Gamma-ray Burst 060510B

(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:     Wed 10 May 06 08:23:31 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     209352,   Seg_Num: 0
GRB_RA:          239.141d {+15h 56m 34s} (J2000),
                 239.073d {+15h 56m 18s} (current),
                 239.693d {+15h 58m 46s} (1950)
GRB_DEC:         +78.559d {+78d 33' 33"} (J2000),
                 +78.541d {+78d 32' 28"} (current),
                 +78.701d {+78d 42' 03"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=2188 [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:        13865 TJD;   130 DOY;   06/05/10
GRB_TIME:        30134.81 SOD {08:22:14.81} UT
GRB_PHI:         -112.39 [deg]
GRB_THETA:        11.97 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.54 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 -11  +1 
SUN_POSTN:        47.10d {+03h 08m 24s}  +17.62d {+17d 37' 08"}
SUN_DIST:         83.60 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.06d {+12h 56m 14s}   -7.08d {-07d 04' 36"}
MOON_DIST:        88.93 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      113.53, 75.24 [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 = 212.25,13.74 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:25:38 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     209352,   Seg_Num: 0
GRB_RA:          239.1223d {+15h 56m 29.3s} (J2000),
                 239.0537d {+15h 56m 12.8s} (current),
                 239.6745d {+15h 58m 41.8s} (1950)
GRB_DEC:         +78.5693d {+78d 34' 09.4"} (J2000),
                 +78.5511d {+78d 33' 04.0"} (current),
                 +78.7110d {+78d 42' 39.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       167 [cnts]
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30253.62 SOD {08:24:13.62} UT,   118.8 [sec] since BAT Trigger Time
CENTROID_X:      275.38,  raw= 275  [pixels]
CENTROID_Y:      294.97,  raw= 295  [pixels]
ROLL:            11.50 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -9.02
GRB_POS_XRT_Z:   -61.09
IMAGE_URL:       sw00209352000msxps_rw.img
SUN_POSTN:        47.10d {+03h 08m 24s}  +17.62d {+17d 37' 09"}
SUN_DIST:         83.59 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.07d {+12h 56m 18s}   -7.09d {-07d 05' 06"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.91, 34.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      113.51, 75.23 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:25:52 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     209352,   Seg_Num: 0
GRB_RA:          239.1223d {+15h 56m 29.3s} (J2000),
                 239.0537d {+15h 56m 12.8s} (current),
                 239.6745d {+15h 58m 41.8s} (1950)
GRB_DEC:         +78.5693d {+78d 34' 09.4"} (J2000),
                 +78.5511d {+78d 33' 04.0"} (current),
                 +78.7110d {+78d 42' 39.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       167 [cnts]
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30253.62 SOD {08:24:13.62} UT,   118.8 [sec] since BAT Trigger Time
CENTROID_X:      275.38,  raw= 275  [pixels]
CENTROID_Y:      294.97,  raw= 295  [pixels]
ROLL:            11.50 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -9.02
GRB_POS_XRT_Z:   -61.09
IMAGE_URL:       sw00209352000msxps_rw.img
SUN_POSTN:        47.10d {+03h 08m 24s}  +17.62d {+17d 37' 09"}
SUN_DIST:         83.59 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.08d {+12h 56m 18s}   -7.09d {-07d 05' 09"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.91, 34.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      113.51, 75.23 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:25:36 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     209352,   Seg_Num: 0
GRB_RA:          239.1223d {+15h 56m 29.3s} (J2000),
                 239.0537d {+15h 56m 12.8s} (current),
                 239.6745d {+15h 58m 41.8s} (1950)
GRB_DEC:         +78.5693d {+78d 34' 09.4"} (J2000),
                 +78.5511d {+78d 33' 04.0"} (current),
                 +78.7110d {+78d 42' 39.7"} (1950)
GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       7.15e-09 [erg/cm2/sec]
GRB_SIGNIF:      12.92 [sigma]
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30253.62 SOD {08:24:13.62} UT,   118.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.18 261.31 243.16
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        47.10d {+03h 08m 24s}  +17.62d {+17d 37' 09"}
SUN_DIST:         83.59 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.07d {+12h 56m 18s}   -7.09d {-07d 05' 05"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.91, 34.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      113.51, 75.23 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact; see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:27:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     209352,   Seg_Num: 0
GRB_RA:          239.141d {+15h 56m 34s} (J2000),
                 239.073d {+15h 56m 18s} (current),
                 239.693d {+15h 58m 46s} (1950)
GRB_DEC:         +78.559d {+78d 33' 33"} (J2000),
                 +78.541d {+78d 32' 28"} (current),
                 +78.701d {+78d 42' 03"} (1950)
GRB_DATE:        13865 TJD;   130 DOY;   06/05/10
GRB_TIME:        30134.81 SOD {08:22:14.81} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -112.39 [deg]
GRB_THETA:        11.97 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.54 [sigma]
