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Impact of Plasma Instability on Constraint of the Intergalactic Magnetic Field
Dahai Yan, Jianeng Zhou, Pengfei Zhang +2
A relativistic electron-positron pair beam can be produced in the interaction of TeV photons from a blazar with the extragalactic background light (EBL). The relativistic …
A gamma-ray periodic modulation in Globular Cluster 47 Tucanae
Peng-Fei Zhang, Jia-Neng Zhou, Da-Hai Yan +4
The Globular Cluster 47 Tucanae was firstly detected in gamma-rays by the Large Area Telescope (LAT) onboard the \emph{Fermi} Gamma-ray Space Telescope, and the gamma-ray emission…
Statistical analysis on XMM-Newton X-ray flares of Mrk 421: distributions of peak flux and flaring time duration
Dahai Yan, Shenbang Yang, Pengfei Zhang +3
The energy dissipation mechanism in blazar jet is unknown. Blazar's flares could provide insights on this problem. Here we report statistical results of XMM-Newton X-ray flares of…
Testing relativistic boost as the cause of gamma-ray quasi-periodic oscillation in a blazar
Dahai Yan, Jianeng Zhou, Pengfei Zhang +2
The mechanism for producing gamma-ray quasi-periodic oscillation (QPO) in blazar is unknown. One possibility is the geometric model, in which without the need for intrinsic quasi-p…
Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011
Xu-Liang Fan, Shao-Kun Li, Neng-Hui Liao +8
We present our photometric monitoring of a flat spectrum radio quasar (FSRQ) 3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the optical color of 3C 454.3 shows ob…