//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13376 SUBJECT: IPN Triangulation of GRB 120624A (short/intense) DATE: 12/06/24 23:00:23 GMT FROM: Dmitry Svinkin at Ioffe Institute S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, K. Hurley, and J. Goldsten, on behalf of the MESSENGER GRNS GRB team, V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, report: The bright, short-duration GRB 120624A has been observed by Fermi (GBM trigger 362215467), INTEGRAL (SPI-ACS), Konus-Wind, Swift (BAT), and MESSENGER (GRNS), so far, at about 26665 s UT (07:24:25). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 4.773 (00h 19m 05s) +7.167 ( +7d 10' 00") Corners: 5.349 (00h 21m 24s) +5.841 ( +5d 50' 28") 5.463 (00h 21m 51s) +5.941 ( +5d 56' 27") 4.182 (00h 16m 44s) +8.484 ( +8d 29' 02") 4.068 (00h 16m 16s) +8.384 ( +8d 23' 01") --------------------------------------------- The error box area is 0.42 sq. deg, and its maximum dimension is 2.9 deg (the minimum one is 0.2 deg). This box may be improved. The time history and spectrum will be given in a forthcoming GCN Circular. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13378 SUBJECT: Konus-Wind observation of GRB 120624A DATE: 12/06/25 09:50:57 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The short-duration hard intense GRB 120624A (IPN localization: Golenetskii at al., GCN 13376) triggered Konus-Wind at T0=26662.982s UT (07:24:22.982) The light curve shows a single pulse, a total duration of the burst is ~0.3 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120624_T26662/ As observed by Konus-Wind the burst had a fluence of 3.3(-0.3,+0.3)x10-5 erg/cm2, and a 16-ms peak flux, measured from T0+0.048 s, of 2.0(-0.3,+0.3)x10-4 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The spectrum of the burst (measured from T0 to T0+0.256 s) is well fit in the 20 keV - 10 MeV range by a power law with exponential cutoff model, for which alpha = -0.70 (-0.1, +0.1), and Ep = 3350(-460, +550) keV, chi2 = 49.4/50 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13380 SUBJECT: GRB 120624A: Fermi GBM observation DATE: 12/06/25 14:24:49 GMT FROM: Andreas von Kienlin at MPE A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: "At 07:24:25.34 UT on 24 June 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120624A (trigger 362215467 / 120624309). The burst was also detected by the 3rd Interplanetary Network (Golenetskii et al. 2011, GCN 13376). The angle from the Fermi LAT boresight is 90.2 degrees. The GBM light curve consists of a single FRED-like pulse with a duration (T90) of about 0.7 s (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.448 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.83 (+0.02/-0.02) and the cutoff energy, parameterized as Epeak, is 3800 (+200/-180) keV. The event fluence (10-1000 keV) in this time interval is (6.5 +/- 0.1)E-06 erg/cm^2. The 0.064-sec peak photon flux measured starting from T0+0.064 s in the 10-1000 keV band is 78.245 +/- 2.4 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak = 3700 (+200/-220) keV, alpha = -0.83 (+0.02/-0.02) and beta = -3.4 (+0.4/-0.8). The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."