GRB120802A

This page lists all entries on GRB120802A in GRBweb

Summary IPN Swift GCN 13555 GCN 13556 GCN 13557 GCN 13558 GCN 13559 GCN 13561 GCN 13562 GCN 13563 GCN 13564 GCN 13578 GCN 13593 GCN 13609 GCN 13712

Summary table
Variable Value Source
T0 8:00:51 UTC GCN_circulars,Swift Det
ra 44.8426° Swift
decl 13.7683° Swift
pos_error 1.81e-04° Swift
T90 50.0 s Swift
T90_start 8:00:51 UTC Swift
fluence 1.90e-06 erg/cm² Swift
redshift 3.7960 GCN_circulars,Other
T100 50.0 s
GBM_located False
mjd 56141.33392361111 GCN_circulars,Swift Det
IPN table
GRB_name GRB120802A
ra 44.8500°
decl 13.7500°
pos_error 5.00e-02°
redshift 3.7960
Swift table
GRB_name GRB120802A
t_trigger 8:00:51 UTC
ra 44.8426°
decl 13.7683°
pos_error 1.81e-04°
T90 50.0 s
fluence 1.90e-06 erg/cm²
redshift 3.7960
GCN 13555 table
GRB_name GRB120802A
GCN_number 13555
Detection_method Swift Det
t_trigger 8:00:51 UTC
ra 44.8490°
decl 13.7570°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13555 SUBJECT: GRB 120802A: Swift detection of a burst DATE: 12/08/02 08:14:00 GMT FROM: David Palmer at LANL S. T. Holland (STScI), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), C. Guidorzi (U Ferrara), K. L. Page (U Leicester), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC) and T. Sakamoto (NASA/UMBC) report on behalf of the Swift Team: At 08:00:51 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120802A (trigger=529486). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 44.849, +13.757 which is RA(J2000) = 02h 59m 24s Dec(J2000) = +13d 45' 26" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two overlapping FRED peaks with a duration of about 20 sec. The peak count rate was ~3500 counts/sec (15-350 keV), at ~8 sec after the trigger. The XRT began observing the field at 08:02:16.3 UT, 84.8 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 44.84120, 13.76787 which is equivalent to: RA(J2000) = 02h 59m 21.89s Dec(J2000) = +13d 46' 04.3" with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 47 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 9.65 x 10^20 cm^-2 (Kalberla et al. 2005). UVOT took a finding chart exposure of 150 seconds with the White filter starting 86 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 0.15. Burst Advocate for this burst is S. T. Holland (sholland AT stsci.edu). 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 13556 table
GRB_name GRB120802A
GCN_number 13556
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13556 SUBJECT: GRB 120802A: optical uper limit in ISON-NM observatory DATE: 12/08/02 10:06:08 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 120802A (Holland et al., GCN 13555) with 0.45-m telescope f ISON-NM observatory starting on Aug. 02 (UT) 08:13:18, i.e. 12.5 minutes after burst trigger. We took several unfiltered images of 30 s exposure. We do not detect any source within XRT error circle (Holland et al., GCN 13555) in any co-added frames. The preliminary photometry of co-added frames is based on the USNO-B1.0 (R2) nearby stars: T_start, Exposure, OT, Upper Limit (3sigma) (UT) (s) 08:13:18 10x30 n/d 17.5 08:13:18 20x30 n/d 17.7 08:13:18 29x30 n/d 18.1 Observations are continued.
