Gamma-ray Burst 080328

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:03:30 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.479d {+05h 21m 55s} (J2000),
                  80.634d {+05h 22m 32s} (current),
                  79.539d {+05h 18m 09s} (1950)
GRB_DEC:         +47.524d {+47d 31' 26"} (J2000),
                 +47.532d {+47d 31' 53"} (current),
                 +47.476d {+47d 28' 33"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7673 [cnts]    Image_Peak=487 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   149     E_range: 50-350 keV
BKG_INTEN:       36722 [cnts]
BKG_TIME:        28973.32 SOD {08:02:53.32} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14553 TJD;    88 DOY;   08/03/28
GRB_TIME:        28984.58 SOD {08:03:04.58} UT
GRB_PHI:           2.03 [deg]
GRB_THETA:        45.03 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     44.24 [sigma]
IMAGE_SIGNIF:    15.28 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3 +15  +0  +1 -23  +1 
SUN_POSTN:         7.36d {+00h 29m 27s}   +3.18d {+03d 10' 48"}
SUN_DIST:         76.41 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.41d {+17h 17m 38s}  -27.83d {-27d 49' 55"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.84,  6.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       82.96, 24.32 [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 = 93.30,6.25 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:05:39 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.4836d {+05h 21m 56.0s} (J2000),
                  80.6385d {+05h 22m 33.2s} (current),
                  79.5440d {+05h 18m 10.5s} (1950)
GRB_DEC:         +47.5104d {+47d 30' 37.4"} (J2000),
                 +47.5179d {+47d 31' 04.5"} (current),
                 +47.4621d {+47d 27' 43.6"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       236 [cnts]
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29084.02 SOD {08:04:44.02} UT,   99.4 [sec] since BAT Trigger Time
CENTROID_X:      338.85,  raw= 339  [pixels]
CENTROID_Y:      332.16,  raw= 332  [pixels]
ROLL:            259.54 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   80.53
GRB_POS_XRT_Z:   86.18
IMAGE_URL:       sw00307931000msxps_rw.img
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 50"}
SUN_DIST:         76.41 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.43d {+17h 17m 43s}  -27.83d {-27d 49' 57"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.85,  6.17 [deg] galactic lon,lat of the burst
ECL_COORDS:       82.96, 24.30 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:05:48 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.4836d {+05h 21m 56.0s} (J2000),
                  80.6385d {+05h 22m 33.2s} (current),
                  79.5440d {+05h 18m 10.5s} (1950)
GRB_DEC:         +47.5104d {+47d 30' 37.4"} (J2000),
                 +47.5179d {+47d 31' 04.5"} (current),
                 +47.4621d {+47d 27' 43.6"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       236 [cnts]
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29084.02 SOD {08:04:44.02} UT,   99.4 [sec] since BAT Trigger Time
CENTROID_X:      338.85,  raw= 339  [pixels]
CENTROID_Y:      332.16,  raw= 332  [pixels]
ROLL:            259.54 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   80.53
GRB_POS_XRT_Z:   86.18
IMAGE_URL:       sw00307931000msxps_rw.img
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 50"}
SUN_DIST:         76.41 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.43d {+17h 17m 43s}  -27.83d {-27d 49' 57"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.85,  6.17 [deg] galactic lon,lat of the burst
ECL_COORDS:       82.96, 24.30 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:05:29 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.4836d {+05h 21m 56.0s} (J2000),
                  80.6385d {+05h 22m 33.2s} (current),
                  79.5440d {+05h 18m 10.5s} (1950)
GRB_DEC:         +47.5104d {+47d 30' 37.4"} (J2000),
                 +47.5179d {+47d 31' 04.5"} (current),
                 +47.4621d {+47d 27' 43.6"} (1950)
GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.08e-08 [erg/cm2/sec]
GRB_SIGNIF:      15.36 [sigma]
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29084.02 SOD {08:04:44.02} UT,   99.4 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.25 261.60 243.33
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 50"}
SUN_DIST:         76.41 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.43d {+17h 17m 43s}  -27.83d {-27d 49' 57"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.85,  6.17 [deg] galactic lon,lat of the burst
ECL_COORDS:       82.96, 24.30 [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:     Fri 28 Mar 08 08:07:02 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.479d {+05h 21m 55s} (J2000),
