{
  "bibcode": "2023GCN.33473....1D",
  "body": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory),  N.\nWerner  (Masaryk U.), M. Ohno (Hiroshima U.),  L. Meszaros, B. Csak\n(Konkoly Observatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka,\nF. Hroch, N. Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec, J. Kapus, M.\nFrajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo (Needronix), G. Galgoczi\n(Wigner Research Center/Eotvos U.), N. Uchida (ISAS/JAXA), T. Enoto (Kyoto\nU.), Zs. Frei (Eotvos U.), Y. Fukazawa, K. Hirose, H. Matake (Hiroshima\nU.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), L. L. Kiss (Konkoly\nObservatory),  T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka\n(Univ of Tokyo), K. Torigoe (Hiroshima U.), P. Svoboda, V. Daniel, J.\nDudas, M. Junas, J. Gromes (VZLU), I. Vertat (FEL ZCU)  -- the\nVZLUSAT-2/GRB payload collaboration.\n\n\nThe GRB detector on board the VZLUSAT-2 3U CubeSat (\nhttps://www.vzlusat2.cz/en/) detected an outburst from the SGR 1806-20\n(Swift/BAT detection: GCN 33451; Konus/Wind detection at  2023-03-10\n21:00:32.718 UT; INTEGRAL/SPI-ACS detection at 2023-03-10 21:00:35 UT).\n\nThe data acquisition was performed by GRB detector units no. 0 and no. 1.\nThe detection was confirmed at the peak time 2023-03-10 21:00:34 UTC. The\ntemporal resolution of the observation was 1 s and both light curves show a\nspike within one bin in the 40-110 keV band. The detection significance\nreached 8.6 sigma (19.4 sigma) for detector unit no. 0 (no. 1).\n\nThe light curve obtained by VZLUSAT-2 is available here:\n\nhttps://vzlusat2.konkoly.hu/static/share/SGR1806-20_GCN_VZLUSAT2.pdf\n\nAll VZLUSAT-2 detections are listed at:\nhttps://monoceros.physics.muni.cz/hea/VZLUSAT-2/\n\nThe GRB detectors on VZLUSAT-2 are a demonstration payload for a future\nCubeSat constellation (Werner et al. Proc. SPIE 2018). Two GRB modules of\nVZLUSAT-2 are placed in a perpendicular manner and each consists of a 75 x\n75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy\nrange from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022 January 13\nfrom Cape Canaveral.",
  "circularId": 33473,
  "createdOn": 1678742900000,
  "email": "500025@mail.muni.cz",
  "subject": "VZLUSAT-2 detection of SGR 1806-20",
  "submitter": "Marianna Dafcikova at Masaryk University  <500025@mail.muni.cz>"
}