Gamma-ray Burst 080303

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:10:50 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.073d {+07h 28m 18s} (J2000),
                 112.061d {+07h 28m 15s} (current),
                 112.149d {+07h 28m 36s} (1950)
GRB_DEC:         -70.240d {-70d 14' 23"} (J2000),
                 -70.257d {-70d 15' 25"} (current),
                 -70.135d {-70d 08' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2305 [cnts]    Image_Peak=133 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       27414 [cnts]
BKG_TIME:        33021.38 SOD {09:10:21.38} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14528 TJD;    63 DOY;   08/03/03
GRB_TIME:        33035.27 SOD {09:10:35.27} UT
GRB_PHI:         -10.75 [deg]
GRB_THETA:        30.72 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.68 [sigma]
IMAGE_SIGNIF:    7.67 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +5  +0  +0  +9  +1 
SUN_POSTN:       344.48d {+22h 57m 56s}   -6.61d {-06d 36' 52"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.94d {+19h 27m 44s}  -25.21d {-25d 12' 45"}
MOON_DIST:        84.53 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      214.37,-81.15 [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 = 183.41,-19.58 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:12:18 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.0590d {+07h 28m 14.1s} (J2000),
                 112.0463d {+07h 28m 11.1s} (current),
                 112.1342d {+07h 28m 32.2s} (1950)
GRB_DEC:         -70.2337d {-70d 14' 01.3"} (J2000),
                 -70.2508d {-70d 15' 02.7"} (current),
                 -70.1290d {-70d 07' 44.2"} (1950)
GRB_ERROR:       6.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       4.53e-10 [erg/cm2/sec]
GRB_SIGNIF:      4.58 [sigma]
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33107.68 SOD {09:11:47.68} UT,   72.4 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.24 261.31 243.46
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       344.48d {+22h 57m 56s}   -6.61d {-06d 36' 50"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.95d {+19h 27m 48s}  -25.21d {-25d 12' 34"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.40 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.34,-81.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:12:28 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.0590d {+07h 28m 14.1s} (J2000),
                 112.0463d {+07h 28m 11.1s} (current),
                 112.1342d {+07h 28m 32.2s} (1950)
GRB_DEC:         -70.2337d {-70d 14' 01.3"} (J2000),
                 -70.2508d {-70d 15' 02.7"} (current),
                 -70.1290d {-70d 07' 44.2"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       21 [cnts]
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33107.68 SOD {09:11:47.68} UT,   72.4 [sec] since BAT Trigger Time
CENTROID_X:      301.35,  raw= 301  [pixels]
CENTROID_Y:      288.61,  raw= 289  [pixels]
ROLL:            232.27 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -22.13
GRB_POS_XRT_Z:   -2.23
IMAGE_URL:       sw00304549000msxps_rw.img
SUN_POSTN:       344.48d {+22h 57m 56s}   -6.61d {-06d 36' 50"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.95d {+19h 27m 48s}  -25.21d {-25d 12' 33"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.40 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.34,-81.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:12:33 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.0590d {+07h 28m 14.1s} (J2000),
                 112.0463d {+07h 28m 11.1s} (current),
                 112.1342d {+07h 28m 32.2s} (1950)
GRB_DEC:         -70.2337d {-70d 14' 01.3"} (J2000),
                 -70.2508d {-70d 15' 02.7"} (current),
                 -70.1290d {-70d 07' 44.2"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       21 [cnts]
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33107.68 SOD {09:11:47.68} UT,   72.4 [sec] since BAT Trigger Time
CENTROID_X:      301.35,  raw= 301  [pixels]
CENTROID_Y:      288.61,  raw= 289  [pixels]
ROLL:            232.27 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -22.13
GRB_POS_XRT_Z:   -2.23
IMAGE_URL:       sw00304549000msxps_rw.img
SUN_POSTN:       344.48d {+22h 57m 56s}   -6.61d {-06d 36' 50"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.95d {+19h 27m 48s}  -25.21d {-25d 12' 33"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.40 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.34,-81.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:14:01 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.070d {+07h 28m 17s} (J2000)
POINT_DEC:       -70.237d {-70d 14' 13"} (J2000)
POINT_ROLL:      232.273d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33115.11 SOD {09:11:55.11} UT,   79.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.268
N_STARS:         120
X_OFFSET:        488 [pixels]
Y_OFFSET:        552 [pixels]
X_MAX:           1447 [pixels]
Y_MAX:           1511 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00304549000msufc0079.fits
SUN_POSTN:       344.49d {+22h 57m 57s}   -6.61d {-06d 36' 48"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.97d {+19h 27m 52s}  -25.21d {-25d 12' 23"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.36,-81.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:14:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.070d {+07h 28m 17s} (J2000)
POINT_DEC:       -70.237d {-70d 14' 13"} (J2000)