                  80.634d {+05h 22m 32s} (current),
                  79.539d {+05h 18m 09s} (1950)
GRB_DEC:         +47.524d {+47d 31' 26"} (J2000),
                 +47.532d {+47d 31' 53"} (current),
                 +47.476d {+47d 28' 33"} (1950)
GRB_DATE:        14553 TJD;    88 DOY;   08/03/28
GRB_TIME:        28984.58 SOD {08:03:04.58} UT
TRIGGER_INDEX:   149
GRB_PHI:           2.03 [deg]
GRB_THETA:        45.03 [deg]
DELTA_TIME:      -5.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     44.24 [sigma]
IMAGE_SIGNIF:    15.28 [sigma]
LC_URL:          sw00307931000msb.lc
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 51"}
SUN_DIST:         76.41 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.44d {+17h 17m 46s}  -27.83d {-27d 49' 59"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.84,  6.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       82.96, 24.32 [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 = 93.30,6.25 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:07:55 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.528d {+47d 31' 42"} (J2000)
POINT_ROLL:      259.538d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29092.56 SOD {08:04:52.56} UT,   108.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.117
N_STARS:         138
X_OFFSET:        296 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1255 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00307931000msufc0107.fits
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 52"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.45d {+17h 17m 48s}  -27.83d {-27d 50' 00"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:08:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.528d {+47d 31' 42"} (J2000)
POINT_ROLL:      259.538d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29092.56 SOD {08:04:52.56} UT,   108.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.117
N_STARS:         138
X_OFFSET:        296 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1255 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00307931000msufc0107.fits
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 53"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.46d {+17h 17m 50s}  -27.83d {-27d 50' 00"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:09:11 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.528d {+47d 31' 42"} (J2000)
ROLL:            259.538d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29092.56 SOD {08:04:52.56} UT,   108.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     228384295
X_OFFSET:        567 [pixels]
Y_OFFSET:        826 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       727
Y_GRB_POS:       986
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0107.fits
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 53"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.46d {+17h 17m 51s}  -27.83d {-27d 50' 01"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:09:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.528d {+47d 31' 42"} (J2000)
ROLL:            259.538d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29092.56 SOD {08:04:52.56} UT,   108.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     228384295
X_OFFSET:        567 [pixels]
Y_OFFSET:        826 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       727
Y_GRB_POS:       986
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0107.fits
SUN_POSTN:         7.37d {+00h 29m 28s}   +3.18d {+03d 10' 54"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.47d {+17h 17m 52s}  -27.83d {-27d 50' 01"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:16:55 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.540d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29199.52 SOD {08:06:39.52} UT,   214.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.683
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0214.fits
SUN_POSTN:         7.37d {+00h 29m 29s}   +3.18d {+03d 11' 01"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.53d {+17h 18m 08s}  -27.84d {-27d 50' 09"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:17:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.540d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29199.52 SOD {08:06:39.52} UT,   214.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.683
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0214.fits
SUN_POSTN:         7.37d {+00h 29m 30s}   +3.18d {+03d 11' 02"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.54d {+17h 18m 10s}  -27.84d {-27d 50' 10"}
MOON_DIST:       160.28 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:18:17 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.540d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29199.52 SOD {08:06:39.52} UT,   214.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     228384402
