Gamma-ray Burst 111117A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:14:28 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     507901,   Seg_Num: 0
GRB_RA:           12.702d {+00h 50m 49s} (J2000),
                  12.861d {+00h 51m 27s} (current),
                  12.037d {+00h 48m 09s} (1950)
GRB_DEC:         +23.021d {+23d 01' 16"} (J2000),
                 +23.086d {+23d 05' 08"} (current),
                 +22.749d {+22d 44' 57"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2955 [cnts]    Image_Peak=237 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       27171 [cnts]
BKG_TIME:        44008.41 SOD {12:13:28.41} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15882 TJD;   321 DOY;   11/11/17
GRB_TIME:        44021.92 SOD {12:13:41.92} UT
GRB_PHI:          63.64 [deg]
GRB_THETA:        24.44 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     28.26 [sigma]
IMAGE_SIGNIF:    12.59 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  +2  +0  +0 +79  +0 
SUN_POSTN:       232.43d {+15h 29m 44s}  -18.96d {-18d 57' 49"}
SUN_DIST:        142.94 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.09d {+08h 48m 22s}  +13.20d {+13d 11' 55"}
MOON_DIST:       110.35 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.74,-39.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       20.81, 16.16 [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 = 133.78,17.06 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:13:57 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      50
TRIGGER_NUM:     343224824     
GRB_RA:           13.150d {+00h 52m 36s} (J2000),
                  13.310d {+00h 53m 14s} (current),
                  12.478d {+00h 49m 55s} (1950)
GRB_DEC:         +26.783d {+26d 46' 60"} (J2000),
                 +26.848d {+26d 50' 52"} (current),
                 +26.512d {+26d 30' 43"} (1950)
GRB_ERROR:       4.83 [deg radius, statistical plus systematic]  
GRB_INTEN:       1176 [cnts/sec]
DATA_SIGNIF:     13.00 [sigma] 
INTEG_TIME:      0.064 [sec]   
GRB_DATE:        15882 TJD;   321 DOY;   11/11/17
GRB_TIME:        44022.03 SOD {12:13:42.03} UT 
GRB_PHI:         120.00 [deg]
GRB_THETA:       10.00 [deg]
DATA_TIME_SCALE: 0.0640 [sec]
HARD_RATIO:      0.30
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:     96%  GRB
2nd_MOST_LIKELY: 3%  Generic Transient
DETECTORS:       1,0,0, 0,0,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       232.43d {+15h 29m 44s}  -18.96d {-18d 57' 49"}
SUN_DIST:        143.26 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
OON_POSTN:      132.09d {+08h 48m 21s}  +13.20d {+13d 12' 01"}
MOON_DIST:       108.36 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      123.25,-36.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       22.81, 19.43 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.
COMMENTS:        This trigger occurred at longitude,latitude = 107.03,-8.53 [deg].

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Thu 17 Nov 11 12:14:16 UT 
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    6408,   Sub_Num: 0
GRB_INTEN:      10.27 [sigma]  
GRB_TIME:       44022.19 SOD {12:13:42.19} UT
GRB_DATE:       15882 TJD;   321 DOY;   11/11/17
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=343224824).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:
+ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2011-11/2011-11-17T12-13-42.0043-26923-23440-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:15:05 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.683d {+00h 50m 44s} (J2000)
POINT_DEC:       +23.013d {+23d 00' 48"} (J2000)
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44098.74 SOD {12:14:58.74} UT,   76.8 [sec] since BAT Trigger Time
COUNTS:          4    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:17:29 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     507901,   Seg_Num: 0
GRB_RA:           12.702d {+00h 50m 49s} (J2000),
                  12.861d {+00h 51m 27s} (current),
                  12.037d {+00h 48m 09s} (1950)
GRB_DEC:         +23.021d {+23d 01' 16"} (J2000),
                 +23.086d {+23d 05' 08"} (current),
                 +22.749d {+22d 44' 57"} (1950)
GRB_DATE:        15882 TJD;   321 DOY;   11/11/17
GRB_TIME:        44021.92 SOD {12:13:41.92} UT
TRIGGER_INDEX:   124
GRB_PHI:          63.64 [deg]
GRB_THETA:        24.44 [deg]
DELTA_TIME:      -70.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     28.26 [sigma]
IMAGE_SIGNIF:    12.59 [sigma]
LC_URL:          sw00507901000msb.lc
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.96d {-18d 57' 51"}
SUN_DIST:        142.94 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.12d {+08h 48m 28s}  +13.19d {+13d 11' 24"}
MOON_DIST:       110.38 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.74,-39.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       20.81, 16.16 [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 = 133.78,17.06 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:19:26 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     507901,   Seg_Num: 0
GRB_RA:           12.6941d {+00h 50m 46.58s} (J2000),
                  12.8525d {+00h 51m 24.59s} (current),
                  12.0284d {+00h 48m 06.82s} (1950)
GRB_DEC:         +23.0108d {+23d 00' 38.8"} (J2000),
                 +23.0753d {+23d 04' 31.0"} (current),
                 +22.7388d {+22d 44' 19.8"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44111.00 SOD {12:15:11.00} UT,   89.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.96d {-18d 57' 52"}
