Gamma-ray Burst 080520

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:20:58 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     312047,   Seg_Num: 0
GRB_RA:          280.192d {+18h 40m 46s} (J2000),
                 280.365d {+18h 41m 28s} (current),
                 279.159d {+18h 36m 38s} (1950)
GRB_DEC:         -55.004d {-55d 00' 13"} (J2000),
                 -54.995d {-54d 59' 43"} (current),
                 -55.051d {-55d 03' 01"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       10995 [cnts]    Image_Peak=348 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   443     E_range: 15-50 keV
BKG_INTEN:       116953 [cnts]
BKG_TIME:        80389.19 SOD {22:19:49.19} UT
BKG_DUR:         24 [sec]
GRB_DATE:        14606 TJD;   141 DOY;   08/05/20
GRB_TIME:        80424.77 SOD {22:20:24.77} UT
GRB_PHI:         -157.86 [deg]
GRB_THETA:        17.36 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.63 [sigma]
IMAGE_SIGNIF:    8.70 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +1  +0  +0  +0 +68  +1 
SUN_POSTN:        58.08d {+03h 52m 19s}  +20.20d {+20d 12' 07"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.90d {+16h 27m 35s}  -26.55d {-26d 32' 48"}
MOON_DIST:        37.42 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.47 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      276.86,-31.81 [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 = 71.59,-20.55 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:22:11 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.206d {+18h 40m 50s} (J2000)
POINT_DEC:       -55.008d {-55d 00' 29"} (J2000)
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80524.30 SOD {22:22:04.30} UT,   99.5 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:24:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.207d {+18h 40m 50s} (J2000)
POINT_DEC:       -55.008d {-55d 00' 29"} (J2000)
POINT_ROLL:      120.598d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80529.37 SOD {22:22:09.37} UT,   104.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.525
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00312047000msufc0104.fits
SUN_POSTN:        58.08d {+03h 52m 20s}  +20.20d {+20d 12' 09"}
SUN_DIST:        132.92 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.93d {+16h 27m 42s}  -26.55d {-26d 33' 01"}
MOON_DIST:        37.42 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:24:27 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     312047,   Seg_Num: 0
GRB_RA:          280.192d {+18h 40m 46s} (J2000),
                 280.365d {+18h 41m 28s} (current),
                 279.159d {+18h 36m 38s} (1950)
GRB_DEC:         -55.004d {-55d 00' 13"} (J2000),
                 -54.995d {-54d 59' 43"} (current),
                 -55.051d {-55d 03' 01"} (1950)
GRB_DATE:        14606 TJD;   141 DOY;   08/05/20
GRB_TIME:        80424.77 SOD {22:20:24.77} UT
TRIGGER_INDEX:   443
GRB_PHI:         -157.86 [deg]
GRB_THETA:        17.36 [deg]
DELTA_TIME:      -37.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.63 [sigma]
IMAGE_SIGNIF:    8.70 [sigma]
LC_URL:          sw00312047000msb.lc
SUN_POSTN:        58.08d {+03h 52m 20s}  +20.20d {+20d 12' 09"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.93d {+16h 27m 43s}  -26.55d {-26d 33' 01"}
MOON_DIST:        37.41 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.47 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      276.86,-31.81 [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 = 71.59,-20.55 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:24:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.207d {+18h 40m 50s} (J2000)
POINT_DEC:       -55.008d {-55d 00' 29"} (J2000)
POINT_ROLL:      120.598d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80529.37 SOD {22:22:09.37} UT,   104.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.525
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00312047000msufc0104.fits
SUN_POSTN:        58.08d {+03h 52m 20s}  +20.20d {+20d 12' 09"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.93d {+16h 27m 44s}  -26.55d {-26d 33' 03"}
MOON_DIST:        37.41 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:25:36 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.207d {+18h 40m 50s} (J2000)
POINT_DEC:       -55.008d {-55d 00' 29"} (J2000)
ROLL:            120.598d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80529.37 SOD {22:22:09.37} UT,   104.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     233014932
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0104.fits
SUN_POSTN:        58.08d {+03h 52m 20s}  +20.20d {+20d 12' 10"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.94d {+16h 27m 45s}  -26.55d {-26d 33' 06"}
MOON_DIST:        37.41 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:26:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.207d {+18h 40m 50s} (J2000)
POINT_DEC:       -55.008d {-55d 00' 29"} (J2000)
ROLL:            120.598d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80529.37 SOD {22:22:09.37} UT,   104.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     233014932
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0104.fits
SUN_POSTN:        58.08d {+03h 52m 20s}  +20.20d {+20d 12' 10"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      246.94d {+16h 27m 46s}  -26.55d {-26d 33' 08"}
