Gamma-ray Burst 101117B

(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:     Wed 17 Nov 10 19:13:37 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     438675,   Seg_Num: 0
GRB_RA:          172.909d {+11h 31m 38s} (J2000),
                 173.025d {+11h 32m 06s} (current),
                 172.382d {+11h 29m 32s} (1950)
GRB_DEC:         -72.662d {-72d 39' 41"} (J2000),
                 -72.722d {-72d 43' 18"} (current),
                 -72.386d {-72d 23' 07"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1202 [cnts]    Image_Peak=92 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   65     E_range: 15-50 keV
BKG_INTEN:       25638 [cnts]
BKG_TIME:        69193.62 SOD {19:13:13.62} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15517 TJD;   321 DOY;   10/11/17
GRB_TIME:        69203.92 SOD {19:13:23.92} UT
GRB_PHI:         -112.22 [deg]
GRB_THETA:        31.44 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.37 [sigma]
IMAGE_SIGNIF:    7.66 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +1  -2  +0  +0 -45  +0 
SUN_POSTN:       232.99d {+15h 31m 57s}  -19.09d {-19d 05' 37"}
SUN_DIST:         63.07 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.31d {+00h 29m 14s}   +8.75d {+08d 44' 59"}
MOON_DIST:       115.45 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.72 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      229.47,-62.93 [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 = 173.15,-20.12 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:14:49 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.880d {+11h 31m 31s} (J2000)
POINT_DEC:       -72.671d {-72d 40' 14"} (J2000)
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69280.90 SOD {19:14:40.90} UT,   77.0 [sec] since BAT Trigger Time
COUNTS:          10    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:     Wed 17 Nov 10 19:17:14 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     438675,   Seg_Num: 0
GRB_RA:          172.909d {+11h 31m 38s} (J2000),
                 173.025d {+11h 32m 06s} (current),
                 172.382d {+11h 29m 32s} (1950)
GRB_DEC:         -72.662d {-72d 39' 41"} (J2000),
                 -72.722d {-72d 43' 18"} (current),
                 -72.386d {-72d 23' 07"} (1950)
GRB_DATE:        15517 TJD;   321 DOY;   10/11/17
GRB_TIME:        69203.92 SOD {19:13:23.92} UT
TRIGGER_INDEX:   65
GRB_PHI:         -112.22 [deg]
GRB_THETA:        31.44 [deg]
DELTA_TIME:      -70.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.37 [sigma]
IMAGE_SIGNIF:    7.66 [sigma]
LC_URL:          sw00438675000msb.lc
SUN_POSTN:       232.99d {+15h 31m 57s}  -19.09d {-19d 05' 39"}
SUN_DIST:         63.07 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.34d {+00h 29m 21s}   +8.76d {+08d 45' 41"}
MOON_DIST:       115.46 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.72 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      229.47,-62.93 [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 = 173.15,-20.12 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:18:47 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     438675,   Seg_Num: 0
GRB_RA:          173.0025d {+11h 32m 00.59s} (J2000),
                 173.1184d {+11h 32m 28.41s} (current),
                 172.4738d {+11h 29m 53.70s} (1950)
GRB_DEC:         -72.6631d {-72d 39' 47.1"} (J2000),
                 -72.7232d {-72d 43' 23.5"} (current),
                 -72.3869d {-72d 23' 12.9"} (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:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69294.00 SOD {19:14:54.00} UT,   90.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       232.99d {+15h 31m 58s}  -19.09d {-19d 05' 40"}
SUN_DIST:         63.05 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.35d {+00h 29m 23s}   +8.77d {+08d 45' 59"}
MOON_DIST:       115.47 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      297.02,-10.71 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.51,-62.90 [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:     Wed 17 Nov 10 19:18:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.880d {+11h 31m 31s} (J2000)
POINT_DEC:       -72.671d {-72d 40' 14"} (J2000)
POINT_ROLL:      66.754d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69286.09 SOD {19:14:46.09} UT,   82.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.961
N_STARS:         190
X_OFFSET:        549 [pixels]
Y_OFFSET:        462 [pixels]
X_MAX:           1508 [pixels]
Y_MAX:           1421 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00438675000msufc0082.fits
SUN_POSTN:       232.99d {+15h 31m 58s}  -19.09d {-19d 05' 40"}
SUN_DIST:         63.08 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.35d {+00h 29m 24s}   +8.77d {+08d 46' 01"}
MOON_DIST:       115.45 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:19:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.880d {+11h 31m 31s} (J2000)
POINT_DEC:       -72.671d {-72d 40' 14"} (J2000)
POINT_ROLL:      66.754d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69286.09 SOD {19:14:46.09} UT,   82.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.961
N_STARS:         190
X_OFFSET:        549 [pixels]
Y_OFFSET:        462 [pixels]
X_MAX:           1508 [pixels]
Y_MAX:           1421 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00438675000msufc0082.fits
SUN_POSTN:       232.99d {+15h 31m 58s}  -19.09d {-19d 05' 40"}
SUN_DIST:         63.08 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.35d {+00h 29m 25s}   +8.77d {+08d 46' 06"}
MOON_DIST:       115.45 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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:     Wed 17 Nov 10 19:20:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.880d {+11h 31m 31s} (J2000)
