Gamma-ray Burst 080919

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:05:33 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     325268,   Seg_Num: 0
GRB_RA:          265.289d {+17h 41m 09s} (J2000),
                 265.445d {+17h 41m 47s} (current),
                 264.395d {+17h 37m 35s} (1950)
GRB_DEC:         -42.396d {-42d 23' 45"} (J2000),
                 -42.400d {-42d 24' 00"} (current),
                 -42.371d {-42d 22' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3079 [cnts]    Image_Peak=133 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   483     E_range: 50-350 keV
BKG_INTEN:       29614 [cnts]
BKG_TIME:        300.89 SOD {00:05:00.89} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14728 TJD;   263 DOY;   08/09/19
GRB_TIME:        313.05 SOD {00:05:13.05} UT
GRB_PHI:         -177.60 [deg]
GRB_THETA:        16.29 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     26.00 [sigma]
IMAGE_SIGNIF:    6.57 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +3  +9  +0  +1  +0  +1 
SUN_POSTN:       176.72d {+11h 46m 54s}   +1.42d {+01d 25' 08"}
SUN_DIST:         90.01 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.60d {+02h 38m 24s}  +20.85d {+20d 50' 57"}
MOON_DIST:       136.11 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      266.32,-19.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 206.77,-17.40 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:06:32 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.285d {+17h 41m 08s} (J2000)
POINT_DEC:       -42.397d {-42d 23' 46"} (J2000)
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  383.81 SOD {00:06:23.81} UT,   70.8 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    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:     Fri 19 Sep 08 00:08:56 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     325268,   Seg_Num: 0
GRB_RA:          265.289d {+17h 41m 09s} (J2000),
                 265.445d {+17h 41m 47s} (current),
                 264.395d {+17h 37m 35s} (1950)
GRB_DEC:         -42.396d {-42d 23' 45"} (J2000),
                 -42.400d {-42d 24' 00"} (current),
                 -42.371d {-42d 22' 15"} (1950)
GRB_DATE:        14728 TJD;   263 DOY;   08/09/19
GRB_TIME:        313.05 SOD {00:05:13.05} UT
TRIGGER_INDEX:   483
GRB_PHI:         -177.60 [deg]
GRB_THETA:        16.29 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     26.00 [sigma]
IMAGE_SIGNIF:    6.57 [sigma]
LC_URL:          sw00325268000msb.lc
SUN_POSTN:       176.73d {+11h 46m 54s}   +1.42d {+01d 25' 05"}
SUN_DIST:         90.01 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.63d {+02h 38m 32s}  +20.86d {+20d 51' 35"}
MOON_DIST:       136.14 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      266.32,-19.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 206.77,-17.40 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:10:34 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.285d {+17h 41m 08s} (J2000)
POINT_DEC:       -42.395d {-42d 23' 42"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  395.13 SOD {00:06:35.13} UT,   82.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.514
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00325268000msufc0082.fits
SUN_POSTN:       176.73d {+11h 46m 55s}   +1.42d {+01d 25' 03"}
SUN_DIST:         90.01 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.65d {+02h 38m 36s}  +20.86d {+20d 51' 53"}
MOON_DIST:       136.16 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:11:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.285d {+17h 41m 08s} (J2000)
POINT_DEC:       -42.395d {-42d 23' 42"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  395.13 SOD {00:06:35.13} UT,   82.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.514
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00325268000msufc0082.fits
SUN_POSTN:       176.73d {+11h 46m 55s}   +1.42d {+01d 25' 02"}
SUN_DIST:         90.01 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.66d {+02h 38m 38s}  +20.87d {+20d 52' 02"}
MOON_DIST:       136.17 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.02 [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 Sep 08 00:12:36 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.285d {+17h 41m 08s} (J2000)
POINT_DEC:       -42.395d {-42d 23' 42"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  395.13 SOD {00:06:35.13} UT,   82.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     243475598
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0082.fits
SUN_POSTN:       176.73d {+11h 46m 55s}   +1.42d {+01d 25' 01"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.67d {+02h 38m 41s}  +20.87d {+20d 52' 16"}
MOON_DIST:       136.18 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.02 [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 19 Sep 08 00:13:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.285d {+17h 41m 08s} (J2000)
POINT_DEC:       -42.395d {-42d 23' 42"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  395.13 SOD {00:06:35.13} UT,   82.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     243475598
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0082.fits
SUN_POSTN:       176.73d {+11h 46m 55s}   +1.42d {+01d 25' 01"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.67d {+02h 38m 42s}  +20.87d {+20d 52' 21"}
MOON_DIST:       136.19 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.02 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:25:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.286d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  501.87 SOD {00:08:21.87} UT,   188.8 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.127
