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Three OTs detected by MASTER

ATel #4570; P. Balanutsa, D. Denisenko, V. Lipunov, N. Tiurina, E. Gorbovskoy, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov, V. Echeistov (Moscow State University, SAI), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov, A. Punanova (Ural Federal University), 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 the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov (Blagoveshchensk Educational University), S. Shurpakov, P. Podvorotny, V. Shumkov, (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (Observatorio Astronomico Felix Aguilar; OAFA)
on 13 Nov 2012; 12:44 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient

MASTER OT J022748.93+102526.4 - new CV in a high state?

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 02h 27m 48.93s +10d 25m 26.4s on 2012-11-12.78439 UT. The OT unfiltered magnitude is 19.0m (limit 19.6m). The OT is seen in 2 images. We have reference image without OT on 2010-11-01.95389 UT with unfiltered magnitude limit 19.9m.

Nothing is visible at this position on Palomar plates to the limiting magnitude ~21m. No object is present in 2MASS, USNO-B1.0, GSC 2.3.2, 1RXS and GCVS catalogs, as well as in AAVSO VSX. This area is not covered by SDSS and GALEX.

This area of sky was observed by the NEAT project many times in 1996-2006. We have analysed 74 good quality images obtained on 25 different nights from 1996 Oct. 11 to 2004 Feb. 02. The object was visible on all nights at about 19m, except for Sep. 2002 when it has faded below the detection limit (~20.5m). Comparison of Sep. 2002 and Dec. 2002 NEAT images is posted at http://master.sai.msu.ru/static/OT/J022748+102526-NEAT.jpg

Based on the long term light curve we suggest that MASTER OT J022748.93+102526.4 is a new cataclysmic variable of VY Scl type ("antinova") or AM Her type (polar) in a high state. Alternatively, but less likely, it can be an active galactic nucleus. Spectroscopic confirmation is required.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/022748.93102526.4.png

MASTER OT J014711.67+091529.7 - PSN in SDSS J014711.57+091531.3

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 01h 47m 11.67s +09d 15m 29.7s on 2012-11-12.77925 UT. The OT unfiltered magnitude is 18.4m (limit 19.5m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-12-07.70512 UT with unfiltered magnitude limit 19. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/014711.67091529.7.png

There is a galaxy within 2" of the OT in SDSS DR8 SDSS J014711.57+091531.3 with r=22.36.

Spectroscopic confirmation is required.

MASTER OT J033855.64+164943.5 - PSN in PGC1517827

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 03h 38m 55.64s +16d 49m 43.5s on 2012-11-12.96933 UT. The OT unfiltered magnitude is 18.0m (limit 19.7m). The OT is seen in 7 images. There is no minor planet at this place.

We have reference image without OT on 2010-12-03.84887 UT with unfiltered magnitude limit 22.5m.

The PSN has 1.3E and 21.8N arcsec offset from PGC1517827 galaxy There is SDSS8 galaxy J033855.75+164940.6 with 3.2 arcsec offset (Rmag = 22.5).

Spectral observations are required.

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