POINT_ROLL:      232.273d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33115.11 SOD {09:11:55.11} UT,   79.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.268
N_STARS:         120
X_OFFSET:        488 [pixels]
Y_OFFSET:        552 [pixels]
X_MAX:           1447 [pixels]
Y_MAX:           1511 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00304549000msufc0079.fits
SUN_POSTN:       344.49d {+22h 57m 57s}   -6.61d {-06d 36' 48"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.97d {+19h 27m 53s}  -25.21d {-25d 12' 18"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.36,-81.15 [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:     Mon 03 Mar 08 09:15:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.070d {+07h 28m 17s} (J2000)
POINT_DEC:       -70.237d {-70d 14' 13"} (J2000)
ROLL:            232.273d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33115.11 SOD {09:11:55.11} UT,   79.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     226228317
X_OFFSET:        832 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       992
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0079.fits
SUN_POSTN:       344.49d {+22h 57m 57s}   -6.61d {-06d 36' 47"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.98d {+19h 27m 55s}  -25.20d {-25d 12' 13"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.36,-81.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:15:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.070d {+07h 28m 17s} (J2000)
POINT_DEC:       -70.237d {-70d 14' 13"} (J2000)
ROLL:            232.273d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33115.11 SOD {09:11:55.11} UT,   79.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     226228317
X_OFFSET:        832 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       992
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0079.fits
SUN_POSTN:       344.49d {+22h 57m 57s}   -6.61d {-06d 36' 47"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.98d {+19h 27m 56s}  -25.20d {-25d 12' 10"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.36,-81.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        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:     Mon 03 Mar 08 09:15:42 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.073d {+07h 28m 18s} (J2000),
                 112.061d {+07h 28m 15s} (current),
                 112.149d {+07h 28m 36s} (1950)
GRB_DEC:         -70.240d {-70d 14' 23"} (J2000),
                 -70.257d {-70d 15' 25"} (current),
                 -70.135d {-70d 08' 06"} (1950)
GRB_DATE:        14528 TJD;    63 DOY;   08/03/03
GRB_TIME:        33035.27 SOD {09:10:35.27} UT
TRIGGER_INDEX:   124
GRB_PHI:         -10.75 [deg]
GRB_THETA:        30.72 [deg]
DELTA_TIME:      52.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.68 [sigma]
IMAGE_SIGNIF:    7.67 [sigma]
LC_URL:          sw00304549000msb.lc
SUN_POSTN:       344.49d {+22h 57m 57s}   -6.61d {-06d 36' 47"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      291.98d {+19h 27m 55s}  -25.20d {-25d 12' 11"}
MOON_DIST:        84.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      214.37,-81.15 [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 = 183.41,-19.58 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:23:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 22"} (J2000)
POINT_ROLL:      232.265d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33221.13 SOD {09:13:41.13} UT,   185.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.185
N_STARS:         168
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00304549000msufc0185.fits
SUN_POSTN:       344.49d {+22h 57m 58s}   -6.61d {-06d 36' 40"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.05d {+19h 28m 13s}  -25.19d {-25d 11' 18"}
MOON_DIST:        84.55 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:23:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 22"} (J2000)
POINT_ROLL:      232.265d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33221.13 SOD {09:13:41.13} UT,   185.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.185
N_STARS:         168
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00304549000msufc0185.fits
SUN_POSTN:       344.49d {+22h 57m 58s}   -6.61d {-06d 36' 39"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.06d {+19h 28m 14s}  -25.19d {-25d 11' 15"}
MOON_DIST:        84.56 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:24:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 22"} (J2000)
ROLL:            232.265d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33221.13 SOD {09:13:41.13} UT,   185.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     226228423
X_OFFSET:        832 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       992
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0185.fits
SUN_POSTN:       344.49d {+22h 57m 58s}   -6.61d {-06d 36' 38"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.06d {+19h 28m 15s}  -25.19d {-25d 11' 10"}
MOON_DIST:        84.56 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:24:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 22"} (J2000)
ROLL:            232.265d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33221.13 SOD {09:13:41.13} UT,   185.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     226228423
X_OFFSET:        832 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       992
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0185.fits