LC_URL:          sw00209352000msb.lc
SUN_POSTN:        47.10d {+03h 08m 24s}  +17.62d {+17d 37' 10"}
SUN_DIST:         83.60 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.09d {+12h 56m 22s}   -7.09d {-07d 05' 36"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      113.53, 75.24 [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 = 212.25,13.74 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:28:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.093d {+15h 56m 22s} (J2000)
POINT_DEC:       +78.553d {+78d 33' 12"} (J2000)
POINT_ROLL:      11.500d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30263.64 SOD {08:24:23.64} UT,   128.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.089
N_STARS:         34
X_OFFSET:        568 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00209352000msufc0128.fits
SUN_POSTN:        47.10d {+03h 08m 25s}  +17.62d {+17d 37' 11"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.10d {+12h 56m 23s}   -7.10d {-07d 05' 47"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.57, 75.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:29:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.093d {+15h 56m 22s} (J2000)
POINT_DEC:       +78.553d {+78d 33' 12"} (J2000)
ROLL:            11.500d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30263.64 SOD {08:24:23.64} UT,   128.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     168942264
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0128.fits
SUN_POSTN:        47.10d {+03h 08m 25s}  +17.62d {+17d 37' 11"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.10d {+12h 56m 24s}   -7.10d {-07d 05' 56"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.57, 75.23 [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:     Wed 10 May 06 08:31:08 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.093d {+15h 56m 22s} (J2000)
POINT_DEC:       +78.553d {+78d 33' 12"} (J2000)
POINT_ROLL:      11.500d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30263.64 SOD {08:24:23.64} UT,   128.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.089
N_STARS:         34
X_OFFSET:        568 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00209352000msufc0128.fits
SUN_POSTN:        47.10d {+03h 08m 25s}  +17.62d {+17d 37' 13"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.12d {+12h 56m 28s}   -7.11d {-07d 06' 24"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.57, 75.23 [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 10 May 06 08:31:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.093d {+15h 56m 22s} (J2000)
POINT_DEC:       +78.553d {+78d 33' 12"} (J2000)
ROLL:            11.500d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30263.64 SOD {08:24:23.64} UT,   128.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     168942264
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0128.fits
SUN_POSTN:        47.10d {+03h 08m 25s}  +17.62d {+17d 37' 13"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.12d {+12h 56m 28s}   -7.11d {-07d 06' 30"}
MOON_DIST:        88.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.57, 75.23 [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:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:38:08 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.095d {+15h 56m 23s} (J2000)
POINT_DEC:       +78.552d {+78d 33' 06"} (J2000)
POINT_ROLL:      11.503d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30368.93 SOD {08:26:08.93} UT,   234.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.982
N_STARS:         43
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00209352000msufc0234.fits
SUN_POSTN:        47.11d {+03h 08m 26s}  +17.62d {+17d 37' 17"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.17d {+12h 56m 40s}   -7.13d {-07d 08' 04"}
MOON_DIST:        88.96 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.58, 75.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:39:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.095d {+15h 56m 23s} (J2000)
POINT_DEC:       +78.552d {+78d 33' 06"} (J2000)
POINT_ROLL:      11.503d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30368.93 SOD {08:26:08.93} UT,   234.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.982
N_STARS:         43
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00209352000msufc0234.fits
SUN_POSTN:        47.11d {+03h 08m 26s}  +17.62d {+17d 37' 18"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.18d {+12h 56m 44s}   -7.14d {-07d 08' 29"}
MOON_DIST:        88.97 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.58, 75.23 [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 10 May 06 08:40:07 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.095d {+15h 56m 23s} (J2000)
POINT_DEC:       +78.552d {+78d 33' 06"} (J2000)
ROLL:            11.503d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30368.93 SOD {08:26:08.93} UT,   234.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     168942370
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0234.fits
SUN_POSTN:        47.11d {+03h 08m 26s}  +17.62d {+17d 37' 18"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.18d {+12h 56m 44s}   -7.14d {-07d 08' 32"}
MOON_DIST:        88.97 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.58, 75.23 [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).  
