Gamma-ray Burst 141031B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Oct 14 14:57:39 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     617149,   Seg_Num: 0
GRB_RA:          356.932d {+23h 47m 44s} (J2000),
                 357.118d {+23h 48m 28s} (current),
                 356.306d {+23h 45m 13s} (1950)
GRB_DEC:         +41.365d {+41d 21' 56"} (J2000),
                 +41.448d {+41d 26' 53"} (current),
                 +41.088d {+41d 05' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       22180 [cnts]    Image_Peak=428 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   477     E_range: 25-100 keV
BKG_INTEN:       159542 [cnts]
BKG_TIME:        53715.27 SOD {14:55:15.27} UT
BKG_DUR:         64 [sec]
GRB_DATE:        16961 TJD;   304 DOY;   14/10/31
GRB_TIME:        53805.06 SOD {14:56:45.06} UT
GRB_PHI:          -7.64 [deg]
GRB_THETA:        12.09 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.94 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -2  +0  +0 +73  +0 
SUN_POSTN:       215.74d {+14h 22m 57s}  -14.21d {-14d 12' 30"}
SUN_DIST:        136.90 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.92d {+21h 03m 42s}  -11.85d {-11d 50' 55"}
MOON_DIST:        65.41 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.28,-19.94 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       16.78, 38.48 [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 = 140.04,16.87 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Oct 14 14:58:50 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.364d {+41d 21' 51"} (J2000)
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53922.55 SOD {14:58:42.55} UT,   117.5 [sec] since BAT Trigger Time
COUNTS:          2    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:     Fri 31 Oct 14 15:00:37 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     617149,   Seg_Num: 0
GRB_RA:          356.932d {+23h 47m 44s} (J2000),
                 357.118d {+23h 48m 28s} (current),
                 356.306d {+23h 45m 13s} (1950)
GRB_DEC:         +41.365d {+41d 21' 56"} (J2000),
                 +41.448d {+41d 26' 53"} (current),
                 +41.088d {+41d 05' 15"} (1950)
GRB_DATE:        16961 TJD;   304 DOY;   14/10/31
GRB_TIME:        53805.06 SOD {14:56:45.06} UT
TRIGGER_INDEX:   477
GRB_PHI:          -7.64 [deg]
GRB_THETA:        12.09 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.94 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
LC_URL:          sw00617149000msb.lc
SUN_POSTN:       215.74d {+14h 22m 57s}  -14.21d {-14d 12' 32"}
SUN_DIST:        136.90 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.95d {+21h 03m 49s}  -11.84d {-11d 50' 29"}
MOON_DIST:        65.39 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.28,-19.94 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       16.78, 38.48 [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 = 140.04,16.87 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Oct 14 15:01:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.364d {+41d 21' 52"} (J2000)
POINT_ROLL:      297.413d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53924.89 SOD {14:58:44.89} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.922
N_STARS:         72
X_OFFSET:        551 [pixels]
Y_OFFSET:        473 [pixels]
X_MAX:           1510 [pixels]
Y_MAX:           1432 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00617149000msufc0119.fits
SUN_POSTN:       215.74d {+14h 22m 57s}  -14.21d {-14d 12' 33"}
SUN_DIST:        136.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.96d {+21h 03m 51s}  -11.84d {-11d 50' 21"}
MOON_DIST:        65.39 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Oct 14 15:02:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.364d {+41d 21' 52"} (J2000)
POINT_ROLL:      297.413d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53924.89 SOD {14:58:44.89} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.922
N_STARS:         72
X_OFFSET:        551 [pixels]
Y_OFFSET:        473 [pixels]
X_MAX:           1510 [pixels]
Y_MAX:           1432 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00617149000msufc0119.fits
SUN_POSTN:       215.74d {+14h 22m 57s}  -14.21d {-14d 12' 33"}
SUN_DIST:        136.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.97d {+21h 03m 52s}  -11.84d {-11d 50' 16"}
MOON_DIST:        65.39 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:03:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.364d {+41d 21' 52"} (J2000)
