GRB120819A

This page lists all entries on GRB120819A in GRBweb

Summary IPN Swift GCN 13681 GCN 13682 GCN 13683 GCN 13684 GCN 13685 GCN 13686 GCN 13687 GCN 13688 GCN 13689 GCN 13690 GCN 13691 GCN 13702 GCN 13713

Summary table
Variable Value Source
T0 13:10:14 UTC GCN_circulars,Swift Det
ra 235.9075° Swift
decl -7.3091° Swift
pos_error 2.20e-04° Swift
T90 71.0 s Swift
T90_start 13:10:14 UTC Swift
fluence 1.40e-06 erg/cm² Swift
T100 71.0 s
GBM_located False
mjd 56158.54877314815 GCN_circulars,Swift Det
IPN table
GRB_name GRB120819A
ra 235.8875°
decl -7.1333°
pos_error 5.00e-02°
Swift table
GRB_name GRB120819A
t_trigger 13:10:14 UTC
ra 235.9075°
decl -7.3091°
pos_error 2.20e-04°
T90 71.0 s
fluence 1.40e-06 erg/cm²
GCN 13681 table
GRB_name GRB120819A
GCN_number 13681
Detection_method Swift Det
t_trigger 13:10:14 UTC
ra 235.8880°
decl -7.3050°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13681 SUBJECT: GRB 120819A: Swift detection of a burst DATE: 12/08/19 13:22:35 GMT FROM: Scott Barthelmy at NASA/GSFC A. P. Beardmore (U Leicester), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), F. E. Marshall (NASA/GSFC), C. J. Mountford (U Leicester), C. Pagani (U Leicester) and K. L. Page (U Leicester) report on behalf of the Swift Team: At 13:10:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120819A (trigger=531428). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 235.888, -7.305 which is RA(J2000) = 15h 43m 33s Dec(J2000) = -07d 18' 16" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several peaks with a duration of about 30 sec. The peak count rate was ~1600 counts/sec (15-350 keV), at ~5 sec after the trigger. The XRT began observing the field at 13:12:50.5 UT, 156.2 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 235.90848, -7.30910 which is equivalent to: RA(J2000) = 15h 43m 38.04s Dec(J2000) = -07d 18' 32.8" with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 74 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 in excess of the Galactic value (8.93 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 3.4 (+2.74/-2.85) x 10^21 cm^-2 (90% confidence). UVOT took a finding chart exposure of 150 seconds with the White filter starting 158 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 77% 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 0.17. Burst Advocate for this burst is A. P. Beardmore (apb AT star.le.ac.uk). 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 13682 table
GRB_name GRB120819A
GCN_number 13682
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13682 SUBJECT: GRB 120819A: MASTER optical observations DATE: 12/08/19 16:10:19 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, A.Kuznetsov, 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.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB120819A (Beardmore et al., GCN 13681) sec after GRB time at 2012-08-19 13:12:10.052 UT. On our first (20s exposure) set we haven't found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 16.5 mag The reduction is continuated. The message may be cited.
GCN 13683 table
GRB_name GRB120819A
GCN_number 13683
Detection_method Other
ra 235.9077°
decl -7.3091°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13683 SUBJECT: GRB 120819A: afterglow candidate from NOT DATE: 12/08/19 23:13:43 GMT FROM: Giorgos Leloudas at Dark Cosmology Centre D. Malesani (DARK/NBI), G. Leloudas (OKC Stockholm and DARK/NBI), D. Xu (WIS), J. P. U. Fynbo (DARK/NBI), P. Jakobsson (Univ. Iceland), S. Geier (NOT and DARK/NBI) report on behalf of a larger collaboration: We observed the field of GRB 120819A (Beardmore et al., GCN 16381) with the NOT equipped with ALFOSC. Observations were carried out in the R and z bands, for a total of 20 and 40 min exposure, respectively. Within the current XRT position (see http://www.swift.ac.uk/xrt_positions/index.php), we detect a source at the following coordinates (J2000): RA = 15:43:37.84 Dec = -07:18:32.9 with an error of about 0.5". Assuming R = 18.05 for the nearby USNO star at RA = 15:43:38.183, Dec = -07:17:51.72, the object has R = 23.0 +- 0.1. The mean time of the R-band observation is Aug 19.913 UT, that is 8.75 hr after the GRB. Given the faintness of the source and the lack of information on its temporal behaviour, we cannot state whether this object is related to GRB 120819A.
