This file contains both GRB 060211 "A" and "B". //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4736 SUBJECT: GRB 060211: Swift detection of a long burst DATE: 06/02/11 10:13:41 GMT FROM: Hans Krimm at NASA-GSFC C. Hurkett (U Leicester), A. Beardmore (U. Leicester), O. Godet (U. Leicester), J. A. Kennea (PSU), H. Krimm (GSFC/USRA), F. Marshall (GSFC), J. Osborne (U. Leicester), D. Palmer (LANL), A. Parsons (GSFC) on behalf of the Swift Team: At 09:39:11 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060211 (trigger=181126). The BAT on-board calculated location is RA,Dec 58.402d, +21.486d {03h 53m 36s, +21d 29' 09"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Since this was a 128 second image trigger, we cannot determine the nature of the light curve from the TDRSS light curve. We will be able to comment on the time structure when we receive the full data set in a few hours. The Swift spacecraft slewed promptly onto the BAT position. The XRT began observing the field at 09:42:07 UT, 177 seconds after the BAT trigger. XRT found a bright, fading, uncatalogued X-ray source located at RA(J2000) = 03h 53m 32.5s, Dec(J2000) = +21d 29' 19.3", with an estimated uncertainty of 5.0 arcseconds (90% confidence radius). This location is 55 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 6.7e-09 erg/cm2/s (0.2-10 keV). UVOT took a finding chart exposure of 200 seconds with the V filter starting 183 seconds after the BAT trigger. No 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 18th 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 of about 0.6 magnitudes. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4737 SUBJECT: GRB 060211: ROTSE-III Optical Limits DATE: 06/02/11 10:43:25 GMT FROM: Wiphu Rujopakarn at U Michigan/ROTSE W. Rujopakarn (U Mich), E.S. Rykoff (U Mich), B. E. Schaefer (Louisiana State), F. Yuan (U Mich), S.A. Yost (U Mich), report on behalf of the ROTSE collaboration: ROTSE-IIIa, located at Siding Spring Observatory, Australia, responded to GRB 060211 (Hurkett et al., GCN 4736), producing images beginning 6.2 s after the GCN notice time. An automated response took the first image at 09:41:38.2 UT, 147.2 s after the burst, under twilight conditions. We took 10 5-sec, and 100 20-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma error circle, for both single images and coadding into sets of 10. Individual images have limiting magnitudes ranging from 14.0-16.2; we set the following specific limits. start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd? -------------------------------------------------------------------- 09:41:38.2 09:41:43.2 5 14.3 147.2 N 09:41:38.2 09:43:51.7 133 15.7 147.2 Y 09:44:00.9 09:48:44.2 283 16.1 289.9 Y //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4738 SUBJECT: GRB060211: Faulkes North observation DATE: 06/02/11 11:21:08 GMT FROM: Andreja Gomboc at ARI,Ljubljana,Slovenia/Swift A. Gomboc, C. Guidorzi, I. A. Steele, S. Kobayashi, C.G. Mundell, A. Monfardini, A. Melandri, C.J. Mottram, R.J. Smith, D. Bersier, D. Carter, M.F. Bode (Liverpool JMU), P. O'Brien, E. Rol, N. Bannister (U. of Leicester) report: "The 2-m Faulkes Telescope North robotically followed up GRB060211 (SWIFT trigger 181126, Hurkett et al. GCN 4736) starting 5.4 min after the GRB trigger time. Within the XRT position, we do not find an optical counterpart to a limiting magnitude of R~18.5 in 3x10s co-added images. In addition, we find no obvious candidates in a 4.6' x 4.6' region centered on the BAT position, to the same limiting magnitude. Limiting magnitude has been derived with reference to USNOB1." //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4739 SUBJECT: GRB 060211B: Swift-BAT detection of a burst DATE: 06/02/11 16:23:22 GMT FROM: Scott Barthelmy at NASA/GSFC S. Mateos (U Leicester), S. Barthelmy (GSFC), N. Gehrels (GSFC), O. Godet (U Leicester), C. Hurkett (U Leicster), J. Kennea (PSU), H. Krimm (GSFC/USRA), F. Marshall (GSFC), J. Osborne (U Leicester), K. Page (U Leicester), D. Palmer (LANL) on behalf of the Swift team: At 15:55:15 UT, Swift-BAT triggered and located GRB 060211B (trigger=181156). The spacecraft slewed immediately. The BAT on-board calculated location is RA,Dec 75.069d,+14.958d {05h 00m 17s,+14d 57' 27"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). The BAT light curve shows two main peaks starting about 10 sec before the trigger and extending to T+15sec, with a total duration of ~30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 seconds at the trigger. The XRT began taking data at 15:56:38 UT, 83 seconds after the BAT trigger. The XRT on-board centroid algorithm did not converge and no prompt position is available. The lightcurve shows evidence of a fading source. We are waiting for down-linked data to detect and determine a position for the source. UVOT took a finding chart exposure of 200 seconds with the V filter starting 84 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 25% of the BAT error circle. The typical 3-sigma upper limit has been about 18th mag. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18.0 mag. No correction has been made for the expected extinction of about 1.4 magnitudes. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4740 SUBJECT: GRB 060211A: Swift XRT Team Refined Analysis DATE: 06/02/11 16:58:32 GMT FROM: Cheryl Pauline Hurkett at Leicester U C. P. Hurkett, K. Page, E. Rol, J. Osborne, O. Godet and A. Beardmore (U Leicester) report on behalf of the Swift XRT team: We have analysed the Swift XRT data from the first orbit observation of GRB 060211A (Hurkett et al. GCN 4736), with a total Windowed Timing (WT) mode exposure of 195 seconds and Photon Counting (PC) mode exposure of 1040 seconds. The refined XRT position is: RA(J2000) = 03 53 32.8 Dec(J2000) = +21 29 21.0 This position is 3.9 arcseconds from the XRT position given in GCN 4736. We estimate an uncertainty of 3.7 arcseconds radius (90% containment). The 0.3-10 keV light curve in WT and PC mode starts 185 seconds from the BAT trigger. The lightcurve (after only one orbit) appears to exhibit a broken powerlaw behaviour, where both decay indices are steep. The indices are: alpha_1 = 4.14 +/- 0.11, which at 475 seconds (+48/-32) changes to a slower decay of alpha_2 = 2.26 (+0.26/-0.32). A preliminary spectral fit to the WT data gives a power law photon index of 1.94 +/- 0.07 in the 0.3-10 keV band, where Galactic absorption is assumed to be 1.25e21 cm^-2. An excess absorption component is noted at (7+/-2)e20 cm^-2. In the time range of 185-380 seconds after trigger, the estimated unabsorbed 0.3-10 keV flux is 1.19e-9 ergs/cm2/s. The observed 0.3-10.0 keV flux is 8.54e-10 erg/cm2/s. Because of the Malindi Gap, only one orbit of data has been analysed so far. We cannot accurately estimate the flux at T+24 hr yet. This circular is an official product of the Swift XRT Team. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4741 SUBJECT: GRB060211.7: MASTER_optical_observation under the snow DATE: 06/02/11 17:34:27 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, G.Antipov, V.Vladimirov M.Sinitsin, P.Gritsyk Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRB060211.7 (GRB_TIME is 2006-02-11 15:55:14.76). The first image was at 2006-02-11 15:59:57 UT, 00:04:42.24 after the GRB time (after opening the roof under snow). The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0.2 B). 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: 4743 SUBJECT: GRB060211B: Swift/XRT position DATE: 06/02/11 19:03:48 GMT FROM: Jamie A. Kennea at PSU/Swift-XRT J. A. Kennea (PSU), K. Page and C. Hurkett (U. Leicester) report on behalf of the Swift/XRT Team: We have performed a preliminary analysis of Swift/XRT ground-linked data for GRB060211B (Mateos et al., GCN 4739). We find a uncatalogued, fading source at the following location: RA(J2000): 05:00:17.2 Dec(J2000): +14:56:57.1 with an estimated uncertainty of 6 arcseconds (90% containment). This position lies 33 arcseconds from the BAT position reported in GCN 4739. A full analysis of the XRT data will follow. