Optical Activity Follow Up MASTER Detection of the Blazar B2 2308+34

ATel #5487; D. Denisenko, E. Grigoreva, E. Gorbovskoy, V. Lipunov, N. Tiurina, V. Yecheistov, P. Balanutsa, V. Kornilov, V. Chazov, A. Kuznetsov, V. Vladimirov, D. Cheryasov, M. Kornilov, B. Safonov, D. Gareyeva (Moscow State University, SAI), 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, A. Frolova (Irkutsk State 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), M. I. Panasyuk, S. I. Svertilov, A. F. Iyudin, L. A. Kuzmichev (SINP MSU)
on 19 Oct 2013; 07:32 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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Follow-up Fermi LAT Detection of Renewed Activity from B2 2308+34 (S.Buson, Atel #5477) MASTER-Tunka auto-detection system discovered strong brightening source at (RA, Dec) = 23h 11m 05.30s +34d 25m 11.3s on 2013-10-18.58796 UT. The B2 2308+34 unfiltered magnitude is 15.4 (limit 17.4m). One magnitude more than historical maximum during Catalina observations (http://master.sai.msu.ru/static/OT/J231105+342511-CRTS_LC.gif).

The OT is seen in 20 images.

We have reference image without OT on 2011-08-01.75066 UT with unfiltered magnitude limit 19.9m.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/231105.30342511.3.png

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