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Flaring Blazar and two CVs detected by MASTER

ATel #5589; D. Denisenko, E. Gorbovskoy, V. Lipunov, N. Tiurina, P. Balanutsa, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, A. Rufanov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of Pulkovo Observatory), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), 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 18 Nov 2013; 19:01 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Blazar, Cataclysmic Variable, Quasar, Transient

MASTER OT J002932.32+502554.2 - new CV

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 00h 29m 32.32s +50d 25m 54.2s on 2013-11-11.70049 UT. The OT unfiltered magnitude is 17.2m (limit 18.9m). The OT is seen in 6 images. We have reference image without OT on 2012-09-19.70023 UT with unfiltered m_lim=19.6.

The object is not present in any catalogs. There is nothing at this position on digitized POSS-I and POSS-II plates. However, object is visible on Quick-V photovisual plate of 1983-11-06, likely detected in outburst. Comparison of BRIR and OVR color-combined finder charts is uploaded to http://master.sai.msu.ru/static/OT/J002932+502554-DSS4x4.jpg (2x zoom). This area of sky in Cassiopeia is not covered by CRTS, SDSS and NEAT.

Based on the amplitude of variability we suggest that MASTER OT J002932.32+502554.2 is a new cataclysmic variable (dwarf nova in outburst). Follow up observations are desirable. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/002932.32502554.2.png

MASTER OT J110201.44+701857.3 - new blazar

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 11h 02m 01.44s +70d 18m 57.3s on 2013-11-14.01502 UT. The OT unfiltered magnitude is 17.6m (limit 19.1m). The OT is seen in 6 images. We have reference image without OT on 2010-11-13.90809 UT with unfiltered m_lim=19.3.

The OT at quiescence is identical to the blue star-like object USNO-B1.0 1603-0089935 (11 02 01.378 +70 18 57.54 B1=20.61 R1=19.85 B2=20.24). Color-combined (BRIR) finder chart is uploaded to http://master.sai.msu.ru/static/OT/J110201+701857-BRIR.jpg (10'x10' FOV). There is also an UV counterpart GALEX J110201.6+701858 (FUV=21.01+/-0.30, NUV=20.33+/-0.16) and infrared source WISE J110201.34+701857.2 (W1=16.00, W2=15.11, W3=12.65, W4=9.27).

There is a radio source at this position NVSS J110201+701857 = BWE 1058+7035. It is listed in Atlas of Radio/X-ray associations (Flesch, 2010) with a 70% probability of being a QSO. Redshift is unknown. Object is not present in 1RXS and 2MASS. It was at minimum light on 9 DSS plates. This area of sky in Ursa Major is not covered by SDSS, CRTS and NEAT.

Follow up multi-wavelength observations and polarization measurements are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/110201.44701857.3.png

MASTER OT J070844.85+194820.1 - new CV

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 07h 08m 44.85s +19d 48m 20.1s on 2013-11-16.88913 UT. The OT unfiltered magnitude is 15.7m (limit 18.0m). The OT is seen in 14 images. We have reference image without OT on 2012-01-21.86396 UT with unfiltered m_lim=20.1.

There is a faint blue star at the position of OT on digitized Palomar plates. It is present in GSC 2.3.2 with coordinates 07 08 44.911 +19 48 20.10 and magnitude jmag=21.78. Color-combined (BRIR) finder chart is uploaded to http://master.sai.msu.ru/static/OT/J070844+194820-BRIR5x5.jpg (2x zoom). There is also a faint UV counterpart GALEX J070844.8+194819 (NUV=22.68+/-0.44).

There is nothing at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. Object was at minimum light on 9 DSS plates, 42 NEAT images in 2000-2002 and 75 Mount Lemmon Survey images in 2005-2013. This area of sky in Gemini is not covered by SDSS.

Based on the blue color and outburst amplitude (~6m), MASTER OT J070844.85+194820.1 is most likely a dwarf nova of SU UMa (UGSU) type in superoutburst. Follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/070844.85194820.1.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net