Gamma-ray Burst 130816A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:47:18 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     566545,   Seg_Num: 0
GRB_RA:          197.167d {+13h 08m 40s} (J2000),
                 197.379d {+13h 09m 31s} (current),
                 196.394d {+13h 05m 34s} (1950)
GRB_DEC:         -58.948d {-58d 56' 51"} (J2000),
                 -59.020d {-59d 01' 12"} (current),
                 -58.681d {-58d 40' 52"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4662 [cnts]    Image_Peak=192 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   138     E_range: 15-50 keV
BKG_INTEN:       31344 [cnts]
BKG_TIME:        6397.08 SOD {01:46:37.08} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16520 TJD;   228 DOY;   13/08/16
GRB_TIME:        6415.70 SOD {01:46:55.70} UT
GRB_PHI:          56.80 [deg]
GRB_THETA:        31.92 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     12.84 [sigma]
IMAGE_SIGNIF:    9.35 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  +0  +0  +1 -11  +0 
SUN_POSTN:       145.71d {+09h 42m 49s}  +13.73d {+13d 43' 36"}
SUN_DIST:         83.88 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.66d {+16h 54m 40s}  -19.67d {-19d 40' 12"}
MOON_DIST:        56.11 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.16,  3.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      224.27,-46.51 [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 = 129.21,-15.81 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(27.0<100sec) coincident with the FERMI_GBM event (trignum=398310391).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:46:53 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     398310391
GRB_RA:          195.233d {+13h 00m 56s} (J2000),
                 195.451d {+13h 01m 48s} (current),
                 194.442d {+12h 57m 46s} (1950)
GRB_DEC:         -64.833d {-64d 49' 59"} (J2000),
                 -64.906d {-64d 54' 22"} (current),
                 -64.564d {-64d 33' 50"} (1950)
GRB_ERROR:       19.48 [deg radius, statistical plus systematic]
GRB_INTEN:       141 [cnts/sec]
DATA_SIGNIF:     4.50 [sigma]
INTEG_TIME:      0.256 [sec]
GRB_DATE:        16520 TJD;   228 DOY;   13/08/16
GRB_TIME:        6388.52 SOD {01:46:28.52} UT
GRB_PHI:         264.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 0.2560 [sec]
HARD_RATIO:      0.35
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      79%  GRB
2nd_MOST_LIKELY:  18%  Distant Particles
DETECTORS:       0,0,0, 1,0,0, 1,0,0, 0,0,0, 0,0,
SUN_POSTN:       145.70d {+09h 42m 49s}  +13.73d {+13d 43' 36"}
SUN_DIST:         87.06 [deg]   Sun_angle= -3.3 [hr] (East of Sun)
MOON_POSTN:      253.66d {+16h 54m 38s}  -19.67d {-19d 40' 11"}
MOON_DIST:        58.99 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      303.94, -1.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      228.42,-51.81 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 108.33,-22.40 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:47:07 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     398310391
GRB_RA:          189.940d {+12h 39m 46s} (J2000),
                 190.146d {+12h 40m 35s} (current),
                 189.191d {+12h 36m 46s} (1950)
GRB_DEC:         -66.950d {-66d 57' 00"} (J2000),
                 -67.025d {-67d 01' 28"} (current),
                 -66.675d {-66d 40' 31"} (1950)
GRB_ERROR:       6.62 [deg radius, statistical only]
DATA_SIGNIF:     4.20 [sigma]
DATA_INTERVAL:   0.256 [sec]
GRB_DATE:        16520 TJD;   228 DOY;   13/08/16
GRB_TIME:        6388.52 SOD {01:46:28.52} UT
GRB_PHI:         263.00 [deg]
GRB_THETA:        22.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       145.71d {+09h 42m 49s}  +13.73d {+13d 43' 36"}
SUN_DIST:         87.00 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:      253.66d {+16h 54m 39s}  -19.67d {-19d 40' 12"}
MOON_DIST:        61.72 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      301.79, -4.10 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      227.98,-54.82 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:48:28 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.127d {+13h 08m 30s} (J2000)
POINT_DEC:       -58.929d {-58d 55' 44"} (J2000)
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6503.20 SOD {01:48:23.20} UT,   87.5 [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:     Fri 16 Aug 13 01:50:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     566545,   Seg_Num: 0
GRB_RA:          197.167d {+13h 08m 40s} (J2000),
                 197.379d {+13h 09m 31s} (current),
                 196.394d {+13h 05m 34s} (1950)
GRB_DEC:         -58.948d {-58d 56' 51"} (J2000),
                 -59.020d {-59d 01' 12"} (current),
                 -58.681d {-58d 40' 52"} (1950)
GRB_DATE:        16520 TJD;   228 DOY;   13/08/16
GRB_TIME:        6415.70 SOD {01:46:55.70} UT
