The Katzman Automatic Imaging Telescope (KAIT) began observations of GRB 100728B (Morris et al., GCN 11009) at 30 sec after the trigger time (10 sec after the GCN notice), and continued to track the afterglow in a combination of V, I, and unfiltered exposures until shut down by morning twilight. The afterglow remains detected throughout this period. An series of 2-second frames taken between...Full Text

The Katzman Automatic Imaging Telescope (KAIT) responded to GRB 100728A and began taking data starting less than one minute after the trigger. A moderately bright optical transient not present in DSS survey imaging is visible in the initial set of exposures at the following position: RA = 02:56:13.48 dec = +00:16:51.8 (J2000) We measure I = 18.7 +/- 0.3 mag at 10:33:51 UT (t = 95 secs after...Full Text

We have obtained spectra of the galaxy dubbed "G7" (Berger, GCN 10943) inside the possible X-ray afterglow error circle (Starling et al., GCN 10941) of the short GRB 100628A (Immler et al., GCN 10895) with the Low Resolution Imaging Spectrometer mounted on the 10 m Keck I telescope. Our observations began at 6:25 UT on 8 July 2010 and cover the wavelength range from 3500-10000 A. The spectrum...Full Text

Beginning 2010/06/15 01:59 UT (6.1 days post burst) and for a period of 14.8 ksec (livetime), Chandra targeted the field of the optically dark GRB 100615A (D'Elia et al. 2010, GCN 10841; Foley et al. 2010, GCN 10851) with ACIS-S under Director's Discretionary Time. The X-ray afterglow is well detected (210 cts, 0.5-8 keV) at a position consistent with that of the Swift GRB and afterglow (GCN 10841...Full Text

We have imaged the field of GRB 100614A (Stratta et al., GCN 10837) with the Gemini Near InfraRed Imager on the 8-m Gemini North telescope. Observations were obtained in the Y, J, and K filters beginning at 7:05 UT on 15 June 2010 (~ 9.5 hours after the burst). We find no sources inside the revised XRT error circle (Osborne et al., GCN 10849) to limiting magnitudes of J > 22.7, K > 21.6...Full Text

We have imaged the field of GRB 100615A (D'Elia et al., GCN 10841) with the Near InfraRed Imager on the 8-m Gemini North telescope. Observations were obtained in the J and K filters beginning at 7:36 UT on 15 June 2010 (~ 5.5 hours after the trigger). We find no sources inside the revised XRT error circle (Goad et al., GCN 10848) to limiting magnitudes of J > 22.1, K > 20.9 (Vega, calibrated...Full Text

We imaged the field of GRB 100526A (Vetere et al., GCN 10797) with the Near-InfraRed Imager (NIRI) on Gemini-North starting at 08:29 UT on 2010-05-27. We obtained 18 exposures of 60 seconds each in K-band and H-band. At the edge of the XRT error circle (Beardmore et al., GCN 10800) we clearly detect a source with no SDSS counterpart in the K-band image. It is also present, but much fainter...Full Text

We have obtained an optical spectrum of the afterglow (Morgan et al., GCN 10747) of GRB 100513A (Baumgartner et al., GCN 10746) with the Gemini Multi-Object Spectrograph mounted on the 8 m Gemini North telescope. Observations began at 6:13 UT on 13 May (~ 4.1 hours after the GRB) and cover the wavelength range from 6000-10000 A. The spectrum exhibits a strong break at approximately 7000 A which...Full Text

We have obtained a second epoch of K-band imaging of the field of GRB 100424A (Hoversten et al., GCN 10667) with the Near InfraRed Imager and Spectrometer mounted on the 8 m Gemini North telescope. Observations began at 11:23 UT on 26 April 2010 (~ 43 hours after the burst). The previously identified candidate in the XRT error circle (Cenko et al., GCN 10682) has faded by 0.9 +/- 0.1 mag, confirming...Full Text