GCN 13684 table
GRB_name GRB120819A
GCN_number 13684
Detection_method Swift-XRT Det
ra 235.9076°
decl -7.3091°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13684 SUBJECT: GRB 120819A: Enhanced Swift-XRT position DATE: 12/08/20 04:49:25 GMT FROM: Phil Evans at U of Leicester P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team. Using 2836 s of XRT Photon Counting mode data and 3 UVOT images for GRB 120819A, 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 = 235.90756, -7.30909 which is equivalent to: RA (J2000): 15h 43m 37.81s Dec (J2000): -07d 18' 32.7" with an uncertainty of 1.8 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 13685 table
GRB_name GRB120819A
GCN_number 13685
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 13685 SUBJECT: GRB 120819A: MITSuME Okayama Optical upper limits DATE: 12/08/20 04:58:44 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, 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 120819A (Beardmore et al., GCNC 13681) 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 2012-08-19 13:12:11 UT (~2.0 min after the burst) We did not find any new point source within the enhanced XRT circle (Beardmore et al., GCNC 13681) in all the three bands. We also could not detect the previously reported afterglow (Malesani et al., GCNC 13683). Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.01186 13:27:19 1620.0 >19.1 >19.4 >18.8 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 13686 table
GRB_name GRB120819A
GCN_number 13686
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 13686 SUBJECT: GRB 120819A: MITSuME Ishigakijima upper limits DATE: 12/08/20 04:58:56 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, 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 120819A (Beardmore et al., GCNC 13681) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. The observation started on 2012-08-19 13:13:11 UT, (~3.0 min after the burst) We did not find any new point source within the enhanced XRT circle (Beardmore et al., GCNC 13681) in all the three bands. We also could not detect the previously reported afterglow (Malesani et al., GCNC 13683). Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.01544 13:32:28 1980.0 >21.5 >21.6 >20.3 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 13687 table
GRB_name GRB120819A
GCN_number 13687
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13687 SUBJECT: GRB 120819A: Swift-XRT refined Analysis DATE: 12/08/20 05:47:04 GMT FROM: Phil Evans at U of Leicester O.M. Littlejohns (U. Leicester), V. D'Elia (ASDC), A. Maselli (INAF-IASFPA), V. Mangano (INAF-IASFPA), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and A.P. Beardmore report on behalf of the Swift-XRT team: We have analysed 10 ks of XRT data for GRB 120819A (Beardmore et al. GCN Circ. 13681), from 159 s to 23.0 ks after the BAT trigger. The data comprise 67 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 13684). The light curve can be modelled with a power-law decay with a decay index of alpha=1.75 (+0.12, -0.09). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.7 (+/-0.4). The best-fitting absorption column is 3.3 (+2.0, -1.5) x 10^21 cm^-2, in excess of the Galactic value of 8.9 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 4.2 x 10^-11 (6.0 x 10^-11) erg cm^-2 count^-1. A summary of the WT-mode spectrum is thus: Total column: 3.3 (+2.0, -1.5) x 10^21 cm^-2 Galactic foreground: 8.9 x 10^20 cm^-2 Excess significance: 2.6 sigma Photon index: 1.7 (+/-0.4) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00531428. This circular is an official product of the Swift-XRT team.
GCN 13688 table
GRB_name GRB120819A
GCN_number 13688
Detection_method GROND
Circular_text TITLE: GCN CIRCULAR NUMBER: 13688 SUBJECT: GRB 120819A: GROND afterglow confirmation DATE: 12/08/20 07:29:10 GMT FROM: Vladimir Sudilovsky at MPE V. Sudilovsky (MPE Garching), S. Klose (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team: We observed the field of GRB 120819A (Swift trigger 531428; Beardmore et al., GCN 13681) simultaneously in g'r'i'z'JHKs 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 23:46 UT on 2012-08-19, 10.5 hrs after the GRB trigger. Based on co-added images spanning 2 hours taken at a mean airmass of 1.3 and seeing of 1.6", we confirm the presence of the NOT afterglow candidate (Malesani et al., GCN 13683). We derive preliminary magnitudes (all AB system) of this source: g' = 23.7 +- 0.1 r' = 23.1 +- 0.1 i' = 22.5 +- 0.1 z' = 22.2 +- 0.1 J = 21.5 +- 0.3 H > 20.2 Ks > 20.1 We note that although these magnitudes do not suggest fading, the large uncertainties from the USNO calibration used by Malesani et al. do not preclude this possibility. The consistency with the enhanced XRT position (Evans et al., GCN 13684), combined with the power-law like SED, confirm that this source is the afterglow of GRB 120819A. The g' band detection does not suggest substantial Ly-alpha or dust effects, implying that the redshift of this burst is likely smaller than 3.0. The magnitudes are derived based on GROND zeropoints (g'r'i'z') and 2MASS stars (JHK). The magnitudes are not corrected for the expected Galactic reddening along the line of sight of E_(B-V)= 0.16 mag (Schlegel et al. 1998).
