Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 20716

LIGO/Virgo G274296: Kanata 1.5m optical spectroscopy of MASTER optical transient
2017-02-22T00:37:01Z (7 years ago)
Michitoshi Yoshida at J-GEM <>
T. Nakaoka, T. Abe, M. Chogi, M. Yoshida, Y. Utsumi and K. S.
Kaawbata (Hiroshima University) on behalfof J-GEM collaboration,

We performed optical spectroscopy of the optical transient MASTER
OT J105519.53+365834.1PSN in PGC 032819 (Lipunov et al. GCN 20712)
with 1.5-m Kanata telescope at Higashi-Hiroshima Observatory on
2017 Feb 21. The spectrum shows a broad absorption line around
620 nm. The overall features suggest that this PSN is a SN 1991T
like bright Type Ia supernova around maximum brightness. A
comparison with a library of supernova spectra using GELATO
(Harutyunyan et al. 2008, A.Ap. 488, 383) suggests that the
spectrum gives a good match to SN 1998es at -3.5 days before
B-band maximum.
Looking for U.S. government information and services? Visit