SUN_DIST:        142.93 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.14d {+08h 48m 32s}  +13.18d {+13d 11' 03"}
MOON_DIST:       110.41 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.73,-39.86 [deg] galactic lon,lat of the burst
ECL_COORDS:       20.80, 16.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:20:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 43"} (J2000)
POINT_ROLL:      268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44158.83 SOD {12:15:58.83} UT,   136.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.681
N_STARS:         58
X_OFFSET:        137 [pixels]
Y_OFFSET:        441 [pixels]
X_MAX:           1576 [pixels]
Y_MAX:           1880 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00507901000msufc0136.fits
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.97d {-18d 57' 53"}
SUN_DIST:        142.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.15d {+08h 48m 35s}  +13.18d {+13d 10' 50"}
MOON_DIST:       110.43 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:21:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 43"} (J2000)
POINT_ROLL:      268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44158.83 SOD {12:15:58.83} UT,   136.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.681
N_STARS:         58
X_OFFSET:        137 [pixels]
Y_OFFSET:        441 [pixels]
X_MAX:           1576 [pixels]
Y_MAX:           1880 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00507901000msufc0136.fits
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.97d {-18d 57' 54"}
SUN_DIST:        142.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.15d {+08h 48m 37s}  +13.18d {+13d 10' 43"}
MOON_DIST:       110.44 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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:     Thu 17 Nov 11 12:21:37 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     507901,   Seg_Num: 0
GRB_RA:           12.6925d {+00h 50m 46.20s} (J2000),
                  12.8509d {+00h 51m 24.21s} (current),
                  12.0268d {+00h 48m 06.44s} (1950)
GRB_DEC:         +23.0103d {+23d 00' 37.0"} (J2000),
                 +23.0748d {+23d 04' 29.2"} (current),
                 +22.7383d {+22d 44' 18.0"} (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:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44111.00 SOD {12:15:11.00} UT,   89.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.97d {-18d 57' 54"}
SUN_DIST:        142.93 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.15d {+08h 48m 37s}  +13.18d {+13d 10' 40"}
MOON_DIST:       110.43 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.73,-39.86 [deg] galactic lon,lat of the burst
ECL_COORDS:       20.80, 16.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:22:11 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 43"} (J2000)
ROLL:            268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44158.83 SOD {12:15:58.83} UT,   136.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     343224966
X_OFFSET:        696 [pixels]
Y_OFFSET:        1000 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       856
Y_GRB_POS:       1160
BINNING_INDEX:   1
IM_URL:          sw00507901000msuni0144.fits
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.97d {-18d 57' 54"}
SUN_DIST:        142.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.16d {+08h 48m 38s}  +13.18d {+13d 10' 35"}
MOON_DIST:       110.45 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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:     Thu 17 Nov 11 12:22:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 43"} (J2000)
ROLL:            268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44158.83 SOD {12:15:58.83} UT,   136.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     343224966
X_OFFSET:        696 [pixels]
Y_OFFSET:        1000 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       856
Y_GRB_POS:       1160
BINNING_INDEX:   1
IM_URL:          sw00507901000msuni0144.fits
SUN_POSTN:       232.44d {+15h 29m 45s}  -18.97d {-18d 57' 54"}
SUN_DIST:        142.92 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.16d {+08h 48m 39s}  +13.18d {+13d 10' 32"}
MOON_DIST:       110.45 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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 #12559
V. Mangano (INAF-IASFPA), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), J. R. Cummings (NASA/UMBC), V. D'Elia (ASDC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA), O. M. Littlejohns (U Leicester), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), S. R. Oates (UCL-MSSL), C. Pagani (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), E. Sonbas (GSFC/USRA/Adiyaman Univ.), R. L. C. Starling (U Leicester), C. A. Swenson (PSU) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team:
At 12:13:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111117A (trigger=507901). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 12.702, +23.021 which is
```
   RA(J2000) = 00h 50m 49s
   Dec(J2000) = +23d 01' 16"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 0.6 sec. The peak count rate was ~6140 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 12:14:58.7 UT, 76.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 12.6925, 23.0103 which is equivalent to:
```
   RA(J2000)  = 00h 50m 46.19s
   Dec(J2000) = +23d 00' 36.9"
```