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4744 SUBJECT: GRB060211b: optical observation DATE: 06/02/11 21:27:22 GMT FROM: Alexei Pozanenko at IKI, Moscow R. Salyamov, M. Ibrahimov, (MAO), A. Pozanenko (IKI), V. Rumyantsev (CrAO) on behalf of larger GRB follow up collaboration report: We observed the error box of GRB060211b (Mateos et al., GCN 4739) with 1.5m telescope of Maidanak Astronomical Observatory. We started the observation on Jan. 11 (UT) 16:15:54 (i.e. 20.7 minutes after GRB) and took a series of 300 sec frames in R-band. In a first frame of 300 s exposure we do net reveal any optical source within refined XRT error circle (Kennea et al., GCN 4743). The limiting magnitude of the first frame is 19.3R as calibrated against USNO B1.0. Further analysis is underway. This message may be cited //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4745 SUBJECT: GRB 060211B: Swift-XRT Team refined analysis DATE: 06/02/11 22:52:30 GMT FROM: Kim Page at U.of Leicester K.L. Page, E. Rol, A.P. Beardmore (U Leicester) and A.J. Levan (U. Hertfordshire) report on behalf of the Swift XRT team: Analysing the first three orbits of data (28 s in Windowed Timing mode and 6.4 ks in Photon Counting mode), the following refined position for the X-ray afterglow was determined: RA(J2000) = 05h 00m 17.2s Dec(J2000) = +14d 56' 58.9" with an estimated uncertainty of 3.9 arcsec (90% containment). This is 31.6 arcsec from the on-board BAT position reported in GCN 4739 and 1.9 arcsec from the XRT position given in GCN 4743. The light-curve shows a steep initial decay of 2.09 +/- 0.23, flattening to a slope of 0.62 +/- 0.23 towards the end of the first orbit (at 811 +/- 373 seconds after the trigger). The spectrum obtained for the first orbit of data (118 - 2380 s post-trigger) can be fitted with a power-law of photon index Gamma = 1.54 +/- 0.27, assuming a Galactic column of 1.9e21 cm^-2; there is no evidence for excess NH in these data. Over this time span, the mean 0.3-10 keV observed (unabsorbed) flux is 4.1e-12 (4.9e-12) erg cm^-2 s^-1. Assuming the current decay slope of 0.62 continues, and using the spectral fit to the first orbit of data, the XRT count rate is predicted to be 0.002 at 24 hours, corresponding to an observed (unabsorbed) flux of 8.0e-14 (9.7e-14) erg cm^-2 s^-1. However, taking into account the uncertainty in the decay slope, the observed flux at 24 hours could range between (0.3 - 2.4)e-13 erg cm^-2 s^-1. This circular is an official product of the Swift-XRT Team. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4747 SUBJECT: GRB 060211B: Swift/BAT refined analysis DATE: 06/02/11 23:52:58 GMT FROM: Hans Krimm at NASA-GSFC J. Tueller (GSFC), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (ISAS), on behalf of the Swift-BAT team: Using the data set from T-61 to T+122 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060211 (trigger #181156) (Mateos, et al., GCN 4739). The BAT ground-calculated position is (RA,Dec) = 75.076, 14.954 deg {5h 0m 18.2s, 14d 57' 14.5"} (J2000) +- 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 82%. The mask-tagged light curve shows a multi-peak structure with possible extended emission. The burst started at T-12 sec with a small peak, then a 4-sec long peak at T+0 that decays out to ~T+10 sec and low-level emission out to T+20 sec. Additionally, there is a possible 10-sec wide weak peak centered on T+100 sec and a possible faint precursor at T-22 sec. T90 (15-350 keV) is (29 +- 5) sec (estimated error including systematics). Since we do not have data past T+122 sec, we cannot say at this time anything about the extended lightcurve. We expect that it will take at least a day to get that data downlinked. The time-averaged spectrum from T-11.0 to T+21.7 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.55 +- 0.21. The fluence in the 15-150 keV band is (4.7 +- 