MOON_DIST:        37.41 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:32:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80635.46 SOD {22:23:55.46} UT,   210.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.543
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00312047000msufc0210.fits
SUN_POSTN:        58.09d {+03h 52m 21s}  +20.20d {+20d 12' 13"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.00d {+16h 28m 00s}  -26.56d {-26d 33' 33"}
MOON_DIST:        37.37 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:33:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80635.46 SOD {22:23:55.46} UT,   210.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.543
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00312047000msufc0210.fits
SUN_POSTN:        58.09d {+03h 52m 21s}  +20.20d {+20d 12' 13"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.01d {+16h 28m 02s}  -26.56d {-26d 33' 35"}
MOON_DIST:        37.37 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:33:28 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     312047,   Seg_Num: 0
GRB_RA:          280.1933d {+18h 40m 46.3s} (J2000),
                 280.3663d {+18h 41m 27.9s} (current),
                 279.1606d {+18h 36m 38.5s} (1950)
GRB_DEC:         -54.9918d {-54d 59' 30.4"} (J2000),
                 -54.9835d {-54d 59' 00.4"} (current),
                 -55.0386d {-55d 02' 18.9"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80535.00 SOD {22:22:15.00} UT,   110.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        58.09d {+03h 52m 21s}  +20.20d {+20d 12' 14"}
SUN_DIST:        132.94 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.01d {+16h 28m 02s}  -26.56d {-26d 33' 37"}
MOON_DIST:        37.35 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.64,-20.47 [deg] galactic lon,lat of the burst
ECL_COORDS:      276.86,-31.79 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:33:50 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80635.46 SOD {22:23:55.46} UT,   210.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     233015038
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0210.fits
SUN_POSTN:        58.09d {+03h 52m 21s}  +20.20d {+20d 12' 14"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.01d {+16h 28m 03s}  -26.56d {-26d 33' 38"}
MOON_DIST:        37.37 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:34:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80635.46 SOD {22:23:55.46} UT,   210.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     233015038
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0210.fits
SUN_POSTN:        58.09d {+03h 52m 21s}  +20.20d {+20d 12' 14"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.02d {+16h 28m 04s}  -26.56d {-26d 33' 39"}
MOON_DIST:        37.36 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:36:46 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.603d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81282.81 SOD {22:34:42.81} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.972
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00312047000msufc0858.fits
SUN_POSTN:        58.09d {+03h 52m 22s}  +20.20d {+20d 12' 15"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.04d {+16h 28m 10s}  -26.56d {-26d 33' 49"}
MOON_DIST:        37.35 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:37:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.603d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81282.81 SOD {22:34:42.81} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.972
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00312047000msufc0858.fits
SUN_POSTN:        58.09d {+03h 52m 22s}  +20.20d {+20d 12' 15"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.04d {+16h 28m 11s}  -26.56d {-26d 33' 51"}
MOON_DIST:        37.35 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:38:12 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.603d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81282.81 SOD {22:34:42.81} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     233015685
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0858.fits
SUN_POSTN:        58.09d {+03h 52m 22s}  +20.20d {+20d 12' 16"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.05d {+16h 28m 13s}  -26.57d {-26d 33' 55"}
MOON_DIST:        37.34 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:38:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.603d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81282.81 SOD {22:34:42.81} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     233015685
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0858.fits
SUN_POSTN:        58.09d {+03h 52m 22s}  +20.20d {+20d 12' 16"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.06d {+16h 28m 13s}  -26.57d {-26d 33' 56"}
MOON_DIST:        37.34 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:42:26 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81388.84 SOD {22:36:28.84} UT,   964.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.518
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00312047000msufc0964.fits
SUN_POSTN:        58.10d {+03h 52m 23s}  +20.21d {+20d 12' 18"}
SUN_DIST:        132.93 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.09d {+16h 28m 22s}  -26.57d {-26d 34' 11"}
