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Further Brightening of Quasar S5 1217+71 observed by MASTER

ATel #6073; S. Shurpakov, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, 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), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of Pulkovo Observatory), 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 16 Apr 2014; 15:14 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Quasar, Transient

Following the possible onset of a new activity episode on 2014 Mar. 27 reported in ATel #6023, the radio quasar S5 1217+71 = 2FGL J1219.2+7107 (z=0.451) was observed in survey mode by MASTER-Kislovodsk on Apr. 15 and by MASTER-Amur on Apr. 16. The object has shown the further brightening by ~1.5m over the last 20 days, see the Table below:

Obs. date, UT   Mag.  Observatory 
2014-03-27.728  18.0  MASTER-Tunka 
2014-04-15.840  16.6  MASTER-Kislovodsk  
2014-04-16.551  16.3  MASTER-Amur 
Since this area of sky is not covered by SDSS, we provide color-combined DSS finder chart for the convenience of optical observers: http://master.sai.msu.ru/static/OT/J122003+710531-BRIR5x5.jpg (2x zoom). The object has the following IDs, coordinates and magnitudes in the major catalogues: USNO-B1.0 1610-0094940 (12 20 03.57 +71 05 31.5 B1=19.85 B2=20.08 R2=19.66) = GALEX J122003.6+710531 (NUV=20.68+/-0.22) = 2MASS J12200362+7105312 (J=16.44+/-0.13 H=15.68+/-0.16 K=15.05+/-0.15).

The object is currently approaching its highest optical brightness level (15.8m) observed after the March, 2013 flare in gamma-rays (ATel #4885). Multiwavelength follow up observations are strongly encouraged. MASTER-Amur Apr. 16 detection and reference images are uploaded to http://master.sai.msu.ru/static/OT/122003.76710531.0.png

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