with an uncertainty of 2.6 arcseconds (radius, 90% containment). This location is 50 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 in excess of the Galactic value (3.70 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 3 (+2.73/-2.30) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 136 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is V. Mangano (vanessa AT ifc.inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:31:34 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 42"} (J2000)
POINT_ROLL:      268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44889.38 SOD {12:28:09.38} UT,   867.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.408
N_STARS:         43
X_OFFSET:        137 [pixels]
Y_OFFSET:        441 [pixels]
X_MAX:           1576 [pixels]
Y_MAX:           1880 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00507901000msufc0867.fits
SUN_POSTN:       232.45d {+15h 29m 47s}  -18.97d {-18d 58' 00"}
SUN_DIST:        142.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.24d {+08h 48m 58s}  +13.15d {+13d 08' 57"}
MOON_DIST:       110.53 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:32:00 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 42"} (J2000)
POINT_ROLL:      268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44889.38 SOD {12:28:09.38} UT,   867.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.408
N_STARS:         43
X_OFFSET:        137 [pixels]
Y_OFFSET:        441 [pixels]
X_MAX:           1576 [pixels]
Y_MAX:           1880 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00507901000msufc0867.fits
SUN_POSTN:       232.45d {+15h 29m 47s}  -18.97d {-18d 58' 00"}
SUN_DIST:        142.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.25d {+08h 48m 59s}  +13.15d {+13d 08' 52"}
MOON_DIST:       110.53 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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:     Thu 17 Nov 11 12:32:24 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 42"} (J2000)
ROLL:            268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44889.38 SOD {12:28:09.38} UT,   867.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     343225696
X_OFFSET:        696 [pixels]
Y_OFFSET:        1000 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       856
Y_GRB_POS:       1160
BINNING_INDEX:   1
IM_URL:          sw00507901000msuni0875.fits
SUN_POSTN:       232.45d {+15h 29m 47s}  -18.97d {-18d 58' 00"}
SUN_DIST:        142.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.25d {+08h 49m 00s}  +13.15d {+13d 08' 48"}
MOON_DIST:       110.54 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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:     Thu 17 Nov 11 12:32:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     507901,   Seg_Num: 0
POINT_RA:         12.680d {+00h 50m 43s} (J2000)
POINT_DEC:       +23.012d {+23d 00' 42"} (J2000)
ROLL:            268.614d
IMG_START_DATE:  15882 TJD;   321 DOY;   11/11/17
IMG_START_TIME:  44889.38 SOD {12:28:09.38} UT,   867.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     343225696
X_OFFSET:        696 [pixels]
Y_OFFSET:        1000 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       856
Y_GRB_POS:       1160
BINNING_INDEX:   1
IM_URL:          sw00507901000msuni0875.fits
SUN_POSTN:       232.45d {+15h 29m 47s}  -18.97d {-18d 58' 00"}
SUN_DIST:        142.91 [deg]   Sun_angle= -9.4 [hr] (East of Sun)
MOON_POSTN:      132.25d {+08h 49m 01s}  +13.15d {+13d 08' 45"}
MOON_DIST:       110.54 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      122.72,-39.86 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       20.79, 16.16 [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 notice

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Thu 17 Nov 11 12:38:17 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     343226282     
GRB_RA:           18.500d {+01h 14m 00s} (J2000),
                  18.645d {+01h 14m 35s} (current),
                  17.888d {+01h 11m 33s} (1950)
GRB_DEC:         -17.917d {-17d 54' 59"} (J2000),
                 -17.854d {-17d 51' 13"} (current),
                 -18.181d {-18d 10' 51"} (1950)
GRB_ERROR:       23.85 [deg radius, statistical plus systematic] 
GRB_INTEN:       47 [cnts/sec] 
DATA_SIGNIF:     5.10 [sigma]  
INTEG_TIME:      4.096 [sec]   
GRB_DATE:        15882 TJD;   321 DOY;   11/11/17
GRB_TIME:        45480.76 SOD {12:38:00.76} UT 
GRB_PHI:         101.00 [deg]  
GRB_THETA:        45.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.19
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       1,0,0, 0,0,0, 0,0,0, 0,1,0, 0,0,
SUN_POSTN:       232.45d {+15h 29m 48s}  -18.97d {-18d 58' 04"}
SUN_DIST:        130.41 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      132.30d {+08h 49m 13s}  +13.13d {+13d 07' 46"}
MOON_DIST:       116.21 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      153.56,-79.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        9.72,-23.72 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.
COMMENTS:        This trigger occurred at longitude,latitude = 196.48,-23.65 [deg].

GCN Circular #12560
X.-H. Zhao (YNAO), D. Xu (WIS), J.-R. Mao, J.-M. Bai (YNAO) report:
We observed the field of GRB 111117A (Mangano et al., GCN 12559) at the 2.4m Gao-Mei-Gu telescope (GMG) equipped with YFOSC. The weather was not optimistic but 1x600s R-band and 3x600s z-band images were obtained, starting at 14:11:16 UT, 17 Nov. 2011 (i..e, 1.960 hrs after the burst). No afterglow was detected within the XRT error circle for both filters, to a 3sigma upper limit of R~22.2 mag, calibrated with the USNO B1 catalog.
We thank Gui-Hua He, Jian-Quan He, and Yu-Xin Xin for performing these observations.