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00325268000msufc0188.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 49"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.80d {+02h 39m 12s}  +20.91d {+20d 54' 43"}
MOON_DIST:       136.30 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:26:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.286d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  501.87 SOD {00:08:21.87} UT,   188.8 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.127
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00325268000msufc0188.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 48"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.81d {+02h 39m 14s}  +20.91d {+20d 54' 50"}
MOON_DIST:       136.31 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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 Sep 08 00:27:14 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.286d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  501.87 SOD {00:08:21.87} UT,   188.8 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     243475704
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0188.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 47"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.82d {+02h 39m 16s}  +20.92d {+20d 55' 00"}
MOON_DIST:       136.31 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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 19 Sep 08 00:27:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.286d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  501.87 SOD {00:08:21.87} UT,   188.8 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     243475704
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0188.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 47"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.82d {+02h 39m 17s}  +20.92d {+20d 55' 04"}
MOON_DIST:       136.32 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:28:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1195.53 SOD {00:19:55.53} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.851
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00325268000msufc0882.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 46"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.83d {+02h 39m 19s}  +20.92d {+20d 55' 15"}
MOON_DIST:       136.33 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:29:00 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1195.53 SOD {00:19:55.53} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.851
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00325268000msufc0882.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 45"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.83d {+02h 39m 20s}  +20.92d {+20d 55' 20"}
MOON_DIST:       136.33 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:30:04 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1195.53 SOD {00:19:55.53} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     243476398
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0882.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 44"}
SUN_DIST:         90.00 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.85d {+02h 39m 23s}  +20.93d {+20d 55' 32"}
MOON_DIST:       136.34 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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 19 Sep 08 00:30:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1195.53 SOD {00:19:55.53} UT,   882.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     243476398
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0882.fits
SUN_POSTN:       176.74d {+11h 46m 57s}   +1.41d {+01d 24' 44"}
SUN_DIST:         89.99 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.85d {+02h 39m 24s}  +20.93d {+20d 55' 37"}
MOON_DIST:       136.34 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:31:29 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     325268,   Seg_Num: 0
GRB_RA:          265.2237d {+17h 40m 53.68s} (J2000),
                 265.3795d {+17h 41m 31.07s} (current),
                 264.3304d {+17h 37m 19.29s} (1950)
GRB_DEC:         -42.3687d {-42d 22' 07.3"} (J2000),
                 -42.3727d {-42d 22' 21.6"} (current),
                 -42.3434d {-42d 20' 36.0"} (1950)
GRB_ERROR:       1.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  413.00 SOD {00:06:53.00} UT,   99.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       176.74d {+11h 46m 58s}   +1.41d {+01d 24' 43"}
SUN_DIST:         89.95 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       39.86d {+02h 39m 26s}  +20.93d {+20d 55' 48"}
MOON_DIST:       136.41 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.02, -6.20 [deg] galactic lon,lat of the burst
ECL_COORDS:      266.27,-18.99 [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

GCN Circular #8270
B. Preger (ASDC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU), S. Immler (CRESST/GSFC/UMD), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Perri (ASDC), T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU), G. Stratta (ASDC), M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 00:05:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080919 (trigger=325268). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 265.289, -42.396 which is
```
   RA(J2000)  =  17h 41m 09s
   Dec(J2000) = -42d 23' 45"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single spike with a duration of about 1 sec. The peak count rate was ~3300 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 00:06:23.8 UT, 70.8 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 265.22379, -42.36876 which is equivalent to:
```
   RA(J2000)  = 17h 40m 53.71s
   Dec(J2000) = -42d 22' 07.5"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 199 arcseconds from the BAT onboard position, outside the BAT error circle.
