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Renewed Activity of Quasar S5 1217+71 detected by MASTER

ATel #6023; P. Balanutsa, V. Lipunov, D. Denisenko, 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, V. Shumkov, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 28 Mar 2014; 21:22 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Quasar, Transient

Referred to by ATel #: 6073

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 12h 20m 03.68s +71d 05m 31.1s on 2014-03-27.72841 UT. The OT unfiltered magnitude is 18.0m (limit 19.7m). The OT is seen in 6 images. There is no minor planet at this place. We have reference image without OT on 2012-02-18.71240 UT with unfiltered magnitude limit 20.1m.

The OT is identical to flat spectrum radio quasar S5 1217+71 = TXS 1217+713 = 2FGL J1219.2+7107. It was detected in bright outburst a year ago, in Mar. 2013, by Fermi LAT (Ciprini et al., ATel #4885) and reached unfiltered magnitude 15.8 in the follow up MASTER observations (ATel #4889). Since then the object has faded below the detection limit by MASTER with the latest non-detection on 2014-03-03.762 UT (fainter than 18.4m). Current observations by MASTER suggest the possible onset of the new activity episode. Multiwavelength observations are required. MASTER-Tunka Mar. 27 detection and reference images are uploaded to http://observ.pereplet.ru/images/122003.64710532.0.jpg

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net