS object is however rather small (~3*10^-3), suggesting a physical connection. We also note that the Pan-STARRS galaxy is exceptionally luminous, with an absolute magnitude M = -22.9 AB (computed at 1800 AA rest frame). The measured offset would correspond to 6.6 kpc in projection - a rather large value but not surprising for such a bright host. In conclusion, we propose z = 2.469 as the redshift of GRB 190719C.
We acknowledge excellent support from the ESO observing staff in Paranal, in particular Gaspare Lo Curto, Marcela Espinoza, Boris Haeussler, Aleksandra Solarz, and Steffen Mieske.

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Jochen Greiner, last update: 02-Aug-2019 [Disclaimer]