GCN 13557 table
GRB_name GRB120802A
GCN_number 13557
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13557 SUBJECT: GRB 120802A: MASTER optical observations DATE: 12/08/02 10:14:46 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs H. Levato and C. Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) C. Mallamaci, C. Lopez and F. Podest Observatorio Astronomico Felix Aguilar (OAFA) E. Gorbovskoy, V. Lipunov, V. Kornilov, D. Denisenko, A. Kuznetsov, D. Kuvshinov, A. Belinski, N. Tyurina, N. Shatskiy, P. Balanutsa, D. Zimnukhov, V.V. Chazov Lomonosov Moscow State University, Sternberg Astronomical Institute A. Tlatov, A.V. Parhomenko, D. Dormidontov, V. Sennik Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, S. Yazev, N.M. Budnev, O. Gres, O. Chuvalaev, V.A. Poleshchuk Irkutsk State University V. Yurkov, Yu. Sergienko, D. Varda, E. Sinyakov Blagoveschensk Educational State University, Blagoveschensk V. Krushinski, I. Zalozhnich, A. Popov, A. Bourdanov, A. Punanova Ural Federal University MASTER-ICATE robotic very wide field cameras (FOV=2x384 square degrees, D=72mm, f/1.2, 1 pix = 22 arcsec, http://observ.pereplet.ru) located in Argentina (Observatorio Astronomico Felix Aguilar, http://93.180.27.230:8080/) were pointed to the GRB120802A (Holland et al, GCN 13555) 21 s after notice time and 43 s after GRB time at 2012-08-02 08:01:34 UT under full Moon. We haven't found optical transient within SWIFT error-box our first (5 s exposure) set. The 5-sigma upper limit has been about 10.6 mag The 5-sigma upper limit on coadd first 42 images is about 12.0 mag. Our cameras are continuously imaging the sky with 5 sec exposures. This message can be cited.
GCN 13558 table
GRB_name GRB120802A
GCN_number 13558
Detection_method Swift-XRT Det
ra 44.8419°
decl 13.7681°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13558 SUBJECT: GRB 120802A: Enhanced Swift-XRT position DATE: 12/08/02 11:57:38 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 539 s of XRT Photon Counting mode data and 1 UVOT images for GRB 120802A, 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 = 44.84185, +13.76805 which is equivalent to: RA (J2000): 02h 59m 22.04s Dec (J2000): +13d 46' 05.0" with an uncertainty of 2.8 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 13559 table
GRB_name GRB120802A
GCN_number 13559
Detection_method Swift-BAT Det
ra 44.8330°
decl 13.7620°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13559 SUBJECT: GRB 120802A: Swift-BAT refined analysis DATE: 12/08/02 12:29:32 GMT FROM: Scott Barthelmy at NASA/GSFC M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), S. T. Holland (STScI), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120802A (trigger #529486) (Holland, et al., GCN Circ. 13555). The BAT ground-calculated position is RA, Dec = 44.833, 13.762 deg, which is RA(J2000) = 02h 59m 20.0s Dec(J2000) = +13d 45' 43.1" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 56%. The mask-weighted light curve shows a small precursor peak from ~T-40 to ~T-33 sec, then a fast rise at ~T-2 sec, peaking at ~T+2 sec and decaying exponentially with a second peak peaking at ~T+8 sec and ending at ~T+45 sec. T90 (15-350 keV) is 50 +- 31 sec (estimated error including systematics). The time-averaged spectrum from T-35.68 to T+28.02 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.21 +- 0.47, and Epeak of 57.2 +- 19.4 keV (chi squared 52.25 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.9 +- 0.3 x 10^-6 erg/cm2 and the 1-sec peak flux measured from T+7.94 sec in the 15-150 keV band is 3.0 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.84 +- 0.10 (chi squared 58.45 for 57 d.o.f.). 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/529486/BA/
GCN 13561 table
GRB_name GRB120802A
GCN_number 13561
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13561 SUBJECT: GRB 120802A: APEX/LABOCA submm observations DATE: 12/08/02 14:09:06 GMT FROM: Antonio de Ugarte Postigo at IAA-CSIC A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J. Richard (CRAL, U. Lyon), P. Moller (ESO), C. de Breuck (ESO), C. Agurto (ESO) and F. Azagra (ESO) report on behalf of a larger collaboration: We have observed the field of GRB 120802A (Holland et al. GCN 13555) using APEX/LABOCA (Chajnantor, Chile) in the 870um band (345 GHz) under poor weather conditions (PWV starting at 2.0 mm and going down to 1.4 mm at the end of the observation). Data acquisition started at 08:58 UT (58 min after the burst) and lasted for 3.5hr (2.7hr on source). In a preliminary analysis we do not detect any source at the GRB position, where we have an r.m.s. of 4mJy/beam (3-sigma limit of 12 mJy/beam).
