Gamma-ray Burst 100724A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:42:39 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     429868,   Seg_Num: 0
GRB_RA:          194.566d {+12h 58m 16s} (J2000),
                 194.704d {+12h 58m 49s} (current),
                 193.912d {+12h 55m 39s} (1950)
GRB_DEC:         -11.121d {-11d 07' 16"} (J2000),
                 -11.178d {-11d 10' 40"} (current),
                 -10.851d {-10d 51' 04"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5995 [cnts]    Image_Peak=280 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   147     E_range: 25-100 keV
BKG_INTEN:       35910 [cnts]
BKG_TIME:        2521.98 SOD {00:42:01.98} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15401 TJD;   205 DOY;   10/07/24
GRB_TIME:        2539.20 SOD {00:42:19.20} UT
GRB_PHI:          38.54 [deg]
GRB_THETA:        33.62 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.15 [sigma]
IMAGE_SIGNIF:    10.55 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +0  +0  +0 -23  +0 
SUN_POSTN:       123.26d {+08h 13m 03s}  +19.92d {+19d 55' 29"}
SUN_DIST:         76.85 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.94d {+18h 35m 45s}  -23.49d {-23d 29' 23"}
MOON_DIST:        80.35 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.64, 51.71 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      197.70, -4.52 [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 = 199.49,-4.47 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:43:55 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2628.10 SOD {00:43:48.10} UT,   88.9 [sec] since BAT Trigger Time
COUNTS:          2    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:     Sat 24 Jul 10 00:46:22 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     429868,   Seg_Num: 0
GRB_RA:          194.566d {+12h 58m 16s} (J2000),
                 194.704d {+12h 58m 49s} (current),
                 193.912d {+12h 55m 39s} (1950)
GRB_DEC:         -11.121d {-11d 07' 16"} (J2000),
                 -11.178d {-11d 10' 40"} (current),
                 -10.851d {-10d 51' 04"} (1950)
GRB_DATE:        15401 TJD;   205 DOY;   10/07/24
GRB_TIME:        2539.20 SOD {00:42:19.20} UT
TRIGGER_INDEX:   147
GRB_PHI:          38.54 [deg]
GRB_THETA:        33.62 [deg]
DELTA_TIME:      38.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.15 [sigma]
IMAGE_SIGNIF:    10.55 [sigma]
LC_URL:          sw00429868000msb.lc
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 27"}
SUN_DIST:         76.85 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.97d {+18h 35m 53s}  -23.49d {-23d 29' 06"}
MOON_DIST:        80.38 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.64, 51.71 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      197.70, -4.52 [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 = 199.49,-4.47 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:47:18 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.799d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2631.50 SOD {00:43:51.50} UT,   92.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.670
N_STARS:         35
X_OFFSET:        264 [pixels]
Y_OFFSET:        612 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1571 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0092.fits
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 27"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.98d {+18h 35m 55s}  -23.48d {-23d 29' 01"}
MOON_DIST:        80.41 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:47:18 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.799d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2631.50 SOD {00:43:51.50} UT,   92.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.670
N_STARS:         35
X_OFFSET:        264 [pixels]
Y_OFFSET:        612 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1571 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0092.fits
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 27"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.98d {+18h 35m 55s}  -23.48d {-23d 29' 01"}
MOON_DIST:        80.41 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:47:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.799d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2631.50 SOD {00:43:51.50} UT,   92.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.670
N_STARS:         35
X_OFFSET:        264 [pixels]
Y_OFFSET:        612 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1571 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0092.fits
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 27"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.98d {+18h 35m 56s}  -23.48d {-23d 29' 00"}
MOON_DIST:        80.42 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:48:08 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     429868,   Seg_Num: 0
GRB_RA:          194.5437d {+12h 58m 10.48s} (J2000),
                 194.6819d {+12h 58m 43.65s} (current),
                 193.8899d {+12h 55m 33.58s} (1950)
GRB_DEC:         -11.1025d {-11d 06' 08.9"} (J2000),
                 -11.1594d {-11d 09' 33.7"} (current),
                 -10.8326d {-10d 49' 57.4"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2639.00 SOD {00:43:59.00} UT,   99.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 27"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      278.99d {+18h 35m 57s}  -23.48d {-23d 28' 57"}
MOON_DIST:        80.42 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the burst
ECL_COORDS:      197.68, -4.51 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:49:16 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
ROLL:            293.799d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2631.50 SOD {00:43:51.50} UT,   92.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     301625037
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0099.fits
SUN_POSTN:       123.27d {+08h 13m 04s}  +19.92d {+19d 55' 26"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.00d {+18h 35m 59s}  -23.48d {-23d 28' 52"}
MOON_DIST:        80.43 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:49:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.543d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
ROLL:            293.799d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2631.50 SOD {00:43:51.50} UT,   92.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     301625037
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0099.fits
SUN_POSTN:       123.27d {+08h 13m 05s}  +19.92d {+19d 55' 26"}
SUN_DIST:         76.82 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.00d {+18h 36m 00s}  -23.48d {-23d 28' 50"}
MOON_DIST:        80.43 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:55:24 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2843.39 SOD {00:47:23.39} UT,   304.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.237
N_STARS:         62
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00429868000msufc0304.fits
