Gamma-ray Burst 131105A

(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:     Tue 05 Nov 13 02:08:25 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     576738,   Seg_Num: 0
GRB_RA:           71.011d {+04h 44m 03s} (J2000),
                  71.046d {+04h 44m 11s} (current),
                  70.888d {+04h 43m 33s} (1950)
GRB_DEC:         -62.981d {-62d 58' 52"} (J2000),
                 -62.956d {-62d 57' 21"} (current),
                 -63.072d {-63d 04' 19"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1773 [image_cnts]
TRIGGER_DUR:     208.000 [sec]   (=3.5 [min])
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7484.76 SOD {02:04:44.76} UT
GRB_PHI:         -96.76 [deg]
GRB_THETA:        41.74 [deg]
SOLN_STATUS:     0x20000013
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.83 [sigma]
MERIT_PARAMS:     +1  +0  +0  +8  +1  +0  +0  +0 +13  +0 
SUN_POSTN:       220.37d {+14h 41m 29s}  -15.68d {-15d 41' 04"}
SUN_DIST:         97.80 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.82d {+16h 07m 17s}  -18.69d {-18d 41' 34"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       15.05,-81.20 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 346.39,20.48 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(9.0<100sec) coincident with the FERMI_GBM event (trignum=405309896).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:05:17 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     405309896
GRB_RA:           94.083d {+06h 16m 20s} (J2000),
                  94.150d {+06h 16m 36s} (current),
                  93.844d {+06h 15m 23s} (1950)
GRB_DEC:         -55.317d {-55d 19' 00"} (J2000),
                 -55.322d {-55d 19' 19"} (current),
                 -55.297d {-55d 17' 50"} (1950)
GRB_ERROR:       27.77 [deg radius, statistical plus systematic]
GRB_INTEN:       121 [cnts/sec]
DATA_SIGNIF:     6.30 [sigma]
INTEG_TIME:      0.512 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         216.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 0.5120 [sec]
HARD_RATIO:      0.98
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,1,0, 1,0,0, 0,0,
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:         95.82 [deg]   Sun_angle= 8.4 [hr] (West of Sun)
MOON_POSTN:      241.79d {+16h 07m 09s}  -18.69d {-18d 41' 22"}
MOON_DIST:       101.05 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      263.84,-26.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      101.82,-78.59 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 88.42,-6.17 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:05:27 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      57
TRIGGER_NUM:     405309896
GRB_RA:           64.950d {+04h 19m 48s} (J2000),
                  65.014d {+04h 20m 03s} (current),
                  64.720d {+04h 18m 53s} (1950)
GRB_DEC:         -58.383d {-58d 22' 59"} (J2000),
                 -58.351d {-58d 21' 02"} (current),
                 -58.502d {-58d 30' 05"} (1950)
GRB_ERROR:       13.12 [deg radius, statistical plus systematic]
GRB_INTEN:       109 [cnts/sec]
DATA_SIGNIF:     11.70 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         227.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.22
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 0,1,0, 1,0,0, 0,0,
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:        103.24 [deg]   Sun_angle= 10.4 [hr] (West of Sun)
MOON_POSTN:      241.79d {+16h 07m 10s}  -18.69d {-18d 41' 23"}
MOON_DIST:       102.91 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      268.84,-42.45 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       23.61,-75.98 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 88.42,-6.17 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:05:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     405309896
GRB_RA:           71.730d {+04h 46m 55s} (J2000),
                  71.795d {+04h 47m 11s} (current),
                  71.495d {+04h 45m 59s} (1950)
GRB_DEC:         -56.870d {-56d 52' 11"} (J2000),
                 -56.846d {-56d 50' 44"} (current),
                 -56.958d {-56d 57' 27"} (1950)
GRB_ERROR:       8.12 [deg radius, statistical only]
DATA_SIGNIF:     13.70 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         223.00 [deg]
GRB_THETA:        37.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:        102.88 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      241.79d {+16h 07m 10s}  -18.69d {-18d 41' 23"}
MOON_DIST:       104.00 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      265.74,-39.30 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       39.86,-77.10 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:05:44 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      68
TRIGGER_NUM:     405309896
GRB_RA:           65.670d {+04h 22m 41s} (J2000),
                  65.757d {+04h 23m 02s} (current),
                  65.356d {+04h 21m 26s} (1950)
GRB_DEC:         -52.170d {-52d 10' 11"} (J2000),
                 -52.138d {-52d 08' 17"} (current),
                 -52.285d {-52d 17' 06"} (1950)
