GRB111204A

This page lists all entries on GRB111204A in GRBweb

Summary IPN Swift GCN 12612 GCN 12614 GCN 12616 GCN 12618 GCN 12620 GCN 12621 GCN 12622 GCN 12624

Summary table
Variable Value Source
T0 13:37:28 UTC GCN_circulars,Swift Det
ra 336.6284° Swift
decl -31.3749° Swift
pos_error 2.46e-04° Swift
T90 48.0 s Swift
T90_start 13:37:28 UTC Swift
fluence 4.70e-07 erg/cm² Swift
T100 48.0 s
GBM_located False
mjd 55899.56768518518 GCN_circulars,Swift Det
IPN table
GRB_name GRB111204A
ra 336.6417°
decl -31.4000°
pos_error 5.00e-02°
Swift table
GRB_name GRB111204A
t_trigger 13:37:28 UTC
ra 336.6284°
decl -31.3749°
pos_error 2.46e-04°
T90 48.0 s
fluence 4.70e-07 erg/cm²
GCN 12612 table
GRB_name GRB111204A
GCN_number 12612
Detection_method Swift Det
t_trigger 13:37:28 UTC
ra 336.6410°
decl -31.3950°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12612 SUBJECT: GRB 111204A: Swift detection of a burst DATE: 11/12/04 13:50:44 GMT FROM: David Palmer at LANL E. Sonbas (GSFC/USRA/Adiyaman Univ.), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU), C. A. Swenson (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 13:37:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111204A (trigger=509018). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 336.641, -31.395 which is RA(J2000) = 22h 26m 34s Dec(J2000) = -31d 23' 41" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 80 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~50 sec after the trigger. The XRT began observing the field at 13:40:08.0 UT, 159.7 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 336.62912, -31.37514 which is equivalent to: RA(J2000) = 22h 26m 30.99s Dec(J2000) = -31d 22' 30.5" with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 80 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. We cannot determine whether the source is fading at the present time. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.08 x 10^20 cm^-2 (Kalberla et al. 2005). UVOT took a finding chart exposure of 150 seconds with the White filter starting 143 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 34% 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 0.01. 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 OPS NOTE(04dec11): Per author's request, the contact address for ES has been changed to edasonbas@yahoo.com .]
GCN 12614 table
GRB_name GRB111204A
GCN_number 12614
Detection_method Swift-XRT Det
ra 336.6285°
decl -31.3748°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12614 SUBJECT: GRB 111204A: Enhanced Swift-XRT position DATE: 11/12/04 16:40:38 GMT FROM: Phil Evans at U of Leicester A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team. Using 175 s of XRT Photon Counting mode data and 1 UVOT images for GRB 111204A, 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 = 336.62848, -31.37479 which is equivalent to: RA (J2000): 22h 26m 30.84s Dec (J2000): -31d 22' 29.3" with an uncertainty of 2.1 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 12616 table
GRB_name GRB111204A
GCN_number 12616
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12616 SUBJECT: GRB 111204A: MASTER optical observations DATE: 11/12/04 18:06:51 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs A.V. Parhomenko, A. Tlatov, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev,E.Konstantinov, Irkutsk State University 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.Sankovich Sternberg Astronomical Institute, Moscow State University V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB111204A (Sonbas et al., GCN Circ 12612) 115 sec after GRB trigger time after sunset. Unfortunately our first (20s exposure) images are saturated. The first unsaturated images was 2828 sec after GRB time at 2011-12-04 14:24:36.065 UT. On our 180s exposure white+polarizator set we haven't found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 15.0 mag. Our coaded image (started at 2011-12-04 15:00:58 UT, 3240s effective exposition) has limit 19.2 mag. The message may be cited.
GCN 12618 table
GRB_name GRB111204A
GCN_number 12618
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12618 SUBJECT: GRB 111204A: Swift/UVOT Upper Limits DATE: 11/12/04 21:19:05 GMT FROM: Samantha Oates at MSSL S. R. Oates (MSSL-UCL) and E. Sonbas (GSFC/USRA/Adiyaman_Univ.) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 111204A 143 s after the BAT trigger (Sonbas et al., GCN Circ. 12612). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ. 12614) 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 143 293 147 >20.4 white 143 5439 541 >21.6 v 4214 5851 393 >19.6 b 3599 11889 1054 >20.8 u 302 11204 1116 >21.3 w1 4624 10291 1133 >20.7 m2 4419 15631 869 >21.1 w2 4009 5646 393 >20.8 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
GCN 12620 table
GRB_name GRB111204A
GCN_number 12620
Detection_method Swift-BAT Det
ra 336.6510°