POINT_DEC:       -72.671d {-72d 40' 14"} (J2000)
ROLL:            66.754d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69286.09 SOD {19:14:46.09} UT,   82.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     311714092
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0089.fits
SUN_POSTN:       232.99d {+15h 31m 58s}  -19.09d {-19d 05' 41"}
SUN_DIST:         63.08 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.36d {+00h 29m 26s}   +8.77d {+08d 46' 18"}
MOON_DIST:       115.46 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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:     Wed 17 Nov 10 19:20:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.880d {+11h 31m 31s} (J2000)
POINT_DEC:       -72.671d {-72d 40' 14"} (J2000)
ROLL:            66.754d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69286.09 SOD {19:14:46.09} UT,   82.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     311714092
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0089.fits
SUN_POSTN:       232.99d {+15h 31m 58s}  -19.09d {-19d 05' 41"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.36d {+00h 29m 27s}   +8.77d {+08d 46' 21"}
MOON_DIST:       115.46 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.99,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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 #11411
C. W. Wolf (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), S. Campana (INAF-OAB), N. Gehrels (NASA/GSFC), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), W.B Landsman (GSFC), V. Mangano (INAF-IASFPA), C. B. Markwardt (NASA/GSFC) and P. T. O'Brien (U Leicester) report on behalf of the Swift Team:
At 19:13:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 101117B (trigger=438675). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 172.909, -72.662 which is
```
   RA(J2000) = 11h 31m 38s
   Dec(J2000) = -72d 39' 41"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a two-spike structure with a duration of about 6 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~3 sec after the trigger.
The XRT began observing the field at 19:14:40.9 UT, 77.0 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 173.00251, -72.66317 which is equivalent to:
```
   RA(J2000)  = 11h 32m 0.60s
   Dec(J2000) = -72d 39' 47.4"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 100 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 (1.33 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 2.2 (+2.09/-1.81) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the white filter starting 82 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7' x 2.7' sub-image covers 100% of the XRT error circle. The estimated 3-sigma upper limit is white > 20.4 mag. No correction has been made for the expected Galactic extinction corresponding to a reddening of E_{B-V} = 0.38 mag. Photometry is on the UVOT photometry system of Poole et al. (2008).
Burst Advocate for this burst is C. W. Wolf (cwolf AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:27:59 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.872d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.673d {-72d 40' 23"} (J2000)
POINT_ROLL:      66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69499.61 SOD {19:18:19.61} UT,   295.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.831
N_STARS:         190
X_OFFSET:        309 [pixels]
Y_OFFSET:        222 [pixels]
X_MAX:           1748 [pixels]
Y_MAX:           1661 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00438675000msufc0295.fits
SUN_POSTN:       233.00d {+15h 31m 59s}  -19.10d {-19d 05' 45"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.42d {+00h 29m 41s}   +8.80d {+08d 47' 47"}
MOON_DIST:       115.47 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:28:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.872d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.673d {-72d 40' 23"} (J2000)
POINT_ROLL:      66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69499.61 SOD {19:18:19.61} UT,   295.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.831
N_STARS:         190
X_OFFSET:        309 [pixels]
Y_OFFSET:        222 [pixels]
X_MAX:           1748 [pixels]
Y_MAX:           1661 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00438675000msufc0295.fits
SUN_POSTN:       233.00d {+15h 31m 59s}  -19.10d {-19d 05' 45"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.42d {+00h 29m 41s}   +8.80d {+08d 47' 50"}
MOON_DIST:       115.47 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:29:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.872d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.673d {-72d 40' 23"} (J2000)
ROLL:            66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69499.61 SOD {19:18:19.61} UT,   295.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     311714305
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0302.fits
SUN_POSTN:       233.00d {+15h 31m 59s}  -19.10d {-19d 05' 46"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.43d {+00h 29m 43s}   +8.80d {+08d 48' 03"}
MOON_DIST:       115.48 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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:     Wed 17 Nov 10 19:29:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.872d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.673d {-72d 40' 23"} (J2000)
ROLL:            66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69499.61 SOD {19:18:19.61} UT,   295.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     311714305
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0302.fits