GRB_ERROR:       5.35 [deg radius, statistical only]
DATA_SIGNIF:     13.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         218.00 [deg]
GRB_THETA:        42.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:        108.69 [deg]   Sun_angle= 10.3 [hr] (West of Sun)
MOON_POSTN:      241.79d {+16h 07m 10s}  -18.69d {-18d 41' 24"}
MOON_DIST:       109.09 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      260.47,-43.64 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       38.16,-71.25 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:05:56 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      86
TRIGGER_NUM:     405309896
GRB_RA:           48.733d {+03h 14m 56s} (J2000),
                  48.790d {+03h 15m 10s} (current),
                  48.528d {+03h 14m 07s} (1950)
GRB_DEC:         -64.283d {-64d 16' 59"} (J2000),
                 -64.232d {-64d 13' 56"} (current),
                 -64.467d {-64d 28' 01"} (1950)
GRB_ERROR:       7.68 [deg radius, statistical plus systematic]
GRB_INTEN:       339 [cnts/sec]
DATA_SIGNIF:     18.70 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         238.00 [deg]
GRB_THETA:        45.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.89
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,1,0, 1,0,0, 0,0,
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:         99.82 [deg]   Sun_angle= 11.4 [hr] (West of Sun)
MOON_POSTN:      241.80d {+16h 07m 11s}  -18.69d {-18d 41' 25"}
MOON_DIST:        96.47 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      281.31,-46.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      348.33,-73.01 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 88.42,-6.17 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:06:00 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      90
TRIGGER_NUM:     405309896
GRB_RA:           72.350d {+04h 49m 24s} (J2000),
                  72.359d {+04h 49m 26s} (current),
                  72.321d {+04h 49m 17s} (1950)
GRB_DEC:         -66.500d {-66d 30' 00"} (J2000),
                 -66.477d {-66d 28' 35"} (current),
                 -66.584d {-66d 35' 03"} (1950)
GRB_ERROR:       6.18 [deg radius, statistical plus systematic]
GRB_INTEN:       287 [cnts/sec]
DATA_SIGNIF:     33.60 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         236.98 [deg]
GRB_THETA:        35.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.09
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 0,1,0, 1,0,0, 0,0,
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:         94.48 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      241.80d {+16h 07m 11s}  -18.69d {-18d 41' 25"}
MOON_DIST:        94.46 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      277.54,-36.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      352.39,-82.99 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 88.42,-6.17 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:06:09 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      89
TRIGGER_NUM:     405309896
GRB_RA:           84.810d {+05h 39m 14s} (J2000),
                  84.854d {+05h 39m 25s} (current),
                  84.651d {+05h 38m 36s} (1950)
GRB_DEC:         -60.070d {-60d 04' 11"} (J2000),
                 -60.063d {-60d 03' 46"} (current),
                 -60.096d {-60d 05' 43"} (1950)
GRB_ERROR:       3.25 [deg radius, statistical only]
DATA_SIGNIF:     39.70 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7493.49 SOD {02:04:53.49} UT
GRB_PHI:         224.00 [deg]
GRB_THETA:        30.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       220.37d {+14h 41m 28s}  -15.68d {-15d 41' 02"}
SUN_DIST:         96.23 [deg]   Sun_angle= 9.0 [hr] (West of Sun)
MOON_POSTN:      241.80d {+16h 07m 12s}  -18.69d {-18d 41' 25"}
MOON_DIST:        99.05 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      268.84,-32.19 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       67.90,-83.11 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:09:42 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.952d {+04h 43m 49s} (J2000)
POINT_DEC:       -62.974d {-62d 58' 27"} (J2000)
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7775.69 SOD {02:09:35.69} UT,   290.9 [sec] since BAT Trigger Time
COUNTS:          8    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:     Tue 05 Nov 13 02:11:09 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     576738,   Seg_Num: 0
GRB_RA:           71.011d {+04h 44m 03s} (J2000),
                  71.046d {+04h 44m 11s} (current),
                  70.888d {+04h 43m 33s} (1950)
GRB_DEC:         -62.981d {-62d 58' 52"} (J2000),
                 -62.956d {-62d 57' 21"} (current),
                 -63.072d {-63d 04' 19"} (1950)
GRB_DATE:        16601 TJD;   309 DOY;   13/11/05
GRB_TIME:        7484.76 SOD {02:04:44.76} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -96.76 [deg]
GRB_THETA:        41.74 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     208.000 [sec]   (=3.5 [min])
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.83 [sigma]
LC_URL:          sw00576738000msb.lc
