Gamma-ray Burst 071028

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:42:22 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.847d {+07h 59m 23s} (J2000),
                 119.962d {+07h 59m 51s} (current),
                 119.111d {+07h 56m 27s} (1950)
GRB_DEC:         +21.498d {+21d 29' 52"} (J2000),
                 +21.476d {+21d 28' 34"} (current),
                 +21.635d {+21d 38' 05"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1962 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        14401 TJD;   301 DOY;   07/10/28
GRB_TIME:        63661.67 SOD {17:41:01.67} UT
GRB_PHI:          -4.12 [deg]
GRB_THETA:        11.37 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    8.74 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -1  +0  +0 +12  +1 
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 38"}
SUN_DIST:         97.22 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.29d {+04h 33m 10s}  +27.02d {+27d 00' 60"}
MOON_DIST:        47.12 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.14 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      117.59,  0.87 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 215.85,2.32 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:43:30 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.8192d {+07h 59m 16.6s} (J2000),
                 119.9343d {+07h 59m 44.2s} (current),
                 119.0829d {+07h 56m 19.9s} (1950)
GRB_DEC:         +21.4838d {+21d 29' 01.6"} (J2000),
                 +21.4621d {+21d 27' 43.5"} (current),
                 +21.6207d {+21d 37' 14.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       31 [cnts]
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63779.72 SOD {17:42:59.72} UT,   118.1 [sec] since BAT Trigger Time
CENTROID_X:      336.44,  raw= 336  [pixels]
CENTROID_Y:      266.03,  raw= 266  [pixels]
ROLL:            101.30 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -75.36
GRB_POS_XRT_Z:   80.48
IMAGE_URL:       sw00295527000msxps_rw.img
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 39"}
SUN_DIST:         97.24 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.30d {+04h 33m 13s}  +27.02d {+27d 01' 06"}
MOON_DIST:        47.09 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      117.57,  0.85 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:43:29 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.8192d {+07h 59m 16.6s} (J2000),
                 119.9343d {+07h 59m 44.2s} (current),
                 119.0829d {+07h 56m 19.9s} (1950)
GRB_DEC:         +21.4838d {+21d 29' 01.6"} (J2000),
                 +21.4621d {+21d 27' 43.5"} (current),
                 +21.6207d {+21d 37' 14.4"} (1950)
GRB_ERROR:       5.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       7.24e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.56 [sigma]
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63779.72 SOD {17:42:59.72} UT,   118.1 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.24 261.35 243.42
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 39"}
SUN_DIST:         97.24 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.30d {+04h 33m 13s}  +27.02d {+27d 01' 06"}
MOON_DIST:        47.09 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      117.57,  0.85 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:43:39 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.8192d {+07h 59m 16.6s} (J2000),
                 119.9343d {+07h 59m 44.2s} (current),
                 119.0829d {+07h 56m 19.9s} (1950)
GRB_DEC:         +21.4838d {+21d 29' 01.6"} (J2000),
                 +21.4621d {+21d 27' 43.5"} (current),
                 +21.6207d {+21d 37' 14.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       31 [cnts]
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63779.72 SOD {17:42:59.72} UT,   118.1 [sec] since BAT Trigger Time
CENTROID_X:      336.44,  raw= 336  [pixels]
CENTROID_Y:      266.03,  raw= 266  [pixels]
ROLL:            101.30 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -75.36
GRB_POS_XRT_Z:   80.48
IMAGE_URL:       sw00295527000msxps_rw.img
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 39"}
SUN_DIST:         97.24 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.30d {+04h 33m 13s}  +27.02d {+27d 01' 07"}
MOON_DIST:        47.09 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.12 [deg] galactic lon,lat of the burst
ECL_COORDS:      117.57,  0.85 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:45:02 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.847d {+07h 59m 23s} (J2000),
                 119.962d {+07h 59m 51s} (current),
                 119.111d {+07h 56m 27s} (1950)
GRB_DEC:         +21.498d {+21d 29' 52"} (J2000),
                 +21.476d {+21d 28' 34"} (current),
                 +21.635d {+21d 38' 05"} (1950)
GRB_DATE:        14401 TJD;   301 DOY;   07/10/28
GRB_TIME:        63661.67 SOD {17:41:01.67} UT
TRIGGER_INDEX:   20000
GRB_PHI:          -4.12 [deg]
GRB_THETA:        11.37 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    8.74 [sigma]
LC_URL:          sw00295527000msb.lc
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 40"}
SUN_DIST:         97.22 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.32d {+04h 33m 17s}  +27.02d {+27d 01' 14"}
MOON_DIST:        47.10 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.14 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      117.59,  0.87 [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 an image 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 = 215.85,2.32 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:45:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.848d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.500d {+21d 29' 58"} (J2000)