GCN Circular #12561
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), V. Mangano (INAF-IASFPA), J. Norris (BSU), D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+395 sec from recent telemetry downlinks, we report further analysis of BAT GRB 111117A (trigger #507901) (Mangano, et al., GCN Circ. 12559). The BAT ground-calculated position is RA, Dec = 12.702, 23.021 deg, which is
```
   RA(J2000)  =   00h 50m 49.9s
   Dec(J2000) =  +23d 00' 11.0"
```
with an uncertainty of arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows two peaks, the first starts at ~T+0.00, peaks at ~T+0.15 and ends at ~T+0.30 sec. The second starts at ~T+0.35, peaks at ~T+0.50, and ends at ~T+0.60 sec. T90 (15-350 keV) is 0.47 +- 0.09 sec (estimated error including systematics).
The spectral lag is 0.6 +/- 2.4 msec using the 100-350 and 25-50 keV bands with 4-ms binning of the raw lightcurves. This clearly indicates a short burst.
The time-averaged spectrum from T-0.016 to T+0.520 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.65 +- 0.22. The fluence in the 15-150 keV band is 1.40 +- 0.18 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.00 sec in the 15-150 keV band is 1.35 +- 0.20 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/507901/BA/
GCN Circular #12562
T. Sakamoto (GSFC/UMBC), N. Gehrels (GSFC), E. Troja (NASA/GSFC/ORAU), J. Norris (BSU), S. D. Barthelmy (GSFC), J. L. Racusin (GSFC), N. Kawai (Tokyo Tech), A. Fruchter (STScI)
The Chandra ToO observation has been approved for GRB 111117A (Mangano et al., GCN Circ. 12559; Sakamoto et al., GCN Circ. 12561). The observation has been tentatively scheduled on November 20 12:48 UT for 20 ksec.
This is the approved ToO program in AO-13 to identify a Swift short GRB afterglow in X-rays by a sub-arcsecond position from Chandra (PI: Sakamoto, #501616). The main goal is to identify the host galaxy of GRB 111117A by the sub-arcsecond X-ray position which is very likely to be able to obtain from the Chandra observation. Therefore, we strongly encourage deep optical observations of the field.
GCN Circular #12563
Michael I. Andersen (DARK), Antonio de Ugarte Postigo (IAA-CSIC and DARK), Giorgos Leloudas (DARK), Johan P. U. Fynbo (DARK) report on behalf of a larger collaboration:
Using ALFOSC on the Nordic Optical Telescope (NOT) we have obtained R-band (6 x 300 s) imaging of the field of the Swift GRB 111117A (Mangano et al., GCN 12559), starting on 2011 November 20:49:50 UT (mean epoch 7.88 hours after the burst trigger). The seeing during the observations was around 0.9".
In a preliminary reduction we detect a source with a magnitude of R=23.1 +/- 0.3 (based on USNO-B1.0 photometry) at the coordinates (J2000.0 +/- 1"):
```
R.A.: 00:50:46.28
Dec.: +23:00:40.3
```
This is formally 3.6" from the XRT position and thus outside the XRTerror circle reported in GCN 12559. However we note that it is within the automatically generated SPER error box (http://www.swift.ac.uk/sper/507901/). We therefore suggest that this object is the host galaxy or afterglow of GRB 111117A.
We are grateful to the NOT observers, Kristian Vida (Konkoly Observatory) and Heidi Korhonen (U. Copenhagen) for obtaining these observations.
GCN Circular #12565
A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/IASFPA), G. Stratta (ASDC), J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), O.M. Littlejohns (U. Leicester) and V. Mangano report on behalf of the Swift-XRT team:
We have analysed 7.0 ks of XRT data for GRB 111117A (Mangano et al. GCN Circ. 12559), from 89 s to 30.1 ks after the BAT trigger. The data comprise 18 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The best available XRT position (using the promptly downlinked event data, the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) is RA, Dec = 12.6926, 23.0109 which is equivalent to:
```
RA (J2000): 00 50 46.22
Dec(J2000): +23 00 39.2
```
with an uncertainty of 2.1 arcsec (radius, 90% confidence).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.33 (+0.14, -0.13).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.2 (+/-0.4). The best-fitting absorption column is 2.2 (+1.1, -1.0) x 10^21 cm^-2, in excess of the Galactic value of 3.7 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 (5.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.2 (+1.1, -1.0) x 10^21 cm^-2
Galactic foreground: 3.7 x 10^20 cm^-2
Excess significance: 3.4 sigma
Photon index:	     2.2 (+/-0.4)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00507901.
This circular is an official product of the Swift-XRT team.