SUN_POSTN:       344.49d {+22h 57m 58s}   -6.61d {-06d 36' 38"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.07d {+19h 28m 16s}  -25.19d {-25d 11' 08"}
MOON_DIST:        84.56 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        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:     Mon 03 Mar 08 09:28:31 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
POINT_ROLL:      232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33913.85 SOD {09:25:13.85} UT,   878.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.289
N_STARS:         113
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00304549000msufc0878.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 35"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.10d {+19h 28m 24s}  -25.18d {-25d 10' 42"}
MOON_DIST:        84.56 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:29:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
POINT_ROLL:      232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33913.85 SOD {09:25:13.85} UT,   878.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.289
N_STARS:         113
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00304549000msufc0878.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 34"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.11d {+19h 28m 26s}  -25.18d {-25d 10' 38"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:29:29 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.0582d {+07h 28m 13.9s} (J2000),
                 112.0455d {+07h 28m 10.9s} (current),
                 112.1335d {+07h 28m 32.0s} (1950)
GRB_DEC:         -70.2344d {-70d 14' 03.8"} (J2000),
                 -70.2515d {-70d 15' 05.3"} (current),
                 -70.1297d {-70d 07' 46.8"} (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:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33235.00 SOD {09:13:55.00} UT,   199.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 34"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.11d {+19h 28m 27s}  -25.18d {-25d 10' 35"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.40 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.35,-81.15 [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

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:29:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
ROLL:            232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33913.85 SOD {09:25:13.85} UT,   878.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     226229116
X_OFFSET:        831 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0878.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 33"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.11d {+19h 28m 28s}  -25.18d {-25d 10' 32"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:30:19 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.076d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
ROLL:            232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33913.85 SOD {09:25:13.85} UT,   878.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     226229116
X_OFFSET:        831 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0878.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 33"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.12d {+19h 28m 29s}  -25.18d {-25d 10' 29"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:31:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.077d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
POINT_ROLL:      232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  34020.46 SOD {09:27:00.46} UT,   985.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.322
N_STARS:         71
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00304549000msufc0985.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 32"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.13d {+19h 28m 31s}  -25.17d {-25d 10' 23"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 03 Mar 08 09:31:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.077d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
POINT_ROLL:      232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  34020.46 SOD {09:27:00.46} UT,   985.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.322
N_STARS:         71
X_OFFSET:        512 [pixels]
Y_OFFSET:        603 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1562 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00304549000msufc0985.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 31"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.13d {+19h 28m 32s}  -25.17d {-25d 10' 19"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:32:20 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.077d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
ROLL:            232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  34020.46 SOD {09:27:00.46} UT,   985.2 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     226229223
X_OFFSET:        831 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0985.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 31"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.14d {+19h 28m 33s}  -25.17d {-25d 10' 15"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:32:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     304549,   Seg_Num: 0
POINT_RA:        112.077d {+07h 28m 18s} (J2000)
POINT_DEC:       -70.240d {-70d 14' 21"} (J2000)
ROLL:            232.266d
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  34020.46 SOD {09:27:00.46} UT,   985.2 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     226229223
