GRB120211A

This page lists all entries on GRB120211A in GRBweb

Summary IPN Swift GCN 12920 GCN 12921 GCN 12922 GCN 12923 GCN 12924 GCN 12925 GCN 12926 GCN 12927 GCN 12928 GCN 12929 GCN 12931 GCN 12953

Summary table
Variable Value Source
T0 11:58:28 UTC GCN_circulars,Swift Det
ra 87.7538° Swift
decl -24.7753° Swift
pos_error 2.07e-04° Swift
T90 61.7 s Swift
T90_start 11:58:28 UTC Swift
fluence 8.10e-07 erg/cm² Swift
redshift 2.4000 IPN
T100 61.7 s
GBM_located False
mjd 55968.498935185184 GCN_circulars,Swift Det
IPN table
GRB_name GRB120211A
ra 87.7500°
decl -24.7667°
pos_error 5.00e-02°
redshift 2.4000
Swift table
GRB_name GRB120211A
t_trigger 11:58:28 UTC
ra 87.7538°
decl -24.7753°
pos_error 2.07e-04°
T90 61.7 s
fluence 8.10e-07 erg/cm²
GCN 12920 table
GRB_name GRB120211A
GCN_number 12920
Detection_method Swift Det
t_trigger 11:58:28 UTC
ra 87.7510°
decl -24.7590°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12920 SUBJECT: GRB 120211A: Swift detection of a burst DATE: 12/02/11 12:10:51 GMT FROM: David Palmer at LANL E. Sonbas (NASA/GSFC/Adiyaman Univ.), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU), V. Mangano (INAF-IASFPA), C. Pagani (U Leicester), K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of the Swift Team: At 11:58:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120211A (trigger=514586). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 87.751, -24.759 which is RA(J2000) = 05h 51m 00s Dec(J2000) = -24d 45' 32" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 30 sec. The peak count rate was ~300 counts/sec (15-350 keV), at ~3 sec after the trigger. The XRT began observing the field at 12:00:27.6 UT, 119.5 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 87.75354, -24.77477 which is equivalent to: RA(J2000) = 05h 51m 00.85s Dec(J2000) = -24d 46' 29.2" with an uncertainty of 3.9 arcseconds (radius, 90% containment). This location is 57 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.73 x 10^20 cm^-2 (Kalberla et al. 2005). UVOT took a finding chart exposure of 150 seconds with the White filter starting 123 seconds after the BAT trigger. No credible 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 19.6 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 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03. Burst Advocate for this burst is E. Sonbas (edasonbas AT yahoo.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN 12921 table
GRB_name GRB120211A
GCN_number 12921
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12921 SUBJECT: GRB 120211A - Faulkes Telescope South Observations DATE: 12/02/11 15:02:33 GMT FROM: Francisco Virgili at Liverpool John Moores U F. J. Virgili, C.G. Mundell, I.A. Steele, R.J. Smith, C.J. Mottram, D.F. Bersier, S. Kobayashi (Liverpool, JMU), A. Gomboc, J. Japelj, D. Kopac (U. Ljubljana), C. Guidorzi (U. Ferrara), A. Melandri (INAF-OAB) report: "The 2-m Faulkes Telescope South responded robotically to followup GRB120211A (SWIFT trigger 514586; Sonbas et al. GCN 12920) 3.77 min after the GRB trigger time. No optical counterpart within the XRT error circle is detected to the following conservative limits: R > 21.5 mag (vs USNOB1) at 0.51 hrs from BAT trigger (total exposure = 720 s) i' > 20.4 mag (vs USNOB1) at 0.58 hrs from BAT trigger (total exposure = 700 s) We also note the presence of a USNOB-1 object lying on the XRT error circle border: 05:51:00.786, -24:46:23.86, with R2=20.19 and I=18.74 mag This message may be cited"
GCN 12922 table
GRB_name GRB120211A
GCN_number 12922
Detection_method Swift-XRT Det
ra 87.7537°
decl -24.7752°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12922 SUBJECT: GRB 120211A: Enhanced Swift-XRT position DATE: 12/02/11 15:52:16 GMT FROM: Phil Evans at U of Leicester M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team. Using 1401 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120211A, 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 = 87.75371, -24.77521 which is equivalent to: RA (J2000): 05h 51m 0.89s Dec (J2000): -24d 46' 30.8" with an uncertainty of 1.9 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN 12923 table
GRB_name GRB120211A
GCN_number 12923