MOON_DIST:        37.32 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:42:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
POINT_ROLL:      120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81388.84 SOD {22:36:28.84} UT,   964.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.518
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        578 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1537 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00312047000msufc0964.fits
SUN_POSTN:        58.10d {+03h 52m 23s}  +20.21d {+20d 12' 18"}
SUN_DIST:        132.94 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.10d {+16h 28m 23s}  -26.57d {-26d 34' 13"}
MOON_DIST:        37.32 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:43:58 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81388.84 SOD {22:36:28.84} UT,   964.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     233015791
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0964.fits
SUN_POSTN:        58.10d {+03h 52m 23s}  +20.21d {+20d 12' 19"}
SUN_DIST:        132.94 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.11d {+16h 28m 25s}  -26.57d {-26d 34' 17"}
MOON_DIST:        37.31 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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:     Tue 20 May 08 22:44:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     312047,   Seg_Num: 0
POINT_RA:        280.203d {+18h 40m 49s} (J2000)
POINT_DEC:       -55.009d {-55d 00' 31"} (J2000)
ROLL:            120.604d
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  81388.84 SOD {22:36:28.84} UT,   964.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     233015791
X_OFFSET:        739 [pixels]
Y_OFFSET:        897 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       1057
BINNING_INDEX:   1
IM_URL:          sw00312047000msuni0964.fits
SUN_POSTN:        58.10d {+03h 52m 23s}  +20.21d {+20d 12' 19"}
SUN_DIST:        132.94 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.11d {+16h 28m 26s}  -26.57d {-26d 34' 18"}
MOON_DIST:        37.31 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.63,-20.48 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      276.87,-31.81 [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 #7753
D. Grupe (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), K. M. McLean (GSFC/UMD), J. P. Osborne (U Leicester), D. M. Palmer (LANL), D. Perez (U Leicester), T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU), M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 22:20:24 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080520 (trigger=312047). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 280.192, -55.004 which is
```
   RA(J2000)  =  18h 40m 46s
   Dec(J2000) = -55d 00' 13"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks with a duration of about 15 sec. The peak count rate was ~700 counts/sec (15-350 keV), at ~2 sec after the trigger.
The XRT began observing the field at 22:22:04.3 UT, 99.5 seconds after the BAT trigger. Using promptly downlinked data we find a bright uncatalogued X-ray source. The position, astrometrically enhanced by aligning promptly available UVOT field source positions to the USNO-B1 catalogue, is RA,Dec = 280.19337, -54.99181 (degrees) which is equivalent to:
```
RA  (J2000.0) = 18 40 46.41
DEC (J2000.0) = -54 59 30.5
```
with an uncertainty of 2.8 arcsec (radius, 90% containment). This position is 44.0 arcsec from the BAT position, inside the BAT error circle.
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 106 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
RA  (J2000.0) =  18:40:46.41
Dec (J2000.0) = -54:59:31.1
```
with an estimated uncertainty of 0.6 arcsec (90%, radius). The estimated magnitude is white = 19.8 +/- 0.1 mag. No correction has been made for Galactic extinction.
Burst Advocate for this burst is D. Grupe (grupe 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 May 08 22:51:24 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     312047,   Seg_Num: 0
GRB_RA:          280.1933d {+18h 40m 46.39s} (J2000),
                 280.3663d {+18h 41m 27.91s} (current),
                 279.1606d {+18h 36m 38.54s} (1950)
GRB_DEC:         -54.9919d {-54d 59' 30.8"} (J2000),
                 -54.9836d {-54d 59' 00.8"} (current),
                 -55.0387d {-55d 02' 19.3"} (1950)
GRB_ERROR:       0.4 [arcsec radius, statistical only]
GRB_MAG:         19.79 +/- 0.10 [mag]
FILTER:          10, White
IMG_START_DATE:  14606 TJD;   141 DOY;   08/05/20
IMG_START_TIME:  80531.00 SOD {22:22:11.00} UT,   106.2 [sec] since BAT Trigger Time
SUN_POSTN:        58.10d {+03h 52m 24s}  +20.21d {+20d 12' 23"}
SUN_DIST:        132.95 [deg]   Sun_angle= 9.2 [hr] (West of Sun)
MOON_POSTN:      247.17d {+16h 28m 42s}  -26.58d {-26d 34' 46"}
MOON_DIST:        37.26 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      340.64,-20.47 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      276.86,-31.80 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN Circular #7754
Dirk Grupe reports on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 080520 (trigger=312047; Grupe et al., GCN Circ 7753) on 2008-May-20 at 22:22:04.3 UT, 99.5 seconds after the BAT trigger.
