GCN Circular 32797
Subject
SGR 1935+2154: Bursting activity detected by VZLUSAT-2
Date
2022-10-18T22:39:15Z (2 years 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. Dafcikova, N.
Husarikova, M. Topinka, F. Hroch, 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 recently active SGR 1935+2154 (Fermi-GBM detection: Malacaria et
al., GCN Circ. 32737, Konus-Wind detection: Ridnaia et al., GCN Circ.
32768) was detected by the GRB detector module no. 1 on board of the
VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/).
The list of detected SGR bursts with their significance is:
Date and time in UTC�������� SNR
2022-10-12 23:26:41���������� 17.6
2022-10-13 02:02:43���������� 16.5
2022-10-13 22:41:28���������� 125
The light curves obtained by VZLUSAT-2 are available here:
https://vzlusat2.konkoly.hu/static/share/SGR_1935_2154_GCN_VZLUSAT-2.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.