COMMENTS:        This notice was forced out after watchdog timer expiring -- most likely due to missing packet(s).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:41:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        239.095d {+15h 56m 23s} (J2000)
POINT_DEC:       +78.552d {+78d 33' 06"} (J2000)
ROLL:            11.503d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30368.93 SOD {08:26:08.93} UT,   234.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     168942370
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0234.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 20"}
SUN_DIST:         83.61 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      194.20d {+12h 56m 47s}   -7.15d {-07d 08' 56"}
MOON_DIST:        88.97 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      112.89, 34.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      113.58, 75.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:42:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        325.170d {+21h 40m 41s} (J2000)
POINT_DEC:       +56.185d {+56d 11' 08"} (J2000)
POINT_ROLL:      82.062d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30995.28 SOD {08:36:35.28} UT,   860.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.110
N_STARS:         36
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00209352000msufc0860.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 20"}
SUN_DIST:         70.95 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      194.20d {+12h 56m 48s}   -7.15d {-07d 09' 06"}
MOON_DIST:       117.75 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       98.60,  2.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        4.86, 62.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:43:08 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        325.170d {+21h 40m 41s} (J2000)
POINT_DEC:       +56.185d {+56d 11' 08"} (J2000)
ROLL:            82.062d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  30995.28 SOD {08:36:35.28} UT,   860.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     168942996
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0860.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 20"}
SUN_DIST:         70.95 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      194.21d {+12h 56m 50s}   -7.15d {-07d 09' 15"}
MOON_DIST:       117.75 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       98.60,  2.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        4.86, 62.71 [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 10 May 06 08:47:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        338.621d {+22h 34m 29s} (J2000)
POINT_DEC:       +17.984d {+17d 59' 03"} (J2000)
POINT_ROLL:      76.981d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  31100.50 SOD {08:38:20.50} UT,   965.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.119
N_STARS:         22
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      4
PHOTO_THRESH:    2
SL_URL:          sw00209352000msufc0965.fits
SUN_POSTN:        47.12d {+03h 08m 28s}  +17.62d {+17d 37' 23"}
SUN_DIST:         64.72 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      194.24d {+12h 56m 57s}   -7.17d {-07d 10' 14"}
MOON_DIST:       143.74 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       82.74,-33.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      347.57, 24.91 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:43:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        338.621d {+22h 34m 29s} (J2000)
POINT_DEC:       +17.984d {+17d 59' 03"} (J2000)
POINT_ROLL:      76.981d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  31100.50 SOD {08:38:20.50} UT,   965.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.119
N_STARS:         22
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      4
PHOTO_THRESH:    2
SL_URL:          sw00209352000msufc0965.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 21"}
SUN_DIST:         64.72 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      194.21d {+12h 56m 51s}   -7.16d {-07d 09' 24"}
MOON_DIST:       143.76 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       82.74,-33.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      347.57, 24.91 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sky_srclist.img.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_sources_srclist.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_field_srclist.ps.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:43:45 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        338.621d {+22h 34m 29s} (J2000)
POINT_DEC:       +17.984d {+17d 59' 03"} (J2000)
POINT_ROLL:      76.981d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  31100.50 SOD {08:38:20.50} UT,   965.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.119
N_STARS:         22
X_OFFSET:        600 [pixels]