SUN_POSTN:       220.37d {+14h 41m 29s}  -15.69d {-15d 41' 06"}
SUN_DIST:         97.80 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.85d {+16h 07m 24s}  -18.70d {-18d 41' 45"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       15.05,-81.20 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 346.39,20.48 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:12:31 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.952d {+04h 43m 49s} (J2000)
POINT_DEC:       -62.974d {-62d 58' 26"} (J2000)
POINT_ROLL:      150.377d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7779.36 SOD {02:09:39.36} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.420
N_STARS:         90
X_OFFSET:        550 [pixels]
Y_OFFSET:        340 [pixels]
X_MAX:           1509 [pixels]
Y_MAX:           1299 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00576738000msufc0294.fits
SUN_POSTN:       220.37d {+14h 41m 30s}  -15.69d {-15d 41' 07"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.87d {+16h 07m 28s}  -18.70d {-18d 41' 50"}
MOON_DIST:        98.04 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:13:16 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.952d {+04h 43m 49s} (J2000)
POINT_DEC:       -62.974d {-62d 58' 26"} (J2000)
ROLL:            150.377d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7779.36 SOD {02:09:39.36} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     405310190
X_OFFSET:        869 [pixels]
Y_OFFSET:        659 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1029
Y_GRB_POS:       819
BINNING_INDEX:   1
IM_URL:          sw00576738000msuni0306.fits
SUN_POSTN:       220.37d {+14h 41m 30s}  -15.69d {-15d 41' 08"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.87d {+16h 07m 30s}  -18.70d {-18d 41' 53"}
MOON_DIST:        98.04 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.17 [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 05 Nov 13 02:13:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.952d {+04h 43m 49s} (J2000)
POINT_DEC:       -62.974d {-62d 58' 26"} (J2000)
POINT_ROLL:      150.377d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7779.36 SOD {02:09:39.36} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.420
N_STARS:         90
X_OFFSET:        550 [pixels]
Y_OFFSET:        340 [pixels]
X_MAX:           1509 [pixels]
Y_MAX:           1299 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00576738000msufc0294.fits
SUN_POSTN:       220.37d {+14h 41m 30s}  -15.69d {-15d 41' 08"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.87d {+16h 07m 29s}  -18.70d {-18d 41' 52"}
MOON_DIST:        98.04 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.17 [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 05 Nov 13 02:13:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.952d {+04h 43m 49s} (J2000)
POINT_DEC:       -62.974d {-62d 58' 26"} (J2000)
ROLL:            150.377d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7779.36 SOD {02:09:39.36} UT,   294.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     405310190
X_OFFSET:        869 [pixels]
Y_OFFSET:        659 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1029
Y_GRB_POS:       819
BINNING_INDEX:   1
IM_URL:          sw00576738000msuni0306.fits
SUN_POSTN:       220.37d {+14h 41m 30s}  -15.69d {-15d 41' 08"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.88d {+16h 07m 30s}  -18.70d {-18d 41' 54"}
MOON_DIST:        98.04 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.49,-38.31 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:14:09 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     576738,   Seg_Num: 0
GRB_RA:           70.9645d {+04h 43m 51.48s} (J2000),
                  70.9990d {+04h 44m 00.24s} (current),
                  70.8412d {+04h 43m 21.88s} (1950)
GRB_DEC:         -62.9939d {-62d 59' 38.0"} (J2000),
                 -62.9688d {-62d 58' 07.6"} (current),
                 -63.0850d {-63d 05' 05.9"} (1950)
GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7794.00 SOD {02:09:54.00} UT,   309.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       220.37d {+14h 41m 30s}  -15.69d {-15d 41' 08"}
SUN_DIST:         97.80 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      241.88d {+16h 07m 32s}  -18.70d {-18d 41' 56"}
MOON_DIST:        98.02 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.51,-38.30 [deg] galactic lon,lat of the burst
ECL_COORDS:       14.91,-81.18 [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 Circular #15446
J. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), A. Y. Lien (NASA/GSFC/ORAU), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU) and C. A. Swenson (PSU) report on behalf of the Swift Team:
At 02:04:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 131105A (trigger=576738). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 71.011, -62.981 which is
```
   RA(J2000)  =  04h 44m 03s
   Dec(J2000) = -62d 58' 52"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multple peaks with a total duration of about 120 sec. The peak count rate was ~1100 counts/sec (15-350 keV), at ~44 sec after the trigger.