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 12923 SUBJECT: GRB 120211A: MITSuME Okayama Ks-band upper limit DATE: 12/02/11 16:11:45 GMT FROM: Kenshi Yanagisawa at OAO/NAOJ Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu, Kiichi Okita (OAO/NAOJ), Michitoshi Yoshida (Hiroshima-U), Kouji Ohta(Kyoto-U), and Nobuyuki Kawai(Tokyo Tech.) report on behalf of the MITSuME collaboration: We observed the field of GRB120211A (Sonbas et al., GCNC 12920) in Ks-band with a wide-field NIR camera at Okayama Astrophysical Observatory (Japan). The camera has an effective aperture of 0.91m. Observations started from 12:08 UT on 11th Feburuary, 10.1 min after the BAT trigger, to 13:22 UT. The total exposure of 60 min was successfully obtained. In our co-add image, we did not find any new point source within the enhanced XRT error circle (Goad et al., GCNC 12922) down to limiting magnitude of Ks= 15.5(Vega, S/N=3). The photometric calibration was made against 2MASS field stars. T0+[min] MID-UT T-EXP[min] Ks --------------------------------------------------- +47.1 12:45 60.0 >15.5 (S/N=3) --------------------------------------------------- T0+ : Elapsed time after the burst [sec] T-EXP: Total Exposure time [sec]
GCN 12924 table
GRB_name GRB120211A
GCN_number 12924
Detection_method Swift-BAT Det
ra 87.7810°
decl -24.7950°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12924 SUBJECT: GRB 120211A: Swift-BAT refined analysis DATE: 12/02/11 16:37:40 GMT FROM: Scott Barthelmy at NASA/GSFC T. N. Ukwatta (MSU) S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), E. Sonbas (NASA/GSFC/Adiyaman U), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120211A (trigger #514586) (Sonbas, et al., GCN Circ. 12920). The BAT ground-calculated position is RA, Dec = 87.781, -24.795 deg, which is RA(J2000) = 05h 51m 07.5s Dec(J2000) = -24d 47' 43.6" with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%. The mask-weighted light curve shows 2 or 3 overlapping peaks starting at ~T-10 sec, peaking at ~T+42 sec, and ending at ~T+140 sec. T90 (15-350 keV) is 61.7 +- 6.4 sec (estimated error including systematics). The time-averaged spectrum from T-2.34 to T+64.10 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.50 +- 0.22. The fluence in the 15-150 keV band is 8.1 +- 1.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+40.97 sec in the 15-150 keV band is 0.5 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/514586/BA/
GCN 12925 table
GRB_name GRB120211A
GCN_number 12925
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12925 SUBJECT: GRB 120211A: MASTER early optical observations DATE: 12/02/11 19:13:43 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka H.Levato, C.Mallamaci, C.Saffe ICATE (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio), San Juan, San Juan University, Felix Aguilar Observatory, Argentina MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB120211A (SWIFT trigger 514586; Sonbas et al. GCN 12920) 77 sec after GRB time at 2012-02-11 11:59:45.629 UT. On our first (20s exposure) set we haven't found optical transient within SWIFT error-box (ra=05 51 00 dec=-24 45 36 ). The 5-sigma upper limit has been about 16.3 mag. The message may be cited.
GCN 12926 table
GRB_name GRB120211A
GCN_number 12926
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12926 SUBJECT: GRB 120211A: Swift/UVOT Upper Limits DATE: 12/02/11 19:42:47 GMT FROM: Paul Kuin at MSSL N. P. M. Kuin (MSSL-UCL) and E. Sonbas (NASA/GSFC/ Adiyaman_Univ.) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 120211A 123 s after the BAT trigger (Sonbas et al., GCN Circ. 12920). No optical afterglow consistent with the XRT enhanced position (Goad et al., GCN Circ. 12922) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 123 273 147 >21.1 u_FC 281 531 246 >20.9 white 123 1528 392 >21.6 v 612 1577 117 >19.7 b 537 1503 97 >20.3 u 281 1478 324 >20.9 w1 662 1626 117 >20.2 m2 637 1602 117 >20.1 w2 588 1553 117 >20.0 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
GCN 12927 table
GRB_name GRB120211A
GCN_number 12927
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12927 SUBJECT: GRB 120211A: Swift-XRT refined Analysis DATE: 12/02/12 00:11:04 GMT FROM: Phil Evans at U of Leicester V. Mangano (INAF-IASFPA), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU) and E. Sonbas report on behalf of the Swift-XRT team: We have analysed 6.4 ks of XRT data for GRB 120211A (Sonbas et al. GCN Circ. 12920), from 133 s to 13.2 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 12922). The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=1.47 (+0.33, -0.22). At T+1267 s the decay flattens to an alpha of -0.14 (+0.20, -1.36) before breaking again at T+11.0 ks to a final decay with index alpha=6.6 (+1.4, -4.1). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.29 (+0.21, -0.20). The best-fitting absorption column is 6.5 (+6.5, -4.8) x 10^20 cm^-2, consistent with the Galactic value of 1.7 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.4 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 6.5 (+6.5, -4.8) x 10^20 cm^-2 Galactic foreground: 1.7 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.29 (+0.21, -0.20) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00514586. This circular is an official product of the Swift-XRT team.