Y_OFFSET:        503 [pixels]
X_MAX:           1559 [pixels]
Y_MAX:           1462 [pixels]
DET_THRESH:      4
PHOTO_THRESH:    2
SL_URL:          sw00209352000msufc0965.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 21"}
SUN_DIST:         64.72 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      194.21d {+12h 56m 51s}   -7.16d {-07d 09' 23"}
MOON_DIST:       143.76 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       82.74,-33.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      347.57, 24.91 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 May 06 08:44:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        338.621d {+22h 34m 29s} (J2000)
POINT_DEC:       +17.984d {+17d 59' 03"} (J2000)
ROLL:            76.981d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  31100.50 SOD {08:38:20.50} UT,   965.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     168943101
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0965.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 21"}
SUN_DIST:         64.72 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      194.22d {+12h 56m 52s}   -7.16d {-07d 09' 35"}
MOON_DIST:       143.76 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       82.74,-33.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      347.57, 24.91 [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 10 May 06 08:46:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     209352,   Seg_Num: 0
POINT_RA:        338.621d {+22h 34m 29s} (J2000)
POINT_DEC:       +17.984d {+17d 59' 03"} (J2000)
ROLL:            76.981d
IMG_START_DATE:  13865 TJD;   130 DOY;   06/05/10
IMG_START_TIME:  31100.50 SOD {08:38:20.50} UT,   965.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     168943101
X_OFFSET:        920 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1080
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00209352000msuni0965.fits
SUN_POSTN:        47.11d {+03h 08m 27s}  +17.62d {+17d 37' 22"}
SUN_DIST:         64.72 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      194.23d {+12h 56m 55s}   -7.17d {-07d 09' 58"}
MOON_DIST:       143.75 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       82.74,-33.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      347.57, 24.91 [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_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #5096
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), M. Capalbi (ASDC), M.L. Conciatore (ASDC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (GSFC/USRA), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Perri (ASDC) and L. Vetere (ASDC) report on behalf of the Swift Team:
At 08:22:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060510B (trigger=209352). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 239.141, +78.559 {15h 56m 34s, +78d 33' 33"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Because this is an image trigger, the TDRSS BAT light curve does not show any significant activity around the trigger time, but we note that there is possible activity at T+150 and T+300 sec. This possible long duration could be an indication of a high redshift burst.
The XRT began observing the field at 08:24:13 UT, 119 seconds after the BAT trigger. XRT found a bright, possibly fading, uncatalogued X-ray source located at RA(J2000) = 15h 56m 29.3s, Dec(J2000) = +78d 34' 09.4", with an estimated uncertainty of 4.7 arcseconds (90% confidence radius). This location is 39 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 7.1e-09 erg/cm2/s (0.2-10 keV).
UVOT took a finding chart exposure of nominal 100 seconds with the White (160-650nm) filter starting 129 seconds after the BAT trigger. No afterglow candidate has beeen found in the initial data products. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for extinction.
We note that this is the second Swift burst within 38 minutes. Because the second burst (GRB 060510B) overwrites the first (GRB 060510A) in the on-board automated observing program, the NFI follow-up observations for GRB 060510A will not be available until that burst can be uploaded as a ToO during normal working hours at the Swift Mission Operations Center.
GCN Circular #5097
N. Mirabal (U. Michigan) and J. P. Halpern (Columbia U.) report on behalf of the MDM Observatory GRB follow-up team:
"We have observed the Swift BAT location of GRB 060510 (Krim et al., GCN 5096) with the MDM 1.3m telescope on May 10 08:50 UT, 26 minutes after the trigger. We detect a faint source located at RA:15 56 29.615, Dec: 79 34 13.02 (+/- 2'') in a 600-s I band exposure, which is a potential optical afterglow for this event. The object appears to be fainter than R~22.5 in a previous 600~s exposure. This supports the idea that GRB 060510B could be a high-redshift or highly-reddened burst. Further observations are encouraged. Results here are very preliminary and analysis is in progress.
