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Two Flaring Quasars detected by MASTER

ATel #6070; V. Shumkov, P. Balanutsa, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), 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), 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, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 14 Apr 2014; 20:51 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Blazar, Quasar, Transient

Referred to by ATel #: 6074, 6096, 6127, 6136

MASTER OT J120854.25+544158.0 - flaring quasar

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 12h 08m 54.25s +54d 41m 58.0s on 2014-04-05.70135 UT. The OT unfiltered magnitude is 16.9m (limit 18.9m). The OT is seen in 10 images. There is no minor planet at this place. We have unfiltered reference image with the object at 20.3m on 2011-04-03.65551 UT (limit 21.8m).

The OT at quiescence is identical to quasar B1206+5458 = 2FGL J1208.8+5441 = FIRST J120854.2+544158 = NVSS J120854+544158 = SDSS J120854.24+544158.3 (g=19.22 r=18.83 i=18.59) with the spectroscopic redshift z=1.342. There is also an UV counterpart GALEX J120854.2+544158 (NUV=21.22+/-0.20) and IR detection WISE J120854.26+544158.2 (W1=13.99 W2=12.85 W3=10.01 W4=7.47).

The object is showing variability from ~20m to 17.5m in Catalina Sky Survey data: CSS J120854.2+544157. The current state appears to be historical brightest for this object in the optical band. Multiwavelength follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/120854.25544158.0.png

MASTER OT J080941.65+534124.3 - flaring quasar

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 08h 09m 41.65s +53d 41m 24.3s on 2014-04-13.50447 UT. The OT unfiltered magnitude is 16.2m (limit 17.1m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2011-11-22.75927 UT with magnitude limit in R filter 18.5m.

The OT at quiescence is identical to quasar CGRaBS J0809+5341 = FIRST J080941.7+534125 = NVSS J080941+534124 = SDSS J080941.73+534125.2 (g=20.93 r=20.38 i=20.03) with the redshift z=2.133. There is also an IR counterpart WISE J080941.72+534125.0 (W1=15.73+/-0.06 W2=14.66+/-0.07 W3=11.50+/-0.15 W4=8.85+/-0.36).

If the z value above is correct, the corresponding absolute magnitude of this object is very high: M=-30.0. Multiwavelength follow up observations are extremely desirable. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/080941.65534124.3.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net