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MASTER Pre-Discovery Detection of Possible Nova in M31

ATel #6787; V. Shumkov, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, E. Popova (Lomonosov Moscow State University, SAI), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk Solar Station of Pulkovo Observatory), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), V. Yurkov, A. Gabovich, Y. Sergienko, E. Sinyakov (Blagoveshchensk Educational University), S. Shurpakov (MASTER team member)
on 6 Dec 2014; 13:13 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Nova, Transient

MASTER OT J004325.67+411211.0 - Possible Nova in M31

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 00h 43m 25.67s +41d 12m 11.0s on 2014-12-05.60549 UT. The OT unfiltered magnitude is 16.9m (limit 18.6m). The OT is seen in 7 images. There is no minor planet at this place. We have reference image without OT on 2011-12-16.67293 UT with unfiltered magnitude limit 21.2m. The object was present on MASTER-Kislovodsk image on 2014-12-04.60245 UT at unfiltered magnitude 17.7 (limit 18.8m). It was not visible on 2014-12-03.60257 UT image (limiting magnitude 18.0).

The OT is located 467" east and 237" south of the nucleus of M31 = NGC 224 galaxy. It is identical to Possible Nova PNV J00432572+4112119 discovered by Koichi Itagaki on 2014-12-05.454 UT. MASTER-Kislovodsk observations are constraining the outburst time between Dec. 03.602 and Dec. 04.602 UT.

Spectral confirmation is required. MASTER discovery, prediscovery and reference images are available at: http://master.sai.msu.ru/static/OT/004325.67411211.0.jpg

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net