The XRT began observing the field at 02:09:35.6 UT, 290.9 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 70.96452, -62.99394 which is equivalent to:
```
   RA(J2000)  = 04h 43m 51.48s
   Dec(J2000) = -62d 59' 38.2"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 89 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 (2.91 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.2 (+2.11/-1.84) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White 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 5% of the BAT 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 BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is J. R. Cummings (jayc AT milkyway.gsfc.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:     Tue 05 Nov 13 02:33:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.945d {+04h 43m 47s} (J2000)
POINT_DEC:       -62.972d {-62d 58' 17"} (J2000)
POINT_ROLL:      150.384d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  8358.04 SOD {02:19:18.04} UT,   873.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.422
N_STARS:         180
X_OFFSET:        310 [pixels]
Y_OFFSET:        100 [pixels]
X_MAX:           1749 [pixels]
Y_MAX:           1539 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00576738000msufc0873.fits
SUN_POSTN:       220.39d {+14h 41m 33s}  -15.69d {-15d 41' 23"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      242.09d {+16h 08m 21s}  -18.72d {-18d 43' 10"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.48,-38.32 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.16 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 05 Nov 13 02:33:44 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.945d {+04h 43m 47s} (J2000)
POINT_DEC:       -62.972d {-62d 58' 17"} (J2000)
POINT_ROLL:      150.384d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  8358.04 SOD {02:19:18.04} UT,   873.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.422
N_STARS:         180
X_OFFSET:        310 [pixels]
Y_OFFSET:        100 [pixels]
X_MAX:           1749 [pixels]
Y_MAX:           1539 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00576738000msufc0873.fits
SUN_POSTN:       220.39d {+14h 41m 33s}  -15.69d {-15d 41' 23"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      242.09d {+16h 08m 22s}  -18.72d {-18d 43' 11"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.48,-38.32 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.16 [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 05 Nov 13 02:34:01 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     576738,   Seg_Num: 0
GRB_RA:           70.9672d {+04h 43m 52.12s} (J2000),
                  71.0017d {+04h 44m 00.40s} (current),
                  70.8439d {+04h 43m 22.54s} (1950)
GRB_DEC:         -62.9954d {-62d 59' 43.4"} (J2000),
                 -62.9703d {-62d 58' 13.0"} (current),
                 -63.0865d {-63d 05' 11.3"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  7794.00 SOD {02:09:54.00} UT,   309.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       220.39d {+14h 41m 33s}  -15.69d {-15d 41' 23"}
SUN_DIST:         97.80 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      242.09d {+16h 08m 22s}  -18.72d {-18d 43' 12"}
MOON_DIST:        98.01 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.51,-38.30 [deg] galactic lon,lat of the burst
ECL_COORDS:       14.90,-81.19 [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:     Tue 05 Nov 13 02:34:44 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.945d {+04h 43m 47s} (J2000)
POINT_DEC:       -62.972d {-62d 58' 17"} (J2000)
ROLL:            150.384d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  8358.04 SOD {02:19:18.04} UT,   873.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     405310769
X_OFFSET:        869 [pixels]
Y_OFFSET:        659 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1029
Y_GRB_POS:       819
BINNING_INDEX:   1
IM_URL:          sw00576738000msuni0885.fits
SUN_POSTN:       220.39d {+14h 41m 33s}  -15.69d {-15d 41' 24"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      242.10d {+16h 08m 24s}  -18.72d {-18d 43' 15"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.48,-38.32 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.16 [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 05 Nov 13 02:35:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     576738,   Seg_Num: 0
POINT_RA:         70.945d {+04h 43m 47s} (J2000)
POINT_DEC:       -62.972d {-62d 58' 17"} (J2000)
ROLL:            150.384d
IMG_START_DATE:  16601 TJD;   309 DOY;   13/11/05
IMG_START_TIME:  8358.04 SOD {02:19:18.04} UT,   873.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     405310769
X_OFFSET:        869 [pixels]
Y_OFFSET:        659 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1029
Y_GRB_POS:       819
BINNING_INDEX:   1
IM_URL:          sw00576738000msuni0885.fits
SUN_POSTN:       220.39d {+14h 41m 33s}  -15.69d {-15d 41' 24"}
SUN_DIST:         97.82 [deg]   Sun_angle= 10.0 [hr] (West of Sun)
MOON_POSTN:      242.10d {+16h 08m 25s}  -18.72d {-18d 43' 16"}
MOON_DIST:        98.03 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      273.48,-38.32 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       15.00,-81.16 [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 #15447
D. Xu (DARK/NBI), D. Malesani (DARK/NBI), N. R. Tanvir (U. Leicester), T. Kruehler (ESO), report on behalf of a larger collaboration:
We observed the field of GRB 131105A (Cummings et al., GCN 15446) with the acquisition camera of the X-shooter spectrograph at the VLT. The observation was taken around 03:24 UT on November 5, that is 1.3 hr after the GRB. Inside the current XRT error circle (2.0" radius; see http://www.swift.ac.uk/xrt_positions/), we detect a single source at coordinates (J2000):
```
RA = 04:43:52.27
Dec = -62:59:43.7
```
with an uncertainty of <0.5". Its magnitude is R = 22.4 +- 0.1, compared to three nearby bright USNO stars.