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 82 seconds after the BAT trigger. The 2.7'x2.7' sub-image covers 25% of the BAT error circle and none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 90% of the BAT error circle and 100% of the XRT error circle. No afterglow candidate has been found in the initial data products. Typical upper limit is ~18th magitude. No correction has been made for the expected extinction corresponding to E(B-V) of 0.49. We note that this is a crowded field.
This event lies near to the direction of the Galactic Bulge (long,lat = 348.03, -6.26) and so we cannot immediately rule out the possibility that this source is Galactic. However, the duration and the spectral hardness of this event are consistent with a classical Short GRB.
Burst Advocate for this burst is B. Preger (preger AT asdc.asi.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/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:47:06 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1301.67 SOD {00:21:41.67} UT,   988.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.177
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00325268000msufc0988.fits
SUN_POSTN:       176.75d {+11h 47m 00s}   +1.41d {+01d 24' 28"}
SUN_DIST:         89.98 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       40.02d {+02h 40m 04s}  +20.98d {+20d 58' 43"}
MOON_DIST:       136.50 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Sep 08 00:47:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
POINT_ROLL:      271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1301.67 SOD {00:21:41.67} UT,   988.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.177
N_STARS:         190
X_OFFSET:        458 [pixels]
Y_OFFSET:        546 [pixels]
X_MAX:           1417 [pixels]
Y_MAX:           1505 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00325268000msufc0988.fits
SUN_POSTN:       176.75d {+11h 47m 00s}   +1.41d {+01d 24' 27"}
SUN_DIST:         89.98 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       40.02d {+02h 40m 06s}  +20.98d {+20d 58' 51"}
MOON_DIST:       136.50 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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 Sep 08 00:48:43 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1301.67 SOD {00:21:41.67} UT,   988.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     243476504
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0988.fits
SUN_POSTN:       176.75d {+11h 47m 00s}   +1.41d {+01d 24' 26"}
SUN_DIST:         89.98 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       40.03d {+02h 40m 08s}  +20.98d {+20d 59' 01"}
MOON_DIST:       136.51 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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 19 Sep 08 00:49:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     325268,   Seg_Num: 0
POINT_RA:        265.287d {+17h 41m 09s} (J2000)
POINT_DEC:       -42.394d {-42d 23' 36"} (J2000)
ROLL:            271.990d
IMG_START_DATE:  14728 TJD;   263 DOY;   08/09/19
IMG_START_TIME:  1301.67 SOD {00:21:41.67} UT,   988.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     243476504
X_OFFSET:        777 [pixels]
Y_OFFSET:        865 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       937
Y_GRB_POS:       1025
BINNING_INDEX:   1
IM_URL:          sw00325268000msuni0988.fits
SUN_POSTN:       176.75d {+11h 47m 00s}   +1.41d {+01d 24' 26"}
SUN_DIST:         89.98 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:       40.04d {+02h 40m 09s}  +20.99d {+20d 59' 06"}
MOON_DIST:       136.52 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      348.03, -6.26 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      266.32,-19.01 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sources_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #8271
S. Covino, L.A. Antonelli, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F. D'Alessio, P. D'Avanzo, F. Fiore, D. Fugazza, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, E. Maiorano, N. Masetti, A. Melandri, E. Meurs, L. Nicastro, E. Palazzi, E. Pian, S. Piranomonte, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V.Testa, S.D. Vergani, F. Vitali report on behalf of the REM team:
The robotic 60-cm REM telescope located at La Silla (Chile) observed automatically the field of the short GRB 080919 (Preger et al. GCN 8270) starting from about 74s s after the GRB time. For a technical problem the images are of mediocre quality. However, we detect a source consistent with the position of the XRT transient and already present in the 2MASS catalogue (RA=17:40:53.778, DEC=-42:22:07.36) with H = 13.73 +- 0.03. In our frames the source appears at about H~14.0, constant within the duration of the REM observations (about 30min).
At the present stage, beyond the position consistency, we can not infer whether this source is related or not to the fading X-ray source reported in Preger et al. (GCN 8270). Further observations are then encouraged.