X_OFFSET:        831 [pixels]
Y_OFFSET:        922 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       1082
BINNING_INDEX:   1
IM_URL:          sw00304549000msuni0985.fits
SUN_POSTN:       344.50d {+22h 57m 59s}   -6.61d {-06d 36' 31"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.14d {+19h 28m 34s}  -25.17d {-25d 10' 13"}
MOON_DIST:        84.57 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.37,-81.14 [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:     Mon 03 Mar 08 09:35:11 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     304549,   Seg_Num: 0
GRB_RA:          112.0588d {+07h 28m 14.11s} (J2000),
                 112.0461d {+07h 28m 11.06s} (current),
                 112.1340d {+07h 28m 32.17s} (1950)
GRB_DEC:         -70.2338d {-70d 14' 01.6"} (J2000),
                 -70.2509d {-70d 15' 03.1"} (current),
                 -70.1291d {-70d 07' 44.6"} (1950)
GRB_ERROR:       0.4 [arcsec radius, statistical only]
GRB_MAG:         18.39 +/- 0.50 [mag]
FILTER:          10, White
IMG_START_DATE:  14528 TJD;    63 DOY;   08/03/03
IMG_START_TIME:  33116.00 SOD {09:11:56.00} UT,   80.7 [sec] since BAT Trigger Time
SUN_POSTN:       344.50d {+22h 57m 60s}   -6.61d {-06d 36' 28"}
SUN_DIST:         95.52 [deg]   Sun_angle= -8.5 [hr] (East of Sun)
MOON_POSTN:      292.16d {+19h 28m 40s}  -25.17d {-25d 09' 55"}
MOON_DIST:        84.58 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      281.77,-22.40 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      214.34,-81.15 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN Circular #7349
B. E. Schaefer (Louisiana State) and W. Rujopakarn (Steward), report on behalf of the ROTSE collaboration:
ROTSE-IIIa, located at Siding Spring Observatory, Australia, responded to GRB 080303A (Swift trigger 304549), producing images beginning 8.4 s after the GCN notice time. An automated response took the first image at 09:10:55.3 UT, 20.0 s after the burst, and during the gamma-ray emission, under twilight conditions. We took 10 5-sec, 10 20-sec and 10 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle, for both single images and coadding into sets of 10; the field is not crowded. Individual images have limiting magnitudes ranging from 13.3-15.8, with the poor limits at the start due to the bright twilight that was rapidly fading. We set the following specific limits.
```
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
09:10:55.4   09:11:00.4         5     13.3           20.1       N
09:10:55.4   09:13:06.9       131     14.1           20.1       Y
09:21:35.1   09:29:30.1       475     16.2          659.8       Y
```
GCN Circular #7350
P. D'Avanzo, D. Fugazza, L.A. Antonelli, S. Covino, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F. D'Alessio, F. Fiore, 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 GRB 080303 on March 03 09:13:30 UT (about 180 seconds after the burst).
We detect an afterglow candidate inside the XRT error box down at the following coordinates (J2000):
```
R.A.= 07:28:13.91
Dec.: -70:14:00.3
```
with an uncertainty of 0.4". The object has H~15.9.
Further analysis is in progress.
GCN Circular #7351
T. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), E. A. Hoversten (PSU), N. P. M. Kuin (MSSL), J. Mao (INAF-OAB), A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester), S. R. Oates (UCL-MSSL), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), D. Perez (U Leicester), P. Romano (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), G. Stratta (ASDC), G. Tagliaferri (INAF-OAB), E. Troja (U Leicester/INAF-IASFPa) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:
At 09:10:35 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080303 (trigger=304549). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 112.073, -70.240 which is
```
   RA(J2000) = 07h 28m 18s
   Dec(J2000) = -70d 14' 23"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a FRED-like structure with a duration of about 30 sec. The peak count rate was ~2600 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 09:11:47.7 UT, 72.4 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 112.05892, -70.23448 which is equivalent to:
```
   RA(J2000)  = 07h 28m 14.14s
   Dec(J2000) = -70d 14' 04.1"
```
with an uncertainty of 2.6 arcseconds (radius, 90% containment). This location is 26 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 consistent with the Galactic value of 1.26e+21 cm^-2 (Kalberla et al. 2005), so we cannot constrain the redshift at this time using the relation from Grupe et al. (2007). A summary of the promptly downlinked data is given at http://www.swift.ac.uk/sper/304549/ .
The initial flux in the 2.5 s image was 4.53e-10 erg cm^-2 s^-2 (0.2-10 keV).
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 80 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
    RA(J2000) =	07:28:14.14 = 112.0589  
    DEC(J2000) = -70:14:01.7 = -70.2338 
```
with a 1-sigma error radius of about 0.6 arc sec. This position is 2.4 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.4 with a 1-sigma error of about 0.5 mag. A 400s V band image was taken beginning 186 s after the burst. The estimated magnitude is 18.3 with a 1 sigma error of 0.5 magnitudes. At 986 s after the burst the source is undetected in a 108 s V band exposure. The typical limiting magnitude is 18.0 magnitudes in an exposure of this length. No correction has been made for the expected extinction corresponding to E(B-V) of 0.19.