X_OFFSET:        567 [pixels]
Y_OFFSET:        826 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       727
Y_GRB_POS:       986
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0214.fits
SUN_POSTN:         7.37d {+00h 29m 30s}   +3.18d {+03d 11' 02"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.55d {+17h 18m 11s}  -27.84d {-27d 50' 11"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:18:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.540d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29199.52 SOD {08:06:39.52} UT,   214.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     228384402
X_OFFSET:        567 [pixels]
Y_OFFSET:        826 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       727
Y_GRB_POS:       986
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0214.fits
SUN_POSTN:         7.37d {+00h 29m 30s}   +3.18d {+03d 11' 03"}
SUN_DIST:         76.38 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.55d {+17h 18m 12s}  -27.84d {-27d 50' 11"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:23:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29849.41 SOD {08:17:29.41} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.463
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0864.fits
SUN_POSTN:         7.38d {+00h 29m 30s}   +3.19d {+03d 11' 07"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.59d {+17h 18m 22s}  -27.84d {-27d 50' 16"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:23:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29849.41 SOD {08:17:29.41} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.463
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0864.fits
SUN_POSTN:         7.38d {+00h 29m 30s}   +3.19d {+03d 11' 08"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.60d {+17h 18m 24s}  -27.84d {-27d 50' 17"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:24:46 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29849.41 SOD {08:17:29.41} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     228385052
X_OFFSET:        566 [pixels]
Y_OFFSET:        825 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       726
Y_GRB_POS:       985
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0864.fits
SUN_POSTN:         7.38d {+00h 29m 31s}   +3.19d {+03d 11' 09"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.61d {+17h 18m 26s}  -27.84d {-27d 50' 18"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:25:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29849.41 SOD {08:17:29.41} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     228385052
X_OFFSET:        566 [pixels]
Y_OFFSET:        825 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       726
Y_GRB_POS:       985
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0864.fits
SUN_POSTN:         7.38d {+00h 29m 31s}   +3.19d {+03d 11' 09"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.61d {+17h 18m 26s}  -27.84d {-27d 50' 18"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:24:12 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.4832d {+05h 21m 55.9s} (J2000),
                  80.6381d {+05h 22m 33.1s} (current),
                  79.5436d {+05h 18m 10.4s} (1950)
GRB_DEC:         +47.5110d {+47d 30' 39.6"} (J2000),
                 +47.5185d {+47d 31' 06.6"} (current),
                 +47.4627d {+47d 27' 45.7"} (1950)
GRB_ERROR:       2.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29244.00 SOD {08:07:24.00} UT,   259.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:         7.38d {+00h 29m 31s}   +3.19d {+03d 11' 08"}
SUN_DIST:         76.40 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.60d {+17h 18m 24s}  -27.84d {-27d 50' 17"}
MOON_DIST:       160.30 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.85,  6.17 [deg] galactic lon,lat of the burst
ECL_COORDS:       82.96, 24.30 [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.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:25:30 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     307931,   Seg_Num: 0
GRB_RA:           80.4826d {+05h 21m 55.82s} (J2000),
                  80.6375d {+05h 22m 33.01s} (current),
                  79.5430d {+05h 18m 10.31s} (1950)
GRB_DEC:         +47.5108d {+47d 30' 38.8"} (J2000),
                 +47.5183d {+47d 31' 05.9"} (current),
                 +47.4625d {+47d 27' 45.0"} (1950)
GRB_ERROR:       0.4 [arcsec radius, statistical only]
GRB_MAG:         17.70 +/- 0.50 [mag]
FILTER:          3, V
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29201.00 SOD {08:06:41.00} UT,   216.4 [sec] since BAT Trigger Time
SUN_POSTN:         7.38d {+00h 29m 31s}   +3.19d {+03d 11' 09"}
