{
  "bibcode": "2009GCN..8928....1G",
  "body": "S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, V. \nIl'inskii, P. Oleynik, M. Ulanov, D. Svinkin, on behalf of the Konus-RF \nand Konus-Wind teams, report:\n\nAt 07:25:57 UT on February 27, 2009 the KONUS-RF gamma-ray spectrometer \ndetected its first gamma-ray burst, GRB 090227A (Fermi/GBM trigger \n257412359 / 090227310: Bissaldi GCN 8917).\nThat day at 13:43:36 UT the instrument detected a bright short soft \nburst from the AXP/SGR 1E1547.0-5408.\nBoth bursts also triggered Konus-Wind.\n\nThe Konus-RF gamma-ray spectrometer is an instrument of the \nCORONAS-PHOTON solar space observatory that was launched on January 30, \n2009 into a low-Earth low-eccentricity, high-inclination orbit (altitude \n547-592 km, inclination 82.5 deg). CORONAS-PHOTON is a 3-axis \nstabilized, Sun-pointing spacecraft. Konus-RF has been successfully \noperating since February 19.\n\nThe Konus-RF experiment is aimed at studying of temporal and spectral \ncharacteristics of solar flares, gamma-ray bursts, and SGR bursts in a \nwide energy range from 10 keV to 10 MeV. It consists of two identical \nomnidirectional detectors one of which points toward the Sun thereby \nobserving the solar hemisphere, and the other observes the antisolar \nhemisphere. Thus, the instrument provides continuous monitoring of the \nunocculted sky. However, the usable exposure time is severely limited by \npassage through the radiation belts at high latitudes and the South \nAtlantic Anomaly. Each detector employs NaI(Tl) crystal, 127 mm in \ndiameter and 76.2 mm in height, supplied with a beryllium entrance \nwindow. The Konus-RF instrument is an advanced modification of the \nRussian-American Konus-Wind spectrometer. More details can be found at \nhttp://www.astro.mephi.ru/coronos-photon_conusrf_e.htm\n\nThe Konus-RF and Konus-Wind light curves of the SGR burst 090227 are \navailable at http://www.ioffe.ru/LEA/SGRs/090227_T49414/",
  "circularId": 8928,
  "createdOn": 1236178906000,
  "email": "val@mail.ioffe.ru",
  "subject": "Konus-RF catches first GRB and SGR bursts",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>"
}