Publications (15)
Multi-color optical monitoring of the quasar 3C 273 from 2005 to 2016
Dingrong Xiong, Jinming Bai, Haojing Zhang +4
We have monitored the quasar 3C 273 in optical , and bands from 2005 to 2016. Intraday variability (IDV) is detected on seven nights. The variability amplitudes for most…
Multiwavelength Variability Analysis of the Blazar PKS 0727-11: A 168 Days Quasi-periodic Oscillation in Gamma-ray
Yuncai Shen, Tingfeng Yi, Vinit Dhiman +2
We performed variability analysis of the multiwavelength light curves for the flat-spectrum radio quasar PKS 0727-11. Using the generalized Lomb-Scargle periodogram, we identified…
Comparing Optical Variability of Type 1 and Type 2 AGN from the BAT 9-Month Sample using ASAS-SN and TESS Surveys
Natalie Kovacevic, Xinyu Dai, Heechan Yuk +6
We present an optical variability analysis and comparison of the samples of Seyfert 1 and 2 galaxies, selected from the \textit{Swift} 9-month BAT catalog, using the light curves f…
Quasi-periodic behaviour in the -ray light curve of the blazar PKS 0405-385
Yunlu Gong, Liancheng Zhou, Min Yuan +3
We analyze the quasi-periodic oscillation (QPO) of the historical light curve of FSRQs PKS 0405-385 detected by the Fermi LAT from August 2008 to November 2021. To identify and det…
Possible quasi-periodic optical oscillations of ZTF blazars
Na Wang, Guowei Ren, Shun Zhang +3
Based on the Zwicky Transient Facility (ZTF), we selected 10 blazars as our sample sources. Among these, we found four blazars (J 0923.5+4125, J 1221.3+3010, J 1503.5+4759, and J 1…
A 31.3 day Transient Quasiperiodic Oscillation in Gamma-ray Emission from Blazar S5 0716+714
Junping Chen, Tingfeng Yi, Yunlu Gong +4
We systematically search for quasiperiodic oscillatory (QPO) signals on the month timescale among the 1525 sources given in the Fermi Large Area Telescope Light Curve Repository. W…