ROLL:            297.413d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53924.89 SOD {14:58:44.89} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     436460337
X_OFFSET:        870 [pixels]
Y_OFFSET:        792 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1030
Y_GRB_POS:       952
BINNING_INDEX:   1
IM_URL:          sw00617149000msuni0132.fits
SUN_POSTN:       215.74d {+14h 22m 58s}  -14.21d {-14d 12' 34"}
SUN_DIST:        136.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.98d {+21h 03m 54s}  -11.84d {-11d 50' 08"}
MOON_DIST:        65.38 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:03:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.364d {+41d 21' 52"} (J2000)
ROLL:            297.413d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53924.89 SOD {14:58:44.89} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     436460337
X_OFFSET:        870 [pixels]
Y_OFFSET:        792 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1030
Y_GRB_POS:       952
BINNING_INDEX:   1
IM_URL:          sw00617149000msuni0132.fits
SUN_POSTN:       215.74d {+14h 22m 58s}  -14.21d {-14d 12' 34"}
SUN_DIST:        136.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.98d {+21h 03m 55s}  -11.84d {-11d 50' 05"}
MOON_DIST:        65.38 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:03:27 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     617149,   Seg_Num: 0
GRB_RA:          356.9055d {+23h 47m 37.32s} (J2000),
                 357.0917d {+23h 48m 22.01s} (current),
                 356.2795d {+23h 45m 07.07s} (1950)
GRB_DEC:         +41.3523d {+41d 21' 08.2"} (J2000),
                 +41.4348d {+41d 26' 05.1"} (current),
                 +41.0744d {+41d 04' 27.7"} (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:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53931.00 SOD {14:58:51.00} UT,   125.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       215.74d {+14h 22m 58s}  -14.21d {-14d 12' 34"}
SUN_DIST:        136.89 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      315.98d {+21h 03m 56s}  -11.83d {-11d 50' 04"}
MOON_DIST:        65.35 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.25,-19.94 [deg] galactic lon,lat of the burst
ECL_COORDS:       16.75, 38.48 [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 31 Oct 14 15:08:10 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.363d {+41d 21' 48"} (J2000)
POINT_ROLL:      297.410d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  54082.93 SOD {15:01:22.93} UT,   277.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.554
N_STARS:         118
X_OFFSET:        311 [pixels]
Y_OFFSET:        233 [pixels]
X_MAX:           1750 [pixels]
Y_MAX:           1672 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00617149000msufc0277.fits
SUN_POSTN:       215.74d {+14h 22m 58s}  -14.21d {-14d 12' 38"}
SUN_DIST:        136.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      316.03d {+21h 04m 07s}  -11.82d {-11d 49' 23"}
MOON_DIST:        65.34 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Oct 14 15:08:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.363d {+41d 21' 48"} (J2000)
POINT_ROLL:      297.410d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  54082.93 SOD {15:01:22.93} UT,   277.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.554
N_STARS:         118
X_OFFSET:        311 [pixels]
Y_OFFSET:        233 [pixels]
X_MAX:           1750 [pixels]
Y_MAX:           1672 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00617149000msufc0277.fits
SUN_POSTN:       215.74d {+14h 22m 59s}  -14.21d {-14d 12' 38"}
SUN_DIST:        136.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      316.03d {+21h 04m 07s}  -11.82d {-11d 49' 20"}
MOON_DIST:        65.34 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:09:25 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.363d {+41d 21' 48"} (J2000)
ROLL:            297.410d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  54082.93 SOD {15:01:22.93} UT,   277.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     436460495
X_OFFSET:        870 [pixels]
Y_OFFSET:        792 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1030
Y_GRB_POS:       952
BINNING_INDEX:   1
IM_URL:          sw00617149000msuni0290.fits
SUN_POSTN:       215.74d {+14h 22m 59s}  -14.21d {-14d 12' 39"}
SUN_DIST:        136.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      316.04d {+21h 04m 09s}  -11.82d {-11d 49' 12"}
