MASTER Detection of New Flare of QSO NVSS J075043+790917 During the Fermi GRB Error Box Inspection
ATel #6745; V. Shumkov, D. Denisenko, V. Lipunov, E. Gorbovskoy, M. Pruzhinskaya, N. Tiurina, P. Balanutsa, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, E. Popova (Lomonosov Moscow State University, SAI), 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), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk Solar Station of Pulkovo Observatory), V. Yurkov, A. Gabovich, Y. Sergienko, E. Sinyakov (Blagoveshchensk Educational University), S. Shurpakov (MASTER team member)
on 24 Nov 2014; 17:41 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Radio, Optical, Gamma Ray, Gamma-Ray Burst, Quasar, Transient
MASTER OT J075043.33+790917.1 - new flare of QSO NVSS J075043+790917 = MASTER OT J075042.60+790918.2
During the inspection of the error box of Fermi GRB (trigger number 438503903) MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 07h 50m 43.33s +79d 09m 17.1s on 2014-11-24.62164 UT. The OT unfiltered magnitude is 17.5m (limit 18.4m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2010-11-13.70064 UT with unfiltered magnitude limit 21.2m.
The OT is a new flare of quasar NVSS J075043+790917 that was previously detected by MASTER-Amur on 2013-04-26.694 UT as MASTER OT J075042.60+790918.2 (see ATel #5044, S. Shurpakov et al.). The object is marginally visible on the Blue Palomar plate with jmag=22.31 in GSC 2.3.2. There is an infrared counterpart AllWISE J075043.29+790917.1 (W1=14.05+/-0.03 W2=13.01+/-0.03 W3=9.53+/-0.03 W4=7.20+/-0.09). This area of sky is not covered by SDSS and CRTS. Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J075043+790917-BRIR.jpg (10'x10' FOV).
We note that in our previous observations of this field by MASTER-Tunka on 2014-10-26.644 UT (by the coincidence, also during Fermi error box inspection for trigger number 436028617) the object was marginally detected at ~18.5m. Multi-wavelength follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/075043.33790917.1.png
List of Optical Transients discovered by MASTER
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