SUN_DIST:         76.40 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.61d {+17h 18m 27s}  -27.84d {-27d 50' 18"}
MOON_DIST:       160.30 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.85,  6.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       82.96, 24.30 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:30:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29955.51 SOD {08:19:15.51} UT,   970.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.363
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0970.fits
SUN_POSTN:         7.38d {+00h 29m 31s}   +3.19d {+03d 11' 14"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.66d {+17h 18m 38s}  -27.84d {-27d 50' 23"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Mar 08 08:31:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
POINT_ROLL:      259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29955.51 SOD {08:19:15.51} UT,   970.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.363
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        506 [pixels]
X_MAX:           1206 [pixels]
Y_MAX:           1465 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00307931000msufc0970.fits
SUN_POSTN:         7.38d {+00h 29m 32s}   +3.19d {+03d 11' 15"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.66d {+17h 18m 39s}  -27.84d {-27d 50' 24"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:31:44 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29955.51 SOD {08:19:15.51} UT,   970.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     228385158
X_OFFSET:        566 [pixels]
Y_OFFSET:        825 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       726
Y_GRB_POS:       985
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0970.fits
SUN_POSTN:         7.38d {+00h 29m 32s}   +3.19d {+03d 11' 15"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.67d {+17h 18m 41s}  -27.84d {-27d 50' 25"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [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:     Fri 28 Mar 08 08:32:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     307931,   Seg_Num: 0
POINT_RA:         80.442d {+05h 21m 46s} (J2000)
POINT_DEC:       +47.527d {+47d 31' 37"} (J2000)
ROLL:            259.539d
IMG_START_DATE:  14553 TJD;    88 DOY;   08/03/28
IMG_START_TIME:  29955.51 SOD {08:19:15.51} UT,   970.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     228385158
X_OFFSET:        566 [pixels]
Y_OFFSET:        825 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       726
Y_GRB_POS:       985
BINNING_INDEX:   1
IM_URL:          sw00307931000msuni0970.fits
SUN_POSTN:         7.38d {+00h 29m 32s}   +3.19d {+03d 11' 16"}
SUN_DIST:         76.37 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      259.68d {+17h 18m 42s}  -27.84d {-27d 50' 25"}
MOON_DIST:       160.29 [deg]
MOON_ILLUM:      65 [%]
GAL_COORDS:      161.82,  6.15 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       82.93, 24.32 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_sources_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #7525
M. Perri (ASDC), D. N. Burrows (PSU), S. Campana (INAF-OAB), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL), D. Perez (U Leicester), P. Romano (INAF-IASFPA), R. L. C. Starling (U Leicester), G. Stratta (ASDC), D. E. Vanden Berk (PSU), P. A. Ward (MSSL-UCL) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:
At 08:03:04 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080328 (trigger=307931). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 80.479, +47.524 which is
```
   RA(J2000) = 05h 21m 55s
   Dec(J2000) = +47d 31' 26"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 110 sec. The peak count rate was ~9500 counts/sec (15-350 keV), at ~10 sec after the trigger.
The XRT began observing the field at 08:04:44.0 UT, 99.4 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 80.48189, 47.51035 which is equivalent to:
```
   RA(J2000)  = 05h 21m 55.65s
   Dec(J2000) = +47d 30' 37.3"
```
with an uncertainty of 2.6 arcseconds (radius, 90% containment). This location is 49 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 3.38e+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/307931/.
The initial flux in the 2.5 s image was 1.08e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of nominal 400 seconds with the V filter starting 216 seconds after the BAT trigger. There is a candidate afterglow in the list of sources generated on-board at
```
  RA(J2000)  =	05:21:55.85 =  80.4827
  DEC(J2000) = +47:30:39.2  =  47.5109
```
with a 1-sigma error radius of about 0.6 arc sec. This position is 2.8 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.7 with a 1-sigma error of about 0.5 mag. No correction has been made for the expected extinction of about 1.9 magnitudes.
