43 citations · 145 across the 7 of their papers we have counts for
7 papers
The optical spectral features of 27 Fermi blazars
Bing-Kai Zhang, Wei-Feng Tang, Chun-Xiao Wang +4
A spectral variation accompanied with flux variability is a commonly-observed phenomenon for blazars. In order to further investigate the optical spectral feature of blazars, we ha…
Optical Spectral Variations of a Large Sample of Fermi Blazars
Zhang Bing-Kai, Zhao Xiao-Yun, Wu Qi
We have investigated the optical spectral behavior of a large sample of Fermi blazars (40 FSRQs and 13 BL Lacs), and found two new universal optical spectral behaviors. In the low…
Long-term multi-wavelength variations of Fermi blazar 3C 279
Bing-Kai Zhang, Min Jin, Xiao-Yun Zhao +2
The long-term optical, X-ray and -ray data of blazar 3C 279 have been compiled from -XRT, PCA, -LAT, SMARTS and literature. The source exhibits strong varia…
Long-term optical-infrared color variability of blazars
Bing-Kai Zhang, Xiao-Shan Zhou, Xiao-Yun Zhao +1
The long-term optical and infrared color variability of blazars has been investigated with the SMARTS monitoring data. The sample in this study consists of 49 flat spectrum radio q…
Optical quasi-periodic oscillation and color behavior of blazar PKS 2155-304
Bing-Kai Zhang, Xiao-Yun Zhao, Chun-Xiao Wang +1
PKS 2155-304 is a well studied BL Lac object in the southern sky. The historical optical data during different period have been collected and compiled. Light curves with a time spa…
Energy Spectrum of Cosmic Protons and Helium Nuclei by a Hybrid Measurement at 4300 m a.s.l
B. Bartoli, P. Bernardini, X. J. Bi +97
The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured, below the so-called "knee", by using a hybrid experiment with a wide field-of-view Cherenkov telescope a…
The Correlated Multi-color Optical Variations of BL Lac Object S5 0716+714
Bingkai Zhang, Benzhong Dai, Li Zhang +2
S5 0716+714 is a well-studied BL Lac object in the sky. Verifying the existence of correlations among the flux variations in different bands serves as an important tool to investig…