GCN 12928 table
GRB_name GRB120211A
GCN_number 12928
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12928 SUBJECT: GRB 120211A, optical observations DATE: 12/02/12 05:01:42 GMT FROM: Shashi Bhushan Pandey at ROTSE Brajesh Kumar, Vijay Bhatt and S. B. Pandey (ARIES Nainital, India, on behalf of larger Indian GRB collaboration). The swift GRB 120211A (trigger =514586, Sonbas et al., GCN 12920) was observed with the 104-cm telescope at ARIES Nainital. We took a sequence of images starting at 13:31:26 UT on 11 Feb in R_c and I_c pass-bands with an exposure time of 300 sec each. Photometry of the co-added R_c frame (300 sec x 4), in comparison to the nearby USNO- B1 stars, did not detect any new source within the XRT error-box down to a limiting magnitude of ~ 20 mag. This massage may be cited.
GCN 12929 table
GRB_name GRB120211A
GCN_number 12929
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 12929 SUBJECT: GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits DATE: 12/02/12 08:25:15 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, (OAO, NAOJ), H. Hanayama (IAO, NAOJ), K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), T. Miyaji J. Watanabe, (IAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 120211A (Sonbas et al., GCNC 12920) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory and the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. We did not find any new point source within the enhanced XRT error circle (Goad et al., GCNC 12922) in all the three bands. Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. Okayama Astrophysical Observatory: The observation started on 012-02-11 11:59:56 UT (~1.5 min after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.00444 12:04:52 540.0 >19.5 >19.5 >19.0 0.04267 12:59:55 6360.0 >20.3 >20.2 >19.7 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec] Ishigakijima Astronomical Observatory: The observation started on 2012-02-11 12:43:55 UT (~45 min after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.04104 12:57:34 1260.0 >20.8 >20.5 >19.0 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 12931 table
GRB_name GRB120211A
GCN_number 12931
Detection_method GROND
Circular_text TITLE: GCN CIRCULAR NUMBER: 12931 SUBJECT: GRB 120211A: GROND Upper limits DATE: 12/02/12 09:30:37 GMT FROM: Jochen Greiner at MPI J. Elliott, V. Sudilovsky and J. Greiner (all MPE Garching) report on behalf of the GROND team: We observed the field of GRB 120211A (Swift trigger 514586; Sonbas et al., GCN 12920) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory (Chile). Observations started at 00:27 UT on 12 February 2012, 12.5 hours after the GRB trigger. They were performed at an average seeing of 1.3" and at an average airmass of 1.0. A total integration time of 90 minutes and 76 minutes was obtained in g'r'i'z' and JHK respectively. We do not detect a source within the Swift-XRT error circle reported by Goad et al. (GCN 12922) down to the following 3-sigma limits (all AB): g' > 25.8 r' > 25.7 i' > 25.0 z' > 24.1 J > 21.7 H > 21.0 K > 19.9 The given limits are derived based on calibrating the images against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
GCN 12953 table
GRB_name GRB120211A
GCN_number 12953
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12953 SUBJECT: GRB 120211A : LOAO optical observations DATE: 12/02/13 15:45:18 GMT FROM: Minsung Jang at Seoul National U Jang, M., Im, M. (SNU), & Urata, Y. (NCU) We observed GRB 120211A (Sonbas et al., GCN 12920) in SDSS i,z-bands with a 1 m telescope at Mt. Lemmon, Arizona, U.S. The obsevation started at 04:03:00 2012-02-12 UT, ~ 17 hours after the burst alert. We took 4 frames for each filter alternatively with the exposure time 300s. No afterglow candidate was found in the enhanced XRT position (Goad et al., GCN12922) in stacked images of both i and z. We thank the LOAO operator, J. Yoon for this observation.