Burst Advocate for this burst is M. Perri (perri AT asdc.asi.it). 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 #7526
C. Guidorzi (INAF-OAB),, A. Gomboc (U. Ljubljana), D. Bersier, C.G. Mundell, I.A. Steele, R.J. Smith, D. Carter, S. Kobayashi, M. Bode (Liverpool JMU), P. O'Brien, N. Bannister, N. Tanvir (U. Leicester) report:
The 2-m Faulkes North Telescope (Hawaii) automatically reacted to the Swift burst GRB080328 (trigger=307931, Perri et al. GCN 7525).
Observations started about 167 s after the trigger time. We confirm the detection of the optical counterpart by UVOT.
From the first 3x10 s exposure frames in R, we estimate a temporal decay index between 167 and 240 s after the trigger time of alpha = 1.4 +/- 0.2.
```
Filter  Tstart(s)  Exposure(s)    Mag
-----------------------------------------------
    R       167           10      16.96 +/- 0.02
    R       198           10      17.26 +/- 0.02
    R       230           10      17.44 +/- 0.02
-----------------------------------------------
```
Magnitudes are calibrated with respect to USNOB1 R2 in the R filter. A systematic error on absolute magnitudes of ~0.3 must be included.
GCN Circular #7527
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 855 s of overlapping XRT Photon Counting mode and UVOT data for GRB 080328, 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 = 80.48231, +47.51063 which is equivalent to:
```
RA (J2000): 05h 21m 55.75s
Dec (J2000): +47d 30' 38.3"
```
with an uncertainty of 1.7 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401 http://www.swift.ac.uk/xrt_positions/Goad.pdf), the current algorithm is an extension of this method.
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #7530
P. Ward (MSSL-UCL), P. Schady (MSSL-UCL) and M. Perri (ASDC) report on behalf of the Swift-UVOT team
The Swift/UVOT observed the field of GRB 080328 starting 110s after the BAT trigger (Perri et al., GCN 7525). The afterglow is detected at
```
RA:      05h 21m 55.87s
DEC:  +47d 30' 39.4"
```
only in the white and v filters, with an error radius of 0.6 arcsec (90% confidence). The afterglow is seen to decay in both these filters, and has the following magnitudes and 3-sigma upper limits (in the UVOT photometric system, Poole et al. (2008, MNRAS, 383, 627)).
```
Filter	Tstart(s) 	Exp(s)	 Magnitude

white	110		99.8	17.84 +/- 0.05
white	867		99.8	20.43 +/- 0.27
white	5611	        399.8	> 21.60
v	217		399.8	17.90 +/- 0.08
v	973		399.8	19.25 +/- 0.20
v	6023	        399.8	> 20.00 	
```
The afterglow is not detected in any other filters, perhaps due to the high Galactic extinction value of E(B-V) = 0.58 mag. The following are the 3-sigma upper limits for these filters.
```
Filter	Tstart(s) 	Exp(s)	 Magnitude

b	851		493.6   > 20.96
u 	673		338.5  	> 20.59
uvw1	648		362.8  	> 20.54
uvm2	623		393.2	> 20.38
uvw2	728		498.5  	> 20.88
```
The values quoted above are not corrected for Galactic extinction corresponding to a reddening of E(B-V) = 0.58 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #7532
M. Perri and G. Stratta (ASDC) report on behalf of the Swift XRT team:
We have analysed the first 3 orbits of Swift XRT data of the BAT GRB 080328 (Perri et al., GCN Circ. 7525). The data consist of 151 s in Windowed Timing (WT) mode, from T+108s to T+259s, and of 6.9 ks in Photon Counting (PC) mode thereafter.
The best XRT position is the UVOT-enhanced position reported by Beardmore et al. (GCN Circ. 7527).
The early 0.3-10 keV X-ray light curve in WT mode shows a rapid decay. Starting from T+260s up to T+13.7ks the curve is well fit by a broken power-law model with decay indices alpha1=-0.57 (+0.09) (-0.06), alpha2=-1.10 (+/-0.05) and a temporal break at (1.7+/-0.3) ks.
