{
  "bibcode": "2022GCN.31803....1R",
  "body": "J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), M. Ohno (Eotvos \nU./Hiroshima U.),�� N. Werner�� (Masaryk U.),�� L. Meszaros (Konkoly \nObservatory), H. Takahashi (Hiroshima U.), B. Csak (Konkoly \nObservatory), M. Topinka, F. Munz, F. Hroch (Masaryk U.), J. Hudec, J. \nKapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo (Needronix), \nG. Galgoczi (Wigner Research Center/Eotvos U.), N. Uchida (ISAS/JAXA), \nT. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), Y. Fukazawa, K. Hirose, H. \nMatake (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), \nL. L. Kiss (Konkoly Observatory),�� T. Mizuno (Hiroshima U.), K. Nakazawa \n(Nagoya U.), H. Odaka (Univ of Tokyo), K. Torigoe (Hiroshima U.), P. \nSvoboda, V. Daniel, J. Dudas, M. Junas, J. Gromes (VZLU), I. Vertat (FEL \nZCU)�� -- the VZLUSAT-2/GRB payload collaboration.\n\nThe bright, long-duration GRB 220320A (AstroSat-CZTI detection: \nGopalakrishnan et al., GCN Circ. 31779; localized by IPN: Kozyrev et al. \nGCN Circ. 31783 and detected also by Fermi/GBM trigger 669443999, \nCALET/CGBM trigger 1331786356, Konus-Wind, INTEGRAL/SPI-ACS at about \n04:39:54 UT) was also detected by one of the two GRB detectors on board \nof the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/).\n\nThis is the first time that a GRB was observed by the VZLUSAT-2 3U CubeSat.\n\nThe data acquisition was performed by GRB detector unit no. 1 (the unit \nno. 0 was turned off). The detector was performing a several hours long \nbackground monitoring survey with 15 s temporal resolution, which is not \noptimal for GRB search. Much finer resolution is planned for the nominal \noperation. The 46 sigma detection significance was confirmed at around \n04:39:55 UTC.\n\nThe light curve obtained by VZLUSAT-2 is available here:\nhttps://vzlusat2.konkoly.hu/static/share/GRB220320A_GCN_VZLUSAT_2.pdf\n\nGRB detectors on VZLUSAT-2 are a demonstration payload for a future \nCubeSats constellation (Werner et al. Proc. SPIE 2018). Two GRB modules \nof VZLUSAT-2 are placed in a perpendicular manner and each consists of a \n75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the \nenergy range from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022 \nJanuary 13 from Cape Canaveral.",
  "circularId": 31803,
  "createdOn": 1648526766000,
  "email": "ripa.jakub@mail.muni.cz",
  "subject": "GRB 220320A: Detection by VZLUSAT-2",
  "submitter": "Jakub Ripa at Masaryk University  <ripa.jakub@mail.muni.cz>",
  "eventId": "GRB 220320A"
}