MOON_DIST:        65.34 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:09:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     617149,   Seg_Num: 0
POINT_RA:        356.952d {+23h 47m 48s} (J2000)
POINT_DEC:       +41.363d {+41d 21' 48"} (J2000)
ROLL:            297.410d
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  54082.93 SOD {15:01:22.93} UT,   277.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     436460495
X_OFFSET:        870 [pixels]
Y_OFFSET:        792 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1030
Y_GRB_POS:       952
BINNING_INDEX:   1
IM_URL:          sw00617149000msuni0290.fits
SUN_POSTN:       215.74d {+14h 22m 59s}  -14.21d {-14d 12' 39"}
SUN_DIST:        136.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      316.04d {+21h 04m 10s}  -11.82d {-11d 49' 10"}
MOON_DIST:        65.33 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.29,-19.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       16.80, 38.48 [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 31 Oct 14 15:09:00 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     617149,   Seg_Num: 0
GRB_RA:          356.9055d {+23h 47m 37.32s} (J2000),
                 357.0917d {+23h 48m 22.01s} (current),
                 356.2795d {+23h 45m 07.07s} (1950)
GRB_DEC:         +41.3519d {+41d 21' 06.8"} (J2000),
                 +41.4344d {+41d 26' 03.6"} (current),
                 +41.0740d {+41d 04' 26.3"} (1950)
GRB_ERROR:       2.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16961 TJD;   304 DOY;   14/10/31
IMG_START_TIME:  53931.00 SOD {14:58:51.00} UT,   125.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       215.74d {+14h 22m 59s}  -14.21d {-14d 12' 39"}
SUN_DIST:        136.89 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      316.04d {+21h 04m 09s}  -11.82d {-11d 49' 16"}
MOON_DIST:        65.31 [deg]
MOON_ILLUM:      56 [%]
GAL_COORDS:      110.25,-19.94 [deg] galactic lon,lat of the burst
ECL_COORDS:       16.75, 38.48 [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 Circular #16998
B.P. Gompertz (U Leicester), J. R. Cummings (NASA/UMBC), V. D'Elia (ASDC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), H. A. Krimm (CRESST/GSFC/USRA), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 14:56:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 141031B (trigger=617149). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 356.932, +41.365 which is
```
   RA(J2000) = 23h 47m 44s
   Dec(J2000) = +41d 21' 56"
```
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 20 sec. The peak count rate was ~500 counts/sec (15-350 keV), at ~5 sec after the trigger.
The XRT began observing the field at 14:58:42.5 UT, 117.5 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 356.9056, 41.3519 which is equivalent to:
```
   RA(J2000)  = 23h 47m 37.33s
   Dec(J2000) = +41d 21' 07.0"
```
with an uncertainty of 2.6 arcseconds (radius, 90% containment). This location is 85 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 1.22 x 10^21 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 119 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 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 0.15.
Burst Advocate for this burst is B.P. Gompertz (bpg6 AT le.ac.uk). 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 #16999
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya, V.Kornilov, D.Kuvshinov, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinsky, I.Zalozhnih, A. Popov Ural Federal University, Yekaterinburg, Kourovka
Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB141031B 33 sec after notice time and 88 sec after trigger time at 2014-10-31 14:58:13 UT in two polarizations. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box (Gompertz et al GCN 16998). The 5-sigma upper limit has been about 16.0 mag
MASTER II robotic telescope located in Kislovodsk was pointed to the GRB141031B 23 sec after notice time and 77 sec after trigger time at 2014-10-31 14:58:03 UT in two polarizations. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 15.5 mag.
The message may be cited.
GCN Circular #17000
D. Xu (DARK/NBI), C.-H. Bai, T.-Z. Yang, A. Esamdin, L. Ma (XAO) report:
We observed the field of GRB 141031B (Gompertz et al., GCN 16998), using the 1m telescope located at Nanshan, Xinjiang, China. We obtained 2x300s and 1x600s R-band images, starting at 16:02:08 UT on 2014-10-31 (i.e., 1.090 hr after the burst).