SUN_POSTN:       123.27d {+08h 13m 05s}  +19.92d {+19d 55' 23"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.05d {+18h 36m 13s}  -23.47d {-23d 28' 23"}
MOON_DIST:        80.48 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:55:24 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2843.39 SOD {00:47:23.39} UT,   304.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.237
N_STARS:         62
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00429868000msufc0304.fits
SUN_POSTN:       123.27d {+08h 13m 05s}  +19.92d {+19d 55' 23"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.05d {+18h 36m 13s}  -23.47d {-23d 28' 23"}
MOON_DIST:        80.48 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:55:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2843.39 SOD {00:47:23.39} UT,   304.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.237
N_STARS:         62
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00429868000msufc0304.fits
SUN_POSTN:       123.27d {+08h 13m 06s}  +19.92d {+19d 55' 23"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.06d {+18h 36m 14s}  -23.47d {-23d 28' 21"}
MOON_DIST:        80.49 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:56:45 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
ROLL:            293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2843.39 SOD {00:47:23.39} UT,   304.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     301625249
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0311.fits
SUN_POSTN:       123.27d {+08h 13m 06s}  +19.92d {+19d 55' 22"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.07d {+18h 36m 16s}  -23.47d {-23d 28' 16"}
MOON_DIST:        80.50 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:57:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.102d {-11d 06' 08"} (J2000)
ROLL:            293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2843.39 SOD {00:47:23.39} UT,   304.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     301625249
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0311.fits
SUN_POSTN:       123.27d {+08h 13m 06s}  +19.92d {+19d 55' 22"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.07d {+18h 36m 16s}  -23.47d {-23d 28' 15"}
MOON_DIST:        80.50 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 00:57:07 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     429868,   Seg_Num: 0
GRB_RA:          194.5435d {+12h 58m 10.43s} (J2000),
                 194.6817d {+12h 58m 43.60s} (current),
                 193.8897d {+12h 55m 33.53s} (1950)
GRB_DEC:         -11.1029d {-11d 06' 10.4"} (J2000),
                 -11.1598d {-11d 09' 35.2"} (current),
                 -10.8330d {-10d 49' 58.8"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  2639.00 SOD {00:43:59.00} UT,   99.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       123.27d {+08h 13m 06s}  +19.92d {+19d 55' 22"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.07d {+18h 36m 17s}  -23.47d {-23d 28' 14"}
MOON_DIST:        80.50 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the burst
ECL_COORDS:      197.68, -4.51 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 01:01:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.103d {-11d 06' 09"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  3397.39 SOD {00:56:37.39} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.407
N_STARS:         60
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0858.fits
SUN_POSTN:       123.28d {+08h 13m 06s}  +19.92d {+19d 55' 20"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.11d {+18h 36m 26s}  -23.47d {-23d 27' 55"}
MOON_DIST:        80.53 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 01:01:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.103d {-11d 06' 09"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  3397.39 SOD {00:56:37.39} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.407
N_STARS:         60
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0858.fits
SUN_POSTN:       123.28d {+08h 13m 06s}  +19.92d {+19d 55' 20"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.11d {+18h 36m 26s}  -23.47d {-23d 27' 55"}
MOON_DIST:        80.53 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 01:01:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.103d {-11d 06' 09"} (J2000)
POINT_ROLL:      293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  3397.39 SOD {00:56:37.39} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.407
N_STARS:         60
X_OFFSET:        24 [pixels]
Y_OFFSET:        372 [pixels]
X_MAX:           1463 [pixels]
Y_MAX:           1811 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00429868000msufc0858.fits
SUN_POSTN:       123.28d {+08h 13m 06s}  +19.92d {+19d 55' 20"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.11d {+18h 36m 26s}  -23.47d {-23d 27' 53"}
MOON_DIST:        80.54 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 01:03:11 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.103d {-11d 06' 09"} (J2000)
ROLL:            293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  3397.39 SOD {00:56:37.39} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     301625803
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0865.fits
SUN_POSTN:       123.28d {+08h 13m 07s}  +19.92d {+19d 55' 19"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.12d {+18h 36m 30s}  -23.46d {-23d 27' 45"}
MOON_DIST:        80.55 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 10 01:03:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     429868,   Seg_Num: 0
POINT_RA:        194.542d {+12h 58m 10s} (J2000)
POINT_DEC:       -11.103d {-11d 06' 09"} (J2000)
ROLL:            293.800d
IMG_START_DATE:  15401 TJD;   205 DOY;   10/07/24
IMG_START_TIME:  3397.39 SOD {00:56:37.39} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     301625803
X_OFFSET:        583 [pixels]
Y_OFFSET:        931 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       743
Y_GRB_POS:       1091
BINNING_INDEX:   1
IM_URL:          sw00429868000msuni0865.fits
SUN_POSTN:       123.28d {+08h 13m 07s}  +19.92d {+19d 55' 19"}
SUN_DIST:         76.81 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      279.13d {+18h 36m 31s}  -23.46d {-23d 27' 44"}
MOON_DIST:        80.55 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:      305.60, 51.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      197.67, -4.51 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #10968
C. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), J. M. Gelbord (PSU), S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), C. A. Swenson (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 00:42:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100724A (trigger=429868). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 194.566, -11.121 which is
```
   RA(J2000)  =  12h 58m 16s
   Dec(J2000) = -11d 07' 16"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double peak structure with a duration of about 70 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0.5 sec after the trigger.
