{
  "submittedHow": "web",
  "createdOn": 1781880689423,
  "subject": "GRB 260604B: 239Alferov CubeSat detection",
  "circularId": 45006,
  "eventId": "GRB 260604B",
  "format": "text/plain",
  "body": "GRB 260604B: 239Alferov CubeSat detection\n\nD. Svinkin (Ioffe), D. Frederiks (Ioffe), D. Kapshtan (Geoscan), M. Orlov (Geoscan), \nV. Bazunova (Geoscan), E. Shchepin (Geoscan), E. Meltsov (Geoscan), \nK. Starikov (Geoscan, SPbSU), A. Khogoev (Geoscan), \nA. Razdobarin (SPbAU), and D. Dolmatov (SPbSU),\non behalf of the 239Alferov team, report:\n\nThe long-duration GRB 260604B\n(Fermi-GBM detection: The Fermi GBM team, GCN 44818; \nSVOM-GRM detection: Zhang et al., GCN 44850)\nwas detected by 239Alferov 3U CubeSat at about 31555 s (08:45:55) UT.\nThe burst was also detected by Konus-Wind in the waiting mode.\n\nThe burst light curve, as measured by 239Alferov detector, \nshows a multi-peaked structure with a duration of ~8 s. \nThe emission is seen up to ~500 keV.\n\nThe light curve recorded by 239Alferov is available at:\nhttp://www.ioffe.ru/LEA/239Alferov/260604B/\n\n239Alferov GRB detections are listed at:\nhttp://www.ioffe.ru/LEA/239Alferov/\n\n239Alferov is an educational 3U CubeSat mission at SSO combining amateur radio \nand space research objectives. The gamma-ray detector onboard 239Alferov contains \na 64x72x15 mm NaI(Tl) scintillator read out by a SiPM array and covers the energy range \nfrom ~20 keV to ~1000 keV. \nCurrently, the instrument records count rates in five energy bands:  \n~20-50 keV, ~50-100 keV, ~100-500 keV, 500-1000 keV, and > 1000 keV, with 0.5 s temporal resolution.\nThe ground segment of the mission utilizes the SONIKS open ground station network.",
  "submitter": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>"
}