GCN 13562 table
GRB_name GRB120802A
GCN_number 13562
Detection_method Other
redshift 3.7960
Circular_text TITLE: GCN CIRCULAR NUMBER: 13562 SUBJECT: GRB 120802A Gemini-N redshift DATE: 12/08/02 19:52:48 GMT FROM: Nial Tanvir at U.Leicester N. R. Tanvir (U. Leicester), D. Fox (Penn State), J. Fynbo (DARK) and C. Trujllo (Gemini) report on behalf of a larger collaboration: We observed the afterglow of GRB 120802A (Holland et al. GCN 13555) using the GMOS-N spectrograph on Gemini-North, covering a spectral range of about 5900A to 10000A. Observations began at 2012-8-2 13:30 UT, about 5:30 hr post-burst. The spectrum reveals many absorption lines including S II (1250), Si II (1260/1304/1526/1808), O I (1304), C II (1334), Si IV (1394/1403), C IV (1548/1551), Fe II (1608), Al II (1670) at a common redshift of z=3.796, which we believe is most likely the redshift of this burst. We no clear evidence of any fine-structure lines. Note, this redshift is consistent with the absence of a strong Lyman-alpha line or Lyman-alpha forest since they would just fall off the blue end of our spectrum. We also detect an intervening system at z=2.38, based on Fe II and Mg II features.
GCN 13563 table
GRB_name GRB120802A
GCN_number 13563
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13563 SUBJECT: GRB 120802A: Swift-XRT refined Analysis DATE: 12/08/02 20:14:04 GMT FROM: Phil Evans at U of Leicester J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU) and S.T. Holland report on behalf of the Swift-XRT team: We have analysed 7.0 ks of XRT data for GRB 120802A (Holland et al. GCN Circ. 13555), from 88 s to 17.6 ks after the BAT trigger. The data comprise 22 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 13558). The light curve can be modelled with an initial power-law decay with an index of alpha=2.7 (+/-0.4), followed by a break at T+270 s to an alpha of 0.35 (+/-0.05). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.10 (+0.21, -0.20). The best-fitting absorption column is 1.5 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 9.6 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 3.6 x 10^-11 (5.1 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.5 (+/-0.5) x 10^21 cm^-2 Galactic foreground: 9.6 x 10^20 cm^-2 Excess significance: 1.8 sigma Photon index: 2.10 (+0.21, -0.20) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00529486. This circular is an official product of the Swift-XRT team.
GCN 13564 table
GRB_name GRB120802A
GCN_number 13564
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13564 SUBJECT: GRB 120802A: GRT Optical Observation DATE: 12/08/02 22:24:03 GMT FROM: Takanori Sakamoto at NASA/GSFC T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC), T. Okajima (GSFC), Y. Urata (NCU) We observed the field of GRB 120802A detected by Swift (trigger #529486; Holland et al., GCN Circ. 13555) with the 14-inch Goddard Robotic Telescope (GRT) located at the Goddard Geophysical and Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/). 30 images of 60 sec exposures were taken in the R filter starting from August 2 08:37:05 (UT) about 36 minues after the trigger and stopped on August 2 09:08:49 (UT). We do not detect the optical afterglow both in the individual images and the stacked image, which only combined 27 good quality images, inside the enhanced XRT position (Evans et al., GCN #13558). The estimated five sigma upper limit of the combined image (total exposure of 1620 sec) is ~17.2 mag using the USNO-B1 catalog.
