GCN Circular 20849
Subject
SN MASTER OT J042250.16-820415.4 is the possible optical counterpart of the gravitational waves event LIGO/Virgo G274296
Date
2017-03-11T17:23:15Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov2007@gmail.com>
V.M. Lipunov, E. Gorbovskoy, N.Tyurina, V.G. Kornilov,
P.Balanutsa, A.Kuznetsov, V.Shumkov, O.Gress, M.I.Panchenko, A.V.Krylov,
I.Gorbunov
Lomonosov Moscow State University, Sternberg Astronomical Institute
R.Podesta, C.Lopez, F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA) , National University of San
Juan, Argentina
H. Levato, C. Saffe
Instituto de Ciencias Astronomicas de la Tierra y del Espacio (ICATE),
San Juan, Argentina
N.M. Budnev, O. Gress, K. Ivanov
Irkutsk State University
D.Buckley, S. Potter, M. Kotze,
South African Astronomical Observatory
R. Rebolo, M. Serra-Ricart, G. Israelian, N.Lodiu
The Instituto de Astrofisica de Canarias
A. Tlatov, V.Sennik, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk
MASTER-OAFA (Argentina) auto-detection system discovered MASTER OT
J042250.16-820415.4 as bright OT
at (RA, Dec) = 04 22 49.70 -82 04 10.0 on 2017-02-19.12023UT during
inspection (Lipunov et al. GCN 20696, GCN 20711)
of LIGO/VIRGO G274296 event (Peter Shawhan, GCN 20689)
http://master.sai.msu.ru/static/OT/MASTEROTJ042250.16-820415.4.jpg .
This SN is located near the maximal probability area of southern part of
this GW event error-box.
MASTER-SAAO started inspection of this SN every night with W,B,I,R and V
filters (21 nights at this moment).
We have good accuracy of its photometry, i.e. the detailed registered
WBIRV light curve before and during its maximum. "W" - is the unfiltered.
This SN is in 2.6E,11.9N offset from the center of galaxy with low surface
brightness ESO015-010 (PGC014998) with Btc =16.54m
and Bri25=24.63m (mean surface brightness within 25th-mag isophote).
On the 25th of Feb 2017 PESSTO detected its type (Ia) and z=0.02 (Nyholm
et al. ATel #10131)
We carried out a preliminary joint analysis of the light curves of
MASTER OT J042250.16-820415.4 with respect to supernovae of the similar
brightness in order to determine the time of explosion of this supernova.
Figure http://master.sai.msu.ru/static/MASTEROTJ042250.16-820415.4.png
shows that MASTEROTJ042250.16-820415.4
supernova reach maximum brightneses ~ 15 days after LIGO G274296 trigger.
This fact shows that the SN explosion time is very close to the LIGO
G274296 trigger and this SN could be the progenitor of this event.
The ESO 15-10 galaxy photometrical distance is about 84.6 Mpc for
Omega_Lambla=0.7+-0.1, Omega_tot=1 an H=72+/-2 km/s/Mpc. The maximal
magnitute in B filter is about
M(B) = -19.5+/-0.1
The error include the uncertainty of the cosmological parameters.
This is preliminary analysis of the observations.
Recently one of us noted that double O-Ne-Mg white dwafs merging can be
produce powerfull non spiralling waveform gravitational waves for
LIGO/VIRGO type interferometers (Lipunov V.M., arXiv: AstroPh,
submission number 1830243; will be appear
13.03.2017; submitted to New Astronomy).
So we conclude that SNIa MASTER OT J042250.16-820415.4 in ESO 15-10 galaxy
is the real optical counterpart of the gravitational
waves event LIGO/Virgo G274296 .
All observations are required.