No optical source is detected at the XRT position (R.A.=23:47:37.24, Dec.=+41:21:07.7, Err. Rad.=2.4"), down to a limiting magnitude of R=20.6 mag.
GCN Circular #17006
J. Gorosabel (IAA-CSIC/UPV-EHU), S. Hellmich (DLR), S. Mottola (DLR), report on behalf of a larger collaboration:
We observed the field of the GRB 141031B (Gompertz et al., GCN 16998) with the 1.23m CAHA telescope in the I-band filter. Observations started on Oct. 31.74693 UT (2.98 hours post burst). No object brighter than I~20.5 (Vega) is detected within the XRT error circle. Further observations are ongoing.
GCN Circular #17007
E. Mazaeva (IKI), A. Khruslov (INASAN), A. Volnova (IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 141031B (Gompertz et al., GCN 16998) with Zeiss-1000 (East) 1m telescope of Tien Shan Astronomical Observatory on Oct., 31 starting on (UT) 15:39:02, i.e. ~0.7 hours after burst trigger. We took several images in R-filter of 600 exposure. In the first image we do not detect any object brighter than R=21.5 in XRT error circle (Gompertz et al., GCN 16998).
Details of the photometry are following:
```
date        UT start   t-T0       Filter  Exp. UL (3 sigma)
                       (mid, days)          (s)
2014-10-31 15:39:02    0.03284    R       600  21.5
```
The photometry is based on nearby SDSS DR9 stars.
GCN Circular #17009
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 712 s of XRT Photon Counting mode data and 1 UVOT images for GRB 141031B, 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 = 356.90499, +41.35253 which is equivalent to:
```
RA (J2000): 23h 47m 37.20s
Dec (J2000): +41d 21' 09.1"
```
with an uncertainty of 1.9 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) 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 #17011
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (LANL) (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 141031B (trigger #617149) (Gompertz, et al., GCN Circ. 16998). The BAT ground-calculated position is RA, Dec = 356.883, 41.355 deg which is
```
    RA(J2000)  =  23h 47m 31.9s
    Dec(J2000) = +41d 21' 19.1"
```
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows one weak FRED peak. T90 (15-350 keV) is 16.0 +- 3.6 sec (estimated error including systematics).
The time-averaged spectrum from T+1.21 to T+18.21 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.36 +- 0.35. The fluence in the 15-150 keV band is 2.5 +- 0.5 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+4.21 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/617149/BA/
GCN Circular #17012
D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME and OISTER collaboration:
We observed the field of GRB 141031B (Gompertz et al., GCNC 16998) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
The observation started on 2014-10-31 15:02:03 (~5.3 min after the burst). We did not find any new point source within the enhanced XRT circle (Osborne et al., GCNC 17009) in all the three bands.
Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration.
```
#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
-----------------------------------------------------
0.04563    16:02:27    6120.0   >22.6  >22.4  >21.3
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #17013
Daniele Malesani (DARK/NBI) and Vania Lorenzi (INAF/TNG) report on behalf of the CIBO collaboration:
We observed the field of GRB 141031B (Gompertz et al., GCN 16998) with the Nordic Optical Telescope (NOT) equipped with StanCam. Observations were carried out in the Johnson R (9x300 s) and SDSS z (6x300 s) filters under moderate weather conditions (1.5" seeing).
No objects are detected in either bands within the refined X-ray position (Goad et al., GCN 17009), down to limiting magnitudes of R = 22.5 (Vega) and z = 21.5 (AB), with mean times 7.93 and 8.48 hr after the GRB (calibration against USNO B1 and SDSS, respectively).
GCN Circular #17014
U.Quadri, L.Strabla and R.Girelli report:
We imaged the field of GRB 141031B detected by SWIFT(trigger 617149) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy (member of ISSP:Italian Supernovae Search Project)
The observations started 2.16 hour after the GRB trigger, at the end of twilight, with our schmidt telescope D=320/400 mm F/D=3.1.
Weather conditions were good.