Burst Advocate for this burst is T. Sakamoto (Taka.Sakamoto 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 #7352
A.C. Gilmore and P.M. Kilmartin (University of Canterbury's Mt John Observatory report:
We observed a fading source inside the XRT error box at coordinates (2000.0)
```
R.A. = 07:28:14.10
Dec.: -70:14:01.4
```
Uncertainty ~0.5" in poor seeing.
Unfiltered R magnitudes from comparison with USNO A2.0 stars
```
 U.T.   R
09:28  18.1
09:40  18.5
09:48  19.0
10:02  19.2
10:13  19.4
10:28  19.9 
```
Observations with Mt John's 1.0-metre f/8 McLellan reflector.
This message may be cited.
GCN Circular #7353
A. Gomboc (U. Ljubljana), R.J. Smith, D.F. Bersier, S. Kobayashi, A. Melandri, A. Monfardini, C.G. Mundell, I.A. Steele (Liverpool JMU), C. Guidorzi (U. Bicocca & INAF-OAB), P. O'Brien, E. Rol, N. Bannister (Leicester) report:
The 2-m Faulkes Telescope South (Siding Spring) robotically followed up GRB 080303A (SWIFT trigger 304549) starting 3.3 min after the GRB trigger time. We detect an optical afterglow candidate in R, B, and i' filters at the position consistent with the UVOT (Sakamoto et al, GCN 7351), REM (D'Avanzo et al., GCN 7350) and Mt. John (Gilmore & Kilmartin, GCN 7352) optical afterglow candidate.
The magnitude of the source was R~17.4+-0.3 and 19.7+-0.3 at 8 min and 50 min after the trigger time, respectively.
GCN Circular #7356
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1194 s of overlapping XRT Photon Counting mode and UVOT data for GRB 080303, 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 = 112.05899, -70.23431 which is equivalent to:
```
RA (J2000): 07h 28m 14.16s
Dec (J2000): -70d 14' 03.5"
```
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).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #7357
GRB080303: Swift XRT refined analysis
J. Mao (INAF-OAB), A. Moretti (INAF-OAB), T. Sakamoto (NASA/UMBC), C. Guidorzi (Univ. Bicocca & INAF-OAB) report on behalf of the Swift-XRT=20 team:
We have analysed the Swift-XRT data obtained for BAT GRB 080303 (trigger #304549, Sakamoto, et al., GCN Circ. 7351). The data consist of 105 s in Windowed Timing (WT) mode, starting 80 s after the BAT trigger and 206 s in Photon Counting (PC) mode. The UVOT-enhanced XRT position was given in Evans et al. (GCN Circ. 7356).
The light-curve shows a simple power-law with a slope of alpha=3D1.65 =B1= 0.05.
The spectrum formed from all the WT data can be modeled with a power-law=20 of photon index Gamma =3D 1.88 =B1 0.12, with an absorbing column of NH =3D (1.32 =B1 0.0= 3)e21=20 cm^-2 (in excess with respect to the Galactic value of 8.97e20 cm^-2). The spectrum=20 formed from the PC data can be modeled with a power-law of photon index Gamma =3D 1.81 =B1 0.17,=20 with an absorbing column of NH =3D (5.72 =B1 4.77)e20 cm^-2.
If the light-curve continues to decay with a slope of 1.65, the=20 afterglow at 24 hour will be with an expected count rate of 1.5e-4 count s^-1. This corresponds to an=20 observed (unabsorbed) flux of 7E-15(9e-15) erg cm-2 s-1.
This circular is an official product of the Swift-XRT team.
GCN Circular #7358
M. Schubel, T. Brennan, D. Reichart, M. Nysewander, A. LaCluyze, K. Ivarsen, J. A. Crain, A. Foster, J. Haislip, J. Styblova, and A. Trotter report:
Skynet observed the localization of GRB 080303 (Sakamoto et al., GCN 7351) with two of the 16" PROMPT telescopes at CTIO beginning 45 seconds after the burst (30 seconds after notification) in VRI.
We detect the afterglow (D'Avanzo et al., GCN 7350) in R and I. At 182 seconds after the burst we measure I ~ 16.2 mag, and at 242 seconds we measure R ~ 17.0 mag (calibrated to 5 USNO B1 stars).
GCN Circular #7359
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), 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), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080303 (trigger #304549) (Sakamoto, et al., GCN Circ. 7351). The BAT ground-calculated position is RA, Dec = 112.019, -70.231 deg which is
```
   RA(J2000)  = 7h 28m 4.6s 
   Dec(J2000) = -70d 13' 53" 
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 80%.
