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New CV and Blazar Flare detected by MASTER

ATel #6106; N. Tiurina, D. Denisenko, V. Lipunov, E. Gorbovskoy, P. Balanutsa, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational 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 Pulkovo Observatory), 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 29 Apr 2014; 14:45 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J222900.37+263705.8 - new CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 22h 29m 00.37s +26d 37m 05.8s on 2014-04-27.77581 UT. The OT unfiltered magnitude is 15.6m (limit 17.1m). The OT is seen in 6 images. There is no minor planet at this place. We have reference image without OT on 2012-09-24.61850 UT with unfiltered magnitude limit 19.1m. Two previous outbursts were observed by MASTER-Amur on the single images obtained on 2012-12-28.378 UT (15.2m) and on 2013-05-13.721 UT (14.9m).

The OT at quiescence is identical to the blue star SDSS J222900.35+263706.8 (u=20.47 g=20.56 r=20.45 i=20.26 z=19.85) = USNO-B1.0 1166-0582192 (22 29 00.378 +26 37 07.19 B1=20.15 R1=19.22 B2=20.73 R2=19.23 I=N/A). There is also an UV counterpart GALEX J222900.3+263707 (NUV=21.37+/-0.19).

There is nothing at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. Catalina Sky Survey light curve of CSS J222900.3+263708 shows two additional outbursts: on 2010-07-04 (16.0m) and on 2011-12-30 (16.1m). There was a supernova CSS130605:222900+263430 just 2.5' to the south of the OT.

Based on the blue color, outburst amplitude (~5m) and past variability, MASTER OT J222900.37+263705.8 is a new cataclysmic variable, most likely a dwarf nova of UGSU (SU UMa) type. Follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/222900.37263705.8.png

MASTER OT J130303.20+243356.1 - flare of blazar at z=0.993

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 13h 03m 03.20s +24d 33m 56.1s on 2014-04-28.64228 UT. The OT unfiltered magnitude is 16.9m (limit 19.2m). The OT is seen in 11 images. There is no minor planet at this place. We have unfiltered reference image with the object at 20.2m on 2011-04-02.79308 UT (limit 22.0m). The object was fainter than 18.9m on MASTER-Tunka images of 2014-02-01.842 UT.

The OT at quiescence is identical to gamma-ray loud blazar 2FGL J1303.1+2435 = B1300+2449 = FIRST J130303.2+243355 = SDSS J130303.21+243355.6 (g=19.78 r=19.40 i=19.16) with the spectroscopic redshift z=0.993. There is also an infrared detection WISE J130303.21+243355.7 (W1=13.27 W2=12.21 W3=9.38 W4=7.11).

The current magnitude is close to the historical brightest state of this object observed in the optical band by Catalina Sky Survey in 2009 (16.7m), see ATel #2051 and CSS light curve. Multiwavelength follow up observations are encouraged. MASTER detection and reference images are available at: http://master.sai.msu.ru/static/OT/130303.20243356.1.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net