Gamma-ray Burst 130822A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 15:54:41 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     567163,   Seg_Num: 0
GRB_RA:           27.940d {+01h 51m 46s} (J2000),
                  28.112d {+01h 52m 27s} (current),
                  27.307d {+01h 49m 14s} (1950)
GRB_DEC:          -3.219d {-03d 13' 08"} (J2000),
                  -3.152d {-03d 09' 06"} (current),
                  -3.466d {-03d 27' 56"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       317 [cnts]    Image_Peak=49 [image_cnts]
TRIGGER_DUR:     0.032 [sec] 
TRIGGER_INDEX:   10318     E_range: 25-100 keV
BKG_INTEN:       27364 [cnts]
BKG_TIME:        57245.05 SOD {15:54:05.05} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16526 TJD;   234 DOY;   13/08/22
GRB_TIME:        57257.21 SOD {15:54:17.21} UT
GRB_PHI:          18.79 [deg]
GRB_THETA:        19.31 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.64 [sigma]
IMAGE_SIGNIF:    7.43 [sigma]
MERIT_PARAMS:     +1  +0  +0  -5  +2  -2  +0  +0 +55  +0 
SUN_POSTN:       151.82d {+10h 07m 16s}  +11.57d {+11d 34' 17"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.22d {+23h 20m 52s}   -0.09d {-00d 05' 29"}
MOON_DIST:        38.00 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       24.76,-13.75 [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 = 160.03,-18.88 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 15:55:38 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.223d {-03d 13' 20"} (J2000)
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57330.73 SOD {15:55:30.73} UT,   73.5 [sec] since BAT Trigger Time
COUNTS:          4    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    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:     Thu 22 Aug 13 15:58:12 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     567163,   Seg_Num: 0
GRB_RA:           27.940d {+01h 51m 46s} (J2000),
                  28.112d {+01h 52m 27s} (current),
                  27.307d {+01h 49m 14s} (1950)
GRB_DEC:          -3.219d {-03d 13' 08"} (J2000),
                  -3.152d {-03d 09' 06"} (current),
                  -3.466d {-03d 27' 56"} (1950)
GRB_DATE:        16526 TJD;   234 DOY;   13/08/22
GRB_TIME:        57257.27 SOD {15:54:17.27} UT
TRIGGER_INDEX:   10318
GRB_PHI:          18.79 [deg]
GRB_THETA:        19.31 [deg]
DELTA_TIME:      58.00 [sec]
TRIGGER_DUR:     0.032 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.64 [sigma]
IMAGE_SIGNIF:    7.43 [sigma]
LC_URL:          sw00567163000msb.lc
SUN_POSTN:       151.82d {+10h 07m 16s}  +11.57d {+11d 34' 14"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.25d {+23h 21m 00s}   -0.08d {-00d 04' 47"}
MOON_DIST:        37.97 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       24.76,-13.75 [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 = 160.03,-18.88 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 15:58:41 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.222d {-03d 13' 18"} (J2000)
POINT_ROLL:      78.225d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57338.37 SOD {15:55:38.37} UT,   81.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.322
N_STARS:         17
X_OFFSET:        478 [pixels]
Y_OFFSET:        548 [pixels]
X_MAX:           1437 [pixels]
Y_MAX:           1507 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00567163000msufc0081.fits
SUN_POSTN:       151.82d {+10h 07m 16s}  +11.57d {+11d 34' 14"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.25d {+23h 21m 01s}   -0.08d {-00d 04' 41"}
MOON_DIST:        37.96 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.63,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 15:59:30 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.222d {-03d 13' 18"} (J2000)
POINT_ROLL:      78.225d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57338.37 SOD {15:55:38.37} UT,   81.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.322
N_STARS:         17
X_OFFSET:        478 [pixels]
Y_OFFSET:        548 [pixels]
X_MAX:           1437 [pixels]
Y_MAX:           1507 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00567163000msufc0081.fits
SUN_POSTN:       151.82d {+10h 07m 16s}  +11.57d {+11d 34' 13"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.26d {+23h 21m 03s}   -0.08d {-00d 04' 31"}
MOON_DIST:        37.96 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.63,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:00:17 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.222d {-03d 13' 18"} (J2000)
ROLL:            78.225d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57338.37 SOD {15:55:38.37} UT,   81.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398879749
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0092.fits
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 12"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.27d {+23h 21m 04s}   -0.07d {-00d 04' 22"}
MOON_DIST:        37.95 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.63,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:00:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.222d {-03d 13' 18"} (J2000)