The XRT began observing the field at 00:43:48.1 UT, 88.9 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 194.5434, -11.1027 which is equivalent to:
```
   RA(J2000)  = 12h 58m 10.41s
   Dec(J2000) = -11d 06' 09.7"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 104 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 (3.35e+20 cm^-2, Kalberla et al. 2005), with an excess column of 9.7 (+13.63/-5.98) x 10^20 cm^-2 (90% confidence).
UVOT took a finding chart exposure of nominal 250 seconds with the U filter starting 304 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. Data from the 2.7'x2.7' sub-image are not available at this time. 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.
Burst Advocate for this burst is C. B. Markwardt (Craig.Markwardt AT nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #10969
F. Olivares E., J. Greiner, P. Afonso (all MPE Garching), and S. Klose (TLS Tautenburg) report on behalf of the GROND team:
GROND (Greiner et al. 2008, PASP 120, 405), the 7-channel imager mounted at the 2.2m ESO/MPI telescope on La Silla, started follow-up observations of GRB 100724A (Swift trigger 429868; Markwardt et al. 2010, GCN 10968) on July 24 at 0:45 UT (about 3 min after the trigger).
Within the revised 2.4 arcsec XRT error circle we find an afterglow candidate at position RA, Dec (J2000) = 12:58:10.4, -11:06:09, visible in all bands. We conclude that the redshift is less than 3.5.
Observations are ongoing.
GCN Circular #10970
F. Olivares E., J. Greiner, P. Afonso (all MPE Garching), and S. Klose (TLS Tautenburg), report on behalf of the GROND team:
The afterglow candidate reported by Olivares et al. (GCN 10969) is clearly fading. Between mid-times of 00:49 UT and 01:14 UT the object faded by 1.3 magnitudes, corresponding to a power-law decay index of about 0.7. We therefore confirm this object to be the afterglow of GRB 100724A.
GCN Circular #10971
C. C. Thoene, A. de Ugarte Postigo (INAF-OAB), P. Vreeswijk (Univ. Iceland), P. D'Avanzo, S. Covino (INAF-OAB), J. P. U. Fynbo (DARK/NBI) and N. Tanvir (Univ. Leicester) report on behalf of the X-shooter collaboration
We observed the optical afterglow of GRB 100724A (Markwardt et al., GCN 10968, Olivares et al., GCN 10969, 10970) with X-shooter at the VLT in RRM mode on July 24, 2010, starting at 00:53 UT (11 min after the burst).
We detect several absorption lines including Fe II 2344, 2383, 2586, 2600, the Mg II doublet (2796, 2803) and Mg I 2852 at a common redshift of 1.288 which we suggest to be the redshift of the GRB. The wavelength calibration was obtained from archival files and is therefore considered preliminary.
We thank the Paranal staff for performing the observations, in particular Lorenzo Monaco and Andres Pino.
GCN Circular #10972
C. B. Markwardt (GSFC/UMD), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), 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+644 sec from recent telemetry downlinks, we report further analysis of BAT GRB 100724A (trigger #429868) (Markwardt, et al., GCN Circ. 10968). The BAT ground-calculated position is RA, Dec = 194.569, -11.095 deg, which is
```
   RA(J2000)  =  12h 58m 16.5s 
   Dec(J2000) = -11d 05' 41.7" 
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 43%.
