GCN Circular 31949
Subject
Correction to 31937: GRB 220421B: Detection by VZLUSAT-2
Date
2022-04-25T16:52:18Z (3 years ago)
From
Jakub Ripa at Masaryk University <ripa.jakub@mail.muni.cz>
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.
In Ripa et al. GCN 31937 we reported a detection of the GRB 220421B.
Based on the GOES-16 and GOES-17 X-ray data the reported burst is
probably not a GRB but a solar flare. The GOES X-ray light curves show a
peak at 2022-04-21 21:04:00 UT which coincides with the peak in the rate
curves from the GRB detectors on board the VZLUSAT-2 nanosatellite. The
Sun was in the field of view of the VZLUSAT-2/GRB detectors.
We apologize for any inconvenience.