The mask-weighted light curve shows a FRED-like peak T-1 sec, peaking at T+0.5 sec, and ending at T+20 sec. There is also an extended emission until T+~90 sec. T90 (15-350 keV) is 67 +- 20 sec (estimated error including systematics).
The time-averaged spectrum from T-0.2 to T+73.2 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.54 +- 0.25. The fluence in the 15-150 keV band is 6.6 +- 1.0 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.06 sec in the 15-150 keV band is 1.4 +- 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/304549/BA/

GCN Circular #7360
A.A. Breeevld (MSSL/UCL) and T. Sakamoto (GSFC/UMBC) report on behalf of the Swift UVOT team:
The Swift/UVOT observed the burst GRB080303 (Sakamoto et al. GCN circ 7351) starting with the finding chart exposure in white, 81s after the BAT trigger. The afterglow is detected at the enhanced XRT position (Evans et al. GCN circ 7356) in all filters except uvm2. In white it is detectable until at least 6600s after the trigger. The brightness increases until about 700s after the burst, then fades with an estimated temporal slope in the v filter of alpha= 0.9
The initial UVOT magnitudes (in the UVOT photometric system; Breeveld et al. GCN circ 6614) and 3 sigma upper limts from single exposures are as follows:

Filter	   Tstart(s)    Tstop(s)    Exp(s)   Mag      error(mags)
white    81            180             99.8      18.48    0.08
              682           691             9.8        18.19    0.19
              836           845             9.8        18.46    0.24
              880           979             99.8      18.88    0.11
             5195          5394          199.8    20.79    0.38
             6632           6831         199.8    20.72    0.35
v         187             586             399.8    18.03   0.08
             722             741            19.8       17.74   0.3
             987            1095           108.1    19.06    0.3
             5607          5806           199.8    19.76   0.38
b           667           676               9.8       18.59   0.36
               821           830              9.7         >18.74  (UL)
             4991          5190           199.8      >20.86  (UL)
             6427          6626           199.8     20.26   0.27
u           642             661             19.8     18.23    0.32
               797           816              19.8     17.99    0.26
             4785          4984            199.8    19.4     0.22
             6221          6420            199.8    20.33    0.41
uvw1    618            637             19.8        >18.1  (UL)
               771            790             19.7      17.83    0.38
              4581          4780            199.8   19.84    0.43
              6016          6215             199.8      >20.18 (UL)
uvm2    593            612               19.8        >17.58 (UL)
               746            765               19.8         >17.61 (UL)
               4375          4574            199.8       > 19.69 (UL)
                5811         6010            199.8      >19.76  (UL)
uvw2     698              717             19.8       >18.01 (UL)
                 851            870              19.8       17.82   0.37
               5401          5600            199.7       19.76 0.33
               6838          6875              37.6        >18.7  (UL)

The values quoted above are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=0.192 mag in the direction of the burst (Schlegel et al. 1998).

GCN Report 133.1
GCN_Report 133.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_133_1.pdf by T. Sakamoto at CRESST/UMBC/GSFC titled: "Final Swift observations on GRB 080303"
GCN Circular #8440
Aquib Moin (Curtin Institute of Radio Astronomy / Australia Telescope National Facility), Steven Tingay (Curtin Institute of Radio Astronomy), Chris Phillips (Australia Telescope National Facility), Gregory Taylor (University of New Mexico), Mark Wieringa (Australia Telescope National Facility) and Ralph Martin (Perth Observatory) report:
We observed the BAT refined position of the GRB 080303 (GCN 7359) at 4.8 and 8.456 GHz with the Australia Telescope Compact Array (ATCA) on May 31, 2008 between 04:09:05 UT and 14:19:35 UT.
We did not detect a radio source at the BAT position of the GRB 080303 (GCN 7359). The radio flux density at the GRB position is -0.384 +/- 0.303 mJy at 4.8 GHz, and 0.078 +/- 0.250 mJy at 8.6 GHz (1-sigma).
The Australia Telescope Compact Array (/ Parkes telescope / Mopra telescope / Long Baseline Array) is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.
See field image at:
http://astronomy.ivec.org/dokuwiki/doku.php/grb/grb_080303_field_image

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Jochen Greiner, last update: 29-Oct-2008 [Disclaimer]