TRIGGER_INDEX:   138
GRB_PHI:          56.80 [deg]
GRB_THETA:        31.92 [deg]
DELTA_TIME:      58.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.84 [sigma]
IMAGE_SIGNIF:    9.35 [sigma]
LC_URL:          sw00566545000msb.lc
SUN_POSTN:       145.71d {+09h 42m 50s}  +13.73d {+13d 43' 33"}
SUN_DIST:         83.88 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.70d {+16h 54m 48s}  -19.67d {-19d 40' 17"}
MOON_DIST:        56.13 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.16,  3.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      224.27,-46.51 [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 = 129.21,-15.81 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:52:31 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     566545,   Seg_Num: 0
GRB_RA:          197.1412d {+13h 08m 33.88s} (J2000),
                 197.3531d {+13h 09m 24.75s} (current),
                 196.3681d {+13h 05m 28.34s} (1950)
GRB_DEC:         -58.9450d {-58d 56' 42.0"} (J2000),
                 -59.0174d {-59d 01' 02.7"} (current),
                 -58.6784d {-58d 40' 42.2"} (1950)
GRB_ERROR:       4.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6527.00 SOD {01:48:47.00} UT,   111.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       145.71d {+09h 42m 50s}  +13.73d {+13d 43' 31"}
SUN_DIST:         83.86 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.72d {+16h 54m 53s}  -19.67d {-19d 40' 19"}
MOON_DIST:        56.15 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      224.25,-46.51 [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:     Fri 16 Aug 13 01:53:41 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.126d {+13h 08m 30s} (J2000)
POINT_DEC:       -58.929d {-58d 55' 44"} (J2000)
POINT_ROLL:      310.203d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6506.90 SOD {01:48:26.90} UT,   91.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.403
N_STARS:         190
X_OFFSET:        284 [pixels]
Y_OFFSET:        661 [pixels]
X_MAX:           1243 [pixels]
Y_MAX:           1620 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00566545000msufc0091.fits
SUN_POSTN:       145.71d {+09h 42m 50s}  +13.73d {+13d 43' 31"}
SUN_DIST:         83.85 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.73d {+16h 54m 56s}  -19.67d {-19d 40' 21"}
MOON_DIST:        56.15 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 01:54:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.126d {+13h 08m 30s} (J2000)
POINT_DEC:       -58.929d {-58d 55' 44"} (J2000)
POINT_ROLL:      310.203d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6506.90 SOD {01:48:26.90} UT,   91.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.403
N_STARS:         190
X_OFFSET:        284 [pixels]
Y_OFFSET:        661 [pixels]
X_MAX:           1243 [pixels]
Y_MAX:           1620 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00566545000msufc0091.fits
SUN_POSTN:       145.71d {+09h 42m 50s}  +13.73d {+13d 43' 30"}
SUN_DIST:         83.85 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.74d {+16h 54m 57s}  -19.67d {-19d 40' 22"}
MOON_DIST:        56.16 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 01:56:04 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.126d {+13h 08m 30s} (J2000)
POINT_DEC:       -58.929d {-58d 55' 44"} (J2000)
ROLL:            310.203d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6506.90 SOD {01:48:26.90} UT,   91.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398310517
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0102.fits
SUN_POSTN:       145.71d {+09h 42m 51s}  +13.72d {+13d 43' 29"}
SUN_DIST:         83.85 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.76d {+16h 55m 02s}  -19.67d {-19d 40' 24"}
MOON_DIST:        56.16 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 01:56:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.126d {+13h 08m 30s} (J2000)
POINT_DEC:       -58.929d {-58d 55' 44"} (J2000)
ROLL:            310.203d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6506.90 SOD {01:48:26.90} UT,   91.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398310517
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0102.fits
SUN_POSTN:       145.71d {+09h 42m 51s}  +13.72d {+13d 43' 28"}
SUN_DIST:         83.85 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.76d {+16h 55m 03s}  -19.67d {-19d 40' 25"}
MOON_DIST:        56.17 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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:     Fri 16 Aug 13 02:02:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
POINT_ROLL:      310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6719.17 SOD {01:51:59.17} UT,   303.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.523
N_STARS:         190
X_OFFSET:        44 [pixels]
Y_OFFSET:        421 [pixels]
