Gamma-ray Burst 080723

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:19:46 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     317662,   Seg_Num: 0
GRB_RA:          274.512d {+18h 18m 03s} (J2000),
                 274.628d {+18h 18m 31s} (current),
                 273.838d {+18h 15m 21s} (1950)
GRB_DEC:          -6.923d {-06d 55' 20"} (J2000),
                  -6.919d {-06d 55' 06"} (current),
                  -6.943d {-06d 56' 33"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5245 [cnts]    Image_Peak=250 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       31454 [cnts]
BKG_TIME:        15549.03 SOD {04:19:09.03} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14670 TJD;   205 DOY;   08/07/23
GRB_TIME:        15564.39 SOD {04:19:24.39} UT
GRB_PHI:           6.89 [deg]
GRB_THETA:         7.15 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     18.05 [sigma]
IMAGE_SIGNIF:    8.42 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +5  +0  +1 +86  +1 
SUN_POSTN:       122.90d {+08h 11m 36s}  +20.00d {+20d 00' 03"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.61d {+23h 46m 26s}   +2.19d {+02d 11' 27"}
MOON_DIST:        82.31 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.94,  4.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      274.67, 16.44 [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 = 249.86,-14.70 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:20:56 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.927d {-06d 55' 37"} (J2000)
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15650.16 SOD {04:20:50.16} UT,   85.8 [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:     Wed 23 Jul 08 04:22:58 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.927d {-06d 55' 37"} (J2000)
POINT_ROLL:      298.241d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15652.61 SOD {04:20:52.61} UT,   88.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.229
N_STARS:         120
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0088.fits
SUN_POSTN:       122.90d {+08h 11m 37s}  +20.00d {+20d 00' 02"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.63d {+23h 46m 32s}   +2.20d {+02d 12' 16"}
MOON_DIST:        82.32 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:23:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.927d {-06d 55' 37"} (J2000)
POINT_ROLL:      298.241d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15652.61 SOD {04:20:52.61} UT,   88.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.229
N_STARS:         120
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0088.fits
SUN_POSTN:       122.90d {+08h 11m 37s}  +20.00d {+20d 00' 01"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.64d {+23h 46m 33s}   +2.21d {+02d 12' 26"}
MOON_DIST:        82.33 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:24:28 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.927d {-06d 55' 37"} (J2000)
ROLL:            298.241d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15652.61 SOD {04:20:52.61} UT,   88.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     238479655
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0088.fits
SUN_POSTN:       122.90d {+08h 11m 37s}  +20.00d {+20d 00' 01"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.65d {+23h 46m 35s}   +2.21d {+02d 12' 39"}
MOON_DIST:        82.33 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:24:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.927d {-06d 55' 37"} (J2000)
ROLL:            298.241d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15652.61 SOD {04:20:52.61} UT,   88.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     238479655
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0088.fits
SUN_POSTN:       122.90d {+08h 11m 37s}  +20.00d {+20d 00' 01"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.65d {+23h 46m 36s}   +2.21d {+02d 12' 45"}
MOON_DIST:        82.34 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [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:     Wed 23 Jul 08 04:32:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15758.58 SOD {04:22:38.58} UT,   194.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.279
N_STARS:         190
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0194.fits
SUN_POSTN:       122.91d {+08h 11m 38s}  +20.00d {+19d 59' 57"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.71d {+23h 46m 51s}   +2.24d {+02d 14' 41"}
MOON_DIST:        82.40 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:33:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15758.58 SOD {04:22:38.58} UT,   194.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.279
N_STARS:         190
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0194.fits
SUN_POSTN:       122.91d {+08h 11m 38s}  +20.00d {+19d 59' 57"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.72d {+23h 46m 52s}   +2.25d {+02d 14' 51"}
MOON_DIST:        82.41 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:33:19 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     317662,   Seg_Num: 0
GRB_RA:          274.4898d {+18h 17m 57.5s} (J2000),
                 274.6052d {+18h 18m 25.2s} (current),
                 273.8156d {+18h 15m 15.7s} (1950)
GRB_DEC:          -6.8993d {-06d 53' 57.4"} (J2000),
                  -6.8955d {-06d 53' 43.8"} (current),
                  -6.9195d {-06d 55' 10.0"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15662.00 SOD {04:21:02.00} UT,   97.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       122.91d {+08h 11m 38s}  +20.00d {+19d 59' 56"}
SUN_DIST:        149.59 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.72d {+23h 46m 52s}   +2.25d {+02d 14' 55"}
MOON_DIST:        82.45 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.23 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.65, 16.47 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:33:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15758.58 SOD {04:22:38.58} UT,   194.2 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     238479761
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0194.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 56"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.72d {+23h 46m 54s}   +2.25d {+02d 15' 04"}
MOON_DIST:        82.42 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:34:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  15758.58 SOD {04:22:38.58} UT,   194.2 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     238479761
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0194.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 56"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.73d {+23h 46m 54s}   +2.25d {+02d 15' 11"}