ROLL:            78.225d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57338.37 SOD {15:55:38.37} UT,   81.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398879749
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0092.fits
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 12"}
SUN_DIST:        123.63 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.27d {+23h 21m 05s}   -0.07d {-00d 04' 18"}
MOON_DIST:        37.95 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.63,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:00:38 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     567163,   Seg_Num: 0
GRB_RA:           27.9216d {+01h 51m 41.18s} (J2000),
                  28.0944d {+01h 52m 22.65s} (current),
                  27.2886d {+01h 49m 09.26s} (1950)
GRB_DEC:          -3.2083d {-03d 12' 29.8"} (J2000),
                  -3.1413d {-03d 08' 28.5"} (current),
                  -3.4550d {-03d 27' 18.0"} (1950)
GRB_ERROR:       4.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57352.00 SOD {15:55:52.00} UT,   94.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 12"}
SUN_DIST:        123.65 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.27d {+23h 21m 05s}   -0.07d {-00d 04' 17"}
MOON_DIST:        37.93 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.58,-62.08 [deg] galactic lon,lat of the burst
ECL_COORDS:       24.75,-13.73 [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:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 16:05:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
POINT_ROLL:      78.224d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57551.80 SOD {15:59:11.80} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.627
N_STARS:         28
X_OFFSET:        238 [pixels]
Y_OFFSET:        308 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1747 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00567163000msufc0294.fits
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 08"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.31d {+23h 21m 15s}   -0.06d {-00d 03' 22"}
MOON_DIST:        37.91 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 16:05:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
POINT_ROLL:      78.224d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57551.80 SOD {15:59:11.80} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.627
N_STARS:         28
X_OFFSET:        238 [pixels]
Y_OFFSET:        308 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1747 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00567163000msufc0294.fits
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 08"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.32d {+23h 21m 16s}   -0.05d {-00d 03' 17"}
MOON_DIST:        37.90 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:05:47 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     567163,   Seg_Num: 0
GRB_RA:           27.9218d {+01h 51m 41.23s} (J2000),
                  28.0946d {+01h 52m 22.70s} (current),
                  27.2888d {+01h 49m 09.30s} (1950)
GRB_DEC:          -3.2084d {-03d 12' 30.2"} (J2000),
                  -3.1414d {-03d 08' 28.8"} (current),
                  -3.4551d {-03d 27' 18.4"} (1950)
GRB_ERROR:       3.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57352.00 SOD {15:55:52.00} UT,   94.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       151.82d {+10h 07m 17s}  +11.57d {+11d 34' 08"}
SUN_DIST:        123.65 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.32d {+23h 21m 16s}   -0.05d {-00d 03' 15"}
MOON_DIST:        37.88 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.58,-62.08 [deg] galactic lon,lat of the burst
ECL_COORDS:       24.75,-13.73 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 16:06:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
ROLL:            78.224d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57551.80 SOD {15:59:11.80} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     398879962
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0305.fits
SUN_POSTN:       151.82d {+10h 07m 18s}  +11.57d {+11d 34' 07"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.33d {+23h 21m 18s}   -0.05d {-00d 03' 05"}
MOON_DIST:        37.89 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:06:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
ROLL:            78.224d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  57551.80 SOD {15:59:11.80} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     398879962
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0305.fits
SUN_POSTN:       151.82d {+10h 07m 18s}  +11.57d {+11d 34' 07"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.33d {+23h 21m 19s}   -0.05d {-00d 03' 02"}
MOON_DIST:        37.89 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:11:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
POINT_ROLL:      78.223d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  58128.67 SOD {16:08:48.67} UT,   871.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.544
N_STARS:         55
