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Possible SNIa detected by MASTER

ATel #6638; P. Balanutsa, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, E. Popova, V. Vladimirov (Lomonosov Moscow State University, SAI), K. Ivanov, S. Yazev, N. Budnev, O. Gress, E. Konstantinov, O. Chuvalaev, V. Poleshchuk (Irkutsk State University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk Solar Station of Pulkovo Observatory), V. Yurkov, A. Gabovich, Y. Sergienko, E. Sinyakov (Blagoveshchensk Educational University), V. Shumkov, S. Shurpakov (MASTER team members)
on 29 Oct 2014; 07:50 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Supernovae, Transient

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 02h 21m 18.32s +40d 51m 15.8s on 2014-10-28.92205 UT. The OT unfiltered magnitude is 18.2m (limit 19.8m).

The OT is seen in 8 images. There is no minor planet at this place. We have reference image without OT on 2010-12-09.75513 UT with unfiltered magnitude limit 21.6m.

There is galaxy PGC2171875. Thh OT offset is 20.4E and 16.2N from galaxy.The SN type is Ia because large distance from the center where massive stars are absent.

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/022118.32405115.8.png

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