POINT_ROLL:      101.303d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63789.35 SOD {17:43:09.35} UT,   127.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.224
N_STARS:         41
X_OFFSET:        488 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1447 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00295527000msufc0127.fits
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 41"}
SUN_DIST:         97.22 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.33d {+04h 33m 19s}  +27.02d {+27d 01' 18"}
MOON_DIST:        47.09 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.87 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:46:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.848d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.500d {+21d 29' 58"} (J2000)
POINT_ROLL:      101.303d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63789.35 SOD {17:43:09.35} UT,   127.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.224
N_STARS:         41
X_OFFSET:        488 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1447 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00295527000msufc0127.fits
SUN_POSTN:       212.64d {+14h 10m 34s}  -13.16d {-13d 09' 42"}
SUN_DIST:         97.22 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.34d {+04h 33m 20s}  +27.02d {+27d 01' 21"}
MOON_DIST:        47.08 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.87 [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:     Sun 28 Oct 07 17:48:38 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.848d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.500d {+21d 29' 58"} (J2000)
ROLL:            101.303d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63789.35 SOD {17:43:09.35} UT,   127.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     215286191
X_OFFSET:        737 [pixels]
Y_OFFSET:        1094 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       897
Y_GRB_POS:       1254
BINNING_INDEX:   1
IM_URL:          sw00295527000msuni0127.fits
SUN_POSTN:       212.64d {+14h 10m 35s}  -13.16d {-13d 09' 44"}
SUN_DIST:         97.22 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.36d {+04h 33m 27s}  +27.03d {+27d 01' 33"}
MOON_DIST:        47.06 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.87 [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:     Sun 28 Oct 07 17:49:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.848d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.500d {+21d 29' 58"} (J2000)
ROLL:            101.303d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63789.35 SOD {17:43:09.35} UT,   127.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     215286191
X_OFFSET:        737 [pixels]
Y_OFFSET:        1094 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       897
Y_GRB_POS:       1254
BINNING_INDEX:   1
IM_URL:          sw00295527000msuni0127.fits
SUN_POSTN:       212.64d {+14h 10m 35s}  -13.16d {-13d 09' 44"}
SUN_DIST:         97.23 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.37d {+04h 33m 28s}  +27.03d {+27d 01' 35"}
MOON_DIST:        47.05 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.87 [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:     Sun 28 Oct 07 17:52:45 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.847d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.502d {+21d 30' 06"} (J2000)
POINT_ROLL:      101.302d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63895.29 SOD {17:44:55.29} UT,   233.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.181
N_STARS:         61
X_OFFSET:        417 [pixels]
Y_OFFSET:        774 [pixels]
X_MAX:           1376 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00295527000msufc0233.fits
SUN_POSTN:       212.65d {+14h 10m 35s}  -13.16d {-13d 09' 47"}
SUN_DIST:         97.23 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.41d {+04h 33m 38s}  +27.03d {+27d 01' 54"}
MOON_DIST:        47.01 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.88 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 28 Oct 07 17:53:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.847d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.502d {+21d 30' 06"} (J2000)
POINT_ROLL:      101.302d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63895.29 SOD {17:44:55.29} UT,   233.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        4.181
N_STARS:         61
X_OFFSET:        417 [pixels]
Y_OFFSET:        774 [pixels]
X_MAX:           1376 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00295527000msufc0233.fits
SUN_POSTN:       212.65d {+14h 10m 35s}  -13.16d {-13d 09' 47"}
SUN_DIST:         97.23 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.41d {+04h 33m 39s}  +27.03d {+27d 01' 56"}
MOON_DIST:        47.01 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.88 [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:     Sun 28 Oct 07 17:54:37 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.847d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.502d {+21d 30' 06"} (J2000)
ROLL:            101.302d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63895.29 SOD {17:44:55.29} UT,   233.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     215286297
X_OFFSET:        737 [pixels]
Y_OFFSET:        1094 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       897
Y_GRB_POS:       1254
BINNING_INDEX:   1
IM_URL:          sw00295527000msuni0233.fits
