{
  "bibcode": "2023GCN.33320....1D",
  "body": "M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner\n(Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak\n(Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, J.-P.\nBreuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal,  A. Povalac (Brno U.\nof Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo,\nM. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U.\nof Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H.\nPoon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos\nU.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G.\nFriss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi\n(Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss\n(Konkoly Observatory),  T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.),\nH. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima\nU.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U.\nTokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration.\n\nThe GRBAlpha 1U CubeSat (Pal et al. Proc. SPIE 2020) has detected a\ntransient event at the peak time 2023-02-11 17:36:19 with a duration of 13\ns and an overall significance of 7.5 sigma in the 70-110 keV band. This\nevent is temporally consistent with the Fermi/GBM trigger no. 697829776 and\nis likely an outburst from the Be/X-ray binary LS V +44 17 / RX\nJ0440.9+4431 (Fermi/GBM detection: GCN Circ. 33317).\n\nThe light curve obtained by GRBAlpha is available here:\n\nhttps://grbalpha.konkoly.hu/static/share/LSV+4417_RXJ0440.9+4431_GCN.pdf\n\nAll GRBAlpha detections are listed at:\nhttps://monoceros.physics.muni.cz/hea/GRBAlpha/\n\nGRBAlpha, launched on 2021 March 22, is a demonstration mission for a\nfuture CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector\nof GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a\nSiPM array, covering the energy range from ~50 keV to ~1000 keV. To\nincrease the duty cycle and the downlink rate, the upgrade of the on-board\ndata acquisition software stack is in progress. The ground segment is also\nsupported by the radio amateur community and it takes advantage of the\nSatNOGS network for increased data downlink volume.",
  "circularId": 33320,
  "createdOn": 1676326487000,
  "email": "500025@mail.muni.cz",
  "subject": "Outburst from LS V +44 17 / RX J0440.9+4431: Transient detection by GRBAlpha",
  "submitter": "Marianna Dafcikova at Masaryk University  <500025@mail.muni.cz>"
}