X_OFFSET:        238 [pixels]
Y_OFFSET:        308 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1747 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00567163000msufc0871.fits
SUN_POSTN:       151.83d {+10h 07m 18s}  +11.57d {+11d 34' 03"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.38d {+23h 21m 30s}   -0.03d {-00d 02' 01"}
MOON_DIST:        37.85 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 16:12:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
POINT_ROLL:      78.223d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  58128.67 SOD {16:08:48.67} UT,   871.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.544
N_STARS:         55
X_OFFSET:        238 [pixels]
Y_OFFSET:        308 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1747 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00567163000msufc0871.fits
SUN_POSTN:       151.83d {+10h 07m 18s}  +11.57d {+11d 34' 02"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.38d {+23h 21m 31s}   -0.03d {-00d 01' 56"}
MOON_DIST:        37.84 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #15112
D. Kocevski (NASA/GSFC/ORAU), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), S. T. Holland (STScI), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), V. Mangano (PSU), F. E. Marshall (NASA/GSFC), C. Pagani (U Leicester), K. L. Page (U Leicester), J. L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), R. L. C. Starling (U Leicester) and G. Tagliaferri (INAF-OAB) report on behalf of the Swift Team:
At 15:54:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130822A (trigger=567163). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 27.940, -3.219 which is
```
   RA(J2000) = 01h 51m 46s
   Dec(J2000) = -03d 13' 08"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 0.1 sec. The peak count rate was ~3700 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 15:55:30.7 UT, 73.5 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 27.9218, -3.2085 which is equivalent to:
```
   RA(J2000)  = 01h 51m 41.22s
   Dec(J2000) = -03d 12' 30.6"
```
with an uncertainty of 3.1 arcseconds (radius, 90% containment). This location is 75 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 2.76 x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 294 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is D. Kocevski (daniel.kocevski AT nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 22 Aug 13 16:13:26 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
ROLL:            78.223d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  58128.67 SOD {16:08:48.67} UT,   871.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398880539
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0882.fits
SUN_POSTN:       151.83d {+10h 07m 19s}  +11.57d {+11d 34' 01"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.39d {+23h 21m 33s}   -0.03d {-00d 01' 43"}
MOON_DIST:        37.83 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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:     Thu 22 Aug 13 16:13:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     567163,   Seg_Num: 0
POINT_RA:         27.939d {+01h 51m 45s} (J2000)
POINT_DEC:        -3.220d {-03d 13' 11"} (J2000)
ROLL:            78.223d
IMG_START_DATE:  16526 TJD;   234 DOY;   13/08/22
IMG_START_TIME:  58128.67 SOD {16:08:48.67} UT,   871.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398880539
X_OFFSET:        797 [pixels]
Y_OFFSET:        867 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       957
Y_GRB_POS:       1027
BINNING_INDEX:   1
IM_URL:          sw00567163000msuni0882.fits
SUN_POSTN:       151.83d {+10h 07m 19s}  +11.57d {+11d 34' 01"}
SUN_DIST:        123.64 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      350.39d {+23h 21m 34s}   -0.03d {-00d 01' 38"}
MOON_DIST:        37.83 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      156.62,-62.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       24.76,-13.75 [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 Circular #15114
D. Xu (DARK/NBI), D.-Y. Ren, C. Cao, S.-M. Hu (SDU) report:
We observed the field of GRB 130822A (Kocevski et al., GCN 15112) using the 1m telescope located in Weihai, Shandong, China. Observations started at 17:05:49 UT on 2013-08-22 (i.e., 1.19 hr after the BAT trigger) and 3x500s SDSS r'-band frames were obtained in a cloudy weather.
No optical source is detected within the XRT error circle (Kocevski et al., GCN 15112) in the stacked image down to r'>~20 mag, calibrated with SDSS field.
GCN Circular #15116
T. N. Ukwatta (MSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), D. Kocevski (NASA/GSFC/ORAU), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), (i.e. the Swift-BAT team):
Using the data set from T-60 to T+123 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130822A (trigger #567163) (Kocevski, et al., GCN Circ. 15112). The BAT ground-calculated position is RA, Dec = 27.931, -3.193 deg which is
```
    RA(J2000)  =  01h 51m 43.4s
    Dec(J2000) = -03d 11' 34.0"
```
with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 92%.
