A Strong Optical Flare from Blazar S4 1849+67 Detected by ASAS-SN

ATel #7205; K. Z. Stanek, T. W.-S. Holoien, C. S. Kochanek, A. B. Danilet, G. Simonian, U. Basu, N. Goss, J. F. Beacom, T. A. Thompson (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), J. Brimacombe (Coral Towers Observatory), Subo Dong (KIAA-PKU), E. Falco (CfA), P. R. Wozniak (LANL), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 11 Mar 2015; 18:16 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

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Flaring blazar S4 1849+67 (e.g., ATel #3478) is in a field regularly observed by ASAS-SN quadruple "Brutus" telescope. Two images obtained on UT 2015-03-10.60 reveal a strong (delta V~2 mag) V-band flare of that object, see this figure for last 30 days of ASAS-SN V-band photometry. In particular, the last four ASAS-SN epochs had the following V-band photometry:

  
 UT Date         V      
2015-02-15.64  16.40 
2015-02-24.58  16.80 
2015-03-02.58  >16.20 
2015-03-10.60  15.15 

We thank LCOGT and its staff for their continued support of ASAS-SN. ASAS-SN is supported in part by Mt. Cuba Astronomical Foundation. For more information about the ASAS-SN project, see the ASAS-SN Homepage.