The WT X-ray spectrum is well fit by an absorbed power-law model with a photon index of 2.1 (+/-0.1), a column density of (4.2+/-0.4)e21 cm**-2 and an average observed 0.3-10 keV flux of 9.3e-10 erg/cm**2/s. The PC X-ray spectrum during the first orbit, from T+260s to T+2106s, is also well fit by an absorbed power-law model with a photon index of 2.2 (+/-0.1) and a column density of (5.0+/-0.6)e21 cm**-2. The observed 0.3-10 keV flux for this spectrum is 1.5e-10 erg/cm**2/s. We note the Galactic column density in the direction of the source is 3.4e21 cm**-2.
Assuming the X-ray emission continues to decline at the same rate, we predict a 0.3-10 keV XRT count rate of 0.03 count/s at T+24hr, which corresponds to an observed 0.3-10 keV flux of about 1.4e-12 erg/cm**2/s.
This circular is an official product of the Swift XRT Team.
GCN Circular #7533
H. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), M. Perri (ASDC), 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-120 to T+183 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080328 (trigger #307931) (Perri, et al., GCN Circ. 7525). The BAT ground-calculated position is RA, Dec = 80.490, 47.523 deg which is
```
    RA(J2000)  =  05h 21m 57.7s
    Dec(J2000) = +47d 31' 23.8"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 37%.
The mask-weighted light curve consists of about about ten major pulses spread over ~100 sec. T90 (15-350 keV) is 90.6 +- 1.5 sec (estimated error including systematics).
The time-averaged spectrum from T-2.2 to T+117.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.52 +- 0.04. The fluence in the 15-150 keV band is 9.4 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+9.3 sec in the 15-150 keV band is 5.5 +- 0.3 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/307931/BA/
GCN Circular #7534
T. A. Fatkullin, A. Moskvitin, V. V. Sokolov (SAO-RAS, Nizhnij Arkhyz),=20 A. Pozanenko (IKI, Moscow), A. de Ugarte Postigo (ESO, Santiago), M.=20 Jel=EDnek, J. Gorosabel and A. J. Castro-Tirado (IAA-CSIC Granada), on=20 behalf of a larger collaboration, report:
"Following the detection of GRB 080328 by Swift (Perri et al. GCNC=20 7525), we have obtained BVRI imaging and spectroscopy (3800-7500 A) with=20 the 6.0m BTA SAO-RAS telescope starting on Mar 28.76 UT (i.e. 12.4 hr=20 after the onset of the event). A faint optical source (with R about=20 22.5) consistent with the UVOT position (Ward et al. GCNC 7530) is=20 detected in all frames, thus implying an upper limit of about 2.5 for=20 the GRB 080328 redshift. Its brightness is not consistent with the=20 extrapolation of the early decay reported by Guidorzi et al. (GCNC 7526)=20 indicating significant contribution of the reverse shock emission in the=20 FTN data. Our BTA spectrum (2 x 900s) shows only a faint continuum and=20 nothing conclusive can be reported (except the non-existence of strong=20 emission lines arising from an underlying host galaxy)."
This message can be quoted.
GCN Circular #7548
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and T. Cline on behalf of the Konus-Wind team report:
The long GRB 080328 (Swift-BAT trigger #307931: Perri et al., GCN 7525, Krimm et al., GCN 7533) triggered Konus-Wind at T0=28982.306 s UT (08:03:02.306).
The burst light curve shows a multipeaked structure with a total duration of ~90 s.
As observed by Konus-Wind the burst had a fluence of 2.23(-0.22, +0.23)x10^-5 erg/cm2, and a 256-ms peak flux measured from T0+10.512 s of (2.51 +/- 0.41)x10^-6 erg/cm2/s (both in the 20 keV - 1 MeV energy range).
The time-integrated spectrum of the burst (from T0 to T0+90.368 s) is well fitted (in the 20 keV-1 MeV range) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.13(-0.20, +0.17), and Ep = 289(-57, +93) keV (chi2 = 62.8/56 dof).
