//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5301 SUBJECT: GRB 060712: Swift detection of a burst DATE: 06/07/12 21:29:42 GMT FROM: Scott Barthelmy at NASA/GSFC J. R. Cummings (NASA/ORAU), S. D. Barthelmy (GSFC), C. Gronwall (PSU), S. T. Holland (GSFC/USRA), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Perri (ASDC), M. Stamatikos (NASA/ORAU) and L. Vetere (ASDC) report on behalf of the Swift Team: At 21:07:43 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060712 (trigger=218582). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 184.061, +35.560 {12h 16m 15s, +35d 33' 35"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows very little structure above background. This is a 6.7-sigma detection in BAT spread over ~26 sec so little is expected to be seen in the BAT lightcurve. The peak count rate was ~500 counts/sec (15-350 keV). The XRT began taking data at 21:10:47 UT, 184 seconds after the BAT trigger. The XRT on-board centroid algorithm did not find a source in the image and no prompt position is available. However analysis of the downlinked Photon Counting mode data reveals a point source at the following coordinates: RA(J2000) = 12:16:16.3, Dec(J2000) = +35:32:17.7 with an error radius of 4.2 arcseconds (90% confidence). This position is 81 arcseconds from the BAT position. UVOT was in an engineering mode, so no UVOT data are currently available. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5303 SUBJECT: GRB060712: MASTER optical observation DATE: 06/07/12 21:59:12 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy, A.Krylov, G.Borisov, A.Sankovich, M.Sinitsin, P.Gritsyk Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRBGRB060712 (GRB_TIME is 2006-03-19 21:07:43.71) at high zenit distance jn the west at white night. The first R image was at 2006-07-12 21:10:32 UT, 72 s after notice time and 212 s after the GRB time The robot not find OT-candidate in error box brighter then 14.5 (s/n=3). The reduction is continuing. This work is supported by RFFI 04-02-16411 grant. This message can be cited. Mailto: lipunov@sai.msu.ru //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5304 SUBJECT: GRB 060712: Refined analysis of the Swift-BAT burst DATE: 06/07/13 01:47:07 GMT FROM: Scott Barthelmy at NASA/GSFC D. Hullinger (BYU-Idaho), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using the data set from T-119 to T+183 sec from recent telemetry downlinks, we report further analysis of BAT GRB 060712 (trigger #218582) (Cummings, et al., GCN Circ. 5301). The BAT ground-calculated position is RA,Dec = 184.065, +35.539 deg {12h 16m 15.7s, +35d 32' 21.6"} (J2000) +- 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 9%. The lightcurve for this weak source shows approximately 3 overlapping peaks starting at T_zero and lasting unit ~T+35 sec. T90 (15-350 keV) is 26 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T+0.6 to T+29.7 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.32. The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+16.76 sec in the 15-150 keV band is 1.7 +- 0.6 ph/cm2/sec. All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5305 SUBJECT: GRB 060712: XRT refined position DATE: 06/07/13 02:03:40 GMT FROM: Loredana Vetere at ASDC L. Vetere (ADSC), M.L.Conciatore (ASDC), J. R. Cummings (NASA/ORAU) report on behalf of the Swift/XRT team: XRT started observing the field of GRB060712 193 s after BAT trigger in PC mode. The 2.2 ks analysis of the first two orbits provides the refined XRT position: RA(J2000) = 12h 16m 16.3s, Dec(J2000) = +35d 32m 17.8s with an uncertainty of 3.8 arcsec (90% containment). This position is 0.1 arcsec away from the XRT position quoted in Cummings et al. (GCN5301) and 8.2" arcseconds from the refined BAT position (GCN5304). The light curve shows a fast initial decay. Further osbervations are ongoing. This circular is an official product of the Swift XRT Team. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5307 SUBJECT: GRB 060712: Swift/UVOT Upper Limits DATE: 06/07/13 15:09:29 GMT FROM: Stephen Holland at USRA/NASA/GSFC/SSC GRB 060712: Swift/UVOT Upper Limits S. T. Holland (GSFC/USRA) reports on behalf of the Swift/UVOT team: The Swift UVOT began taking data on the field of GRB 060712 (Swift Trigger 218582) 4983 s after the BAT trigger (Cummings et al. 2006, GCN Circular 5301). UVOT was in an engineering mode when the burst occurred so it did not make prompt observations of the field of this burst. No new source, relative to the DSS, is seen in any of the UVOT exposures inside the XRT error circle (Vetere et al. 2006, GCN Circular 5305). The 3-sigma upper limits are: Midpoint Exposure Filter Time (s) (s) Mag V 5141 197 19.44 3-sigma upper limit B 5959 197 20.64 3-sigma upper limit U 5754 197 20.06 3-sigma upper limit UVW1 5550 197 20.16 3-sigma upper limit UVM2 5345 197 19.38 3-sigma upper limit White 4985 98 19.88 3-sigma upper limit (160-650 nm) These upper limits have not been corrected for the estimated Galactic reddening of E_{B-V} = 0.01 mag (Schlegel et al. 1998). / \ / //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5308 SUBJECT: GRB 060712: XRT refined analysis DATE: 06/07/13 17:13:52 GMT FROM: Loredana Vetere at ASDC L. Vetere, M.L. Conciatore (ASDC), J. R. Cummings (NASA/ORAU) report on behalf of the Swift/XRT team: We have analysed the first 10 orbits of X-ray data for GRB 060712 for a total exposure time of 18 ks (up to ~14.5 h since the BAT trigger). The PC light curve, from 300 s after the BAT trigger can be fitted with a single powerlaw with decay index of 0.65 +/- 0.06. The 0.3-10 keV PC spectrum is well fitted by an absorbed power law with photon index of 2.7 +/- 0.4 with an nH value of (1.6 +/-0.9)e21 cm^-2, greater than the Galactic value of 0.13e21 cm^-2. The predicted unabsorbed flux at 24 hours after the BAT trigger is 6.8e-13 ergs cm^-2 s^-1. This circular is an official product of the Swift XRT Team. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5309 SUBJECT: GRB060712: P60 Observations DATE: 06/07/13 17:35:43 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko and E. O. Ofek (Caltech) report on behalf of a larger collaboration: We have imaged the field of GRB 060712 (Cummings et al; GCN 5301) with the automated Palomar 60-inch telescope. Observations consisted of 5 x 180 s exposures in the Kron R and Sloan i' filters taken at a mean epoch of approximately UT July 13.22 (~ 8.3 hours after the burst). Inside the revised XRT error circle (Vetere et al; GCN 5305), we find no evidence for any sources. The limiting magnitude of our observation is R < 20.5.