GCN 13578 table
GRB_name GRB120802A
GCN_number 13578
Detection_method VLA Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 13578 SUBJECT: GRB 120802A: EVLA Observations DATE: 12/08/04 06:59:47 GMT FROM: Tanmoy Laskar at Harvard U T. Laskar, A. Zauderer and E. Berger (Harvard) report: "We observed the position of GRB 120802A (Holland et al. GCN 13555) with the EVLA beginning on 2012 Aug 03.65 UT (1.32 days after the burst). No significant radio emission is detected at the enhanced Swift-XRT position (Evans et al. GCN 13558) to three-sigma upper limits of 39 uJy and 60 uJy, at 6 GHz and 22 GHz, respectively."
GCN 13593 table
GRB_name GRB120802A
GCN_number 13593
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13593 SUBJECT: GRB 120802A: Swift/UVOT Upper Limits DATE: 12/08/06 12:36:40 GMT FROM: Stephen Holland at STScI S. T. Holland (STScI) reports on behalf of the Swift/UVOT team: The Swift/UVOT observed the field of GRB 120802A starting 70 s after the BAT trigger (Holland et al., 2012, GCNC 13555). Settled observations started at 87 s. We do not detect any source inside the UVOT-enhanced XRT error circle (Evans et al., 2012, GCNC 13558). Preliminary magnitudes 3-sigma upper limits at this location for the finding charts (FC) and the co-added images, are Filter TSTART TSTOP Exp Time 3-sigma UL ---------------------------------------------------- white (FC) 87 237 147 >20.8 u (FC) 300 550 246 >19.9 ---------------------------------------------------- v 630 16,594 1317 >20.5 b 555 6625 332 >20.4 u 300 6548 658 >20.5 uvw1 678 17,567 492 >20.4 uvm2 4504 17,499 1279 >21.2 uvw2 4095 11,737 1279 >21.4 white 87 10,731 1268 >22.1 ---------------------------------------------------- The quoted magnitudes and upper limits have not been corrected for the Galactic extinction along the line of sight to this burst of E_{B-V} = 0.14 mag (Schlafly et al. 2011, ApJS, 737, 103).
GCN 13609 table
GRB_name GRB120802A
GCN_number 13609
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13609 SUBJECT: GRB 120802A: optical observations DATE: 12/08/07 23:37:03 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (SAI MSU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 120802A (Holland et al., GCN 13555) with 0.45-m telescope ?f ISON-NM observatory starting on Aug. 02 (UT) 08:13:18 (Elenin et al., GCN 13556). We took several unfiltered images of 30 s and 60 s exposures starting on Aug. 02, (UT) 08:13:18. At the edge of the enhanced by UVOT field astrometry XRT error circle (http://www.swift.ac.uk/xrt_positions/529486) we marginally detect a source in coordinates 02:59:22.35 +13:46:07.2 (uncertainty of about 0.3 arsces in both coordinates). A preliminary photometry of co-added frames is based on the USNO-B1.0 (R2) nearby stars is following: T_start, T0+, Exposure, Object, (UT) mid, d (s) 08:13:18 0.06905 6360 21.2+/-0.6 We suggest the source might be an optical afterglow of GRB 120802A, however at that time we cannot confirm the fading origin of the source.
GCN 13712 table
GRB_name GRB120802A
GCN_number 13712
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13712 SUBJECT: GRB 120802A: optical observations in CrAO DATE: 12/09/04 13:10:16 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (SAI MSU/IKI), L. Elenin (KIAM), V. Rumyantsev (CrAO), A.Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 120802A (Holland et al., GCN 13555) with Shajn telescope of CrAO starting on Aug. 15 (UT) 23:00:26. We took several images in R-filter under mean seeing of 2.8". In a stacked image we do not detect the object suggested as optical counterpart of GRB 120802A (Elenin et al., GCN 13609) up to 22.5 m. Thus we can confirm the object reported in (Elenin et al., GCN 13609) is most probably is an afterglow of GRB 120802A. A photometry of the filed is based on nearby USNO-B1.0 (R2) stars: T0+, Filter Exposure, OT, UL (3 sigma) mid, d (s) 13.625 R 3540 n/d 22.5 We are grateful for CCD PL4240 provided by ISON for Shajn telescope.