TITLE: GCN CIRCULAR NUMBER: 18804 SUBJECT: LIGO/Virgo G211117: MASTER OTs 26.XII.2015 - 01.I.2016 DATE: 16/01/02 15:03:27 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov Lomonosov Moscow State University, Sternberg Astronomical Institute 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 Kislovodsk Solar Station of the Pulkovo Observatory N.M. Budnev, O. Gress, K. Ivanov Irkutsk State University V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk We covered northern and small part of the southern segment of LIGO/Virgo G211117 (~ 77.8% of the total probability and 99.3% of the Northen segment)) by MASTER-IAC, MASTER-SAAO, MASTER-Amur, MASTER-Tunka and MASTER-Kislovodsk) several times. The covering map is available at http://master.sai.msu.ru/static/OT/G211117_master2.png The map of image limits is available at http://master.sai.msu.ru/static/OT/G211117.png Below you can find the results of the week observations possible Gravitational Wave Burst LIGO/Virgo G211117 by MASTER Global Net: 1). MASTER OT J020906.21+013800.1 - possible OT in PGC Galaxy. Lipunov et al., GCN #18729 https://gw-astronomy.org/circs/18729.lvc3 D'Avanzo et al., GCN #18775 https://gw-astronomy.org/circs/18775.lvc3 I.Steele GCN #18782 https://gw-astronomy.org/circs/18782.lvc3 2). MASTER OT J034313.67+320044.9 - 19.0m flare young star is not connected with LIGO/Virgo G211117 event. MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 03h 43m 13.67s +32d 00m 44.9s on 2015-12-29.94159 UT. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/034313.67320044.9.png 3). MASTER OT J025756.02+285337.6 (PS15dpa, Smit et al., GCN 18786) - 19.5 mag PSN in SDSS9 galaxy MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 02h 57m 56.02s +28d 53m 37.6s on 2015-12-31.97184 UT. The OT unfiltered magnitude is 19.5m (limit 20.3m). The OT is seen in 9 images. We have reference image without OT on 2015-11-09.06204 UT with unfiltered magnitude limit 20.6m. There are 3 SDSS9 galaxies: J025756.06+285337.9 galaxy with offset 0.7 arcsec. J025756.14+285339.5 galaxy with offset 2.5 arcsec. J025755.75+285339.7 galaxy with offset 4.1 arcsec. Spectral observations are required. But its seems very far for Gravitational Wave Source. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/025756.02285337.6.png 4). MASTER OT J150113.71-734333.8 discovery - bright (14.5) high amplitude (>7.5mag) outburst. Dwarf Nova? MASTER-SAAO auto-detection system (http://www.astronomerstelegram.org/?read=8472 ) discovered OT source at (RA, Dec) = 15h 01m 13.71s -73d 43m 33.8s on 2015-12-25.016 UT. The OT unfiltered magnitude is 14.5m (the limit was 18.0m). 5). MASTER OT J142741.38-330531.7 discovery - 14.9 flare BLAZAR with Gamma-ray counterpart 2 hours before trigger ( http://www.astronomerstelegram.org/?read=8472 ) MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 14h 27m 41.38s -33d 05m 31.7s on 2015-12-26.07199 UT. The OT unfiltered magnitude is 14.9m (limit 17.7m). We have reference image without OT on 2015-01-19.07569 UT with unfiltered magnitude limit 19.4m. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/142741.38-330531.7_1.png 6.) MASTER OT J012034.47-042003.6 possible detection - 19.8 posible OT in SDSS9 galaxy, but its very far for GWB. MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 01h 20m 34.47s -04d 20m 03.6s on 2016-01-01.86469 UT. The OT unfiltered magnitude is 19.8m (limit 20.5m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2015-09-14.17252 UT with unfiltered magnitude limit 21.2m. There is SDSS9 J012034.29-042001.9 galaxy with 3 arc sec offset. Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/012034.47-042003.6.png 7). MASTER OT J201539.32-693614.7 - Dwarf Nova (no coonection with GWB). MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 20h 15m 39.32s -69d 36m 14.7s on 2016-01-01.79416 UT. The OT unfiltered magnitude is 17.9m (limit 19.5m). We have reference image without OT on 2016-01-01.78390 UT with unfiltered magnitude limit 18.6m. Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/201539.32-693614.7.png The map of our OTs is vailable at http://master.sai.msu.ru/static/OT/G211117.png THis circular can be cited.