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MASTER: bright OT near nuclei of spiral Sloan galaxy

ATel #8423; P. Balanutsa, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), R. Rebolo Lopez, M. Serra-Ricart, G. Israelyan, N. Lodieu(IAC), N. Tiurina, V. Kornilov, A. Kuznetsov, O. Gress, D. Vlasenko, I. Gorbunov, E. Popova, V. Vladimirov, V. Shumkov (M. V. Lomonosov Moscow State University, Sternberg Astronomical Institute), S. Potter, M. Kotze (South African Astronomical Observatory), S. Shurpakov
on 17 Dec 2015; 10:09 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 8440

MASTER OT J073857.06+182648.2 discovery - the first days of PSN in Sloan galaxy nuclei

MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 07h 38m 57.06s +18d 26m 48.2s on 2015-12-17.01177 UT.
The OT unfiltered magnitude is 17.8m (the limit is 19.9m).

The OT is seen in 5 images (2015-12-17 00:13:07.828 - 00:35:23.004 UT).
We have reference image without PSN on 2015-12-03.14234 UT with unfiltered magnitude limit 19.5m, and on 2015-12-12.0924 UT with unfiltered m_lim=20.3 and m_galaxy~20.2
Spectral observations are required.

This PSN is in 0.4arcsec from the Sloan galaxy

The dicovery and reference images are available at http://master.sai.msu.ru/static/OT/073857.06182648.2.png
Spectral observations are required.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net