Swift-XRT has observed the field of GRB 091117 about one month after the burst (Cummings et al. GCN 10171). The data set consists of two further observations, 9.7 ks and 9.2 ks, from 32.8 to 34.2 days after the trigger. The data are entirely in Photon Counting (PC) mode. We found that Source #1 (Berger, GCN 10173; D'Elia et al., GCN 10177; Fox, GCN 10179, D'Elia et al., GCN 10181) is...Full Text

"We observed the Swift/BAT localization region for GRB 091117 (Cummings et al., GCN 10171; Sakamoto et al., GCN 10180) with the Chandra X-ray Observatory + ACIS, positioned at the ACIS-S3 aimpoint, in a 20.1 ksec integration with mean epoch Nov 21.85 UT, 4.1 days after the burst trigger. Analysis of these data reveals the presence of nine X-ray sources within and near the BAT localization region...Full Text

Cummings et al., GCN 10171) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2009-11-17 17:44:25.253 UT (=T0). The observed light curve shows a single peak starting at T0 s, ending at T0+1 s with a duration (T90) of about 0.4 seconds. The fluence in 100 - 1000 keV was 1.54 (-0.26/+0.25) x10^-6 erg/cm^2. The 1-s peak flux measured from T0...Full Text

We observed the field of GRB 091117 (Cummings et al. GCN 10171) with the Italian 3.6m TNG telescope, sited in Canary Islands (Spain) with the DOLORES camera in imaging mode on Nov 19.995 UT. Observations were carried out in V, R and I band. We compared our 900 s I-band image with the one obtained in the same band with the 1.5m OSN telescope on Nov 18.9 UT (Casanova et al., GCN 10172). Image subtraction...Full Text

The Swift/UVOT began settled observations of the field of GRB 091117A 96767s (~27 hours) after the BAT trigger (Cummings et al., GCN 10171). The galaxy described by Berger and Mulchaey (GCN 10174) as being a possible host, is clearly seen as an extended object in the UVOT data. There is no evidence of a fading source at either of the two XRT source positions (D'Elia et al., GCN 10177) when...Full Text

"We obtained a second set of optical r-band observations of the BAT error circle of GRB 091117 (GCN 10171) with IMACS on the Magellan/Baade 6.5-m telescope starting on 2009 Nov 20.03 UT. A comparison to our first epoch of Magellan observations (GCN 10174) reveals no variable sources within the BAT error circle or in coincidence with the two XRT sources (GCN 10173,10177,10181) to a limit...Full Text

"We imaged the BAT error circle of the short GRB 091117 (GCN 10171) with the VLA at a frequency of 8.46 GHz starting on 2009 Nov 20.07 UT. In the 1 hour observation only a single source is detected within the BAT error circle, in coincidence with the galaxy near XRT Source #2 (GCN 10177,10178). However, inspection of the NRAO VLA Sky Survey (NVSS) reveals a coincident archival source, indicating...Full Text

We have analysed further 4.0 ks of XRT data for GRB 091117 (Cummings et al. GCN 10171), from 161.3 ks to 172.4 ks after the trigger. The data are entirely in Photon Counting (PC) mode. We found that Source #1 (Berger, GCN 10173; D'Elia et al., GCN 10177; Fox, GCN 10179) is detected with a count rate of (1.9+/-0.9)e-3 cts/s, thus showing some evidence of fading with respect to the first Swift...Full Text

Because of the ground-detected nature of this burst, the usual automated data products are not currently available. ...Full Text

"Analysis of the first 3.85 ks of Swift XRT exposure (D'Elia et al., GCN 10177) on the field of GRB 091117 (Cummings et al., GCN 10171), as reduced via standard XRT pipeline processing, yields a total of 13 photons from Source #1 (Berger, GCN 10173) and 7 photons from Source #2 (D'Elia et al., GCN 10177). The resulting distribution of photon arrival times for Source #1 is inconsistent with a...Full Text

We have imaged the field of GRB 091117 (Cummings et al., GCN 10171) with the Gemini Multi-Object Spectrograph on the 8 m Gemini South telescope beginning at 7:07 UT on 19 November (~ 37 hours after the burst trigger time). Observations were conducted in the Sloan g', r', and i' filters under poor seeing conditions (~ 2" FWHM). We find no new point sources at the location of either candidate X-ray afterglow...Full Text

We have analysed 3.85 ks of XRT data for GRB 091117 (Cummings et al. et al. GCN 10171), from 96765 s to 119.4 ks after the Suzaku trigger. The data are entirely in Photon Counting (PC) mode. Two sources are detected at the edge of the BAT error circle. Source #1: using 722 s of XRT Photon Counting mode data and 1 UVOT images, we find an astrometrically corrected X-ray position (using the XRT-UVOT...Full Text

We obtained spectra of the DSS galaxy coincident with the XRT source (GCN 10173) seen in the Swift observations of the short GRB 091117 (GCN 10171) using GMOS on Gemini-North. A pair of 1800s exposures using the R400 grating were taken starting at 07:27 UT on Nov. 19. Numerous emission lines are present at z=0.096. The slit was aligned through both the nucleus and the point source on the spiral...Full Text

The short hard GRB 091117A (localized by Swift-BAT and IPN, Cummings et al., GCN 10171) triggered Konus-Wind at T0=63869.513 s UT (17:44:29.513). The burst light curve consists of a single peak with a total duration of ~0.3 s. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB091117_T63869/ As observed by Konus-Wind the burst had a fluence of 1.9(-0.5, +0...Full Text

"We obtained optical r-band observations of the BAT error circle of GRB 091117 (GCN 10171) with IMACS on the Magellan/Baade 6.5-m telescope starting on 2009 Nov 19.06 UT. A comparison to DSS images reveals no new sources brighter than the DSS limit of about 21 mag. The galaxy coincident with the XRT source within the BAT error circle (GCN 10173) has a face-on spiral morphology. We find a...Full Text

"Inspection of Swift/XRT observations of the short GRB 091117 (GCN 10171) reveals an X-ray source coincident with an extended object in DSS images. The DSS object (APMUKS B020129.84-171252.3) is located at the following coordinates (J2000): RA = 02:03:53.35 DEC = -16:58:30.6 Optical observations are in progress." ...Full Text

"We carried out I-band observations of the GRB 091117 error box (Cummings et al., GCN 10171) with the 1.5m OSN telescope. The observations were performed on Nov 18.895-18.958 UT (27.7-29.3 hours post GRB). Visual comparison with the DSS does not reveal any new source in the error box brighter than I~20.5." ...Full Text

The Suzaku WAM alerted the IPN to a short hard burst that occurred at 17:44:29 UT on November 17th. The burst was seen in detector rates with Suzaku, Konus-Wind, INTEGRAL SPI ACS, and Swift-BAT. A source was found in ground analysis of BAT data (trigger 376211) at 12% coding. The BAT ground position was RA, Dec 30.945, -16.944, which is RA (J2000) 02h 03m 46.9s Dec (J2000) -16d 56' 38.0" with...Full Text