The mask-weighted light curve shows several overlapping peaks starting at T+0.0 sec and ending at T+4.0 sec. There is a weak roughly exponential tail extending out to ~T+20 sec. T90 (15-350 keV) is 1.4 +- 0.2 sec (estimated error including systematics). The initial description of the lightcurve given in GCN Circ 10968 as being 70 sec long was confused by the nearly simultaneous, but different burst detected by Fermi. The BAT mask-weighted lightcurve clearly shows that the 100724A burst is only single episode around T_zero. There is nothing in the mask-weighted lightcurve in the T+40 to T+70sec range.
The time-averaged spectrum from T+0.1 to T+1.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.92 +- 0.21. The fluence in the 15-150 keV band is 1.6 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.09 sec in the 15-150 keV band is 1.9 +- 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/429868/BA/
GCN Circular #10973
C. A. Swenson (PSU) and C. B. Markwardt (CRESST/GSFC/UMD) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 100724A=20 74s after the BAT trigger (Markwardt et al., GCN 10968). We detect a=20 source at the position of the detected X-ray source (Markwardt et al.,=20 GCN 10968) and the location reported by GROND (Olivares et al., GCN=20 10969). The source is clearly fading in the UVOT white filter between=20 the first finding chart and a later observation.
The magnitudes and 3-sigma upper limits using the UVOT photometric=20 system (Poole et al., 2008, MNRAS, 383, 627) for finding chart exposures=20 (FC) and the summed images are:
```
Filter      T_start    T_stop    Exp(s)    Magnitude/3-sigma upper limit
----------------------------------------------------------------------
white (FC)      92       242      147            18.46 =B1 0.11
white          584       775       39            > 19.71
u     (FC)     304       554      246            18.54 =B1 0.15
u              706       726       19            18.17 =B1 0.37
v               74      1050       60            > 18.31
b              559       751       39            > 18.99
uvw1           682       702       19            > 17.96
uvm2           658       850       39            > 18.19
uvw2           609      1034       58            > 18.97
```
The quoted upper limits have not been corrected for the expected=20 Galactic extinction along the line of sight of E_(B-V) =3D 0.043 mag=20 (Schlegel, et al., 1998, ApJS, 500, 525).
GCN Circular #10974
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 6782 s of XRT Photon Counting mode data and 7 UVOT images for GRB 100724A, 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 = 194.54312, -11.10263 which is equivalent to:
```
RA (J2000): 12h 58m 10.35s
Dec (J2000): -11d 06' 09.5"
```
with an uncertainty of 1.5 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #10975
V. Mangano (INAF IASF-PA), B. Sbarufatti (INAF OAB/INAF IASF-PA) and C. B. Markwardt (CRESST/GSFC/UMD) report on behalf of the Swift-XRT team:
We have analysed 10 ks of XRT data for GRB 100724A (Markwardt et al. GCN Circ. 10968), from 96 s to 25.1 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The light curve can be modelled with a broken power-law decay with an initial decay index of alpha1=0.3 (+/-0.1) , a break at T+525 (+/-90) s and a final decay index of alpha2=1.07 (+/-0.03).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.98 (+0.20, -0.19). The best-fitting absorption column is consistent with the Galactic value of 3.4 x 10^20 cm-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.8 x 10^-11 (5.6 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 1.1, the count rate at T+24 hours will be 2.4e-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-13 (1.3 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/00429868.
This circular is an official product of the Swift-XRT team.
GCN Circular #10976
T. N. Ukwatta (GWU/GSFC), S. D. Barthelmy (GSFC), N. Gehrels (GSFC), C. B. Markwardt (CRESST/GSFC/UMD), J. Norris (U. Denver), and T. Sakamoto (GSFC/UMBC) (for the Swift-BAT team):
For GRB 100724A (Markwardt et al GCN 10968), the spectral lag analysis of the mask-weighted data from T-0.5 sec to T+2 sec yields a lag of 316 +/- 82 msec for the 25-50 to 50-100 keV bands using light curve binning of 64 msec. This relatively large observed lag value puts this burst in the long burst category.
The observed T90 (1.4 +/- 0.2 sec; Swift/BAT 15-350 keV, Markwardt et al., GCN 10972) value is in the middle of the the soft/long bimodal distribution. The power-law fit to the BAT spectrum gives index (PLI) of 1.92 +/- 0.21 (Markwardt et al., GCN 10972), which is in the middle of the Long GRB PLI distribution and in the soft side tail of the Short GRB PLI distribution.
In summary, the observed T90 value for GRB 100724A is inconclusive. The relatively large spectral lag value and soft spectrum points towards long soft burst. Our conclusion is that this burst is likely to be in the long burst category. Further observations are encouraged to characterize the host galaxy.

Back to JG's homepage

Jochen Greiner, last update: 24-Jul-2010 [Disclaimer]