The spectrum of the most intense part (from T0+8.448 to T0+16.640 s) is well fitted (in the same range) by a power law with exponential cutoff model with alpha = -0.59(-0.19, +0.17) and Ep = 338(-40, +51) keV (chi2 = 60.8/56 dof). The fluence of this part is (8.79 +/- 0.68)x10^-6 erg/cm2.
All the quoted errors are at the 90% confidence level.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB080328_T28982/
GCN Circular #7551
N. Kodaka, M. Tashiro, Y. Terada, Y. Urata, A. Endo, K. Onda, M. Suzuki, K. Morigami (Saitama U.), K. Yamaoka, Y. E. Nakagawa, S. Sugita (Aoyama Gakuin U.), M. Ohno, T. Uehara, T. Takahashi, Y. Fukazawa, C. Kira, Y. Hanabata (Hiroshima U.), T. Tamagawa (RIKEN), T. Enoto, R. Miyawaki, K. Nakazawa, K. Makishima (Univ. of Tokyo), E. Sonoda, M. Yamauchi, H. Tanaka, R. Hara (Univ. of Miyazaki), M. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA), S. Hong (Nihon U.), on behalf of the Suzaku WAM team, report:
The long GRB 080328 (Swift/BAT trigger #307931 ; Perri et al., GCN 7525) was detected by the the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2008-03-28 08:03:14 UT (=T0). The observed light curve shows a multi-peaked structure starting at T0+0s, ending at T0+100 with a duration (T90) of about 85 seconds. The fluence in 100 - 1000 keV was 1.61 (-0.40,+0.37) * 10^-5 erg/cm^2. The 1-s peak flux measured from T0+0s was 6.4 (-0.39,+0.39) photons/cm^2/s in the same energy range.
Preliminary result shows that the time-averaged spectrum from T0-0s to T0+100s is well fitted by a single power-law with a photon index of 1.72 (-0.26, +0.38) (chi^2/d.o.f = 11.9/15). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included.
The light curves for this burst are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html
GCN Circular #7557
H.Tanaka, K.Kono, R.Hara, N.Ohmori, H.hayasi, M.Yamauchi, E.Sonoda (University of Miyazaki)
We have observed the field covering the error circle of GRB080328 (GCN 7527, A.P. Beardmore et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 11:09:32 UT; about 186 minutes after the Swift trigger time.
We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, there is no new source at the reported position.
the upper limits are as follows:
```
--------------------------------------------------------------
Start(UT) End(UT)	Num. of frames 	Limit (mag.)
--------------------------------------------------------------
11:10:49 11:11:07 	1 		~15.74
11:10:59 12:58:24 	65 		~17.70
---------------------------------------------------------------
```
GCN Circular #7562
K. Kinugasa, O. Hashimoto, S. Honda, E. Nishihara, Y. Kozai (Gunma Astronomical Observatory) and H. Karoji (NAOJ) report:
The field of GRB 080328 (Perri et al. GCN 7525) was observed with the 150 cm telescope of the Gunma Astronomical Observatory. Starting at 09:49 UT (1.75 hours after the trigger), Rc frames were acquired for 9 x 3-min exposures under a poor seeing (~4.5arcsec) condition.
The UVOT position is close to a star, so that the field are affected with the light from this star. We do not identify the optical counterpart reported by UVOT to limiting magnitudes of Rc=20.7 relative to USNO-B1.0 R2 magnitudes at the meantime of 10:08 UT.
Combining the results reported by Guidorzi et al. (GCN 7526), the decay index is > 0.9, which is consistent with the intial index reported by Guidorzi et al. (GCN 7526).
GCN Report 123.1
GCN_Report 123.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_123_1.pdf by M. Perri at ASDC titled: "Final Swift Observations of GRB 080328"

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Jochen Greiner, last update: 09-Apr-2008 [Disclaimer]