[ Previous | Next | ADS ]

Two flaring Blazars and Possible Supernova detected by MASTER

ATel #5614; V. Shumkov, D. Denisenko, P. Balanutsa, V. Lipunov, E. Gorbovskoy, N. Tiurina, 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), 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, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 30 Nov 2013; 11:07 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Blazar, Quasar, Supernovae, Transient

Referred to by ATel #: 5679, 5690, 7451

MASTER OT J235725.11-015215.8 - flare of blazar PKS 2354-021

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 23h 57m 25.11s -01d 52m 15.8s on 2013-11-24.62792 UT. The OT unfiltered magnitude is 17.5m (limit 19.2m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-11-02.75843 UT with unfiltered magnitude limit 20.0m.

The OT is identical to the blazar PKS 2354-021 = NVSS J235725-015215 = CGRaBS J2357-0152 (z=0.812). It has an UV counterpart GALEX J235725.1-015215 (FUV=22.27+/-0.09, NUV=21.69+/-0.09). Quiescent magnitudes for SDSS J235725.13-015215.4 are u=20.51 g=19.89 r=19.39 i=19.00 z=18.63. During 9 years of Catalina Sky Survey it was varying between 20.0m and 18.5m with three flares to 18.0m. Current magnitude appears to be the brightest observed for this object.

Multi-wavelength follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/235725.11-015215.8.png

MASTER OT J224412.70+405714.2 - flare of blazar TXS 2241+406 = 1FGL J2243.4+4104

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 22h 44m 12.70s +40d 57m 14.2s on 2013-11-24.72772 UT. The OT unfiltered magnitude is 17.5m (limit 19.5m). The OT is seen in 7 images. There is no minor planet at this place. We have reference image without OT on 2010-11-06.64476 UT with unfiltered magnitude limit 20.1m.

The OT is identical to the blazar TXS 2241+406 = BZB J2244+4057 (z=1.171). There is a gamma-ray source detected by Fermi 1FGL J2243.4+4104 = 2FGL J2244.1+4059 and a variable X-ray source by Swift 1SWXRT J224412.6+40571 with the flux changing by a factor about 3 (from 0.009 to 0.024 cnts/s). This area of sky in Lacerta is not covered by SDSS and GALEX.

The object is showing large variability on the digitized Palomar plates. Comparison of blue DSS plates obtained in 1952 (object not visible), 1989 (faint) and 1992 (bright) is uploaded to http://master.sai.msu.ru/static/OT/J224412+405714-DSS-Blue.jpg (5'x5' FOV). Catalina Sky Survey has observed a flare to 16.7m on 2009 Sep. 23 fading to 17.4m by 2009 Nov. 21.

Multi-wavelength follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/224412.70405714.2.png

MASTER OT J010223.27+203321.2 - possible Supernova

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 01h 02m 23.27s +20d 33m 21.2s on 2013-11-29.52578 UT. The OT unfiltered magnitude is 17.8m (limit 19.0m). The OT is seen in 4 images. There is no minor planet at this place. We have reference image without OT on 2011-12-26.61818 UT with unfiltered magnitude limit 20.0m.

The OT is located 4" west and 12" south of galaxy SDSS J010223.54+203333.1. Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/010223.27203321.2.jpg

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net