{
  "bibcode": "2009GCN..8837....1S",
  "body": "V. Savchenko, V. Beckmann, A. Neronov (ISDC), S.\nMereghetti  (INAF/IASF-Milano), A. von Kienlin (MPE), M. Beck (ISDC), J.\nBorkowski (CAMK/Torun), D. Gotz  (CEA/Saclay) report on behalf of the\nINTEGRAL SPI-ACS GRB team:\n\nThe SPI Anti-Coincidence System (ACS) on-board INTEGRAL has detected\nburst activity most likely arising from the AXP 1E1547.0-5408, as\nreported based on Swift/BAT (GCN 8834, 8833) and Fermi GBM data (GCN\n8835).\n\n From 2009-01-22T00:42:05 until 10:49:56 UT, 167 short (from 50ms to\n  8s) intense bursts were detected with significance from 5 to 160 sigma\n(1e4 - 2e6 counts/s peak count rate).\n\nThe SPI-ACS light curves of triggered events are available (both as\nimages and data files)\nat http://isdc.unige.ch/Soft/ibas/ibas_acs_web.cgi\n\nThe light curves, binned at 50 ms, are derived from 91 independent\ndetectors with different lower energy thresholds (mainly between 50 keV\nand 150 keV) and an upper threshold at about 100 MeV. The ACS response\nvaries as a function of the GRB incident angle. For these reasons we\ncaution that the count rates cannot be easily translated into physical\nflux units.",
  "circularId": 8837,
  "createdOn": 1232641352000,
  "email": "volodymyr.savchenko@unige.ch",
  "subject": "AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase",
  "submitter": "Volodymyr Savchenko at ISDC,U of Geneve  <volodymyr.savchenko@unige.ch>"
}