GCN 13689 table
GRB_name GRB120819A
GCN_number 13689
Detection_method Swift-BAT Det
ra 235.8870°
decl -7.3040°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13689 SUBJECT: GRB 120819A: Swift-BAT refined analysis DATE: 12/08/20 12:25:42 GMT FROM: Scott Barthelmy at NASA/GSFC T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), 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), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 120819A (trigger #531428) (Beardmore, et al., GCN Circ. 13681). The BAT ground-calculated position is RA, Dec = 235.887, -7.304 deg, which is RA(J2000) = 15h 43m 32.8s Dec(J2000) = -07d 18' 13.5" with an uncertainty of 2.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 30%. The mask-weighted light curve shows multiple peaks starting at ~T-2 sec, with the largest peak at ~T+0 sec, and returning to baseline at ~T+180 sec. T90 (15-350 keV) is 71 +- 21 sec (estimated error including systematics). The time-averaged spectrum from T+4.42 to T+82.88 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.49 +- 0.23. The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+6.20 sec in the 15-150 keV band is 0.8 +- 0.3 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/531428/BA/
GCN 13690 table
GRB_name GRB120819A
GCN_number 13690
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13690 SUBJECT: GRB 120819A: Bassano Bresciano Observatory optical observations DATE: 12/08/20 13:05:16 GMT FROM: Ulisse Quadri at Bassano Bresciano Obs U.Quadri, L.Strabla, R.Girelli and A.Quadri report: We imaged the field of GRB 120819A detected by SWIFT(trigger 531428) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy. The observations started 6h 35min. after the GRB trigger(delay due to expecting the night) with our Schmidt telescope D=400mm F/D=3.1. Weather conditions were good. We co-added 2 series of 15 unfiltered CCD exposures of 120s each. We did not appear any reasonable optical counterpart in the error box of the XRTcandidate (Beardmore et al., GCNC 13681) at our limiting magnitude. Start End M.lim. 395min 454min 19.5 Magnitudes were estimated with the USNO-B1 cat. The message may be cited.
GCN 13691 table
GRB_name GRB120819A
GCN_number 13691
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13691 SUBJECT: GRB 120819A: MASTER final limits DATE: 12/08/20 13:27:06 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, D.Denisenko, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski,N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov Sternberg Astronomical Institute, Moscow State University V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB120819A (Beardmore et al., GCN 13681) 25 sec after notice time and 115 sec after GRB time at 2012-08-19 13:12:10.052 UT (Yurkov et. al, GCN 13682). Unfiltered observations were carried out on high zenith distance (78 deg. at the observations beginning moment and above). The unfiltered magnitude is calibrated relative to USNO B1.0 (0.8 R + 0.2 B). After the data processing we have the following results: Start Middle Stop T-Tgrb Coadd Exp.time Limit 2012-08-19 13:12:10 13:12:20 13:12:30 125 1 20 16.5 2012-08-19 13:12:10 13:15:00 13:17:51 285 6 140 17.8 2012-08-19 13:19:08 13:39:35 14:00:02 1785 10 1800 18.5 The message may be cited.
GCN 13702 table
GRB_name GRB120819A
GCN_number 13702
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13702 SUBJECT: GRB 120819A: Swift/UVOT Upper Limits DATE: 12/08/29 21:35:17 GMT FROM: Frank Marshall at GSFC F. E. Marshall (NASA/GSFC) and A. P. Beardmore (U. Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 120819A 158 s after the BAT trigger (Beardmore et al., GCN Circ. 13681). No optical afterglow consistent with the optical position (Malesani et al. GCN Circ. 13683) 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 158 308 147 >21.1 white 158 5439 541 >21.7 v 4214 22619 1278 >20.9 b 3598 11864 1164 >21.1 u 4829 17638 1858 >21.6 w1 4625 16836 1998 >21.4 m2 4418 22980 1629 >21.7 w2 4009 21706 1279 >21.8 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.17 in the direction of the burst (Schlegel et al. 1998).
GCN 13713 table
GRB_name GRB120819A
GCN_number 13713
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13713 SUBJECT: GRB 120819A: optical upper limit DATE: 12/09/04 13:14:01 GMT FROM: Alexei Pozanenko at IKI, Moscow Yu. Krugly, V. Chiorny (Institute of Astronomy of Kharkiv National University), A. Volnova (SAI MSU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger collaboration: We observed the afterglow of GRB 120819A (Beardmore et al. GCN 13681) with 0.7m telescope of Institute of Astronomy, Kharkiv National Univ. starting on Aug. 19 (UT) 18:27:41. A set of images were taken in R-filter. We do not detect optical afterglow (Malesani et al. GCN 13683; Sudilovsky et al.GCN 13688). The photometry is based on the nearby USNO-B1.0 (R2) stars: T0+, Filter Exposure, OT, UL (3 sigma) mid, d (s) 0.22102 R 2160 n/d 20.3