The 0.3-10 keV X-ray light curve of the first two orbits displays a single decay with a slope alpha=1.04+/-0.07.
The spectrum of the Photon Counting data of the first two orbits can be well fitted by an absorbed single powerlaw model with a photon index Gamma = 2.12 +/- 0.20 and a column density consistent with the Galactic value of 6.48e20 cm-2
If the underlying powerlaw decay continues as is, we predict an XRT count rate of 1e-3 counts/s at T+24 hours or 5e-14 ergs/s/cm2 and at T+48 hours 4e-4 counts/s or 2e-14 ergs/s/cm2.
This circular is an official product of the Swift-XRT team.
GCN Circular #7755
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 497 s of overlapping XRT Photon Counting mode and UVOT data for GRB 080520, 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 = 280.19385, -54.99160 which is equivalent to:
```
RA (J2000): 18h 40m 46.52s
Dec (J2000): -54d 59' 29.8"
```
with an uncertainty of 1.9 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 #7756
A. Rossi, R. Filgas (Tautenburg), T. Kruehler, J. Greiner (MPE Garching), S. Klose (Tautenburg), A. Kupcu-Yoldas, A. Yoldas, and G. Szokoly (Eoetvoes Univ. Budapest and MPE) report on behalf of the GROND team:
We observed the field of GRB 080520 observed by SWIFT (D. Grupe et al. GCN 7753) simultaneously in grizJHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPI/ESO telescope at La Silla (Chile). Observations started at 01:19 UT, about 2.9 hrs after the GRB. At this time, the GRB location was becoming visible at 20 degrees above horizon. Observations were performed at relatively high airmass and under challenging sky conditions with cirrus and a bright moon.
The afterglow candidate detected by UVOT, reported by D.Grupe et al. (GCN 7753) is detected in g'r'i'z' J , implying a redshift smaller than 3.5.
We estimate a rough magnitude of i'=21.38 +/-0.4 at 3.25 hrs after the GRB, calibrated against USNO-B field stars. We stop observations due to bad sky conditions.
GCN Circular #7757
Pall Jakobsson (U. Hertfordshire), Johan P. U. Fynbo, Daniele Malesani, Jens Hjorth and Bo Milvang-Jensen (DARK, NBI) report on behalf of a larger collaboration:
Using FORS2 on the Very Large Telescope, we have obtained 3*30 min spectra (grism 300V) of the optical afterglow of GRB 080520 (Grupe et al., GCN 7753). The acquisition image shows it to have R = 23.0 +/- 0.5 on May 21.235 (7.3 hours post burst).
A firm upper limit of z < 2.4 can be placed on the redshift of GRB 080520 from the lack of Ly-alpha forest lines in the spectrum of the afterglow. This is consistent with the GROND observations (Rossi et al., GCN 7756).
The combined spectrum shows an emission line, presumably corresponding to [O II] 3727 at z = 1.545. At this redshift we also find the Mg II doublet (2796,2803) and Mg I (2852).
We thank the Paranal staff for excellent support, especially Yuri Beletsky and Patricia Guajardo.
GCN Circular #7758
S.R. Oates (MSSL/UCL) and D. Grupe (PSU) report on behalf of the Swift/UVOT team
The Swift/UVOT began settled observations of the field of GRB 080520, 105s after the BAT trigger (Grupe et al., GCN 7753). We detect the afterglow in the white, v filters at the position:
```
RA(J2000.0)  =  18:40:46.30
DEC(J2000.0) = -54:59:31.0
```
with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence). This position is consistent with the UVOT enhanced XRT position (Goad et al., GCN 7755).