This message may be cited."
GCN Circular #5098
N. Mirabal (U. Michigan) and J. P. Halpern (Columbia U.) report on behalf of the MDM Observatory GRB follow-up team:
"The correct position of the object reported in our previous circular (GCN 5097) should read RA:15 56 29.615, Dec: 78 34 13.02 (+/- 2''). We apologize for this mistake. We thank Ken'ichi Torii for pointing it out."
GCN Circular #5099
P.A. Price (IfA, Hawaii), T. Minezaki (IoA, Tokyo), L.L. Cowie, Y. Kakazu (IfA, Hawaii) and Y. Yoshii (IoA, Tokyo) report:
We have observed the XRT localisation of GRB 060510b (GCN #5096) with the robotic MAGNUM telescope + MIPS dual-beam imager in the J band. Our observations consisted of 10 x 30 sec exposures commencing 2006 May 10.374 UTC. We do not detect any afterglow candidate at the XRT position, or at the faint optical afterglow candidate position of Mirabal & Halpern (GCN #5098), to an estimated limiting magnitude of J ~ 19.0 mag (based on comparison with the 2MASS catalogue star at 239.065708,78.573784 with J = 12.9 mag).
GCN Circular #5100
G. G. Williams (MMTO) and P. A. Milne (Steward Observatory), on behalf of the Super-LOTIS Collaboration, report:
The robotic 0.6-m Super-LOTIS telescope was manually triggered and began observing the error box of GRB 060510B (Swift Trigger 209352, GCN 5096) at 08:50:00.7 UT, ~28 minutes after the burst. Our initial observations include 5 x 10s exposures, 5 x 20s exposures, and 30 x 60s exposures, all in the R-band.
We do not detect the afterglow reported by Mirabal et al. (GCN 5097) or any other new source within the XRT error box in our first several 60-second exposures to the following 3-sigma limiting magnitude estimated using nearby USNO-B1.0 stars:
```
t obs (UT)	exp t (s)	t-t_0 (s)	Limit
--------------------------------------------------------
08:53:41	60 		1877 		R > 18.6
```
Additional observations and analysis are ongoing.
GCN Circular #5101
P.A. Price (IfA, Hawaii), S.B. Cenko (Caltech) and D.B. Fox (Penn State) report on behalf of a larger collaboration:
We have observed the XRT localisation of GRB 060510b (GCN #5096) with the Gemini North telescope + NIRI. Our observations consisted of 18 x 60 sec integrations commencing 2006 May 10.415 UTC. We detect the optical afterglow candidate of Mirabal & Halpern (GCN #5098), and estimate that the source is J ~ 19 mag (based on comparison with 2MASS star at 239.121115,+78.575104 with J = 16.6 mag).
A finding chart is available at: http://www.ifa.hawaii.edu/~price/grb060510b.ps
We have triggered optical spectroscopy observations with Gemini North.
GCN Circular #5102
Norbert Schartel at XMM-Newton/ESA reports:
XMM-Newton will observe GRB 060510B at location (RA=15h 56m 29.3s, DEC=+78d 34' 09.4", J2000), starting at 12:35 UT, on May 10, 2006, for an exposure of 43000 seconds.
GCN Circular #5103
A. Melandri, C. Guidorzi, C. Mundell, A. Gomboc, I.A. Steele, C.J. Mottram, A. Monfardini, S. Kobayashi, R.J. Smith, M.F. Bode (Liverpool JMU), P. O'Brien, E. Rol, N. Bannister (Leicester) report:
"The 2-m Faulkes North Telescope robotically followed up GRB060510B (Krimm et al., GCN 5096) and began observing 2.8 minutes after the GRB trigger time.
