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ATEL # 2374; H. A. Krimm (CRESST/GSFC/USRA), M. Kadler (Remeis-Observatory/ECAP/CRESST/USRA), S. D. Barthelmy (GSFC), W. Baumgartner (CRESST/GSFC/UMBC), J. Cummings (CRESST/GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), C. B. Markwardt (CRESST/GSFC/UMD), D. Palmer (LANL), T. Sakamoto (CRESTT/GSFC/UMBC), G. Skinner (CRESST/GSFC/UMD), M. Stamatikos (OSU/GSFC), J. Tueller (GSFC), T. Ukwatta (GSFC/GWU)
on 8 Jan 2010; 0:13 UT
Password Certification: Hans A. Krimm (Hans.Krimm@nasa.gov)
Subjects: X-ray, Request for Observations, AGN, Transients
The Swift/BAT hard X-ray transient monitor reports the detection of ongoing flaring activity from the broad-line radio galaxy 3C 111. Examination of the data shows the source at a level of 0.0046 ± 0.0022 ct/s/cm2 (20 mCrab) beginning on 2009-Dec-27 (MJD 55192) and rising to a high of 0.0125 ± 0.0015 ct/s/cm2 (55 mCrab) on 2009-Dec-31. The hard X-ray flux of 3C 111 dropped to a level below 7 mCrab for one day on 2010-Jan-2 but rose again to a secondary maximum of 40 mCrab by 2010-Jan-04. As of 2010-Jan-07, the source remains in a high state at 0.0098 ± 0.0020 ct/s/cm2 (40 mCrab).
Swift/BAT Hard X-ray Transient light curve for 3C 111