X_MAX:           1483 [pixels]
Y_MAX:           1860 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00566545000msufc0303.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 23"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.83d {+16h 55m 19s}  -19.68d {-19d 40' 34"}
MOON_DIST:        56.20 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 02:03:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
POINT_ROLL:      310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6719.17 SOD {01:51:59.17} UT,   303.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.523
N_STARS:         190
X_OFFSET:        44 [pixels]
Y_OFFSET:        421 [pixels]
X_MAX:           1483 [pixels]
Y_MAX:           1860 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00566545000msufc0303.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 23"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.83d {+16h 55m 20s}  -19.68d {-19d 40' 35"}
MOON_DIST:        56.20 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 02:03:34 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     566545,   Seg_Num: 0
GRB_RA:          197.1399d {+13h 08m 33.57s} (J2000),
                 197.3518d {+13h 09m 24.44s} (current),
                 196.3668d {+13h 05m 28.03s} (1950)
GRB_DEC:         -58.9450d {-58d 56' 42.0"} (J2000),
                 -59.0174d {-59d 01' 02.7"} (current),
                 -58.6784d {-58d 40' 42.2"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6527.00 SOD {01:48:47.00} UT,   111.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 23"}
SUN_DIST:         83.86 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.84d {+16h 55m 21s}  -19.68d {-19d 40' 35"}
MOON_DIST:        56.20 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      224.25,-46.51 [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:     Fri 16 Aug 13 02:04:28 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
ROLL:            310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6719.17 SOD {01:51:59.17} UT,   303.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     398310730
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0314.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 22"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.85d {+16h 55m 23s}  -19.68d {-19d 40' 36"}
MOON_DIST:        56.21 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 02:04:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
ROLL:            310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  6719.17 SOD {01:51:59.17} UT,   303.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     398310730
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0314.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 22"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.85d {+16h 55m 24s}  -19.68d {-19d 40' 36"}
MOON_DIST:        56.21 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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:     Fri 16 Aug 13 02:07:29 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
POINT_ROLL:      310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  7273.09 SOD {02:01:13.09} UT,   857.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.822
N_STARS:         190
X_OFFSET:        44 [pixels]
Y_OFFSET:        421 [pixels]
X_MAX:           1483 [pixels]
Y_MAX:           1860 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    14
SL_URL:          sw00566545000msufc0857.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 20"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.88d {+16h 55m 31s}  -19.68d {-19d 40' 40"}
MOON_DIST:        56.22 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 Aug 13 02:07:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
POINT_ROLL:      310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  7273.09 SOD {02:01:13.09} UT,   857.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.822
N_STARS:         190
X_OFFSET:        44 [pixels]
Y_OFFSET:        421 [pixels]
X_MAX:           1483 [pixels]
Y_MAX:           1860 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    14
SL_URL:          sw00566545000msufc0857.fits
SUN_POSTN:       145.72d {+09h 42m 52s}  +13.72d {+13d 43' 19"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.88d {+16h 55m 32s}  -19.68d {-19d 40' 41"}
MOON_DIST:        56.22 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 02:09:11 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
ROLL:            310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  7273.09 SOD {02:01:13.09} UT,   857.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398311284
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0868.fits
SUN_POSTN:       145.72d {+09h 42m 53s}  +13.72d {+13d 43' 18"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.90d {+16h 55m 35s}  -19.68d {-19d 40' 43"}