SUN_POSTN:       233.00d {+15h 31m 59s}  -19.10d {-19d 05' 46"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.43d {+00h 29m 44s}   +8.80d {+08d 48' 06"}
MOON_DIST:       115.48 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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:     Wed 17 Nov 10 19:29:29 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     438675,   Seg_Num: 0
GRB_RA:          173.0032d {+11h 32m 00.76s} (J2000),
                 173.1191d {+11h 32m 28.58s} (current),
                 172.4745d {+11h 29m 53.87s} (1950)
GRB_DEC:         -72.6627d {-72d 39' 45.7"} (J2000),
                 -72.7228d {-72d 43' 22.1"} (current),
                 -72.3865d {-72d 23' 11.5"} (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:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  69294.00 SOD {19:14:54.00} UT,   90.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       233.00d {+15h 31m 59s}  -19.10d {-19d 05' 46"}
SUN_DIST:         63.05 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.43d {+00h 29m 43s}   +8.80d {+08d 48' 04"}
MOON_DIST:       115.50 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      297.02,-10.71 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.51,-62.90 [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:     Wed 17 Nov 10 19:35:25 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.871d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.674d {-72d 40' 24"} (J2000)
POINT_ROLL:      66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  70079.86 SOD {19:27:59.86} UT,   875.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.732
N_STARS:         190
X_OFFSET:        309 [pixels]
Y_OFFSET:        222 [pixels]
X_MAX:           1748 [pixels]
Y_MAX:           1661 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00438675000msufc0875.fits
SUN_POSTN:       233.00d {+15h 32m 00s}  -19.10d {-19d 05' 50"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.48d {+00h 29m 55s}   +8.82d {+08d 49' 13"}
MOON_DIST:       115.49 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:35:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.871d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.674d {-72d 40' 24"} (J2000)
POINT_ROLL:      66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  70079.86 SOD {19:27:59.86} UT,   875.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.732
N_STARS:         190
X_OFFSET:        309 [pixels]
Y_OFFSET:        222 [pixels]
X_MAX:           1748 [pixels]
Y_MAX:           1661 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw00438675000msufc0875.fits
SUN_POSTN:       233.00d {+15h 32m 00s}  -19.10d {-19d 05' 50"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.48d {+00h 29m 55s}   +8.82d {+08d 49' 17"}
MOON_DIST:       115.49 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 17 Nov 10 19:37:24 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.871d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.674d {-72d 40' 24"} (J2000)
ROLL:            66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  70079.86 SOD {19:27:59.86} UT,   875.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     311714886
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0882.fits
SUN_POSTN:       233.00d {+15h 32m 01s}  -19.10d {-19d 05' 51"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.49d {+00h 29m 58s}   +8.83d {+08d 49' 36"}
MOON_DIST:       115.50 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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:     Wed 17 Nov 10 19:37:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     438675,   Seg_Num: 0
POINT_RA:        172.871d {+11h 31m 29s} (J2000)
POINT_DEC:       -72.674d {-72d 40' 24"} (J2000)
ROLL:            66.763d
IMG_START_DATE:  15517 TJD;   321 DOY;   10/11/17
IMG_START_TIME:  70079.86 SOD {19:27:59.86} UT,   875.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     311714886
X_OFFSET:        868 [pixels]
Y_OFFSET:        781 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1028
Y_GRB_POS:       941
BINNING_INDEX:   1
IM_URL:          sw00438675000msuni0882.fits
SUN_POSTN:       233.00d {+15h 32m 01s}  -19.10d {-19d 05' 51"}
SUN_DIST:         63.09 [deg]   Sun_angle= 4.0 [hr] (West of Sun)
MOON_POSTN:        7.50d {+00h 29m 59s}   +8.83d {+08d 49' 39"}
MOON_DIST:       115.50 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      296.98,-10.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.48,-62.94 [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 #11412
Stephen Holland (CRESST/USRA/GSFC) reports, on behalf of the UVOT Team
The Swift/UVOT source list has an uncatalogued source at the location of the XRT afterglow (Wolf et al. 2010, GCNC 1141). Preliminary photometry indicates an approximate white magnitude of 18.2.
GCN Circular #11413
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 1061 s of XRT Photon Counting mode data and 1 UVOT images for GRB 101117B, 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 = 173.00136, -72.66293 which is equivalent to:
```
RA (J2000): 11h 32m 0.33s
Dec (J2000): -72d 39' 46.5"
```
with an uncertainty of 1.7 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 #11414
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), J. Tueller (GSFC), T. N. Ukwatta (GWU), C. W. Wolf (PSU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we report further analysis of BAT GRB 101117B (trigger #438675) (Wolf, et al., GCN Circ. 11411). The BAT ground-calculated position is RA, Dec = 172.991, -72.651 deg which is
```
   RA(J2000)  =  11h 31m 57.8s 
   Dec(J2000) = -72d 39' 04.7" 
```
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%.
