//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 15131 SUBJECT: GRB 130829A: Swift detection of a burst DATE: 13/08/29 18:20:10 GMT FROM: David Palmer at LANL D. Grupe (PSU), D. N. Burrows (PSU), S. T. Holland (STScI), J. A. Kennea (PSU), A. Y. Lien (NASA/GSFC/ORAU), C. J. Mountford (U Leicester), P. T. O'Brien (U Leicester) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 05:43:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130829A (trigger=568417). Swift could not slew to the burst location due to a Sun constraint. Due to this source's apparent proximity to the Galaxy NGC 4144, this was originally reported as a transient and no GCN circular was issued. Using the data set from T-239 to T+303 sec from the recent telemetry downlink, we report the detection of BAT GRB 130829A (trigger #568417). The BAT ground-calculated position is RA, Dec = 182.426, 46.520 deg which is RA(J2000) = 12h 09m 42.1s Dec(J2000) = +46d 31' 10.8" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 84%. The mask-weighted light curve shows a long peak starting from ~T+34 and ending at ~T+77. T90 (15-350 keV) is 42.56 +- 7.08 sec (estimated error including systematics). The time-averaged spectrum from T+30.86 to T+87.50 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.36 +- 0.12. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+50.90 sec in the 15-150 keV band is 0.6 +- 0.1 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/568417/BA/ The nominal (Simbad) coordinates of galaxy NGC 4144 are 2.8 arcmin East and 3.8 arcmin North of the BAT GRB location. This places the entire BAT error circle outside of the bright visible area of the galaxy, but the position would be consistent with an extended spherical halo. Due to an observing constraint, Swift XRT or UVOT cannot observe this region until September 24th, 2013. Burst Advocate for this burst is D. Grupe (dxg35 AT psu.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.) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 15134 SUBJECT: GRB 130829A: NOT optical observations DATE: 13/08/29 22:49:43 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), D. Malesani (DARK/NBI), J. P. U. Fynbo (DARK/NBI), A. A. Djupvik (NOT), Y. Martinez-Osorio (NOT) report on behalf of a larger collaboration: We observed the BAT field of GRB 130829A (Grupe et al., GCN 15131) using the 2.5 Nordic Optical Telescope (NOT) equipped with StanCam. We obtained 4x300s R-band frames at a mean time of 20:46 UT on 2013-08-29, i.e., 15.05 hr after the BAT trigger. Observations were carried out at high airmass, and the resulting seeing was about 1 arcsec. Our images cover 96% of the BAT error circle. Our image reaches a depth comparable to the SDSS, roughly R = 22.7. Visual comparison between our data and the SDSS image reveals no new source within the BAT error circle. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 15136 SUBJECT: GRB 130829A: AAO optical observations DATE: 13/08/30 12:48:18 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V. Ayvazian(AAO), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 130829A (Grupe et al., GCN 15131) with AS-32 (0.7m) telescope of Abastumani Observatory on Aug. 29 starting (UT) 18:56. We obtained several unfiltered images of 120 s exposure. Our images cover 100% of the BAT error circle. In the BAT error localization GRB 130829A (Grupe et al., GCN 15131) we do not identify any new source in comparison with SDSS. A photometry of combined image against nearby SDSS stars (R magnitude, transformed by Lupton gri -> R transformation) is following Date T_start t-t0, exp, OT UL (UT) mid, d s 2013-08-29 18:55:48 0.56442 9x120 n/d 20.6