"At 11:45:38.26 UT on 05 February 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 100205B (trigger 287063140 / 100205490). The on-ground calculated location, using the GBM trigger data, is RA = 133.9, DEC = -23.0 (J2000 degrees, equivalent to 08h 55m, 23d 00'), with an uncertainty of 8.2 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error...Full Text

We observed the field of GRB 100206A (Swift trigger #411412; Krimm et al., GCN 10376) 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 LaSilla Observatory (Chile). Observations started on 7 February 2010 at 00:31 UT, 11 hours after the GRB trigger, and were performed at high airmass and poor seeing conditions. In stacked images...Full Text

"We observed the field of the short GRB 100206A (GCN 10376) with GMOS on the Gemini-North 8-m telescope starting on 2010 Feb 7.215 (15.7 hours after the burst). Observations were obtained in the i- and z-band filters for a total of 1200 sec in each filter. Inside the refined XRT error circle (GCN 10378) we detect the candidate optical afterglow detected with the WHT (GCN 10386). Within the...Full Text

The Swift/UVOT began settled observations of the field of GRB 100206A 78 s after the BAT trigger (Krimm et al., GCN 10376). No optical afterglow consistent with the refined XRT position (Goad et al., GCN 10378) or the candidate optical afterglow position (Levan et al., GCN 10386) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Poole...Full Text

E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zemnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, T.Kopytova, A. Popov Ural State University, Kourovka K...Full Text

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E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zemnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, T.Kopytova, A. Popov Ural State University, Kourovka K...Full Text

We have imaged the field of the short-hard GRB 100206A (Krimm et al., GCN 10376) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2010-02-07 02:37:50 UT (~13.1 hours after the burst). The potential host galaxy (Miller et al., GCN 10377) is clearly detected in mosaics taken simultaneously in the J, H, and Ks filters (effective exposure time of 2293 seconds). The preliminary photometry...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 observed the field of GRB 100206A (Krimm et al. GCN 10376) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2010-02-06 13:31:10 UT (65s after the burst). We did not find any new point source in the XRT error circle in all the three bands. Three sigma upper limits of the OT are listed...Full Text

We observed the field of GRB 100206A (Krimm et al., GCN 10376) with the NOT equipped with NOTCam. Observations were carried out in the Ks-filter (6x9x60 s) starting at 20h24 UT, i.e. 6.9 hr after the GRB. Inside the enhanced XRT position (Goad et al., GCN 10378) we do not detect any object down to a limiting magnitude > 19.7 (based on the nearby 2MASS star 03083760+1308461). The extended...Full Text

"We observed the localization of GRB 100206A (Krimm et al. GCN 10376) with the WHT beginning at 20:33 UT, approximately 7 hours after the burst. Observations were obtained in the i and z bands with exposures of 2000 and 2400s respectively. Inside the refined XRT error circle (Goad et al. GCN 10378), we detect a faint source in both the i and z-bands. The location of the source is: RA(J2000)...Full Text

We have observed the field covering the error circle of GRB GRB 090206A (Swift trigger 411412, GCN 10376, Krimm et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 13:31:14 UT, about 1 min after the Swift trigger time. We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, There is no new source at the reported position...Full Text

“Following the detection of the short-duration gamma-ray burst GRB 100206A by Swift/BAT (Krimm et al. GCN 10376), we have conducted follow-up observations with the 0.6m TELMA robotic telescope (+ clear filter) at the BOOTES-2 station in Málaga and with the 1.5m OSN telescope (+ I-band filter) at Observatorio de Sierra Nevada in Granada. No optical afterglow is detected within the Swift/XRT error...Full Text

We observed the field of GRB 100205A (Swift trigger #411248; Racusin et al., GCN 10361) 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 LaSilla Observatory (Chile). Due to cloud coverage, observations started only on 05 Feb. 2010 at 06:37:58 UT, 2.3 h after the burst, and were severely affected by passing cirrus. In stacked...Full Text

We have analysed 1.3 ks of XRT data for GRB 100206A (Krimm et al. GCN 10376), from 82 s to 1.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 10378). The light curve can be modelled with a power-law decay with a decay index of alpha=1.9 (+0.9/-0.7). A spectrum formed from the PC mode data...Full Text

"At 13:30:05.39 UT on 06 February 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 100206A (trigger 287155807 / 100206563) which was also detected by the SWIFT-BAT (Krimm et al. 2008, GCN 10376). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 44.7 degrees. The Fermi Observatory executed a maneuver following this trigger...Full Text

We imaged the field of GRB 100206A (Krimm et al. GCN 10376, Goad et al GCN 10378) using the 2-m telescope of the IUCAA Girawali Observatory. Four 15-min exposures in R-band were taken on 06 Feb 2010 starting at 15:46 UT. The stacked 1 hour exposure shows no optical transient to a limiting magnitude of R ~22. The extended source reported by Miller et al (GCN 10377) is however clearly detected...Full Text

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Using 1262 s of XRT Photon Counting mode data and 1 UVOT images for GRB 100206A, 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 = 47.16225, +13.15708 which is equivalent to: RA (J2000): 03h 08m 38.94s Dec (J2000): +13d 09' 25.5" with an uncertainty of 3.2 arcsec (radius, 90% confidence). This...Full Text