MOON_DIST:        56.23 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 16 Aug 13 02:09:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     566545,   Seg_Num: 0
POINT_RA:        197.122d {+13h 08m 29s} (J2000)
POINT_DEC:       -58.928d {-58d 55' 41"} (J2000)
ROLL:            310.207d
IMG_START_DATE:  16520 TJD;   228 DOY;   13/08/16
IMG_START_TIME:  7273.09 SOD {02:01:13.09} UT,   857.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     398311284
X_OFFSET:        603 [pixels]
Y_OFFSET:        980 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       763
Y_GRB_POS:       1140
BINNING_INDEX:   1
IM_URL:          sw00566545000msuni0868.fits
SUN_POSTN:       145.72d {+09h 42m 53s}  +13.72d {+13d 43' 18"}
SUN_DIST:         83.84 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      253.90d {+16h 55m 36s}  -19.68d {-19d 40' 43"}
MOON_DIST:        56.23 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      305.14,  3.87 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      224.23,-46.50 [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 #15097
S. T. Holland (STScI), P. D'Avanzo (INAF-OAB), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), D. Malesani (DARK/NBI), V. Mangano (PSU), C. B. Markwardt (NASA/GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU/NASA/GSFC) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 01:46:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130816A (trigger=566545). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 197.167, -58.948 which is
```
   RA(J2000) = 13h 08m 40s
   Dec(J2000) = -58d 56' 51"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 10 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 01:48:23.2 UT, 87.5 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 197.1399, -58.9452 which is equivalent to:
```
   RA(J2000)  = 13h 08m 33.59s
   Dec(J2000) = -58d 56' 42.6"
```
with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 51 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (3.87 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 4 (+4.03/-3.22) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 91 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 19.6 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 mag. No correction has been made for the large, but uncertain extinction expected. The crowded field also makes the identification of a new source more difficult.
Burst Advocate for this burst is S. T. Holland (sholland AT stsci.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #15098
S. Covino, D. FUgazza, V. D'Elia report on behalf of the REM team:
We observed the field of GRB 130816A (Holland et al., GCN 15097) simultaneously in the optical and near-infrared with the the 60-cm robotic telescope REM at La Silla Observatory (Chile). The observations started at 01:47:56 UT, about 1 min after the GRB.
We detect a faint source compatible with the XRT position and not present in the 2MASS catalogue with coordinates:
```
RA (J2000) = 13:08:33.80
DEC (J2000) = -58:56:41.2
```
with an estimated uncertainty of +- 0.5 arcsec. Preliminary photometry indicates that the sources was at H = 15.0 +- 0.20 (Vega) about 100 s after the burst.
Further observations are in progress to assess its variability.
GCN Circular #15100
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 1820 s of XRT Photon Counting mode data and 1 UVOT images for GRB 130816A, 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 = 197.14081, -58.94476 which is equivalent to:
```
RA (J2000): 13h 08m 33.79s
Dec (J2000): -58d 56' 41.1"
```
with an uncertainty of 1.8 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 #15101
K. Varela (MPE Garching), D.A. Kann, S. Klose (both TLS Tautenburg), J. Elliott and J. Greiner (both MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 130816A (Holland et al., GCN #15097) simultaneously in g'r'i'z'JHKs with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory (Chile).
Observations started at 01:49 UT on 16 August 2013, 3 min after the GRB trigger. We confirm the presence of the NIR source inside the 2.2 arcsec Swift-XRT error circle (Holland et al.) found by Covino et al. (GCN 15098).
Based on the first 140 sec g'r'i'z and 240 sec JHK exposure, we estimate preliminary magnitudes (all in AB) of
```
g' = 21.8 +/- 0.2 mag,
r' = 20.3 +/- 0.1 mag,
i' = 19.5 +/- 0.1 mag,         
z' = 18.9 +/- 0.1 mag,         
J = 18.0 +/- 0.1 mag,
H = 17.4 +/- 0.1 mag, and      
K = 17.1 +/- 0.1 mag,
```
calibrated against GROND zero points (g'r'i'z') and 2MASS (JHK). Correcting for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.80 in the direction of the burst (Schlegel et al. 1998), the SED is well fit with a powerlaw of slope 0.8, typical of GRB afterglows.
The object rapidly faded (by about 1.5 mag) during the following 40 min., leaving no doubt that this is the afterglow of GRB 130816A.
