{
  "bibcode": "2009GCN..8858....1G",
  "body": "S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P.\nOleynik, M. Ulanov and T. Cline, on behalf of the Konus-Wind team,\nreport:\n\nSince the renewal of bursting activity of the AXP/SGR 1E1547.0-5408\non January 22 (Gronwall et al., GCN 8833; Connaughton & Briggs, GCN \n8835; von Kienlin & V. Connaughton, GCN 8838; Savchenko et al. GCN 8837;\nTerada et al., GCN 8845; Bellm et al., GCN 8857) Konus-Wind have seen 11 \ntriggers from this source.\n\nThe first trigger at 2009-01-22 T0=3554.882 s UT (00:59:14.882) contains \nmany bursts and represent the cluster of bursts which started at \n~T0-210s. The second trigger also contains several bursts. Remaining \ntriggers contain single bright bursts.\n\nThere is a data gap from 02:13 to 15:43 UT on Jan 22, 2009 which cannot \nbe recovered.\n\nThe following is a list of the Konus-Wind triggers with preliminary \nestimations of the bursts fluences and peak fluxes. The KW trigger times \nand corresponding Earth-crossing times are given.\n-------------------------------------------------------------------\n\n#   Date     T0(KW)       T0Earth   Localized   Fl**  PF**\n               UT           UT          by\n-------------------------------------------------------------------\n1* 20090122 00:59:14.882 00:59:18.550 GBM      8.0 8.0\n2* 20090122 02:09:22.183 02:09:25.849 BAT      5.7 1.3\n3  20090122 17:02:52.833 17:02:56.474 BAT      2.7 2.5\n4  20090122 21:07:56.190 21:07:59.824  -       1.0 3.4\n5  20090122 23:14:50.460 23:14:54.090 GBM      4.7 7.8\n6  20090123 01:19:37.838 01:19:41.465 BAT,GBM  2.7 7.5\n7  20090123 02:42:05.150 02:42:08.774 GBM      3.2 9.7\n8  20090123 16:54:33.488 16:54:37.087 GBM      1.3 5.6\n9  20090125 08:43:37.781 08:43:41.303 IBIS    250  300\n10 20090125 23:00:32.802 23:00:36.294 IPN,GBM  7.6 19\n11 20090126 04:48:01.917 04:48:05.397 GBM      1.6 5.7\n------------------------------------------------------------------\n* - these triggers contain several bursts, in Table we give total\n     fluence of all bursts and peak flux of the brightest burst\n\n** - Fluence (20-200 keV) in units of 1e-6 erg/cm2\n\n*** - Peak Flux (20-200 keV) on 4ms time scale\n       in units of 1e-5 erg/cm2/s\n\nSome Abbreviations:\nBAT: Swift BAT\nGBM: Fermi GBM\nIBIS: Imager on Board the INTEGRAL Satellite\nIPN: Interplanetary Network\n\n\nThe spectra of the most bursts are well fitted (in the 20-500 keV energy \nrange) by power low with exponential cutoff model with Epeak values in \nthe 25-35 keV range. Some bursts demonstrate strong spectral evolution.\nSome spectra can be well fitted by simple power law model.\n\nThe burst #3 while having moderate fluence has a peculiar spectrum. It \nis well fitted by grbm model with alpha ~-1, Ep ~40, and beta ~-3.2 \n(cutoffpl model provides much worse chi2), the emission is seen up to \n500 keV.\n\nThe burst #9 (Golenetskii et al., GCN 8851) is the brightest burst \ndetected by Konus-Wind from this AXP/SGR. It has the hardest spectrum \nwith Epeak ~70 keV. Its duration (~400ms), energy output ~2.4x10^42 erg \n(for d=9 kpc), and peak luminosity ~2.9x10^43 erg/s are close to the \ncharacteristics of the famous event 980618a from SGR 1627-41 (dT~0.5 s, \nQ = 3x10^42 erg, L = 8x10^43 erg/s for d=5.8 kpc: see Mazets et al., \nApJ, 519, L151 (1999)). There is no any sign of pulsating tail in both \ncases.\n\nThe second burst in brightness (#10) has the second in hardness spectrum \nwith Ep ~45 keV.\n\nNumerous short soft bursts most likely originated from this source were \ndetected by Konus-Wind in the waiting mode.\n\nWe thank Sandro Mereghetti for poiting our attention to the IBIS/ISGRI \nlocalization of the very bright SGR burst 090125 (T0=31417.781 s UT \n08:43:37.781).\n\nWe thank David Palmer for providing us with the information about BAT \nobservations of the KW bursts.\n\nWe also thank all IPN teams which provided us with the information about \nobservations of the KW bursts by their instruments.\n\n[GCN OPS NOTE(28jan09): Per author's request, the \"152\" was replaced with \"L151\".]",
  "circularId": 8858,
  "createdOn": 1233150634000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>"
}