0.6) x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+1.84 sec in the 15-150 keV band is (0.7 +- 0.1) ph/cm2/sec. All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4751 SUBJECT: GRB 060211A: Partial refined analysis on the Swift-BAT burst DATE: 06/02/12 17:06:41 GMT FROM: Scott Barthelmy at NASA/GSFC G. Sato (ISAS), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), C. Hurkett (U Leicester), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using a paritally downloaded data set from T-60 to T+123 sec from a recent telemetry downlink, we report further analysis of BAT GRB 060211A (trigger #181126) (Hurkett, et al., GCN 4736). The BAT ground-calculated position is RA,Dec = 58.361,+21.485 deg {3h 53m 26.6s,+21d 29' 4.4"} (J2000) +- 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. Using data from T-60 to +123, the lightcurve shows some very weak emission starting at T_zero out to T+50, then the bulk of the emission is from T+50 to T+100 with weak emission extending out to T+123 where our downloaded data set currently ends. T90 (15-350 keV) is 43 +- 10 sec (estimated error including systematics). The time-averaged spectrum from T+47.8 to T+97.1 is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.40 +- 0.64, and an Epeak of 94 +- 49 keV (chi squared 42 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 8.2 +- 0.8 x 10^-07 erg/cm2 and the 1-sec peak flux measured from T+53.94 sec in the 15-150 keV band is 0.3 +- 0.1 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.30 +- 0.14 (chi squared 49 for 57 d.o.f.). All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4752 SUBJECT: GRB 060211b: P60 Observations DATE: 06/02/12 19:53:53 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko, E. O. Ofek, A. M. Soderberg (Caltech) and D. B. Fox (Penn State) report on behalf of a larger collaboration: We have imaged the field of GRB060211b (Mateos et al., GCN 4739) with the automated Palomar 60-inch telescope. Our observations were taken in the R and i' filters at a mean epoch of approximately Feb. 12.21 UT. Inside the revised XRT error circle (Page et al., GCN 4745) we find no sources. The limiting magnitude of our observations, calculated with respect to the USNOB R and I filters, is approximately R,I > 21.0. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4757 SUBJECT: GRB 060211A: Further refined analysis of the Swift burst DATE: 06/02/13 18:39:23 GMT FROM: Hans Krimm at NASA-GSFC H. Krimm (GSFC/USRA), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), C. Hurkett (U Leicester), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (ISAS), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using the data set from T-300 to T+303 sec from a recent telemetry downlink, we report further analysis of the results from BAT GRB 060211A (trigger #181126) (Hurkett, et al., GCN 4736, Sato, et all, GCN 4751). The BAT ground-calculated position is RA,Dec = 58.380, 21.489 deg {3h 53m 31.1s, 21d 29' 20.0"} (J2000) +- 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted lightcurve shows that this was a very long burst. There was a weak, soft precursor starting at T-180 secs and lasting, in the lowest energy band, until T-90 secs. There is another episode of weak emission from T-10 to T+50, and then two prominent peaks from T+50 to T+100 and from T+130 to T+180 secs. The first of the main peaks is harder than the second. There is no significant emission beyond T+190 secs. T90 (15-350 keV) is (126 +- 5) sec (estimated error including systematics). The time-averaged spectrum from T+47.8 to T+191.0 is best fit by a power law with an exponential cutoff. This fit gives a photon index of 0.85 +- 0.53, and Epeak of 58.3 +- 13.2 keV (chi squared 59 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is (1.5 +- 0.1) x 10^-06 erg/cm2 and the 1-sec peak flux measured from T+145.58 sec in the 15-150 keV band is (0.4 +- 0.1) ph/cm2/sec. A fit to a simple power law gives a photon index of 1.76 +- 0.11 (chi squared 70 for 57 