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Two Active Quasars detected by MASTER

ATel #5725; S. Shurpakov, P. Balanutsa, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, 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), 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), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), P. Podvorotny, V. Shumkov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 5 Jan 2014; 18:59 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Quasar, Transient

MASTER OT J064552.41+411900.1 - active quasar

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 06h 45m 52.41s +41d 19m 00.1s on 2013-12-25.89263 UT. The OT unfiltered magnitude is 18.4m (limit 19.1m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-12-16.74597 UT with unfiltered magnitude limit 19.3m.

There is a faint stellar object within 1" of the OT in USNO catalog: USNO-B1.0 1313-0176642 (06 45 52.489 +41 19 00.65 B2=20.83 R2=19.85). Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J064552+411900-BRIR5x5.jpg (2x zoom). There is an UV source within 1.5" GALEX J064552.5+411901 (FUV=23.19+/-0.25 NUV=21.37+/-0.06) and IR source WISE J064552.47+411900.3 (W1=14.72+/-0.04 W2=13.79+/-0.05 W3=11.70+/-0.32). This area of sky in Auriga is not covered by SDSS.

The object was observed by Catalina Sky Survey with 131 positive detections from 2006 Feb. 04 to 2013 Apr. 22. It was gradually raising from ~21m in Feb. 2006 to ~18.5 in Oct. 2010, having remained at nearly the same level since then. CSS light curve is available at CRTS website: CSS J064552.6+411901.

Based on the slow large-amplitude variability, IR detection by WISE to 11.6 micron and large (NUV-W1) value of ~6.5, MASTER OT J064552.41+411900.1 is most likely an active QSO. Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/064552.41411900.1.jpg

MASTER OT J075342.80+165014.5 - active quasar

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 07h 53m 42.80s +16d 50m 14.5s on 2014-01-02.78801 UT. The OT unfiltered magnitude is 18.2m (limit 19.4m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-12-09.93050 UT with unfiltered magnitude limit 21.5m.

The object at quiescence is identical to the faint blue object SDSS J075342.88+165014.1 (u=21.22 g=20.79 r=20.55 i=20.59 z=20.19). There is an UV counterpart GALEX J075342.8+165014 (NUV=21.52+/-0.24) and IR source WISE J075342.97+165013.2 (W1=15.97+/-0.08 W2=14.86+/-0.09 W3=11.70+/-0.22 W4=8.86+0.43).

The object was observed by Mount Lemmon Survey with 139 positive detections from 2005 Dec. 01 to 2013 May 03. It is showing slow variability between ~21m and 19.2m. MLS light curve is available at CRTS website: MLS J075342.9+165014.

Based on the long-term variability, IR detection by WISE to 22.1 micron and large (NUV-W1) value of ~5.5, MASTER OT J075342.80+165014.5 is likely an active QSO. Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/075342.80165014.5.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net