GCN Circular 33088
Subject
GRB 221216A: Detection by VZLUSAT-2
Date
2022-12-20T13:17:55Z (a year ago)
From
Jakub Ripa at Masaryk University <245487@mail.muni.cz>
J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory),�� N. Werner (Masaryk
U.), M. Ohno (Hiroshima U.),�� L. Meszaros, B. Csak (Konkoly
Observatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka, F.
Hroch, M. Dafcikova, N. Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec,
J. Kapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo
(Needronix), G. Galgoczi (Wigner Research Center/Eotvos U.), N. Uchida
(ISAS/JAXA), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), Y. Fukazawa, K.
Hirose, H. Matake (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe
(Rikkyo U.), L. L. Kiss (Konkoly Observatory),�� T. Mizuno (Hiroshima
U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), K. Torigoe
(Hiroshima U.), P. Svoboda, V. Daniel, J. Dudas, M. Junas, J. Gromes
(VZLU), I. Vertat (FEL ZCU) -- the VZLUSAT-2/GRB payload collaboration.
The long-duration GRB 221216A (Fermi/GBM detection: Dunwoody et al., GCN
Circ. 33077; Dichiara et al., GCN Circ. 33067; GECAM-B trigger num. 105)
was detected by the GRB detector on board of the VZLUSAT-2 3U CubeSat
(https://www.vzlusat2.cz/en/).
The data acquisition was performed by GRB detector unit no. 1 and the
count rate curve shows the peak time at 2022-12-16 11:21:28 UTC. The T90
duration was measured to be 90 s with the light curve resolution of 1 s.
The significance during T90 reaches 9.5 sigma.
The light curve obtained by VZLUSAT-2 is available here:
https://vzlusat2.konkoly.hu/static/share/GRB221216A_GCN_VZLUSAT2.pdf
GRB detectors on VZLUSAT-2 are a demonstration payload for a future
CubeSats constellation (Werner et al. Proc. SPIE 2018). Two GRB modules
of VZLUSAT-2 are placed in a perpendicular manner and each consists of a
75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the
energy range from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022
January 13 from Cape Canaveral.