decl -31.4140°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12620 SUBJECT: GRB 111204A, Swift-BAT refined analysis DATE: 11/12/04 23:02:55 GMT FROM: Tilan Ukwatta at GSFC/GWU C. B. Markwardt (GSFC), 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), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), E. Sonbas (GSFC/USRA/Adiyaman Univ.), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 111204A (trigger #509018) (Sonbas, et al., GCN Circ. 12612). The BAT ground-calculated position is RA, Dec = 336.651, -31.414 deg which is RA(J2000) = 22h 26m 36.2s Dec(J2000) = -31d 24' 49.4" with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%. The mask-weighted light curve shows two peaks. Initial peak starts at the trigger time and last until ~T+10 sec. The second broad peak starts at ~T+43 sec, peaks at ~T+48 sec, and ends at ~T+90 sec. T90 (15-350 keV) is 48.0 +/- 22.6 sec (estimated error including systematics). The time-averaged spectrum from T+33.0 to T+81.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.83 +/- 0.30. The fluence in the 15-150 keV band is 4.7 +/- 0.9 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+56.50 sec in the 15-150 keV band is 0.3 +/- 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/509018/BA/
GCN 12621 table
GRB_name GRB111204A
GCN_number 12621
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12621 SUBJECT: GRB 111204A: Swift-XRT refined Analysis DATE: 11/12/05 01:50:04 GMT FROM: Phil Evans at U of Leicester M.C. Stroh (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), V. D'Elia (ASDC), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU) and E. Sonbas report on behalf of the Swift-XRT team: We have analysed 8.4 ks of XRT data for GRB 111204A (Sonbas et al. GCN Circ. 12612), from 157 s to 27.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 12614). The light curve can be modelled with a power-law decay with a decay index of alpha=1.86 (+0.31, -0.17). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.2 (+/-0.4). The best-fitting absorption column is 9 (+16, -8) x 10^20 cm^-2, consistent with the Galactic value of 1.1 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 6.0 x 10^-11 (6.4 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 9 (+16, -8) x 10^20 cm^-2 Galactic foreground: 1.1 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.2 (+/-0.4) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00509018. This circular is an official product of the Swift-XRT team.
GCN 12622 table
GRB_name GRB111204A
GCN_number 12622
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 12622 SUBJECT: GRB 111204A: GROND Observations DATE: 11/12/05 08:13:42 GMT FROM: Alexander Kann at TLS Tautenburg D. A. Kann (Tautenburg Observatory), F. Olivares E., and J. Greiner, (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 111204A (Swift trigger 509018; Sonbas et al., GCN #12612) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP, 120, 405) mounted at the 2.2 m ESO/MPI telescope at La Silla Observatory (Chile). Observations started on December 5, 2011, at 00:38 UT, 11 hours after the GRB trigger, during twilight. They were performed at an average seeing of 1".1 and at an airmass of 1.2 - 2.2. Based on co-added images of 5900 s integration time in g'r'i'z' and 4800 s in JHK, centered 0.5253 days after the trigger, no new sources within the enhanced 1".9 XRT error circle (RA = 22:26:30.81, Dec. = -31:22:29.3; Beardmore et al., GCN #12614, updated version from the Enhanced XRT Position page) are detected, and the following specific upper limits (all in the AB magnitude system) are found: g' > 24.5 r' > 24.9 i' > 24.4 z' > 24.0 J > 22.3 H > 21.6 K > 20.5 Magnitudes were calibrated against GROND zeropoints in g'r'i'z' and 2MASS field stars in JHK. No corrections for the expected Galactic foreground extinction were made, which correspond to a reddening of E(B-V)=0.012 mag in the direction of the burst (Schlegel et al. 1998).
GCN 12624 table
GRB_name GRB111204A
GCN_number 12624
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12624 SUBJECT: GRB 111204A: TNG NIR observations DATE: 11/12/05 20:51:16 GMT FROM: Paolo D'Avanzo at INAF-OAB D. Fugazza, S. Covino, A. Melandri (INAF-OAB), V. D'Elia (INAF-OAR), P. D'Avanzo, S. Campana, G. Tagliaferri (INAF-OAB) and E. Palazzi (INAF-IASFBo) on behalf of a larger collaboration report: We observed the field of GRB 111204A (Sonbas et al. GCN 12612) with the 3.6m TNG equipped with the NICS near-infrared camera. A sequence of JHK band images were acquired starting on Dec 04.792 UT (i.e. ~5.4 hours after the burst event) lasting 15, 10 and 20 minutes, respectively. We do not detect any object inside the enhanced XRT position (Beardmore et al. GCN 12614) down to the following limiting magnitudes (3sigma c.l., calibrated against the 2MASS catalogue): J > 19.7 H > 18.8 Ks > 18.8 We thank the TNG staff for their support, in particular Luca di Fabrizio and Gianni Tessicini.