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GCN Circular 21719

LIGO/Virgo G299232/PGWB170825.55: MASTER Global-Net OT inside NGC1343 discovery
2017-08-27T08:01:19Z (7 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V.M.Lipunov, E. Gorbovskoy, V.G.Kornilov, N.Tyurina, V.Shumkov, D.Kuvshinov, 
P.Balanutsa,  O.Gress, A.Kuznetsov, M.I.Panchenko, A.V.Krylov, I.Gorbunov
Lomonosov Moscow State University, Sternberg Astronomical Institute

V.Yurkov, Yu.Sergienko, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk

N.M. Budnev, O. Gress, K. Ivanov, S.Yazev
Irkutsk State University

A. Tlatov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

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

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

Global MASTER robotic net automatically starting folow-up inspection of 
the bayestar-HLV  map of the G299232/PGWB170825.55* event time (2017-08-25 
13:13:37 UTC, LVC GCM 21693) by 7 robots MASTER telescopes.

Table I. Time starting MASTER-Net follow-up observations.

Site              |  UT start               | T-Ttrig, Ks
MASTER-SAAO       | 2017-08-25 20:06:39.328 | 24.782
MASTER-Kislovodsk | 2017-08-25 20:09:22.169 | 24.945
MASTER-IAC        | 2017-08-25 20:28:20.207 | 26.083
MASTER-OAFA       | 2017-08-25 23:08:25.365 | 35.688
MASTER-Amur       | 2017-08-26 11:37:19.06  | 80.622
MASTER-Tunka      | 2017-08-26 13:28:02.508 | 87.265

MASTER OTJ033744.97+723159.0 discovery near NGC1343.

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) 
= 03h 37m 44.97s +72d 31m 59.0s on 2017-08-27.01649 UT.
The OT unfiltered magnitude is 17.0m (limit 18.2m).

The OT is seen in 4 images. There is no minor planet at this place.

We have reference image without OT on 2012-12-17.70730 UT with unfiltered 
magnitude limit 19.4m.

The discovery and reference images 
are available at

The MASTER covering map is available at

*PGWB170825.55 - Possible Gravitational Wave Burst 2017 Aug 25.55 UT - 
internal disignation for electromagnetic  people.

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