We have obtained spectra of the proposed host galaxy (Bloom and Nugent, GCN 10433; Holland et al., GCN 10436) and the optical afterglow (Jakobsson et al., GCN 10438; Kruehler et al., GCN 10439) of GRB 100219A (Rowlinson et al., GCN 10430) with the Gemini Multi-Object Spectrograph mounted on the 8-m Gemini South telescope. Our first sequence of 2 x 900 s observations started at 2:44 UT on 20...Full Text

We have obtained multiple epochs of imaging of the field of GRB 091127 (Troja et al., GCN 10191) using the Gemini Multi-Object Spectrograph (GMOS) on the 8 m Gemini South telescope and the ANDICAM instrument on the 1.3m telescope at CTIO. For the first ~10 days post-burst, the optical afterglow of the GRB (e.g. Smith et al., GCN 10192, Immler et al., GCN 10193, Cobb, GCN 10244) dominates...Full Text

We have obtained spectra of the likely host galaxy (Miller et al., GCN 10377) and afterglow (Levan et al., GCN 10386) of the short-hard GRB 100206A (Krimm et al, GCN 10376) with the Low Resolution Imaging Spectrometer mounted on the 10-m Keck I telescope. Observations began at 06:17 UT on 7 February (~ 16.8 hours after the burst) and cover the wavelength range from approximately 3500 - 10000...Full Text

We have obtained pre-explosion images of the field of GRB 100117A from the Canada-France-Hawaii MegaCam archive. Images were obtained in the g', r', and z' filters on 26 December 2005, and in the i' filter on 12 November 2007. Exposure times ranged from 240 s in g'-band to 500 s in i'-band. Inside the candidate XRT afterglow localization (de Pasquale; GCN 10336), we find four sources, with the...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 obtained optical spectra of the afterglow of GRB 091029 (Grupe et al., GCN 10097; Filgas et al., GCN 10098; LaCluyze et al., GCN 10099) using GMOS on Gemini-South. Our spectra cover the wavelength range of 3900-8100 angstroms with the R400 grating. Our first 600s exposure, starting at 06:06 UT on Oct. 29 (2.2 hr after the BAT trigger) reveals absorption lines from Lyman-alpha, C II, C IV...Full Text

We have imaged the field of the Fermi GRB 090926A (Bissaldi et al., GCN 9933; Uehara et al., GCN 9934) with the Gemini Multi-Object Spectrograph mounted on the 8-m Gemini South telescope. Observations were taken in the Sloan g', r', and i' filters beginning at 2:28 UT on 19 October 2009 (~ 22.9 d after the GBM trigger). We detect a faint source in all filters at the location of the optical afterglow...Full Text

We have imaged the field of GRB 090709A (Morris et al., GCN 9625) with the automated Palomar 60-inch telescope. Observations began at 7:40:26 UT on 9 July 2009 (~ 2 minutes after the burst trigger) and were taken in the r', i', and z' filters. We marginally detect a faint source at the location of the NIR afterglow (Aoki et al., GCN 9634, Morgan et al., GCN 9635) in our first r' and z' images...Full Text

We have obtained a spectrum of the afterglow (GCN 9512, 9513, 9514, 9515) of GRB 090618 with the KAST spectrograph on the 3-m Shane telescope at Lick Observatory. Observations began at 08:48 UT on 18 June 2009, approximately 20 minutes after the burst. On the blue channel (using the 830/3460 grism, providing wavelength coverage from 3200 - 4400 A), we detect a number of strong absorption features...Full Text

We have analyzed the KAIT observations on GRB 090618 (GCN 9512) as reported in GCN 9514. Our first 2s unfiltered observation started at 08:29:44 UT, 75 s after the BAT trigger. The OA as reported in GCN 9512, 9513, 9514, and 9515 is clearly detected. Subsequent observations show that the OA declined and reached a bottom at t=92 s, then brightened and reached a peak at t=120 s. After the peak...Full Text

The Katzman Automatic Imaging Telescope (KAIT) responded to GRB 090618 and began taking data at 08:31:10 (UT). A bright (~14th magnitude) optical afterglow is visible in the initial set of exposures at the following position: RA 19:35:58.80 dec +78:21:25.5 Further follow-up is in progress. ...Full Text