J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), M. Ohno (Eotvos
U./Hiroshima U.),�� N. Werner�� (Masaryk U.),�� L. Meszaros (Konkoly
Observatory), H. Takahashi (Hiroshima U.), B. Csak (Konkoly
Observatory), M. Topinka, F. Munz, F. Hroch (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.
A long-duration GRB 220608B (Fermi/GBM trigger 676366592) was detected
by a GRB detector on board of the VZLUSAT-2 3U CubeSat
The data acquisition was performed by the GRB detector unit no. 1. The
5.9 sigma detection was confirmed at 2022-06-08 07:36:39 UTC. The GRB
has the T90 duration of 27 s.
The light curve obtained by VZLUSAT-2 is available here:
The light curve obtained by VZLUSAT-2 with the shape and timing matches
well the light curve obtained by Fermi/GBM. The GOES X-ray flux does not
show any excess. Therefore our observation is consistent with this event
being a GRB.
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.