SUN_POSTN:       212.65d {+14h 10m 36s}  -13.16d {-13d 09' 49"}
SUN_DIST:         97.23 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.43d {+04h 33m 43s}  +27.03d {+27d 02' 04"}
MOON_DIST:        46.99 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.88 [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:     Sun 28 Oct 07 17:54:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     295527,   Seg_Num: 0
POINT_RA:        119.847d {+07h 59m 23s} (J2000)
POINT_DEC:       +21.502d {+21d 30' 06"} (J2000)
ROLL:            101.302d
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63895.29 SOD {17:44:55.29} UT,   233.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     215286297
X_OFFSET:        737 [pixels]
Y_OFFSET:        1094 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       897
Y_GRB_POS:       1254
BINNING_INDEX:   1
IM_URL:          sw00295527000msuni0233.fits
SUN_POSTN:       212.65d {+14h 10m 36s}  -13.16d {-13d 09' 49"}
SUN_DIST:         97.23 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.43d {+04h 33m 44s}  +27.04d {+27d 02' 06"}
MOON_DIST:        46.99 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      117.59,  0.88 [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:     Sun 28 Oct 07 17:59:05 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     295527,   Seg_Num: 0
GRB_RA:          119.8177d {+07h 59m 16.2s} (J2000),
                 119.9328d {+07h 59m 43.8s} (current),
                 119.0814d {+07h 56m 19.5s} (1950)
GRB_DEC:         +21.4841d {+21d 29' 02.7"} (J2000),
                 +21.4624d {+21d 27' 44.6"} (current),
                 +21.6210d {+21d 37' 15.5"} (1950)
GRB_ERROR:       4.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14401 TJD;   301 DOY;   07/10/28
IMG_START_TIME:  63850.00 SOD {17:44:10.00} UT,   188.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       212.65d {+14h 10m 36s}  -13.16d {-13d 09' 52"}
SUN_DIST:         97.26 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:       68.48d {+04h 33m 56s}  +27.04d {+27d 02' 28"}
MOON_DIST:        46.93 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      200.13, 24.11 [deg] galactic lon,lat of the burst
ECL_COORDS:      117.56,  0.85 [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.php for details.

GCN Circular #7012
J. L. Racusin (PSU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU), M. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team:
At 17:41:01 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071028 (trigger=295527). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 119.847, +21.498 which is
```
   RA(J2000)  =  07h 59m 23s
   Dec(J2000) = +21d 29' 52"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Even though this is an image trigger, there is an indication of activity from about T+20 sec to T+50 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~25 sec after the trigger.
The XRT began observing the field at 17:42:59 UT, 118 seconds after the BAT trigger. Using prompt downlinked data, we find a bright, variable, uncatalogued X-ray source located at RA, Dec 119.8176, 21.4841 which is
```
   RA(J2000)  = 07 59 16.22
   Dec(J2000) = +21 29 02.8
```
with an uncertainty of 4.1 arcsec (radius, 90% containment). This location is 106 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 7.2e-10 erg/cm2/s (0.2-10 keV).
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 128 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. There is a bright (12th mag) star in the XRT error circle which severely limits our ability to detect a possible afterglow. No correction has been made for extinction.
Burst Advocate for this burst is J. L. Racusin (racusin AT astro.psu.edu). 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 #7013
J. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), J. L. Racusin (PSU), T. Sakamoto (GSFC/UMBC), 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-239 to T+541 sec from the recent telemetry downlink, we report further analysis of BAT GRB 071028 (trigger #295527) (Racusin, et al., GCN Circ. 7012). The BAT ground-calculated position is RA, Dec = 119.828, 21.473 deg, which is
```
   RA(J2000)  = 07h 59m 18.6s 
   Dec(J2000) = 21d 28' 22" 
```
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a single FRED-like peak starting at ~T_zero, peaking at ~T+35 sec, and ending at ~T+110 sec. T90 (15-350 keV) is 27.0 +- 1.0 sec (estimated error including systematics).
The time-averaged spectrum from T+19.2 to T+48.9 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.87 +- 0.26. The fluence in the 15-150 keV band is 3.0 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+41.75 sec in the 15-150 keV band is 0.3 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #7014
J. Racusin (PSU) reports on behalf of the Swift-XRT Team:
We have analysed the first 2 orbits of Swift-XRT data obtained for GRB 071028 (Racusin et al. GCN Circ. 7012), totaling 61 s of Windowed Timing (WT) data and 2.9 ks of Photon Counting (PC) data.
Using 399 s of overlapping XRT Photon Counting mode and UVOT V-band data, 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 = 119.81936, 21.48482 which is equivalent to:
```
RA (J2000):  07 59 16.65
Dec (J2000): +21 29 05.4
```
with an uncertainty of 1.9 arcsec (radius, 90% confidence). This is 6.5 arcsec from the previous XRT position (GCN Circ. 7012), and 51 arcsec from the refined BAT position (Cummings et al., GCN Circ. 7013).
The bright X-ray light-curve can be fit by a broken power-law, with an initial steep decay index of 3.3 +/- 0.4 followed by a flatter decay index of 1.1 +/- 0.3 after a break at 475 +/- 150 seconds.
