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X-ray variability in BL Lac objects

โœ Scribed by F. Makino

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
117 KB
Volume
320
Category
Article
ISSN
0004-6337

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โœฆ Synopsis

X-ray variability in high energy peaked BL Lac objects (HBLs) is characterized by a correlation between flux and index and by soft lag. It is shown that these properties can quantitatively be expressed by Fermi acceleration and synchrotron cooling model and physical parameters in accelerating and decelerating regions are derived by fitting the observed light curves with the model.

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On the difference between the X-ray sele
On the difference between the X-ray selected and the radio selected BL Lac objects in the near infrared
โœ P.S. Chen; H.G. Shan; Y.F. Gao ๐Ÿ“‚ Article ๐Ÿ“… 2006 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 215 KB

By using results from the 2MASS observation, the differences between the X-ray selected BL Lac objects (XBLs) and the radio selected ones (RBLs) in the near infrared are discussed in this paper. It is found that, statistically, the RBLs have redder near infrared colors and steeper spectral indices i