Possible pure SN Ia near PGC 60984 detected by MASTER

ATel #5600; D. Denisenko, M. Pruzhinskaya, V. Lipunov, E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, A. Rufanov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of Pulkovo Observatory), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), P. Podvorotny, V. Shumkov, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 26 Nov 2013; 14:59 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER OT J175048.49+471150.9 - Possible Supernova in PGC 60984

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 17h 50m 48.49s +47d 11m 50.9s on 2013-11-26.43991 UT. The OT unfiltered magnitude is 17.0m (limit 18.7m). The OT is seen in 5 images. There is no minor planet at this place. We have reference image without OT on 2013-03-30.72646 UT with unfiltered magnitude limit 18.6m. There is nothing at this position on the combination of digitized Palomar plates to limiting magnitude ~22 and in SDSS to m_lim~23.

The OT is located 44.3" west and 0.1" south of the center of PGC 60984 listed in HyperLeda as S0-a type galaxy. Distance modulus m-M=35.80 corresponds to the absolute magnitude -18.8 which is close to the maximum brightness of a typical Ia-type supernova. This is possibly a "pure" SN Ia (Pruzhinskaya et al., Astron. Lett., Vol. 37, pp. 663-669, 2011), see also SN 2013D (ATel #4702, Balanutsa et al., 2013). Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/175048.49471150.9.jpg

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