The mask-weighted light curve shows two overlapping peaks starting at ~T-0.2 sec, peaking at ~T+1.0 sec, and roughly exponentially decaying out to ~T+40 sec. There is possible emission (at the 2-sigma c.l.) from around T+150 to T+220 sec. T90 (15-350 keV) is 5.2 +- 1.8 sec (estimated error including systematics).
The time-averaged spectrum from T-0.1 to T+8.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.50 +- 0.09. The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.74 sec in the 15-150 keV band is 4.5 +- 0.3 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/438675/BA/
This burst was called the "B" burst to avoid possible confusion with the earlier published XRF 101117B event by the MAXI team (GCN Circ 11410).
GCN Circular #11417
C. A. Wolf (PSU) and D. Grupe (PSU) report on behalf of the Swift-XRT team:
We have analyzed 15.7 ks of XRT data for GRB 101117B (Wolf et al. GCN Circ. 11411), from 86 s to 63.0 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode.
The light curve can be modeled with an initial power-law decay with an index of alpha=0.76 (+0.08, -0.09), followed by a break at T+1239 s to an alpha of 1.26 (+0.10, -0.09).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.23 (+/-0.11). The best-fitting absorption column is 3.18 (+/-0.43) x 10^21 cm^-2, in excess of the Galactic value of 1.33 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 5.7 x 10^-11 (10.5 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 1.26, the count rate at T+24 hours will be 2.19 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.25 x 10^-13 (2.30 x 10^-13) erg cm^-2 s^-1. The count rate at T+48 hours will be 0.89 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.07 x 10^-14 (9.35 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00438675.
This circular is an official product of the Swift-XRT team.
GCN Circular #11420
S. T. Holland (CRESST/GSFC/USRA) and C. W. Wolf (PSU) report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 101117B starting 63 s after the BAT trigger (Wolf, et al., 2010, GCN Circ. 11411). Settled observations started at 82 s. We detect the optical afterglow (Holland, 2010, GCN Circ. 11412) in the U, B, and white filters. The refined UVOT position is
```
     RA (J2000)  11:32:00.54  =  173.00225 (deg)
    Dec (J2000) -72:39:45.9   =  -72.66275 (deg)
```
with an estimated uncertainty of 0.43 arcsec (radius, 90% confidence, statistical + systematic). This is 1.16 arcsec northwest of the UVOT-enhanced XRT position (Goad, et al., 2010, GCN Circ. 11413).
Preliminary magnitudes, and 3-sigma upper limits for detecting a source in the finding charts and in the co-added images, are
```
Filter      T_start   T_stop    Exp(s)      Mag   Err
-----------------------------------------------------------
white (fc)       82      232       147     17.81 0.08 
    u (fc)      295      545       246     18.68 0.15


    v           626      646        20    >17.9
    b           551      571        20     18.22 0.27
    u           700     1325        59    >19.1
 uvw1           675     1300        78    >19.3
 uvm2           825     1275        58    >18.7   
 uvw2           601     1051        58    >19.0
white           575      595        20     19.20 0.34
-----------------------------------------------------------
```
The quoted magnitudes and upper limits have not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 0.38 mag (Schlegel, et al., 1998, ApJS, 500, 525). All photometry is on the UVOT photometry system described in Poole et al. (2008, MNRAS, 383, 627).
The non-detection in the UVOT uvw1 filter, and the observed UVOT spectral energy distribution at 600 s, is consistent with GRB 101117B having a redshift of approximately z <= 3, although we can not rule out the non-detection in the ultraviolet being due to extinction in the host galaxy. The white light curve exhibits a power-law decay with an index of alpha = -0.8 +/- 0.1 between 82 and 6005 s after the BAT trigger.
GCN Circular #11421
J. Elliott, R. Filgas, J. Greiner, P. Schady and T. Kruehler (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 101117B (Swift trigger 438675; Wolf et al., GCN #11411) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at La Silla Observatory (Chile).
Observations started at 05:15 UT on November 19, 34 hours after the GRB trigger, and have total exposure of 6003 s in g'r'i'z' and 4800 s in JHK. They were performed at an average seeing of 2.0" and at an average airmass of 1.8.
We do not detect a source within the UVOT error circle reported by Holland & Wolf (GCN #11420) down to the following 3 sigma upper limits (all in AB):
g' > 23.7
r' > 23.8
i' > 23.5
z' > 23.3
J > 21.7,
H > 21.2 and
K > 20.4
The given limits are derived based on calibrating the images against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.38 in the direction of the burst (Schlegel et al. 1998).
GCN Report 310.1
GCN_Report 310.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_310_1.pdf by C.A. Wolf at PSU titled: "Final report on Swift Observations of GRB 101117B"

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Jochen Greiner, last update: 08-Jan-2011 [Disclaimer]