GCN Circular #15104
G. Fitzpatrick (UCD) and G. Younes (NASA/USRA) report on behalf of the Fermi GBM Team:
At 01:46:28.52 UT on 16 August 2013, the Fermi Gamma-Ray Burst Monitor triggered and located the precursor to GRB130816A (trigger 398310391/130816074) which was detected by the Swift/BAT (Holland et al. 15097, GCN 14527). The GBM on-ground location is consistent with the Swift position.
The GBM light curve consists of the precursor and the main pulse with a duration (T90) of about 32 s (50-300 keV). The time-averaged spectrum from T0+23 s to T0+32 s is adequately fit by a simple power law function with index -1.83 +/- 0.05.
The event fluence (10-1000 keV) in this time interval is (1.3 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+27 s in the 10-1000 keV band is 1.9 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN Circular #15105
T. Sakamoto (AGU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), S. T. Holland (STScI), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (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 130816A (trigger #566545) (Holland , et al., GCN Circ. 15097). The BAT ground-calculated position is RA, Dec = 197.093, -58.996 deg which is
```
   RA(J2000)  =  13h 08m 22.3s
   Dec(J2000) = -58d 59' 46.8"
```
with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 35%.
BAT mask-weighted light curve shows a two-peak structure. The first peak starts around T-28 sec and lasts for about 5 sec. The second peak starts around T-3 sec and ends around T+3 sec. BAT triggered on the second peak and the first peak may be considered as a precursor to the burst. T90 (15-350 keV) is 29.97 +- 1.36 sec (estimated error including systematics).
The time-averaged spectrum from T-28.06 to T+2.56 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.86 +- 0.34. The fluence in the 15-150 keV band is 4.3 +- 1.0 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T-0.04 sec in the 15-150 keV band is 1.5 +- 0.2 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/566545/BA/
GCN Circular #15106
A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), V. Mangano (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester) and S.T. Holland report on behalf of the Swift-XRT team:
We have analysed 2.8 ks of XRT data for GRB 130816A (Holland et al. GCN Circ. 15097), from 99 s to 11.2 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 15100).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.62 (+/-0.08).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.1 (+/-0.3). The best-fitting absorption column is 6.2 (+2.0, -1.7) x 10^21 cm^-2, in excess of the Galactic value of 3.9 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.7 x 10^-11 (9.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.2 (+2.0, -1.7) x 10^21 cm^-2
Galactic foreground: 3.9 x 10^21 cm^-2
Excess significance: 2.3 sigma
Photon index:	     2.1 (+/-0.3)
```
If the light curve continues to decay with a power-law decay index of 0.62, the count rate at T+24 hours will be 7.8 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.7 x 10^-13 (7.1 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00566545.
This circular is an official product of the Swift-XRT team.
GCN Circular #15111
S. T. Holland (STScI) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130816A starting 91 s after the BAT trigger (Holland et al. 2013, GCNC 15097). We do not detect any new source consistent with the REM afterglow position (Covino et al. 2013, GCNC 15098) in any of the UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the finding chart (FC) exposures and initial summed exposures are presented below.
```
---------------------------------------------------
Filter       TSTART      TSTOP    Exposure      Mag
---------------------------------------------------
white (FC)       91        241         147    >20.8
    u (FC)      303        554         246    >19.9
---------------------------------------------------
    v           633       1924         156    >19.2
    b           559       1850         136    >20.0
    u           707       1825         117    >19.5
 uvw1           682       1801         117    >19.3
 uvm2           658       1944         151    >19.4
 uvw2           609       1900         156    >19.7
white           584       1875         284    >21.1
---------------------------------------------------
```
The quoted upper limits have not been corrected for the expected extinction due to the Galactic reddening along the line of sight to this burst of E(B-V) = 0.70 mag (Schlafly et al. 2011, ApJS, 737, 103). GRB 130816A was 4 degrees above the Galactic Plane, so this extinction value is highly uncertain.
GCN Report 467.1
GCN_Report 467.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_467_1.pdf by S.T. Holland at STScI titled: "Swift Observations of GRB 130816A"

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Jochen Greiner, last update: 27-Apr-2014 [Disclaimer]