The mask-weighted light curve shows a single peak. T90 (15-350 keV) is 0.04 +- 0.01 sec (estimated error including systematics).
The time-averaged spectrum from T-0.004 to T+0.044 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.29. The fluence in the 15-150 keV band is 1.3 +- 0.3 x 10^-08 erg/cm2. The 1-sec peak photon flux measured from T-0.48 sec in the 15-150 keV band is 0.3 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/567163/BA/
GCN Circular #15117
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 465 s of XRT Photon Counting mode data and 1 UVOT images for GRB 130822A, 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 = 27.92181, -3.20865 which is equivalent to:
```
RA (J2000): 01h 51m 41.23s
Dec (J2000): -03d 12' 31.1"
```
with an uncertainty of 2.6 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) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #15118
A. A. Breeveld (UCL-MSSL) and D. Kocevski (NASA/GSFC/ORAU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130822A 81 s after the BAT trigger (Kocevski et al., GCN Circ. 15112). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 15117) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            81          231          147         >20.8
u_FC               295          544          246         >20.7
white               81         1543          392         >21.4
v                  624         1420           97         >19.3
b                  550         1170           58         >20.1
u                  295         1145          265         >20.9
w1                 674         1470           97         >19.7
w2                 600          620           19         >19.4
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #15119
K. Wiersema (Leicester), A. Levan (Warwick), D. Malesani (DARK) report on behalf of a larger collaboration:
We observed the position of short GRB 130822A (Kocevski et al., GCN 15112) using the 4.2m William Herschel Telescope with the ACAM instrument and a Sloan r filter. We do not identify a source in or near the refined XRT error circle (Beardmore et al., GCN 15117) in a dataset of 20x50 seconds exposures (0.365 days after burst), taken under poor weather conditions. An upper limit of r=21.9 is found at the XRT position. We note the presence of a moderately bright galaxy (r=18.15) offset approximately 22" from the GRB location and with a photometric redshift of z=0.1. If associated with would correspond to an offset of 40 kpc.
GCN Circular #15120
A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU), V. Mangano (PSU), M.C. Stroh (PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB) and D. Kocevski report on behalf of the Swift-XRT team:
We have analysed 7.2 ks of XRT data for GRB 130822A (Kocevski et al. GCN Circ. 15112), from 85 s to 41.0 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 15117). The source is fading with alpha >0.5.
If the light curve continues to decay with a power-law decay index of , the count rate at T+24 hours will be 2.8 x 10^-5 count s^-1
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00567163.
This circular is an official product of the Swift-XRT team.
GCN Circular #15121
S. B. Cenko (NASA / GSFC), D. A. Perley (Caltech), A. Cucchiara (UCSC), W. Fong (CfA), and A. J. Levan (U. Warwick) report on behalf of a larger collaboration:
We have imaged the location of the X-ray afterglow (Beardmore et al., GCN 15117) of the short GRB 130822A (Kocevski et al., GCN 15112) with the Gemini Multi-Object Spectrograph on the 8 m Gemini North telescope. We obtained a total integration of 600 s in the i' filter beginning at 12:56 UT on 23 August 2013 (0.88 d after the Swift trigger). We detect no sources within the enhanced XRT error circle. Using nearby point sources from SDSS for calibration, we calculate an upper limit of i' > 24.5 mag at this time.
GCN Circular #15122
W. Fong, B. A. Zauderer and E. Berger (Harvard) report:
"We observed the field of the short-duration GRB 130822A (Kocevski et al., GCN 15112) with the Karl G. Jansky Very Large Array (VLA) beginning on 2013 Aug 23.33 UT (15.9 hr post-burst) at a mean frequency of 5.8 GHz. In 1 hour of observations, we do not detect any radio source within or around the XRT position (Beardmore et al., GCN 15117). We therefore place a 3-sigma limit of ~30 microJy on the radio afterglow of GRB 130822A at 15.9 hr after the burst.
