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New CV and Flaring Quasar discovered by MASTER

ATel #6686; P. Balanutsa, S. Shurpakov, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, 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), V. Shumkov (MASTER team member)
on 11 Nov 2014; 17:11 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Quasar, Transient

Referred to by ATel #: 6715

MASTER OT J184633.88+220016.1 - new CV

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 18h 46m 33.88s +22d 00m 16.1s on 2014-11-08.64657 UT. The OT unfiltered magnitude is 16.9m (limit 18.8m). The OT is seen in 5 images. There is no minor planet at this place. We have reference image without OT on 2014-07-25.82466 UT with unfiltered magnitude limit 19.7m.

There is a faint star (~22.5m) near the OT marginally visible on the sum of digitized Palomar plates. Color-combined DSS finder chart (3xBRIR) is uploaded to http://master.sai.msu.ru/static/OT/J184633+220016-BRIR5x5.jpg (2x zoom). Nothing is present at this position in 1RXS, USNO-B1, GSC, 2MASS, GCVS and AAVSO VSX. This area of sky in Hercules is not covered by SDSS and Catalina Sky Survey.

Based on the amplitude of variability (more than 5m), MASTER OT J184633.88+220016.1 is a new cataclysmic variable (dwarf nova) in outburst. Follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/184633.88220016.1.png

MASTER OT J005720.90+282557.1 - flaring QSO

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 00h 57m 20.90s +28d 25m 57.1s on 2014-11-10.86780 UT. The OT unfiltered magnitude is 19.1m (limit 19.9m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2011-08-25.02968 UT with unfiltered magnitude limit 19.9m.

The OT at quiescence is identical to the star-like object SDSS J005721.00+282557.3 (g=20.96 r=20.49 i=20.13). It has UV, infrared and radio counterparts GALEX J005720.9+282557 (NUV=21.7), AllWISE J005721.01+282557.3 (W1=15.15 W2=14.12 W3=11.66 W4=8.55) and NVSS 005720+282557, respectively.

Based on IR colors, UV and radio detections, MASTER OT J005720.90+282557.1 is likely a new flaring quasar. Multi-wavelength follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/005720.90282557.1.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net