{
  "bibcode": "2022GCN.31965....1R",
  "body": "J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), M. Ohno (Hiroshima \nU.),�� N. Werner�� (Masaryk U.),�� L. Meszaros (Konkoly Observatory), H. \nTakahashi (Hiroshima U.), B. Csak (Konkoly Observatory), M. Topinka, F. \nMunz, F. Hroch (Masaryk U.), J. Hudec, J. Kapus, M. Frajt, M. Rezenov \n(Spacemanic s.r.o), R. Laszlo (Needronix), G. Galgoczi (Wigner Research \nCenter/Eotvos U.), N. Uchida (ISAS/JAXA), T. Enoto (Kyoto U.), Zs. Frei \n(Eotvos U.), Y. Fukazawa, K. Hirose, H. Matake (Hiroshima U.), S. \nHisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), L. L. Kiss (Konkoly \nObservatory),�� T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. \nOdaka (Univ of Tokyo), K. Torigoe (Hiroshima U.), P. Svoboda, V. Daniel, \nJ. Dudas, M. Junas, J. Gromes (VZLU), I. Vertat (FEL ZCU)�� -- the \nVZLUSAT-2/GRB payload collaboration.\n\nA long-duration GRB 220423A (AGILE/MCAL detection: Ursi et al., GCN \nCirc. 31938, Happy Birthday to AGILE!; Swift/BAT detection: Raman et \nal., GCN Circ. 31943; CALET/CGMB detection: trig. #1334758343; \nINTEGRAL/SPI-ACS detection: trig. #9870; KONUS-Wind detection: trig. \ntime 2022-04-23 14:14:07.818 UT) was detected by both GRB detector units \non board of the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/).\n\nThe data acquisition was performed by GRB detector units no. 0 and no. \n1. The 28 sigma detection significance was confirmed at each detector at \n2022-04-23 14:14:14 UTC. The GRB has the T90 duration of 37 s.\n\nThe light curve obtained by VZLUSAT-2 is available here:\nhttps://vzlusat2.konkoly.hu/static/share/GRB220423A_GCN_VZLUSAT2.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": 31965,
  "createdOn": 1651163772000,
  "email": "ripa.jakub@mail.muni.cz",
  "subject": "GRB 220423A: Detection by VZLUSAT-2",
  "submitter": "Jakub Ripa at Masaryk University  <ripa.jakub@mail.muni.cz>",
  "eventId": "GRB 220423A"
}