OT detected by MASTER-SAAO during Inspection Two Fermi GRB

ATel #6927; V. Shumkov, V. Lipunov, E. Gorbovskoy, N. Tiurina, D. Denisenko, A. Kuznetsov, M. Pruzhinskaya, A. Rufanov, V. Vladimirov, V. G. Kornilov (Moscow State University, SAI), D. Buckley, S. Potter, A. Kniazev, M. Kotze (SAAO), K. Ivanov, S. Yazev, N. Budnev, ; O. Gress, V. Poleshchuk, E. Konstantinov (Irkutsk State University) A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS) V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University),V. Shumkov, S. Shurpakov (MASTER team members)
on 15 Jan 2015; 10:58 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER OT J074858.45-655344.6 - possible CV?

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 07h 48m 58.45s -65d 53m 44.6s on 2015-01-15.045 UT. The OT unfiltered magnitude is 16.9m (the limit is 19.7m).

There are 2 images with OT. There is no minor planet at this place.

We have reference image without OT on 2014-12-21.955 UT at MASTER-SAAO database with 19.9m unfiltered magnitude limit.

It is remarkable that this OT was found in process of FERMI GRB150114 (trigger N 442964532) error box inspection. The reference image also was obtained due to inspection another FERMI GRB141221 (trigger N 440890311) error box.

The error boxes map is available at http://master.sai.msu.ru/static/MASTER_OT_J074858.45-655344.6.png

It seems chance coincidence.

The object is not present in any catalogues, including AAVSO VSX. There is nothing at this position on DSS plates to the limiting magnitude 20. Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J074858-655344-JRIR5x5.jpg (2x zoom). This area of sky is not covered by SDSS and GALEX.

Follow up observations are required.

The discovery and reference images are available at http://master.sai.msu.ru/static/OT/074858.45-655344.6.png

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