At the moment we cannot conclude whether this source is variable or associated to the GRB, but we propose it as a candidate counterpart.
We acknowledge excellent support from the ESO staff in Paranal, in particular Dimitri Gadotti and Roger Wesson.
GCN Circular #15448
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 704 s of XRT Photon Counting mode data and 1 UVOT images for GRB 131105A, 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 = 70.96782, -62.99505 which is equivalent to:
```
RA (J2000): 04h 43m 52.28s
Dec (J2000): -62d 59' 42.2"
```
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 #15449
Klotz A., Turpin D. (IRAP-CNRS-OMP), Gendre B., Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 131105A detected by SWIFT (trigger 576738) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 231s after the GRB trigger (14s after the notice). The elevation of the field increased from 37 degrees above horizon and weather conditions were good.
A first series of 30.0s exposure images was acquired in tracking mode. We do not detect the afterglow candidate of Xu et al. (GCNC 15447) with limiting magnitudes of:
```
t0+231s to t0+261s : Rlim = 18.3
t0+311s to t0+341s : Rlim = 18.3
t0+351s to t0+381s : Rlim = 18.3
t0+391s to t0+421s : Rlim = 18.3
t0+432s to t0+462s : Rlim = 18.3
```
Next series were co added by drizzling to increase the detectivity.
```
t0+ 472s to t0+1131s : Rlim = 19.0
t0+1141s to t0+1658s : Rlim = 19.0
```
Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.
This message may be cited.
GCN Circular #15450
D. Xu, D. Malesani (DARK/NBI), N. Tanvir (U. Leicester), T. Kruehler (ESO), J. Fynbo (DARK/NBI) report on behalf of the X-shooter GRB collaboration:
We have obtained spectroscopic observations of the afterglow of GRB 131105A (Cummings et al., GCN 15446; Xu et al., GCN 15447), beginning at 03:46 UT, approximately 102 minutes post-trigger. We used the ESO VLT equipped with the X-shooter spectrograph, covering the wavelength range 3000-20000 AA.
The exposure time was 8x600 s. In the NIR arm, we detect two emission lines, interpreted as [O III] (5007) and H-alpha at a common redshift z = 1.686. In the spectrum we also detect absorption lines at the same redshift, albeit at low signal-to-noise ratio. Furthermore, we measure significant fading of the source between two sets of acquisition images, confirming that we are seeing afterglow and host light. Hence, we consider z = 1.686 the likely redshift of GRB 131105A. The afterglow appears to be red presumably due to dust extinction.
We acknowledge excellent support from the observing staff at Paranal, in particular Dimitri Gadotti, Roger Wesson, and Claudia Reyes.
GCN Circular #15452
S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 131105A (Swift-BAT trigger 576738: Cummings et al., GCN 15446) triggered Konus-Wind at T0=3D7527.233 s UT (02:05:27.233).
The burst light curve shows multiple peaks in the time interval from ~T0-35 s till ~T0+90 s. The emission is seen up to ~3 MeV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB131105_T07527/
As observed by Konus-Wind, the burst had a fluence of (2.3 =B1 0.2)x10-5 erg/cm2, and a 64-ms peak flux, measured from T0+1.600 s, of (2.0 =B1 0.2)x10-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum (measured from T0 to T0+90.368 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha =3D -0.88 =B1 0.38, the high energy photon index beta =3D -2.33 =B1 0.33, the peak energy Ep =3D 156 =B1 38 keV, chi2 =3D 97/96 dof.
The spectrum near the maximum count rate (measured from T0 to T0+8.448 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha =3D -1.04 =B1 0.27, the high energy photon index beta =3D -2.64 =B1 0.76, the peak energy Ep =3D 174 =B1 41 keV, chi2 =3D 87.9/97 dof.
