{
  "bibcode": "2007GCN..6408....1G",
  "body": "S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,\nand T. Cline on behalf of the Konus-Wind team,\n\nK. Hurley and T. Cline, on behalf of the Mars Odyssey GRB team,\n\nI. Mitrofanov, A. Kozyrev, M. Litvak, A. Sanin, V. Tret'yakov and A.\nParshukov, on behalf of the HEND-Odyssey GRB team,\n\nW. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on\nbehalf of the GRS-Odyssey GRB team,\n\nJ. Cummings, S. Barthelmy, N. Gehrels, and H. Krimm, on behalf of\nthe Swift-BAT team,\n\nA bright GRB triggered Konus-Wind at 2007-05-12 T0=21972.572 s UT \n(06:06:12.572). It was also observed by Mars Odyssey (HEND and GRS), and \nSwift-BAT. The burst was outside of the field of view of Swift-BAT, so \nit was not imaged.\n\nThe burst light curve shows a single smooth pulse with a duration\nof ~2 sec, followed by a weak tail seen up to T-T0 ~10 sec.\nThere is substantial time lag between light curve in different \nKonus-Wind bands.\n\nIt was triangulated to the MO-Wind annulus centered at\nRA=357.861 (23h 51m 27s) Dec=-2.565 (-2d 33' 55\"),\nwhose radius is 87.897 +/- 0.035  deg (3 sigma).\nThe Wind-Swift annulus constrains the arrival direction\nto the long 3-sigma error box (portion of the annulus) with corners:\n\n  ---------------------------------------------------\n    RA, deg                 Dec, deg     (J2000)\n  ---------------------------------------------------\n   269.113 (17h 56m 27s)   -20.440 (-20d 26' 25\")\n   269.181 (17h 56m 43s)   -20.642 (-20d 38' 31\")\n   268.735 (17h 54m 56s)   -30.959 (-30d 57' 32\")\n   268.823 (17h 55m 18s)   -30.761 (-30d 45' 41\")\n  ---------------------------------------------------\n\nThe area of the box is 0.361 sq. deg.\n\nWe note that this error box is consistent with the direction of\nthe Galactic bulge.  We are waiting for MESSENGER data to reduce\nthe size of the error box.\n\nPreliminary analysis of the Konus-Wind data yields a burst fluence of\n2.86(-0.12, +0.10)x10^-5 erg/cm2 (in the 20 keV - 1 MeV range).\nThe time-integrated spectrum of the burst (from T0 to T0+9.472 s)\ncan be fitted (in the 20 keV - 1 MeV range)\nby GRBM (Band) model for which:\nthe low-energy photon index is alpha = -0.68(-0.18, +0.19),\nthe high energy photon index beta = -2.65 (-0.46, +0.20),\nthe peak energy Ep = 191(-18, +23) keV (chi2 = 68/59 dof).\n\nSo the burst cannot definitely be placed in either the short\nor long GRB class.\n\nAll the quoted errors are at the 90% confidence level.\n\nThe Konus-Wind light curve of this GRB is available\nat http://www.ioffe.rssi.ru/LEA/GRBs/GRB070512_T21972/",
  "circularId": 6408,
  "createdOn": 1179169267000,
  "email": "val@mail.ioffe.ru",
  "subject": "GRB 070512: IPN localization and Konus spectrum of a bright burst",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 070512"
}