GCN Circular #12566
W. Fong, N. Sanders, D. Milisavljevic and E. Berger (Harvard) report:
We imaged the location of the short GRB 111117A (GCN 12559) with IMACS on the Magellan/Baade 6.5-m telescope starting on 2011 November 18.07 UT (13.5 hrs post-burst) in 1.0" seeing. In a stack of 4x300 sec r-band exposures, we detect an extended source at the edge of the enhanced XRT error circle (GCN 12565) at a position of:
```
RA = 00:50:46.24
Dec = +23:00:41.04
(J2000)
```
with an uncertainty of ~0.5" in each coordinate. This is consistent with the source position reported by Andersen et al. (GCN 12563, R = 23.1 +/- 0.3).
We calculate the extended source to have a magnitude of r = 23.9 +/- 0.15. The fainter magnitude implies that the source reported by Andersen et al. has faded between 7.9 and 13.5 hours post-burst.
GCN Circular #12567
A. Cucchiara (UCSC/UCO Lick) and S. B. Cenko (UC Berkeley) report on behalf of a large collaboration:
On November 18.07 UT we observed the field of the short-hard GRB 111117A (Mangano et al., GCN 12559) with the Gemini-South telescope equipped with the GMOS instrument.
In our 30 minutes co-added image in r' band we clearly detect the source identified by Andersen et al. and Fong et al.(GCN 12563, 12566): this object appear to be elongated in the SW-NE direction, suggesting it is indeed the host of GRB 111117A.
Using several SDSS (DR8) objects in the field we obtain a value of r' = 23.99 +/- 0.11 for this galaxy brightness, consistent with the one reported by the Magellan Telescope.
We thank the Gemini-South staff for performing these observations, in particular Pascale Hibon.
GCN Circular #12568
S. Schmidl, A. Rossi, D. A. Kann, (all TLS Tautenburg) and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 111117A (Swift trigger #507901, Mangano et al., GCN 12559) 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 02:01 UT on November 18, 13.8 hr after the GRB trigger. They were performed at an average seeing of 1".8 and an average airmass of 1.7 .
We detect the afterglow/host candidate that was reported by Andersen et al. (GCN 12563, R = 23.1 +- 0.3), Fong et al. (GCN 12566, r = 23.9 +- 0.15) and Cucchiara et al. (GCN 12567, r' =3D 23.99 =B1 0.11) in the g' and r' band.
Based on the first 75 min of total exposures in g'r'i'z' and 60 min in JHK, we estimate preliminary magnitudes (all in AB system) of
g' = 24.08 +- 0.15,
r' = 24.08 +- 0.16,
i' > 23.9,
z' > 23.4,
J > 21.7,
H > 21.3 and
K > 19.5.
Our r'-band magnitude is in agreement with Fong et al. and Cucchiara et al.
Magnitudes are calibrated against SDSS as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.03 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12569
S. R. Oates (MSSL-UCL) and V. Mangano (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111117A 137 s after the BAT trigger (Mangano et al., GCN Circ. 12559). No optical afterglow consistent with the XRT position (Melandri et al., GCN Circ. 12565) or the optical position (Andersen et al., GCN Circ. 12563 & Fong et al., GCN Circ. 12566) 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

u_FC               137          387          246         >20.4
v                  443         1241           97         >19.3
b                  392         1191          117         >20.0
u                  137         1315          490         >20.7
w1                 493         1290           97         >20.4
m2                 468         1117           78         >19.5
w2                 419         1217           97         >21.5
```
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 #12570
A. Melandri, D. Fugazza, S. Covino (INAF-OAB) and E. Palazzi (INAF- IASFBo) on behalf of a larger collaboration report:
We observed the field of GRB 111117A (Mangano et al. GCN 12559) with the 3.6m TNG equipped with the Dolores camera. A sequence of 6x300s images were acquired starting on Nov 17.801 UT (i.e. ~7 hours after the burst event).
No obvious fading object is detected inside the refined XRT error circle (Melandri et al. GCN 12565), while the extended object previously reported by Andersen et al. (GCN 12563), Fong et al. (GCN 12566), Cucchiara et al. (GCN 12567) and Schmidl et al. (GCN 12568) is clearly visible in our coadded image.
Calibrating against a set of USNO-B1 stars of the field we find R = 23.1 +/- 0.2, consistent with the value found by Andersen et al. (GCN 12563). We caution about the possible fading of this object, as reported by Fong et al. (GCN 12566), because the apparent difference of magnitude could be related to the different calibration system. Since this object is extended also in our image and it does not seem to vary, it is more likely the host galaxy of GRB 111117A.
We thank the TNG staff for their support, in particular Aldo Fiorenzano.
GCN Circular #12571
W. Fong, B. A. Zauderer and E. Berger (Harvard) report:
"We observed the position of the short GRB 111117A (GCN 12559) with the EVLA beginning 2011 November 18.0 UT (11.8 hours post-burst) at a mean frequency of 5.8 GHz. In two hours of observations, we do not detect any radio source within the enhanced XRT position (GCN 12565) down to a 3-sigma limit of ~34 microJy."