Assuming the redshift z=3D1.686 (Xu, et al., GCN 15450) and a standard cosmology model with H_0 =3D 70 km/s/Mpc, Omega_M =3D 0.27, and Omega_Lambda =3D 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is (1.7 =B1 0.1)x10^53 erg, the peak luminosity L_iso is (4.0 =B1 0.4)x10^52 erg/s, and the rest-frame peak energy Ep,i =3D (420 =B1 100) keV
All the quoted values are preliminary.
GCN Circular #15454
M. De Pasquale (UCL-MSSL) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131105A 295 s after the BAT trigger (Cummings et al., GCN Circ. 15446). No optical afterglow consistent with the optical position (Xu et al. GCN Circ. 15447) 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           295          444          147         >21.5
white              295         1544          353         >22.0
v                  774         1594           97         >19.3
b                 1152         1520           58         >19.9
u                  848         1495           78         >19.8
w1                 823         1471           78         >19.4
m2                 798         1619           39         >18.4
w2                 750         1570           78         >19.5
```
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 #15455
G. Fitzpatrick (UCD) and P. Jenke (UAH) report on behalf of the Fermi GBM Team:
At 02:04:53.49 UT on 05 November 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 131105A (trigger 405309896/131105087), which was also detected by Swift (Cummings et al., GCN 15446) and Konus-Wind (Golenetskii et al, GCN 15452). The GBM on-ground location is consistent with the Swift/XRT position (Osborne et al., GCN 15448). The angle from the Fermi LAT boresight is 37 degrees.
The GBM light curve consists of a multiple-peak structure with a duration (T90) of about 112 s (50-300 keV). The time-averaged spectrum from T0-3 s to T0+121 s is adequately fit by a Band function with Epeak = 203.9 +/- 31.1 keV, alpha = -1.2 +/- 0.1, and beta = -1.8 +/- 0.1.
The event fluence (10-1000 keV) in this time interval is (2.9 +/- 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+108 s in the 10-1000 keV band is 8.4 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN Circular #15458
J.A. Kennea (PSU), V. Mangano (PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. Maselli (INAF-IASFPA), M.C. Stroh (PSU) and J.R. Cummings report on behalf of the Swift-XRT team:
We have analysed 8.3 ks of XRT data for GRB 131105A (Cummings et al. GCN Circ. 15446), from 276 s to 36.2 ks after the BAT trigger. The data comprise 7 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 15448).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=8.0 (+0.0, -1.5). At T+353 s the decay flattens to an alpha of 0.62 (+/-0.04) before breaking again at T+21.4 ks to a final decay with index alpha=2.3 (+0.9, -0.8).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.22 (+0.16, -0.15). The best-fitting absorption column is 2.2 (+0.5, -0.4) x 10^21 cm^-2, in excess of the Galactic value of 2.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (5.9 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.2 (+0.5, -0.4) x 10^21 cm^-2
Galactic foreground: 2.9 x 10^20 cm^-2
Excess significance: 7.5 sigma
Photon index:	     2.22 (+0.16, -0.15)
```
If the light curve continues to decay with a power-law decay index of 2.3, the count rate at T+24 hours will be 3.4 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.2 x 10^-13 (2.0 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/00576738.
This circular is an official product of the Swift-XRT team.
GCN Circular #15459
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), F. E. Marshall (NASA/GSFC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 131105A (trigger #576738) (Cummings, et al., GCN Circ. 15446). The BAT ground-calculated position is RA, Dec = 70.973, -63.005 deg which is
```
  RA(J2000)  =  04h 43m 53.5s
  Dec(J2000) = -63d 00' 17.7"
```
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 7%.
The mask-weighted light curve shows a multi-peak structure starts at ~T+0 sec and ends at ~T+126 sec. The light curve consists of ~ 5 obvious peaks. T90 (15-350 keV) is 112.3 +- 4.1 sec (estimated error including systematics).
The time-averaged spectrum from T+6.8 to T+125.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.45 +- 0.11. The fluence in the 15-150 keV band is 7.1 +- 0.5 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+116.64 sec in the 15-150 keV band is 3.5 +- 0.6 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/576738/BA/
GCN Report 457.1
GCN_Report 457.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_457_1.pdf by F.E. Marshall at NASA/GSFC titled: "Swift Observations of GRB 131105A"

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Jochen Greiner, last update: 26-Apr-2014 [Disclaimer]