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Possible Orphan Transient Detection at PGC143111 galaxy by MASTER

ATel #8166; E. Popova, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), R. Rebolo Lopez, M. Serra-Ricart, G. Israelian, N. Lodieu, L. Suarez-Andres ( Instituto de Astrofísica de Canarias), V. Kornilov, N. Tiurina, P. Balanutsa (M. V.Lomonosov Moscow State University, SAI), N. Samus (SAI MSU, INASAN), O. Gress, N. Budnev, K. Ivanov (Irkutsk State University, Applied Physics Institute), D. Buckley, S. Potter, A. Knyazev, M. Kotze (South African Astronomical Observatory), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Krushinskiy (Ural Federal University), Yu. Sergienko, A. Gabovich, V. Yurkov (Blagoveschensk Educational State University)
on 14 Oct 2015; 14:39 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Black Hole, Gamma-Ray Burst, Neutron Star, Transient, Variables

Referred to by ATel #: 8171, 8198

MASTER OT J000008.72-334156.5 discovery near the PGC143111 galaxy

MASTER-IAC auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 00h 00m 08.72s -33d 41m 56.5s on 2015-10-13.98017 UT.

The OT unfiltered magnitude is 17.6m (the limit is 19.9m).

The OT decay is seen in 3 images during 22 minutes from 17.6 up to 19.8. There is no minor planet at this place. We have reference image without OT on 2015-07-14.939 UT with unfiltered magnitude limit 20.7m in MASTER-SAAO database.

There is PGC143111 galaxy. The OT offset is 3.3"W and 21"S.

Deep observations are required.

There were no detection at this time at SWIFT, MAXI, INTEGRAL and Konus-Wind(up to this moment).
The nearest in time alert was Fermi GBM (15/10/13 12:15:46.20 RA=114.733,-36.833,ErB=7.33) , but it is too far from OT.

There is only W-mags from WISE in VIZIER database, but no JHK. CRTS observed this area, but didn't see any source (and POSS too).

Possible scenario:
there are 3 possibilities: to be an orphan in PGC143111, to be an UVCet in MW (but the amplitude is too high for it), and a OT of unknown nature. So the mankind needs deep obervations.

The discovery and reference images are available at http://master.sai.msu.ru/static/OT/MASTER000008.72-334156.5.jpg.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net