TITLE: GCN CIRCULAR NUMBER: 38161 SUBJECT: GRB 241018A: cubesat Avion detection DATE: 24/11/11 09:51:18 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru
A. Bogomolov, V. Bogomolov, A. Iyudin, S. Svertilov, N. Vasil’ev on behalf of the MSU “Sozvezdie-270” team, report:
At 2024-10-18 11:54:37 UT the long-duration GRB 241018A (SVOM detection: GCN #37812; Konus-Wind detection: GCN #37832) was detected by the cubesat Avion of the Moscow University project “Constellation-270” [1].
Total amount of photons detected by Avion in the energy band 40-500 keV is 234, it corresponds to a fluence of 1*10^(-6) erg/cm^2.
The LC in the energy band 40-500 keV has two main peaks with maximal flux 7.4phot/(cm^2*s) in the 1st peak and 8.4 phot/(cm^2*s) in the 2nd peak.
Total duration (T90) of the burst is 7 s. The light curve obtained by Avion is available here: https://swx.sinp.msu.ru/models/grb_cat/data/pictures/GRB_241018A_Avion_DeCoR...
Parameters of GRB 241018A as well as 20 other GRBs detected by Moscow University cubesats are listed at: https://swx.sinp.msu.ru/models/grb_cat/grb.php?lang=en
Avion is one of 5 cubesats of the Lomonosov MSU project “Constellation-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.
[1] Svertilov et al. 2023 https://link.springer.com/chapter/10.1007/978-3-031-50248-4_21 [2] Bogomolov et al. 2022 Universe 8, 282 https://www.mdpi.com/2218-1997/8/5/282
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