GCN Circular #12572
Giorgos Leloudas, Daniele Malesani (DARK) and Dong Xu (WIS) report on behalf of a larger collaboration:
We have continued observing GRB 111117A (Mangano et al., GCN 12559) using ALFOSC on the Nordic Optical Telescope (NOT). In addition, we have made a more careful analysis of the data reported in Andersen et al. (GCN 12563). Our R-band photometry, calibrated to USNO B1, can be summarized in the following table:
```
Stack 			mid-time	R			
5x300 s 		7.93 hr		23.36+-0.15	
5x300 s		 	9.88 hr		23.98+-0.24	
8x300 s 		36.38 hr	23.74+-0.20  
```
If we instead stack all the images obtained during the first night (10x300s, mid-time 8.91 hr after the GRB), we obtain R = 23.81+-0.17.
Based on the NOT observations only, we suggest that there is some evidence of fading (albeit at low significance) between the observations obtained at 7.93 hr and later, indicating that at that time there was some contribution from the GRB afterglow to the underlying host galaxy light.
We are grateful to the NOT observers, Kristian Vida (Konkoly Observatory) and Heidi Korhonen (U. Copenhagen) for obtaining these observations.
GCN Circular #12573
S. Foley (MPE) and P. Jenke (UAH) report on behalf of the Fermi GBM Team:
"At 12:13:42.03 UT on 17 November 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 111117A (trigger 343224824 / 111117510) which was also detected by the Swift/BAT (Mangano et al. 2011, GCN 12559). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 12 degrees. Moreover, this burst was bright enough to result in a Fermi spacecraft autonomous rapid repoint (ARR) maneuver.
The GBM light curve consists of two pulses with a duration (T90) of about 0.5 s (50-300 keV). The time-averaged spectrum from T0-0.128 s to T0+0.384 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.69 (+0.17/- 0.15) and the lower limit on the cutoff energy, parameterized as Epeak, is 370 keV.
The event fluence (10-1000 keV) in this time interval is (6.7 +/- 0.2)E-07 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.128 s in the 10-1000 keV band is 2.8 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #12574
S. Foley (MPE) and P. Jenke (UAH) report on behalf of the Fermi GBM Team:
"At 12:13:42.03 UT on 17 November 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 111117A (trigger 343224824 / 111117510) which was also detected by the Swift/BAT (Mangano et al. 2011, GCN 12559). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 12 degrees. Moreover, this burst was bright enough to result in a Fermi spacecraft autonomous rapid repoint (ARR) maneuver.
The GBM light curve consists of two pulses with a duration (T90) of about 0.5 s (50-300 keV). The time-averaged spectrum from T0-0.128 s to T0+0.384 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.69 (+0.17/- 0.15) and the lower limit on the cutoff energy, parameterized as Epeak, is 370 keV.
The event fluence (10-1000 keV) in this time interval is (6.7 +/- 0.2)E-07 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.128 s in the 10-1000 keV band is 2.8 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #12575
S. Foley (MPE) and P. Jenke (UAH) report on behalf of the Fermi GBM Team:
"At 12:13:42.03 UT on 17 November 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 111117A (trigger 343224824 / 111117510) which was also detected by the Swift/BAT (Mangano et al. 2011, GCN 12559). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 12 degrees. Moreover, this burst was bright enough to result in a Fermi spacecraft autonomous rapid repoint (ARR) maneuver.
The GBM light curve consists of two pulses with a duration (T90) of about 0.5 s (50-300 keV). The time-averaged spectrum from T0-0.128 s to T0+0.384 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.69 (+0.17/- 0.15) and the lower limit on the cutoff energy, parameterized as Epeak, is 370 keV.
The event fluence (10-1000 keV) in this time interval is (6.7 +/- 0.2)E-07 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.128 s in the 10-1000 keV band is 2.8 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #12576
V. Rumyantsev, N. Pit (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed field of the Swift GRB 111117A (Mangano et al. GCN 12559) with AZT-11 telescope of CrAO in R filter between Nov. 17 (UT) 16:11:05 - 17:14:24, i.e. starting ~ 4 h after burst trigger. We took several images of 180 exposure under variable weather conditions and mean seeing (FWHM) of about 2.7". We do not detect any source within XRT position (Melandri et al. GCN 12565). A photometry is based on the USNO B1.0 1130-0013895 star (00:50:46.48 +23:01:28.8) assuming R=16.98:
```
  T0+      Filter,   Exposure, OT,  UpperLimit
(mid, d)               (s)

0.1879   R         22x180       n/d   20.6
```
GCN Circular #12577
S. B. Cenko (UC Berkeley) and A. Cucchiara (UC Santa Cruz / UCO Lick) report on behalf of a larger collaboration:
We obtained a second epoch of imaging of the X-ray afterglow error circle of the short-hard GRB111117A (Mangano et al., GCN 12559) with the Gemini Multi-Object Spectrograph mounted on the 8-m Gemini South telescope. Observations were taken in the r' filter beginning at 1:18 UT on 2011 Nov 20 (~ 2.5 days after the Swift trigger).