UVOT magnitudes and 3 sigma upper limits are reported below for the single and coadded images:
```
Filter    Tstart(s)  Tstop   Expo(s)   Magnitude/3sigUL
-----------------------------------------------------
white       105      204    98       19.59 +/- 0.12
white       858      958    98       20.58 +/- 0.28
v           211      610    400      20.26 +/- 0.38
v           964      1299   330      19.96 +/- 0.45
b           691      6273   216      > 20.92
u           666      6068   197	     > 20.60
w1          641      5862   236      > 20.33
m2          617      7079   418      > 20.38
w2          720      6684   216      > 20.25
-----------------------------------------------------
```
These magnitudes are not corrected for the Galactic extinction corresponding to a reddening of E{B-V} = 0.08 mag (Schlegel et al. 1998). The photometry is on the UVOT flight system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #7761
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Grupe (PSU), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080520 (trigger #312047) (Grupe, et al., GCN Circ. 7753). The BAT ground-calculated position is RA, Dec = 280.179, -54.964 deg which is
```
   RA(J2000)  =  18h 40m 42.9s 
   Dec(J2000) = -54d 57' 51.2" 
```
with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a single peak starting at T_zero and ending at ~T+3 sec. T90 (15-350 keV) is 2.8 +- 0.7 sec (estimated error including systematics).
The time-averaged spectrum from T-0.3 to T+2.8 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.90 +- 0.51. The fluence in the 15-150 keV band is 5.5 +- 1.4 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T-0.31 sec in the 15-150 keV band is 0.5 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/312047/BA/
We note that the fluence ratio in a simple power-law fit between the 25-50 keV band and the 50-100 keV band is 1.88. This fluence ratio is larger than 1.32 which can be achieved in the Band function of alpha=-1.0, beta=-2.5, and Epeak=30 keV. Thus, preliminary analysis shows that Epeak of the burst is very likely around or below 30 keV. Therefore the burst can be classified as an X-ray flash (e.g. Sakamoto et al. ApJ, 679, 570).
GCN Circular #7771
D. Malesani (DARK), P. Jakobsson (Univ. Hertfordshire), J. P. U. Fynbo, J. Hjorth, B. Milvang-Jensen (DARK), report on behalf of a larger collaboration:
We further inspected our images and spectra (Jakobsson et al., GCN 7757) of the afterglow of GRB 080520 (Grupe et al., GCN 7753). A faint extension is visible in our images (seeing 0.7") underlying the afterglow emission, which may be due to a relatively bright host galaxy. This is consistent with the 2D trace of the spectrum, which reveals the proposed [O II] line to be also spatially extended.
Using the relations by Kennicutt (1998, ARA&A, 36, 189), the flux of the [O II] line (not corrected for extinction) corresponds to a star formation rate (SFR) of approximately 15 M_Sun/yr.
GCN Report 137.1
GCN_Report 137.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_137_1.pdf by D. Grupe at PSU titled: "Final Swift Observations of GRB 080520"
GCN Circular #8490
Aquib Moin (Curtin Institute of Radio Astronomy / Australia Telescope National Facility), Steven Tingay (Curtin Institute of Radio Astronomy), Chris Phillips (Australia Telescope National Facility), Gregory Taylor (University of New Mexico), Mark Wieringa (Australia Telescope National Facility) and Ralph Martin (Perth Observatory) report:
We observed the BAT refined position of the GRB 080520 (GCN 7761) at 4.8 GHz with the Australia Telescope Compact Array (ATCA) on June 01, 2008 between 08:41:15 UT and 09:45:25 UT.
We did not detect a radio source at the BAT position of the GRB 080520 (GCN 7761). The radio flux density at the GRB position is 0.297 +/- 0.217 mJy at 4.8 GHz (1-sigma).
The Australia Telescope Compact Array (/ Parkes telescope / Mopra telescope / Long Baseline Array) is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.
See field image at:
http://cira.ivec.org/dokuwiki/doku.php/grb/grb_080520_field_image

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Jochen Greiner, last update: 07-Nov-2008 [Disclaimer]