We did not found any optical counterpart in the error box of the XRTcandidate. (B.P. Gompertz (U Leicester) et al, GCN 16998)
```
Start T0+      End T0+      Vlim
2.16 hour     4.48 hour      18
```
Magnitudes were estimated with the USNO-B1.0 cat. and are not corrected for galactic dust extinction.
The message may be cited.
GCN Circular #17015
V. Mangano (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU) and B.P. Gompertz report on behalf of the Swift-XRT team:
We have analysed 12 ks of XRT data for GRB 141031B (Gompertz et al. GCN Circ. 16998), from 126 s to 51.8 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. 17009).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.84 (+0.09, -0.08).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.8 (+/-0.4). The best-fitting absorption column is 5.5 (+2.5, -2.7) x 10^21 cm^-2, in excess of the Galactic value of 1.2 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.6 x 10^-11 (6.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.5 (+2.5, -2.7) x 10^21 cm^-2
Galactic foreground: 1.2 x 10^21 cm^-2
Excess significance: 2.6 sigma
Photon index:	     1.8 (+/-0.4)
```
If the light curve continues to decay with a power-law decay index of 0.84, the count rate at T+24 hours will be 1.5 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 6.9 x 10^-14 (1.0 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/00617149.
This circular is an official product of the Swift-XRT team.
GCN Circular #17017
S. R. Oates (IAA-CSIC/UCL-MSSL) and B. P. Gompertz (U Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 141031B 120 s after the BAT trigger (Gompertz et al., GCN Circ. 16998). No optical afterglow consistent with the XRT position (Goad et al. GCN Circ. 17009) 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           120          270          147         >21.0
u_FC               278          528          246         >20.3
white              120         6181          580         >21.8
v                  608        11035         1317         >20.6
b                  534         5976          432         >20.9
u                  278         5771          659         >20.9
w1                 658        12348          620         >20.7
m2                 633        11940         1121         >20.9
w2                 584         6386          432         >20.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.14 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #17018
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=C3=A9 A. de Diego (UNAM), Leonid Georgiev (UNAM)= , Jes=C3=BAs Gonz=C3=A1lez (UNAM), Carlos Rom=C3=A1n-Z=C3=BA=C3=B1iga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report:
We observed the field of GRB 141031B (Gompertz, et al., GCN 16998) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=C3=B3mico Nacional on Sierra San Pedro M=C3=A1rtir from 2014/11 1.10 to 2014/11 1.11 UTC (11.34 to 11.75 hours after the BAT trigger), obtaining a total of 0.36 hours exposure in the r, i, and z bands.
For a source within the enhanced Swift-XRT error circle (Goad, et al., GCN 17009), in comparison with the SDSS DR9, we obtain the following upper limits (3-sigma):
```
  r > 22.98
  i > 22.81
  z > 19.91
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron=C3=B3mico Nacional in San Pedro M=C3=A1rtir.
GCN Circular #17029
E. Mazaeva (IKI), A. Volnova (IKI), A. Khruslov (INASAN), A. Kusakin (Fesenkov Astrophysical Institute), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 141031B (Gompertz et al., GCN 16998) with Zeiss-1000 (East) 1m telescope of Tien Shan Astronomical Observatory on Oct., 31 starting on (UT) 15:39:02. Within enhanced XRT error circle (Goad et al., GCN 17009) we do not detect any object either in a single image (Mazaeva et al., GCN 17007) or in combined image of a total exposure of 4800 s. Details of the photometry are following:
```
date       UT start   t-T0       Filter  Exp.   UL (3 sigma)
                      (mid, days)          (s)

2014-10-31 15:39:02   0.03284    R         600  21.5
2014-10-31 15:39:02   0.05837    R       8*600  22.3
```
The photometry is based on following SDSS DR9 stars:
```
SDSS_id             R_Lupton err
J234748,81+411954,3 16.430 0.014
J234749,26+412154,3 16.866 0.014
J234741,02+411920,5 17.452 0.015
```

Back to JG's homepage

Jochen Greiner, last update: 05-Nov-2014 [Disclaimer]