The host galaxy candidate (Andersen et al., GCN 12563; Fong et al., GCN 12566) is well detected in our stacked image, and has maintained a constant brightness (within uncertainties) when compared with our first epoch of GMOS imaging (Cucchiara et al., GCN 12567). Using the HOTPANTS image subtraction software package, we have differenced the two images and estimate a limit on the afterglow flux of r' > 25.5 mag at our first epoch (calculated with respect to several SDSS stars in the field).
GCN Circular #12580
T. Sakamoto (GSFC/UMBC), E. Troja (NASA/GSFC/ORAU), N. Gehrels (GSFC), J. Norris (BSU), S. D. Barthelmy (GSFC), J. L. Racusin (GSFC), N. Kawai (Tokyo Tech), A. Fruchter (STScI)
A Chandra ToO observation of GRB 111117A (Mangano et al., GCN Circ. 12559; Sakamoto et al., GCN Circ. 12561) started on November 20 12:39 UT (~3 days after the GRB trigger) for a total of 19.8 ksec. The X-ray afterglow of the burst in the 0.3-8 keV band was detected at a position RA, Dec 12.69286, +23.01108 which is equivalent to:
```
RA (J2000) = 00 50 46.29 
Dec(J2000) = 23 00 39.9
```
The 1-sigma statistical error is 0.09 and 0.15 arcsec on RA and Dec respectively. The systematic error of the Chandra aspect solution is 0.6 arcsec (radius, 90% containment; i.e, http://cxc.harvard.edu/cal/ASPECT/celmon/) which dominates the localization uncertainty. The detection significance is 3.9 sigma (7.8 net source counts and 0.2 estimated background counts) by the ciao wavdetect software.
The Chandra location is consistent with the enhanced XRT error circle (Melandri et al., GCN Circ. 12565) and the reported optical afterglow/host galaxy candidate from the NOT observation (Andersen et al., GCN Circ. 12563). However, we note that the optical candidate reported from the Magellan observation (Fong et al., GCN Circ 12566) is offset by 1.3 arcsec from the Chandra location.
We would like to thank Harvey Tananbaum and the Chandra operation team for rapidly approving and making this observation.
GCN Circular #12586
V.V. Golovnya, L.M. Kizyun (Main Astro Obs, Kyiv) report:
We have undertaken the review of the sky area of GRB 111117A (W. Fong et al. GCN Circ.12566) on astronegatives, collected in Ukrainian NAS Main astronomical observatory plate archive (1976-1996). All the plates with the possible object appearance are digitized using Microtek ScanMaker 9800XL TMA flatbed scanner and have been placed into Golosiiv Plate Archive database DBGPA with open access to them. The list of plates is given in the table:
```
YYYYMMDD TimeUT	--Plates--	Exp.	LimMag	USNOA2 
19860910 231743	GUA040C001009	16.0	15.20	1125-00304111
19860927 221901	GUA040C001012B	14.0	15.20	1125-00304111
19870917 230117	GUA040C001118A	16.0	15.20	1125-00304111
19880821 010032	GUA040C001325A	16.0	13.70	1125-00304597
19911009 205736	GUA040C001853A	15.5	15.20	1125-00304111
Plates-the plate's identifier in GUA040C archives
        of DWA (D/F=400/2000, M=103"/mm) of the Ukrainian NAS 
        Main Astro obs in Kyiv (Marsden's number - 83)[1].
Exp.   - Duration of the maximum exposure (minutes). 
LimMag - Limited V mag, derived in the 10 minutes area around 
       the location given in W. Fong et al. GCN Circ.12566: 
       RA(J2000): 00h 50m 46.24s, Dec(J2000): +23d 00' 41.04"
USNOA2 - Comparison star.
```
The preview images of 11 areas together with the 10x10 min.of arc area from SkyMap can be found in http://gua.db.ukr-vo.org/img/grb/111117A/index.html The images with full resolution are available via e-mail on demand. References: 1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org
GCN Circular #12588
E. Berger, W. Fong (Harvard), T. Sakamoto (GSFC/UMBC), and E. Troja (NASA/GSFC/ORAU) report:
"We re-analyzed the Chandra observation of the short GRB 111117A (Sakamoto et al. GCN 12580) for the purpose of clarifying and refining the astrometry relative to the location of the host galaxy (using an optical image from Magellan/IMACS: Fong et al. GCN 12566). Using 4 objects in common to the Chandra data and the IMACS image (which is itself tied to USNO-B with 0.25" rms) we find a correction to the native Chandra astrometry of:
```
dRA = -0.54+/-0.17"
dDEC = +0.34+/-0.14"
```
substantially improved relative to the 0.6" systematic uncertainty of the native Chandra astrometry (Sakamoto et al. GCN 12580). With this correction, the position of the X-ray counterpart of GRB 111117A is (J2000):
```
RA = 00:50:46.257
DEC = +23:00:40.01
```
with a statistical uncertainty of about 0.13" in each coordinate.