We confirm the detection of fading OT at the location identified by Mirabel et al. (GCN 5097) and Price et al. (GCN 5101).
The automatic "detection mode" procedure did not detect an optical afterglow candidate in the XRT error circle (Krimm et al., GCN 5096) reported by Mirabal et al. (GCN 5097) in the first short-exposure R images.
However, following visual inspection of subsequent co-added and single-frame images, the afterglow was clearly detected and found to be fading.
We estimate source magnitudes to be i'~20.2 +/- 0.2, at 31 min post trigger, and R~21.0 +/- 0.5 for the co-added image from 2.8 to 20.2 min after the burst (total exposure time 240 sec).
Further analysis and observation are still ongoing."
GCN Circular #5104
P.A. Price (IfA, Hawaii) reports on behalf of a larger collaboration:
We have observed the optical afterglow of GRB 060510b (GCN #5098) with the Gemini North telesecope + GMOS. Observations consisted of 2 x 1000 sec exposures with the 400 lines/mm grating, with the source at an airmass ~ 2. Based on the presence of a strong continuum break around 7250A which we identify as due to Ly alpha, we estimate a redshift of z= 4.9.
PAP thanks Nestor Mirabal for helpful discussion. We also thank the Gemini North observing team for performing these observations.
GCN Circular #5107
S. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), on behalf of the Swift-BAT team:
Using the data set from T-239.0 to T+423 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060510B (trigger #209352) (Krimm, et al., GCN 5096). The BAT ground-calculated position is (RA,Dec) = 239.215, 78.597 deg {15h 56m 51.6s, 78d 35' 48.7"} (J2000) +- 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%.
The mask-weighted light curve shows a very long period of emission extending from T+ ~25 sec to T+ ~330 sec. There are numerous (6-10) overlapping peaks in the light curve, with the two brightest peaks at T+ ~140 sec and T+ ~290 sec. T90 (15-350 keV) is 276 +- 10 sec (estimated error including systematics). This stretched-out emission is consistent with this burst being at high redshift (z=4.9, Price, GCN 5104). We have only fragmentary event data after T+423 sec, but the onboard mask-tagged light curves show no significant emission after this time.
The time-averaged spectrum from T-16.3 sec to T+326.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.76 +- 0.08. The fluence in the 15-150 keV band is 4.2 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+136.24 sec in the 15-150 keV band is 0.6 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
Given a redshift of z=4.9, we compute Eiso to be 2.04 X 10^53 ergs (88.5 - 885 keV in the rest frame.) This assumes a cosmology with Omega_M=0.3, Omega_lambda=0.7 and H0=65.
GCN Circular #5109
GRB 060510B: Swift/UVOT Upper Limits
S. T. Holland (NASA/GSFC & USRA) reports on behalf of the Swift/UVOT team:
The Swift UVOT began observing GRB 060510B (trigger #209351, Krimm et al., GCN Circular 5096) 111 seconds after the BAT trigger. No optical afterglow is detected at the location of the optical afterglow (Mirabal & Halpern 2006, GCN Circular 5097). The lack of detection in any UVOT filter is consistent with the burst having a redshift of z = 4.9 (Price 2006, GCN Circular 5104).
```
          Midpoint   Coadded    Upper
Filter     Time     Exposure   Limit
           (sec)      (sec)   (3 sigma)
V          1034       1598      21.2
B          5141        403      21.4
U          4950        433      21.1
UVW1       4736        413      20.6
UVM2       4852       1056      20.9
UVW2       5446        197      19.7
White       479        699      21.9
```
No correction has been made for the Galactic reddening of to E(B-V) = 0.04 mag (Schlegel et al. 1998) along the line of sight to GRB
GCN Circular #5110
M. Perri, M. Capalbi, M.L. Conciatore, L. Vetere (ASDC), H.A. Krimm (GSFC/USRA) and D.N. Burrows (PSU) report on behalf of the Swift/XRT team:
We have analyzed the first four orbits of Swift XRT data on the BAT GRB 060510B (Krimm, et al., GCN 5096; Barthelmy et al., GCN 5107). A 5.3 ks Photon Counting (PC) mode image gives a refined X-ray position of:
```
RA(J2000)  =  15h 56m 29.9s
Dec(J2000) = +78d 34' 09.7"
```
with an uncertainty of 3.6 arcsec (90% containment). This is 2 arcmin away from the center of the refined BAT position quoted in GCN 5107, and 1.8 arcsec away from the initial XRT position reported in GCN 5096.