GCN Circular #8275
W.H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J.R. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H.A. Krimm (GSFC/USRA), C.B. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D.M. Palmer (LANL), A.M. Parsons (GSFC), B. Preger (ASDC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T.N. Ukwatta (GWU) (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 080919 (trigger #325268) (Preger, et al., GCN Circ. 8270). The BAT ground-calculated position is RA, Dec = 265.221, -42.375 deg which is
```
 RA(J2000)  =  17h 40m 53.0s
 Dec(J2000) = -42d 22' 29.5"
```
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 99%.
The mask-weighted light curve shows a broad peak of approximately 750 msec duration starting at T+0 followed immediately by a weaker ~400 msec peak seen mostly below 50 keV. T90 (15-350 keV) is 0.6 +- 0.1 sec (estimated error including systematics).
The time-averaged spectrum from T+0.1 to T+0.8 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.10 +- 0.26. The fluence in the 15-150 keV band is 7.2 +- 1.1 x 10-8 erg/cm2. The 1-sec peak photon flux measured from T-0.08 sec in the 15-150 keV band is 1.2 +- 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/325268/BA/
GCN Circular #8276
B. Preger (ASDC), G. Stratta (ASDC), M. Perri (ASDC) report on behalf of the Swift XRT team:
The Swift XRT started observing the field of GRB080919 (trigger=325268; Preger et al., GCN Circ. 8270) at 00:06:23.8 UT, 70.8 seconds after the trigger.
The position of the X-ray afterglow is: RA, Dec= 265.223958, -42.368667 which is equivalent to:
```
RA (J2000): 17 40 53.75
Dec (J2000): -42 22 07.2
```
with an uncertainty of 2.0 arcsec (90% confidence).
The X-ray light curve from T0+74 s to T0+25 ks shows a fading behavior. At ~T0 + 200 data show a 200 s long flare peaking at ~T0 + 240 s with peak count rate of (1.2+/-0.3) cts/s that is about a factor of 4 above the underlying continuum. Excluding the flare, the light curve can be well modelled with a broken power law, with best fit first decay index alpha_1 = 2.2+/-0.2, a temporal break at ~T0 + 891 s and second decay index alpha_2= 0.8+/-0.2.
A 4.5 ks exposure X-ray spectrum from T0+100 s to T0+7811 s can be fit by an absorbed power-law model with a photon index of 2.0 (+0.5 -0.4) and a column density of 3.9 (+3.2) (-2.3) x 10^21 cm^-2 in addition to the Galactic column density value in the direction of the burst (2.6 x 10^21 cm^-2, Kalberla et al. 2005).
Providing the source continues to decay at the same rate, we predict an observed flux of about 2 x 10^-14 erg cm^-2 s^-1 at T0+1 days.
This circular is an official product of the Swift-XRT team.
GCN Circular #8277
S. Immler (CRESST/GSFC/UMD) and S. T. Holland (CRESST/USRA/GSFC), on behalf of the Swift Team:
Swift UVOT started observing GRB 080919 (Preger et al. GCN 8270) 82 seconds after the BAT trigger. The source detected by REM (Covino et al. GCN 8271) is detected in all optical and in the uvw1 filter and shows no signs of fading over a period of ~25 ks after the trigger. It is the only optical source detected within the XRT error circle (Preger et al. GCN 8276). The following UVOT magnitudes (and 3-sigma upper limits) are measured:
```
Filter   T_start   T_stop   Exp(s)  Mag (3-sigma upper limit)
-----------------------------------------------------
white      82    18561   2,203   18.4=B10.1
v         188    23441   2,766   17.2=B10.1
b         670    17648   1,375   18.3=B10.1
u         645     7509     510   19.6=B10.3
uvw1      620    25158   1,301   20.4=B10.5
uvm2      594    24347   1,278    >20.4
uvw2      701    19375   1,809    >20.8
```
The quoted upper limits have not been corrected for the expected=20 Galactic extinction along the line of sight of E(B-V) of 0.49 mag=20 (Schlegel et al. 1998). All photometry is on the UVOT flight system=20 described in Poole et al. (2008, MNRAS, 383, 627).
GCN Report 172.1
GCN_Report 172.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_172_1.pdf by B. Preger at ASDC titled: "Final Swift report on GRB 080919"

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Jochen Greiner, last update: 28-Oct-2008 [Disclaimer]