MOON_DIST:        82.42 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [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:     Wed 23 Jul 08 04:36:58 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16418.49 SOD {04:33:38.49} UT,   854.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.232
N_STARS:         115
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0854.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 55"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.75d {+23h 46m 60s}   +2.26d {+02d 15' 51"}
MOON_DIST:        82.44 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:37:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16418.49 SOD {04:33:38.49} UT,   854.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.232
N_STARS:         115
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0854.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 54"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.75d {+23h 47m 01s}   +2.27d {+02d 15' 60"}
MOON_DIST:        82.45 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:38:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16418.49 SOD {04:33:38.49} UT,   854.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     238480421
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0854.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 54"}
SUN_DIST:        149.64 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.76d {+23h 47m 02s}   +2.27d {+02d 16' 13"}
MOON_DIST:        82.45 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:38:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 39"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16418.49 SOD {04:33:38.49} UT,   854.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     238480421
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0854.fits
SUN_POSTN:       122.91d {+08h 11m 39s}  +20.00d {+19d 59' 54"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.76d {+23h 47m 03s}   +2.27d {+02d 16' 19"}
MOON_DIST:        82.46 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [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 #8000
M. Stamatikos (NASA/ORAU), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 04:19:24 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080723 (trigger=317662). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 274.512, -6.923 which is
```
   RA(J2000) = 18h 18m 03s
   Dec(J2000) = -06d 55' 20"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Because the BAT light curve has not been received, we cannot comment on the burst profile at this time. However, there is a strong 8.4 sigma excess detected in the scaled map image, which strongly suggests a real gamma-ray burst occurred.
The XRT began observing the field at 04:20:50.2 UT, 85.8 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 274.48985, -6.89931 which is equivalent to:
```
   RA(J2000)  = 18h 17m 57.56s
   Dec(J2000) = -06d 53' 57.5"
```
with an uncertainty of 2.7 arcseconds (radius, 90% containment). This location is 116 arcseconds from the BAT onboard position, within the BAT error circle.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (3.94e+21 cm^-2, Kalberla et al. 2005), with an excess column of 5.7 (+6.36/-4.59) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 92 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 0% of the XRT error circle. The 8'x8' region for the list of sources generated on- board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the large Galactic expected extinction corresponding to E(B-V) of 1.3 mag.
Burst Advocate for this burst is M. Stamatikos (michael AT milkyway.gsfc.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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:42:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 38"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16525.89 SOD {04:35:25.89} UT,   961.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.301
N_STARS:         185
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0961.fits
SUN_POSTN:       122.92d {+08h 11m 40s}  +20.00d {+19d 59' 52"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.79d {+23h 47m 11s}   +2.29d {+02d 17' 18"}
MOON_DIST:        82.49 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:43:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 38"} (J2000)
POINT_ROLL:      298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16525.89 SOD {04:35:25.89} UT,   961.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.301
N_STARS:         185
X_OFFSET:        577 [pixels]
Y_OFFSET:        469 [pixels]
X_MAX:           1536 [pixels]
Y_MAX:           1428 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00317662000msufc0961.fits
SUN_POSTN:       122.92d {+08h 11m 40s}  +20.00d {+19d 59' 51"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.80d {+23h 47m 12s}   +2.29d {+02d 17' 26"}
MOON_DIST:        82.50 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:44:08 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 38"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16525.89 SOD {04:35:25.89} UT,   961.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     238480528
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0961.fits
SUN_POSTN:       122.92d {+08h 11m 40s}  +20.00d {+19d 59' 51"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.81d {+23h 47m 14s}   +2.29d {+02d 17' 42"}
MOON_DIST:        82.50 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Jul 08 04:44:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     317662,   Seg_Num: 0
POINT_RA:        274.530d {+18h 18m 07s} (J2000)
POINT_DEC:        -6.928d {-06d 55' 38"} (J2000)
ROLL:            298.238d
IMG_START_DATE:  14670 TJD;   205 DOY;   08/07/23
IMG_START_TIME:  16525.89 SOD {04:35:25.89} UT,   961.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     238480528
X_OFFSET:        896 [pixels]
Y_OFFSET:        788 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1056
Y_GRB_POS:       948
BINNING_INDEX:   1
IM_URL:          sw00317662000msuni0961.fits
SUN_POSTN:       122.92d {+08h 11m 40s}  +20.00d {+19d 59' 51"}
SUN_DIST:        149.63 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      356.81d {+23h 47m 15s}   +2.30d {+02d 17' 48"}
MOON_DIST:        82.51 [deg]
MOON_ILLUM:      77 [%]
GAL_COORDS:       22.95,  4.19 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.69, 16.44 [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 #8001
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 5309 s of XRT Photon Counting mode data and 9 UVOT images for GRB 080723, 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 = 274.49035, -6.89952 which is equivalent to:
```
RA (J2000): 18h 17m 57.68s
Dec (J2000): -06d 53' 58.3"
```
with an uncertainty of 1.7 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 http://www.swift.ac.uk/xrt_positions/Goad.pdf), the current algorithm is an extension of this method.