d.o.f.). All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4758 SUBJECT: GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec DATE: 06/02/13 18:48:00 GMT FROM: Hans Krimm at NASA-GSFC A. Parsons (GSFC), L. Barbier (GSFC),S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), T. Sakamoto (GSFC/ORAU), G. Sato (ISAS), J. Tueller (GSFC), on behalf of the Swift-BAT team: We have now reviewed the recently downloaded GRB 060211B data for the T+122 s to T+300 s interval and find no additional burst activity beyond T+122 s. The temporal and spectral fits values given in GCN 4747 (J. Tueller et al.) have not changed. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4759 SUBJECT: GRB060211B: REM optical and NIR observations DATE: 06/02/14 00:21:31 GMT FROM: Paul Ward at Dunsink Obs P. Ward, L. A. Antonelli, E. Molinari, G. Chincarini, F.M. Zerbi, S. Covino, V. Testa, G. Tosti, F. Vitali, P. Conconi, G. Cutispoto, G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, P. Goldoni, on behalf of the REM/ROSS team, report: The field of GRB 060211B (Mateos et al. GCN 4739) was imaged by the REM telescope located in La Silla (Chile). The field was observed with the REMIR near infrared camera in the J, H, K' filters and ROSS in the V, R, I filters, starting on Feb. 12, at 00:30 UT, approximately 8.5 hrs after the burst. No sources are detected within the refined XRT error circle (Page et al., GCN 4745) down to the limiting magnitudes of J=16.4, H=16.2, K=13.9, V=17.1, R=18.1, I=17.3 (3-sigma upper limits). This message is citeable. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4760 SUBJECT: GRB 060211a: WIRO NIR Observations DATE: 06/02/14 03:32:59 GMT FROM: Jay Norris at NASA-GSFC/LHEA J. Norris, A. Kutyrev (NASA/GSFC), R. Ganguly, R. Canterna, and M. Pierce (U. Wyoming) report: We observed the refined XRT error box reported by Hurkett et al. (GCN 4740) for the very long burst, GRB 060211a (Swift trigger #181126; Hurkett et al. GCN 4736; Krimm et al. GCN 4757) with the 2.3-meter WIRO telescope. Observations commenced at 2006/02/12 02:44 UT (17 hrs after the burst) and continued until 03:24 UT. We obtained thirty-six 50-s integrations in the J band under poor seeing conditions. In the stacked image, no source was detected within the XRT error circle to a limit of J = 19.1 (3-sigma upper limit). //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4766 SUBJECT: GRB 060211b: WIRO NIR Observations DATE: 06/02/16 06:12:35 GMT FROM: Jay Norris at NASA-GSFC/LHEA J. Norris, A. Kutyrev (NASA/GSFC), R. Ganguly, R. Canterna, and M. Pierce (U. Wyoming) report: We observed the refined XRT error circle reported by Page et al. (GCN 4745) for GRB 060211a (Swift trigger #181156; Mateos et al., GCN 4739; Tueller et al., GCN 4747) with the 2.3-meter WIRO telescope. Observations commenced at 2006/02/12 03:35 UT (11.7 hrs after the burst) and continued until 04:15 UT. We obtained twenty 100-s integrations of the target region in the J band under poor seeing conditions. In the stacked image, no source was detected within or near the XRT error circle to a limit of J = 19.2 (3-sigma upper limit). //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4772 SUBJECT: GRB 060211B: Skynet Observations DATE: 06/02/17 21:16:27 GMT FROM: Chelsea Louise MacLeod at UNC-Chapel Hill/PROMPT C. MacLeod, A. Trotter, M. Nysewander, A. LaCluyze, D. Reichart, J. Harvey, J. A. Crain, A. Foster, K. Ivarsen, J. Haislip, J. Kirschbrown, and J. Carpenter report on behalf of the UNC team of the FUN GRB collaboration: Skynet observed the localization of GRB 060211B (Mateos et al., GCN 4739) with three of the 16-inch PROMPT telescopes at CTIO and with 14.5-inch TTT in Colorado beginning 9.3 hours after the burst: Filter Telescope Start (UT) Stop (UT) Exposures Total (hr) B PROMPT-2 01:08:23 04:41:04 141 x 80s 3.13 r' PROMPT-4 01:08:26 04:41:08 84 x 80s 1.87 I PROMPT-1 01:08:23 04:41:11 140 x 80s 3.11 i' PROMPT-4 02:34:32 04:00:09 56 x 80s 1.24 Green* TTT 05:26:17 