{
  "bibcode": "2022GCN.32629....1D",
  "body": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. \nWerner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, \nB. Csak (Konkoly Observatory), N. Husarikova, J.-P. Breuer, F. Munz , M. \nTopinka, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal,�� A. Povalac (Brno \nU. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. \nLaszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky \n(Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos \nU.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida \n(ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto \n(Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. \nHirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), \nK. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory),�� T. Mizuno \n(Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. \nTakatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama \n(Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) \n-- the GRBAlpha collaboration.\n\nThe long-duration GRB 220915A (Fermi-GBM detection trigger 684911625; \nKonus-Wind detection at 2022-09-15 05:13:46.2 UT; INTEGRAL/SPI-ACS \ndetection at 2022-09-15 05:13:43 UT) was detected by the GRBAlpha 1U \nCubeSat (Pal et al. Proc. SPIE 2020).\n\nThe 8.4 sigma detection was confirmed at the peak time 2022-09-15 \n05:13:42.9 UTC. The GRB has the T90 duration of 12 s.\n\nThe light curve obtained by GRBAlpha is available here:\nhttps://grbalpha.konkoly.hu/static/share/GRB220915A_GCN.pdf\n\nGRBAlpha is a demonstration mission for a future CubeSats constellation \n(Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a \n75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the \nenergy range from ~50 keV to ~1000 keV. GRBAlpha was launched on 2021 \nMarch 22 from Baikonur. After its commissioning phase, the scientific \nobservations are now under way. To increase the duty cycle and the \ndownlink rate, the upgrade of the on-board data acquisition software \nstack is in progress. The ground segment is also supported by the radio \namateur community and it takes advantage of the SatNOGS network for \nincreased data downlink volume.",
  "circularId": 32629,
  "createdOn": 1665172615000,
  "email": "245487@mail.muni.cz",
  "subject": "GRB 220915A: Detection by GRBAlpha",
  "submitter": "Jakub Ripa at Masaryk University  <245487@mail.muni.cz>",
  "eventId": "GRB 220915A"
}