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #8004
A.P. Beardmore (U. Leicester) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift-XRT team :
We have analysed the first two orbits of Swift-XRT data obtained from GRB 080723A (trigger 317662; Stamatikos et al., GCN Circ. 8000). The data were taken in photon counting mode and have an exposure of 2.83 ks, spanning 88 s to 7.44 ks after the trigger. The UVOT-enhanced XRT position was given by Beardmore et al. in GCN Circ. 8001.
The light curve can be modelled by a doubly broken power-law, with an inital decay of alpha1 = 1.77 +0.34 -0.25 which flattens to a shallow decay of alpha2 = 0.05 +/- 0.24 at a time tbreak1 = 365 +68 -46 s. This is followed by a further steepening to alpha3 = 1.39 +/- 0.75 at a time tbreak2 = 3.4 +1.2 -1.8 ks.
The spectrum of the photon counting mode data from the first two orbits can be fit with an absorbed power-law to give a photon index gamma = 2.39 +0.30 -0.28 and NH = (7.7 +2.5 -2.2)e21 cm^-2, in addition to the Galactic column of 3.9e+21 cm^-2 in the direction of the GRB. The observed 0.3-10 keV flux is (1.14 +0.10 -0.22)e-11 erg cm^-2 s^-1, which corresponds to an unabsorbed flux of 3.57e-11 erg cm^-2 s^-1.
If the light curve continues to decay at the same rate we estimate the count rate will be 3.2e-2 count/s one day after the trigger, which corresponds to an observed flux of 1.9e-13 erg cm^-2 s^-1.
This circular is an official product of the Swift-XRT team.
GCN Circular #8007
M. Stamatikos (GSFC/ORAU), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), J. Tueller (GSFC), T. 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 080723 (trigger #317662) (Stamatikos, et al., GCN Circ. 8000). The BAT ground-calculated position is RA, Dec = 274.461, -6.910 deg which is
```
    RA(J2000)  =  18h 17m 50.6s
    Dec(J2000) = -06d 54' 34.8"
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The burst was in the fully coded part of the BAT field of view.
The mask-weighted light curve showed a double-peaked structure, with the first peak extending from T-1 sec to T+4 sec, and the second smaller peak from T+6 sec to T+20 sec. T90 (15-350 keV) is 17.3 +- 3.0 sec (estimated error including systematics).
The time-averaged spectrum from T-0.2 to T+18.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.77 +- 0.21. The fluence in the 15-150 keV band is 3.3 +- 0.4 x 10-7 erg/cm2. The 1-sec peak photon flux measured from T-0.13 sec in the 15-150 keV band is 0.9 +- 0.1 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/317662/BA/
GCN Circular #8012
S. T. Holland (CRESST/GSFC/USRA) and M. Stamatikos (NASA/ORAU) report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 080723A starting 68 s after the BAT trigger (Stamatikos et al. 2008, GCN Circ. 8000). We do not find any source, in any of the UVOT observations, at the UVOT-enhanced XRT position of the afterglow (Beardmore 2008, GCN Circ. 8001). The 3-sigma upper limits for detecting a source at this location in the co-added images are:
```
Filter    T_start   T_stop    Exp(s)    Mag (3-sigma upper limit)
-----------------------------------------------------------------
    v          194     6260     1040    >20.1
    b          674     7080      451    >20.6
    u          649     6874      471    >20.4
   uvw1        625     6670      469    >20.3
   uvm2        600     6465      467    >20.1
   uvw2        704     7468      430    >20.4
  white         88     7284      628    >21.4
-----------------------------------------------------------------
```
The quoted upper limits have not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 1.3 mag. All photometry is on the UVOT flight system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #8018
F. Munz (INAF/IASF Bologna), F. Terra (Second University of Roma "Tor Vergata"),,G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), G. Pizzichini (INAF/IASF Bologna), D. Nanni (INAF/OAR and Second University of Rome "Tor Vergata"), S. Galleti, R. Gualandi (Bologna Observatory) report:
We observed the field of GRB 080723A (GCN 8000 Stamatikos et al.) with the 152 cm telescope located in Loiano under clear sky conditions (seeing~2.5").
In our 20 min exposure in the Rc filter at mean time 2008 July 23 20.62 UT we do not detect any afterglow candidate in the enhanced Swift-XRT position (GCN 8001, Beardmore et al.).
Our 3-sigma limiting magnitude is R~20 (based on Nomad1 catalogue). In this area there is a strong galactic extinction, A_lambda ~ 4 mag in R from the NASA/IPAC extragalactic data base. The image has been posted in our public directory from where it can be retrieved by sftp using
```
   hostname: ermione.bo.astro.it
   username: publicGRB
   password: GRB_bo
   directory: GRB080723A
```

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Jochen Greiner, last update: 25-Jul-2008 [Disclaimer]