06:49:00 18 x 160s 0.80 Blue TTT 06:51:41 07:44:41 12 x 160s 0.53 * Approximates V band No new source is found to I > 20.5 mag (3 sigma; calibrated to five USNO-B1.0 stars). //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4778 SUBJECT: GRB 060211B: Swift/UVOT Upper Limits DATE: 06/02/18 12:25:30 GMT FROM: Padi Boyd at GSFC P. Boyd (GSFC), S. Mateos (U Leicester) and F. Marshall (GSFC) on behalf of the Swift/UVOT team report: The Swift/UVOT began observing the field of GRB 060211B at 15:56:39 UT on 2006-02-11, approximately 83 s after the BAT trigger (Mateos et al., GCN 4739). No source is detected in the refined XRT error circle (Page et al., GCN 4745) in the initial V finding chart, nor the summed images down to the following 3-sigma magnitude upper limits: Filter T_range(s) Exp(s) 3sigUL(mag) V 83-283 200 19.4 V 83-7768 869 20.5 B 290-7213 718 21.4 U 615-6955 301 20.4 UVW1 591-8168 550 20.8 UVM2 567-7972 490 20.8 UVW2 519-7604 278 21.2 White 494-7359 236 20.7 Reported times are in seconds since the BAT trigger. These magnitudes are uncorrected for the expected Galactic extinction corresponding to E(B-V) = 0.407. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4925 SUBJECT: GRB060211B: optical observation DATE: 06/03/27 11:55:31 GMT FROM: Alexei Pozanenko at IKI, Moscow D. Sharapov (MAO, and NOT, La Palma), M. Ibrahimov (MAO) and A. Pozanenko (IKI), on behalf of larger GRB follow up collaboration report: We observed GRB 060211B (Mateos et al., GCN 4739; Tueller et al., GCN 4747) with 1.5m telescope of Maidanak Astronomical Observatory in R-band on Feb. 20 (UT) 16:16 - 16:50 (Salyamov et al., GCN 4744). In combined image we marginally detect two objects within refined XRT error circle Page et al. (GCN 4745): id1: RA(J2000) = 05:00:17.11 Dec = +14:57:01.06 id2: RA(J2000) = 05:00:17.19 Dec = +14:56:55.74 Mid. time, Exp., id1, id2, Limit, Seeing (UT) (s) Feb.11.6895 6x300 22.1 +/-0.3 22.3 +/-0.3 22.1 ~1.3" The photometry and astrometry is based on USNO B1.0. The both objects are not detectable in separate images, in particular in the first image obtained starting 20.7 minutes from burst onset. Combined image can be found in http://grb.rssi.ru/GRB060211b/grb060211b_AZT22R.jpg //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4927 SUBJECT: GRB 060211A: optical observation DATE: 06/03/27 12:11:35 GMT FROM: Alexei Pozanenko at IKI, Moscow D. Sharapov (MAO, and NOT, La Palma), M. Ibrahimov, (MAO), A. Pozanenko (IKI) and V. Rumyantsev (CrAO) on behalf of larger GRB follow up collaboration report: We observed the refined XRT error box reported by Hurkett et al. (GCN 4740) of GRB 060211A (Hurkett et al. GCN 4736; Krimm et al. GCN 4757) with 1.5m telescope of Maidanak Astronomical Observatory in R-band on Feb. 11 (UT) 15:02 - 15:22. The limiting magnitude is based on USNO B1.0: Mid. time, Exp., Limit, Seeing (UT) (s) Feb.11.640 1860 22.0 ~1.5" The extended object in the FOV with coordinates RA(J2000)= 03:53:31 (+/- 10 arcsec) Dec(J2000)= +21:28:58 (+/- 10 arcsec) with R~21.5 is the asteroid 16306 moving toward N-E. The combined image can be found in http://grb.rssi.ru/GRB060211/GRB060211_AZT22R.jpg //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5204 SUBJECT: GRB 060211A : WIDGET simultaneous optical observations DATE: 06/06/03 12:40:27 GMT FROM: Toru Tamagawa at RIKEN Y. Urata (Saitama-U), M. Kuwahara (TUS/RIKEN), M. Tashiro, K. Abe, K. Onda, N. Kodaka, K. Masuno (Saitama-U), F. Usui (ISAS/JAXA), T. Tamagawa (RIKEN) report: "WIDGET has continuously monitored the entire error region of the GRB 060211A (Hurkett et al. GCN 4736, 4740) with repeat of unfiltered 5-second exposures during the night of 11th February. The 1-sigma limiting magnitude of images taken between 792 seconds before and 321 seconds after the burst was around V=10.8 magnitude. The magnitude was derived by the Tycho-2 catalog. There was no significant emission from the X-ray afterglow position up to the limiting magnitudes." This message maybe cited.