{
  "subject": "GRB 260602B: cubesat Avion detection",
  "circularId": 45211,
  "eventId": "GRB 260602B",
  "body": "From Andrey Bogomolov at Moscow State University <aabboogg@srd.sinp.msu.ru>\n\nA. Bogomolov, V. Bogomolov, A. Iyudin, S. Svertilov, N. Vasiliev\non behalf of the MSU “Sozvezdie-270” team, report:\n\nAt 2026-06-02 ~22:41:31 UT the short GRB 260602B (Fermi GBM detection: GCN #44779) was detected by the DeCoR-1 instrument on the cubesat Avion of the Moscow University project “Sozvezdie-270” [1].\n\nTotal amount of photons detected by Avion is 24 (energy band >40 keV), it corresponds to a fluence of ~1.1*10^(-7) erg/cm^2 in the range 40-500 keV.\n\nLC in the energy range of 40-500 keV is a single episode of ~0.5 sec duration with a maximum flux of ~2.3 phot/(cm^2*s).\n\nА total duration (T90) of the burst is ~0.5 s.\n\nThe light curve obtained by Avion is available here:\nhttps://swx.sinp.msu.ru/models/grb_cat/data/pictures/GRB260602B_LC_Avion.png\n\nParameters of GRB 260602B as well as other GRBs detected by Moscow University cubesats are listed at: https://swx.sinp.msu.ru/models/grb_cat/grb.php?lang=en\n\nAvion is one of 5 cubesats of the Moscow University project “Sozvezdie-270” [1] launched on 2023 June 27. The payload of Avion is a set of scintillation gamma-ray detectors DeCoR [2], the energy range is  >30 keV, the time resolution is 0.5s.\n\n[1] Svertilov et al. 2023  https://link.springer.com/chapter/10.1007/978-3-031-50248-4_21\n[2] Bogomolov et al. 2022 Universe 8, 282 https://www.mdpi.com/2218-1997/8/5/282\n",
  "bibcode": "2026GCN.45211....1B",
  "createdOn": 1784984155566,
  "submitter": "Andrey Bogomolov at Moscow State University <aabboogg@srd.sinp.msu.ru>",
  "submittedHow": "email"
}