The WT data (124-182 seconds) can be modeled as an absorbed power-law, with photon index of 1.9 +/- 0.2 and a total absorbing column of NH = (5.9 +/- 5.6)e20 cm^-2, consistent with the Galactic value of 5.1e20 cm^-2. The 0.3-10 keV observed (unabsorbed) flux during this time is 3.1e-10 (3.6e-10) erg cm^-2 s^-1.
Assuming the source continues to decay with the same decay index of 1.1, we predict an XRT count rate of 5.5e-4 counts/s at T+24 hours, which corresponds to an 0.3-10.0 keV observed flux of 2.3e-14 ergs cm^-2 s^-1.
This circular is an official product of the Swift-XRT team.
GCN Circular #7015
L.P. Xin, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng, J. Wang and W.K. Zheng on behalf of EAFON report:
We have imaged the field of GRB071028 (J. L. Racusin, GCN7012 ; J. Cummings, GCN7013; J. Racusin, GCN7014) with EST 1m telescope at Xinglong Observatory. The observations were started from 17:57:16 UT, 16.25min after the burst. A series of V-band images were obtained . No new source was found in our combined images within the error region of the XRT (J. L. Racusin, GCN7012) but We found the location reported by J. Racusin(GCN7014) was consisting with a very bright star in USNO-B1.0.
The 3 sigma limit of our V-band combined images derived from USNO-B1.0 R2mag were :
```
------------------------------------
Band     Mid time     Exp time  Limit Mag
V        30min        19*60       19.8
V        1.19hours      9*300s     19.98
V        2.98hours     14*600s     20.09            
```
This message may be cited
GCN Circular #7016
P. Schady (MSSL/UCL) and J.L. Racusin (PSU) report on behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 071028 (GCN 7012; Racusin et al.) beginning 128 seconds after the BAT trigger. No afterglow is detected in any of the UVOT filters within the XRT error circle (Racusin et al., GCN 7014). As already noted by Xin et al. (GCN 7015), the refined XRT position (Racusin et al., GCN 7014) lies next to a very bright star (V<10 mag), severely limiting the detection of an optical afterglow.
In the case of the white band and optical filters (v,b,u), contamination from the nearby, bright star is causing the exposures to be affected by coincidence loss to a degree that is outside the photometrically calibrated range of UVOT. This limits the depth of our observations at the XRT position in these filters to white > 13.86, v > 11.46, b > 12.68 and u > 11.91.
The 3-sigma upper limits at the XRT position in co-added UV exposures are as follows:
```
Filter   Tmid  Exp   Magnitude
          (s)   (s)   (3-sigma UL)
uvw1     5044  412    > 19.89
uvm2     4847  413    > 20.32
uvw2     5014  213    > 19.67
```
where Tmid is the mid time of the observations. The values quoted above are not corrected for the expected Galactic extinction corresponding to a reddening of E_{B-V} = 0.06 mag in the direction of the burst (Schlegel et al. 1998).
GCN Report 98.1
GCN_Report 98.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_98_1.pdf by J. Racusin at PSU titled: "Swift Observations of GRB 071028"
GCN Circular #7017
Adria C. Updike, Dieter H. Hartmann (Clemson University) and Gary D. Henson (ETSU) report on behalf of the Clemson GRB Follow-Up Team:
We observed the field of GRB 071028 (GCN 7012, Racusin et al.) with the 0.9m SARA telescope on Kitt Peak beginning 15 hours and 25 minutes after the trigger. Under variable cloud cover, we detect an apparently fading source within the BAT circle, but outside the revised XRT position (GCN 7014, Racusin et al.), at RA=07:59:15.22, Dec=+21:28:32.052 (+/- 2 arcsec, J2000). This candidate source is approximately 0.5 arcmin to the SW of the revised XRT position. In an hour of exposures, the source faded from R ~ 17 to beyond our detection limit (R limit ~ 18.5 in a single 120s exposure). The source was calibrated relative to 10 field stars in the USNO B1.0 catalog. The separation between the candidate OT and the revised XRT position makes this very unlikely to be the afterglow of GRB 071028. Second epoch observations may be required to establish the nature of this source.
The SARA website can be found at http://astro.fit.edu/sara/sara.html
This message may be cited.
GCN Report 98.2
GCN_Report 98.2 has been posted: http://gcn.gsfc.nasa.gov/reports/report_98_2.pdf by J. Racusin at PSU titled: "Final Swift Observations of GRB 071028A"

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Jochen Greiner, last update: 08-Nov-2007 [Disclaimer]