GCN Circular 25908
Subject
LIGO/Virgo S190930t and S190930s: MASTER OT J205529.78+220725.5/AT2019rpr further analysis
Date
2019-10-01T19:30:08Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina,F.Balakin,P.Balanutsa,A.Kuznetsov, V.Vladimirov, D. Vlasenko, I.Gorbunov,
D.Zimnukhov,V.Senik, T.Pogrosheva, K.Pozdnyakov, A.Chasovnikov,V.Topolev,V.Shumkov, D.Kuvshinov(Lomonosov Moscow State University, SAI, Phys.Dep.),
R. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio Astronomico Felix Aguilar of San Juan Natioal Univeristy, OAFA Argentina ),
H.Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE SJNU),
R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),
D. Buckley(South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova(Irkutsk State University, API),
A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University)
MASTER OT J205329.99+224421.2 (GCN 25900) - optical transient discovered
at 2019-09-30 21:38:47UT in anonymous edge-on galaxy
is located in the center of LVC S190930s error-box (mass gap event at 752 +- 223 Mpc, Ttrig=2019-09-30 14:34:07 UT
LVC GCN #25871, Lipunov et al. GCN 25870; Lipunov et al.GCN 25900, Balanutsa et al., ATel 13151)
and also
inside LIGO/Virgo NS+BH S190930t (108 +-37Mpc, Ttrig=2019-09-30 13:35:41 UT
LVC GCN #25871, Lipunov et al. GCN #25870).
MASTER inspects both LVC error-boxes (PSN location is marked by *):
LIGO/Virgo S190930t real-time cover map https://master.sai.msu.ru/site/master2/ligo_1.php?id=10866
LIGO/Virgo S190930s cover map https://master.sai.msu.ru/site/master2/ligo_1.php?id=10856
We reobserved MASTER OT J205529.78+220725.5 in MASTER-Tavrida,
it became brighter on 6 images 2019-10-01 16:51:37- 18:15:11UT, m_OT~17.8.
In accordance with the distances for gavitational-wave alerts, we obtain
the following distance modulus and absolute magnitudes
LVC_alert Dist,Mpc Dist.modulus Mag (absolute)
S190930t (min) 71 34.3 -15.5
S190930t (max) 145 35.8 -17.0
S190930s (min) 528 38.6 -19.8
S190930s (max) 976 39.9 -21.2