We thank the VLA staff for quickly executing these observations."
GCN Circular #15126
J. Norris (BSU), S. D. Barthelmy (GSFC), T. Sakamoto (AGU), N. Gehrels (GSFC)
We report the spectral lag analysis for GRB 130822A (Kocevski, et al., GCN Circ. 15112) based on the BAT data. Using 1-ms binned light curve, the spectral lag for the 15-25 keV to 50-100 keV bands is 2.6 (+3.5/-3.2) ms. Since the lag value is consistent with zero, we believe this burst belongs to a short burst category. There is no evidence for extended emission.
GCN Circular #15137
A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V. Ayvazian(AAO), Yu. Krugly (IA KhNU), I. Slyusarev (IA KhNU), I. Molotov (KIAM), V. Linkov (ISON), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of Swift GRB 130822A (Kocevski et al., GCN 15112) on Aug., 22 with AS-32 (0.7m) telescope of Abastumani Observatory, SANTEL-400AN (0.4m) telescope of ISON-Kislovodsk observatory, and AZT-8 (0.7m) telescope of Institute of Astronomy, Kharkiv National University. We obtained several unfiltered frames with exposures of 120 s (AS-32), 100 s and 60 s (SANTEL-400AN), and several frames with filter R with exposure of 120 s (AZT-8). Within the enhanced XRT circle (Beardmore et al., GCN 15117) we did not detect any source on stacked images.
The details of the photometry are the following:
```
Telescope t_start, UT  filter exptime,s    t-t0, mid, days    uplim

AZT-8     21:39:21     R      55*120       0.28000            20.6
S-400     22:31:37     None   23*100       0.30332            19.3
AS-32     23:46:59     None   40*120       0.36513            21.9
```
The photometry is based on SDSS stars, R mag (R mag obtained via transformations ugriz in BVRI (Lupton, 2005):
```
SDSS id             R      R_err
J015202.75-031421.9 12.80  0.012
J015134.64-031348.8 13.95  0.013
J015148.69-030854.9 14.62  0.013
```
GCN Circular #15178
K. Wiersema (Leicester), A. Levan (Warwick), S. B. Cenko (NASA/GSFC) and N. Tanvir (Leicester) report on behalf of a larger collaboration:
We acquired spectroscopy of two galaxies close to the afterglow position of short GRB 130822A (Kocevski et al. GCN 15112), these galaxies have low chance coincidence probability values (note that there are no sources found within the XRT error circle, Cenko et al. GCN 15121). These two galaxies, hereafter named G1 and G2, are located at approximate positions (SDSS DR10):
```
G1
RA:   01:51:42.66
Dec: -03:12:25.48

G2
RA:   01:51:41.09
Dec: -03:11:07.47
```
A finder chart showing the locations of these galaxies (Gemini i' band; Cenko et al. GCN 15121) can be found here: http://www.star.le.ac.uk/~kw113/G1G2.png
We acquired spectroscopy with ACAM on the William Herschel Telescope (directly following the photometry observations reported in Wiersema et al. GCN 15119) and GMOS on Gemini-North (starting at 13:35 UT on 2 September 2013). In both cases the slit was aligned such that both galaxies were covered simultaneously by the slit. The ACAM spectrum covers the range 3500-9400, the Gemini spectrum the range 3850-6730 A.
Galaxy G1 shows strong absorption complexes (G band, Mg b triplet, Fe 4668, Ca II) as well as a single, weak, emission line (H beta), at a common redshift z=0.154. Galaxy G2 shows stronger emission lines of H alpha and H beta, as well as absorption complexes (G band, Na I, Mg b triplet) at a common redshift z=0.045. At these redshifts, the offset from the afterglow to galaxy G1 is 58 kiloparsec, and to G2 72 kiloparsec. If the brighter, but somewhat further offset, galaxy G2 is the host galaxy, it would place GRB 130822A within the Advanced LIGO / Virgo horizon.
Redshift z= 0.154 +- 0.001 from host galaxy emission (Hbeta, Halpha, [OIII])
W.-F. Fong et al. 2022, ApJ 940, 56

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