Relative astrometry compared to the centroid of the host galaxy indicates a projected angular offset of 1.0". Although the redshift of the host galaxy is not known at the present, this roughly corresponds to 6-8 kpc at redshifts of z>0.5 (typical of short GRB offsets: Fong et al. 2010, ApJ, 708, 9)."
GCN Circular #12625
D. Xu (WIS) reports on behalf of a larger collaboration:
We re-processed 1x600s R-band and 3x600s z-band images (Zhao et al., GCN 12560), starting 1.960 hrs post-burst, with calibration frames available later on. The R-band non-detection remains unchanged.
However, in the stacked z-band image an optical source was weakly detected, with its position consistent with the NOT position (Andersen et al., GCN 12563), the refined XRT position (Melandri et al., GCN 12565), as well as the refined Chandra position (Berger et al., GCN 12588), and to the magnitude of z=22.9+/-0.3, calibrated with nearby SDSS stars. The z-band afterglow faded and was not detected by following GROND observation (Schmidl et al., GCN 12568).
GCN Report 363.1
GCN_Report 363.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_363_1.pdf by V. Mangano at INAF IASF Pa titled: "Final Swift Observations of GRB 111117A"
1205.6774 from 31 May 12
T. Sakamoto et al.: Identifying the Location in the Host Galaxy of Short GRB 111117A with the Chandra Sub-arcsecond Position
D'Avanzo, J. Gorosabel, Y. Jeon, R. Sanchez-Ramirez, M. I. Andersen, J. Bai, S. D. Barthelmy, M. S. Briggs, S. Foley, A. S. Fruchter, J. P. U. Fynbo, N. Gehrels, K. Huang, M. Jang, N. Kawai, H. Korhonen, J. Mao, J. P. Norris, R. D. Preece, J. L. Racusin, C. C. Thone, K. Vida, X. Zhao We present our successful program using Chandra for identifying the X-ray afterglow with sub-arcsecond accuracy for the short GRB 111117A discovered by Swift and Fermi. Thanks to our rapid target of opportunity request, Chandra clearly detected the X-ray afterglow, whereas no optical afterglow was found in deep optical observations. Instead, we clearly detect the host galaxy in optical and also in near-infrared bands. We found that the best fit photometric redshift of the host is $z=1.31_{-0.23}^{+0.46}$ (90% confidence), making it one of the highest redshift short GRBs. Furthermore, we see an offset of $1.0 \pm 0.2$ arcseconds, which corresponds to $8.4 \pm 1.7$ kpc assuming z=1.31, between the host and the afterglow position. We discuss the importance of using Chandra for obtaining sub-arcsecond localization of the afterglow in X-rays for short GRBs to study GRB environments in great detail.
1205.7075 from 1 Jun 12
R. Margutti et al.: The Afterglow and Environment of the Short GRB111117A
We present multi-wavelength observations of the afterglow of the short GRB111117A, and follow-up observations of its host galaxy. From rapid optical and radio observations we place limits of r \gtrsim 25.5 mag at \deltat \approx 0.55 d and F_nu(5.8 GHz) < 18 \muJy at \deltat \approx 0.50 d, respectively. However, using a Chandra observation at t~3.0 d we locate the absolute position of the X-ray afterglow to an accuracy of 0.22" (1 sigma), a factor of about 6 times better than the Swift-XRT position. This allows us to robustly identify the host galaxy and to locate the burst at a projected offset of 1.25 +/- 0.20" from the host centroid. Using optical and near-IR observations of the host galaxy we determine a photometric redshift of z=1.3 (+0.3,-0.2), one of the highest for any short GRB, and leading to a projected physical offset for the burst of 10.5 +/- 1.7 kpc, typical of previous short GRBs. At this redshift, the isotropic gamma-ray energy is E_{gamma,iso} \approx 3\times10^51 erg (rest-frame 23-2300 keV) with a peak energy of E_{pk} \approx 850-2300 keV (rest-frame). In conjunction with the isotropic X-ray energy, GRB111117A appears to follow our recently-reported E_x,iso-E_gamma,iso-E_pk universal scaling. Using the X-ray data along with the optical and radio non-detections we find that for a blastwave kinetic energy of E_{K,iso} \approx E_{gamma,iso}, the circumburst density is n_0 \sim 3x10^(-4)-1 cm^-3 (for a range of epsilon_B=0.001-0.1). Similarly, from the non-detection of a break in the X-ray light curve at t<3 d, we infer a minimum opening angle for the outflow of theta_j> 3-10 degrees (depending on the circumburst density). We conclude that Chandra observations of short GRBs are effective at determining precise positions and robust host galaxy associations in the absence of optical and radio detections.
1707.01452 from 1 Jun 12
Selsing et al: The host galaxy of the short GRB111117A at z=2.211: impact on the short GRB redshift distribution and progenitor channels

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