Optical Monitoring of BL Lacertae Object OJ 287: A 40 Day Period?
نویسندگان
چکیده
منابع مشابه
Observations of the BL Lacertae Object OJ 287 in 1997 April and November
X-ray properties of the BL Lacertae object OJ 287, observed with ASCA on 1997 April 26 and November 17, are reported. The 0.5 – 10 keV flux was lower than those obtained in previous X-ray observations, and no evidence of intensity variations was found during each observation. The obtained flux densities at 1 keV, 0.22 ∼ 0.26 μJy, exceed the extrapolations from lower frequency synchrotron contin...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2006
ISSN: 0004-6256,1538-3881
DOI: 10.1086/506197