The early 0.3-10 keV light curve has a complex behavior. The first orbit of data shows an initial shallow decay with slope ~ -0.3, a temporal break at about T+350s followed by a steep decay with slope ~ -11. Three X-ray flares at about T+200s, T+300s and T+880s are also observed during the first orbit. The afterglow decay between the second and the fourth orbit has a slope of ~ -0.4.
The X-ray spectrum covering the time period from T+128s to T+456s is well fit by an absorbed power-law with a photon index of 1.42+/-0.13 and column density of (1.5+/-0.1)e21 cm**-2. We note the Galactic column density in the direction of the source is 3.8e20 cm**-2. The observed (unabsorbed) 0.3-10 keV flux for this spectrum is 4.3e-9 (4.9e-9) erg/cm**2/s. All the quoted errors are at the 90% confidence level.
If the burst continues decaying at the current rate we estimate an XRT count rate of 6e-3 counts/s at T+24hr, which corresponds to an unabsorbed 0.3-10.keV flux of 3e-13 ergs cm**-2 s**-1.
This circular is an official product of the Swift XRT Team.
GCN Circular #5157
Sergio Campana (INAF/OAB) and Andrea DeLuca (INAF/IASF Milano) report:
We have analyzed the XMM-Newton observation of the field of GRB060510B, discovered by Swift/BAT on May 10 2006, 08:22:14 UT (Krimm et al., GCN 5096).
The XMM-Newton observation started ~5 hours after the GRB trigger and lasted for ~40 ks. The observation is affected by a high particle background, resulting in about 17 ks of usable data.
We report here on data collected by the EPIC/pn camera. The afterglow of GRB060510B is detected at the following coordinates:
```
RA(J2000): 15h 56m 29s.2,
Dec(J2000): +78d 34' 12.0",
```
with an uncertainty of 1.5 arcsec (1sigma), fully consistent with the reported Swift/XRT (Krimm et al.) and optical (Mirabal et al. GCN5097) positions.
Extracting source events from a circle of 30 arcsec radius, the pn time-averaged, background-subtracted count rate in the 0.5-8 keV range is of 0.11+/-0.003 cts/s.
The source is clearly fading with a power law decay with alpha=-0.7+/-0.1 (error at 90% c.l. for a single parameter) with reduced chi2=1.3, 16 d.o.f.
The time-integrated X-ray spectrum is well fit (reduced chi2=1.0, 72 d.o.f.) by a power law absorbed by a column NH=(9.4+/-3.5)x10^20 cm^-2 (error at 90% confidence level), slightly larger than the Galactic value of NH_gal=3.8x10^20 cm^-2 (Dickey & Lockman 1990), and with a photon index Gamma=2.7+/-0.3. Since the redshift of the GRB afterglow is known we consider also an intrinsic absorption at z=4.9 (Price, GCN5104). The fit is similarly good (reduced chi2=0.99, 72 d.o.f.) with NH_z=(2.1+/-1.2)x10^22 cm^-2 and Gamma=2.5+/-0.2. The observed flux (0.5-10 keV) is of 1.4x10^-13 erg cm^-2 s^-1, corresponding to an unabsorbed flux of 1.8x10^-13 erg cm^-2 s^-1. No spectral evolution as a function of time (first 16 ks vs. remaining 22 ks of data) has been observed.

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Jochen Greiner, last update: 23-May-2006 [Disclaimer]