//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13422 SUBJECT: GRB 120707A: Fermi GBM Detection of a Bright Burst DATE: 12/07/08 05:55:26 GMT FROM: George A. Younes at USRA/NASA/MSFC George Younes (NASA/USRA), report on behalf of the Fermi GBM Team: "At 19:12:17.42 UT on 07 July 2012, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 120707A (trigger 363381140 / 120707.800). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 291.06, Dec = -34.44 (J2000 degrees, equivalent to J2000 19h 24m, -34d 26'), with a statistical uncertainty of 1.0 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Fermi LAT boresight is 159 degrees. The burst triggered an ARR (Automatic Repointing Request), causing Fermi to slew so the LAT would point to the source. Because the burst was close to the Earth's limb, this maneuver was delayed, placing the GRB position near the LAT boresight starting about 1000 s after the GBM trigger time. The GBM light curve shows a strong central pulse with fainter wings with a duration (T90) of about 50 s (50-300 keV). The time-averaged spectrum from T0-3 to T0+57 s is best fit by a Band function with Epeak = 174 +/- 7 keV, alpha = -1.17 +/- 0.03, and beta = -2.31 +/- 0.03. The fluence (10-1000 keV) in this time interval is (1.1 +/- 0.007)E-4 erg/cm^2. The 1-sec peak photon flux measured starting from T0+29.1 s in the 10-1000 keV band is 62 +/- 2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog." //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13424 SUBJECT: IPN Triangulation of GRB 120707A DATE: 12/07/10 17:52:25 GMT FROM: Valentin Pal'shin at Ioffe Inst K. Hurley on behalf of the Mars Odyssey and MESSENGER GRB teams, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey 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, S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, and K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima on behalf of the Suzaku WAM team, report: The long-duration, intense GRB 120707A (Younes, GCN 13422) has been observed by Fermi (GBM: trigger 363381140), Konus-Wind, INTEGRAL (SPI-ACS), Swift (BAT), Mars Odyssey (HEND), and Suzaku (WAM), so far, at about 69140 s UT (19:12:20). 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: 291.874 (19h 27m 30s) -32.770 (-32d 46' 12") Corners: 293.104 (19h 32m 25s) -36.566 (-36d 33' 56") 292.808 (19h 31m 14s) -37.093 (-37d 05' 36") 290.585 (19h 22m 20s) -27.663 (-27d 39' 48") 290.769 (19h 23m 05s) -26.473 (-26d 28' 23") --------------------------------------------- The error box area is 3.50 sq. deg, and its maximum dimension is 10.8 deg. This box can be improved. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB120707_T69146/IPN/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13425 SUBJECT: Konus-Wind observation of GRB 120707A DATE: 12/07/10 18:02:26 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 long intense GRB 120707A (GBM trigger 363381140: Younes, GCN 13422; IPN localization: Hurley at al., GCN 13424) triggered Konus-Wind at T0=69146.810s UT (19:12:26.810) The light curve shows a strong pulse peaked at ~T0+24 s. A total duration of the burst is ~95 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/GRB120707_T69146/ As observed by Konus-Wind the burst had a fluence of 1.35(-0.15,+0.15)x10-4 erg/cm2, and a 256-ms peak flux, measured from T0+24.064 s, of 1.05(-0.15,+0.15)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+57.600 s) is best fit in the 30 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -1.54 (-0.09, +0.12), the high energy photon index beta = -2.22 (-0.24, +0.14), the peak energy Ep = 190(-37, +41) keV, chi2 = 74.9/82 dof. The spectrum at the maximum count rate (measured from T0+20.224 to T0+26.368 s) is best fit in the 30 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -1.30 (-0.12, +0.16), the high energy photon index beta = -2.3 (-0.38, +0.16), the peak energy Ep = 213(-41, +53) keV, chi2 = 86.4/82 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 13445 SUBJECT: Konus-Wind observation of GRB 120707A DATE: 12/07/11 18:30:58 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 long hard intense GRB 120711A (detected by the INTEGRAL/IBAS Gotz et al., GCN 13434; MAXI/GSC detection: Serino et al., GCN 13436; Fermi/GBM trigger 363667496/120711115: Gruber & Palassa, GCN 13437; Fermi/LAT detection: Tam, Li & Kong, GCN 13444) triggered Konus-Wind at T0=09955.810s UT (02:45:55.810) The light curve starts with a precursor at ~T0-65s followed by a strong hard double pulse lasting from ~T0-3 s to ~T0+50 s. Several short (100 - 200 ms) bright spikes are well detected over the general burst light curve in the ~T0+30 s to ~T0+40 s time interval. A a weak decaying emission tail in the soft energy channel G1(25-90 keV) is detectable till at least ~T0+400s. The emission during the main phase of the event is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120711_T09955/ As observed by Konus-Wind the burst had a fluence of 3.8(-0.2,+0.2)x10-4 erg/cm2, and a 64-ms peak flux, measured from T0+32.576 s, of 3.6(-0.4,+0.4)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+46.336 s) is best fit in the 20 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -0.97 (-0.02, +0.02), the high energy photon index beta = -2.7 (-0.3, +0.2), the peak energy Ep = 1060(-60, +60) keV, chi2 = 95.7/87 dof. The spectrum at the maximum count rate (measured from T0+30.208 to T0+34.560 s) is best fit in the 20 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -0.93 (-0.04, +0.04), the high energy photon index beta = -2.5 (-0.5, +0.3), the peak energy Ep = 1400(-160, +170) keV, chi2 = 85.5/87 dof. Assuming the likely GRB redshift of z=1.405 (Tanvir et al., GCN 13441) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73: the isotropic energy release E_iso is (1.95 ± 0.1)x10^54 erg, the isotropic peak luminosity L_iso_max is (4.5 ± 0.5)x10^53 erg/s, and Ep_rest is (2550 ± 150) keV. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.