MASTER Early Optical Polarization Observations of Black Hole Candidate V404 Cyg and 10 Minutes Polarization Variability Detection.
ATel #7696; V. Lipunov (Lomonosov MSU), R. Rebolo (IAC), E. Gorbovskoy (Lomonosov MSU),M. Serra-Ricart (IAC), O. Gress (ISU), N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias), V. Kornilov, N. Tiurina, P. Balanutsa, E. Popova, V. Chazov (Lomonosov Moscow State University, Sternberg Astronomical Institute), V. Krushinsky (Ural Federal University), N. Budnev, K. Ivanov (Applied Physics Institute of Irkutsk State University), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk Solar Station of of the Pulkovo observatory RAS), D. Buckley, S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory), Yu. Sergienko, V. Yurkov, A. Gabovich (Blagoveschensk State Educational University)
on 23 Jun 2015; 12:17 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Black Hole
MASTER Robotic Net (MASTER-Net: http://observ.pereplet.ru ) was started observation of one of the best Black Hole candidate - V404 Cyg by GCN Swift trigger N 643949 at 2015-06-15 18:34:09 UT (Barthelmy et. al GCN #17929 ) i.e. 22 sec after notice time and 150 sec after trigger time. The 5 MASTER robotic twin telescopes every clear night observed V404 Cyg.
Site DATE UT Start DATE UT Finish Exp Duration Polarisation
Tunka 2015-06-15 18:34:23 2015-06-15 19:33:48 40 1.0 h |-
2 Ural 2015-06-15 18:34:09 2015-06-15 19:42:09 10 1.1 h /\
3 IAC 2015-06-18 00:09:07 2015-06-18 05:26:19 190 5.2 h |-
4 Tunka 2015-06-18 14:45:47 2015-06-18 19:44:43 96 5.0 h
5 Kisl 2015-06-18 18:50:29 2015-06-19 00:34:30 176 5.4 h
6 SAAO 2015-06-18 22:19:33 2015-06-19 04:42:30 282 6.5 h
7 Tunka 2015-06-19 14:21:47 2015-06-19 19:12:1 90 4.9 h
8 Kisl 2015-06-19 18:08:38 2015-06-19 22:02:20 108 3.1 h
9 SAAO 2015-06-19 21:26:05 2015-06-20 04:41:46 318 7.3 h
10 Tunka 2015-06-20 16:07:32 2015-06-20 19:33:50 59 3.5 h
11 Kisl 2015-06-20 17:55:38 2015-06-20 20:24:19 36 3.5 h
12 SAAO 2015-06-20 21:59:20 2015-06-21 04:43:37 320 6.7 h
13 Tunka 2015-06-21 19:04:51 2015-06-21 19:36:31 26 0.5 h
14 SAAO 2015-06-21 21:16:36 2015-06-22 04:43:06 320 7.5 h
15 Kisl 2015-06-21 21:30:56 2015-06-22 00:36:31 78 3.0 h
16 SAAO 2015-06-22 21:15:28 2015-06-23 04:43:58 260 7.5 h
We have more than 2400 mesuarments now;
The preliminary photometry of MASTER-Net telescopes are available at http://master.sai.msu.ru/static/OT/MASTERV404.jpg
We see > 8% linear polarisation ( that corresponds to ATEL #7678 , ATEL #7674). We defenitely detect polatizations variability at time scale ~10 minutes.
The Ural light curves (upper fig.) VS polarization (below) data are available at http://master.sai.msu.ru/static/v404syg_tu.png
The observations are continued.
MASTER Global Robotic Net
