{
  "subject": "GRB 220829A: Detection by GRBAlpha",
  "eventId": "GRB 220829A",
  "bibcode": "2022GCN.32697....1D",
  "createdOn": 1665520437000,
  "circularId": 32697,
  "submitter": "Jakub Ripa at Masaryk University  <245487@mail.muni.cz>",
  "email": "245487@mail.muni.cz",
  "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), F. Munz, N. Husarikova, J.-P. Breuer, 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 220829A (Konus-Wind detection at 2022-08-29 \n14:37:50.3 UT; INTEGRAL/SPI-ACS detection at 2022-08-29 14:37:52 UT) was \ndetected by the GRBAlpha 1U CubeSat (Pal et al. Proc. SPIE 2020).\n\nThe 14.8 sigma detection was confirmed at the peak time 2022-08-29 \n14:37:50.4 UTC. The GRB has a T90 duration of 6 s.\n\nThe light curve obtained by GRBAlpha is available here:\nhttps://grbalpha.konkoly.hu/static/share/GRB220829A_GCN.pdf\n\nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a \nfuture CubeSat constellation (Werner et al. Proc. SPIE 2018). Its \ndetector consists of a 75 x 75 x 5 mm^3 CsI(Tl) scintillator read out by \na SiPM array, covering the energy range from ~50 keV to ~1000 keV. To \nincrease the duty cycle and the downlink rate, we are continuously \nupgrading the on-board data acquisition software stack. The ground \nsegment is also supported by the radio amateur community and it takes \nadvantage of the SatNOGS network for increased data downlink volume."
}