99 citations · 306 across the 15 of their papers we have counts for
15 papers
A spectral-timing study of the inner flow geometry in MAXI J1535--571 with -HXMT and NICER
Wei Yu, Qing-Cui Bu, He-Xin Liu +48
We have performed a spectral-timing analysis on the black hole X-ray binary MAXI J1535--571 during its 2017 outburst, with the aim of exploring the evolution of the inner accretion…
Multiwavelength observations of Swift J0243.6+6124 from 2017 to 2022
Wei Liu, Jingzhi Yan, Pablo Reig +8
We have obtained optical spectroscopy and photometry data during four years after the event. The long-term photometric light-curve and the equivalent widths of the Halpha and He I…
Radio pulsations from a neutron star within the gamma-ray binary LS I +61 303
Shan-Shan Weng, Lei Qian, Bo-Jun Wang +9
LS I +61 303 is one of the rare gamma-ray binaries, emitting most of their luminosity in photons with energies beyond 100 MeV. The 26.5 d orbital period is clearly…
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…
An X-ray periodicity of 1.8 hours in a narrow-line Seyfert 1 galaxy Mrk 766
Peng Zhang, Peng-fei Zhang, Jing-zhi Yan +2
In the narrow-line Seyfert 1 galaxy Mrk 766, a Quasi-Periodic Oscillation (QPO) signal with a period of s is detected in the \emph{XMM-Newton} data collected on 2005 May…
Two transient X-ray Quasi-Periodic Oscillations separated by an intermediate state in 1H 0707-495
Peng-Fei Zhang, Peng Zhang, Neng-Hui Liao +3
In the narrow-line Seyfert 1 galaxy 1H 0707-495, recently a transient quasi-periodic oscillation (QPO) signal with a frequency of Hz has been detected at a…
The Night Sky Spectrum of Xinglong Observatory: Changes from 2004 to 2015
Ji-Cheng Zhang, Zhou Fan, Jing-Zhi Yan +4
We present spectroscopic measurements on the night sky of Xinglong Observatory for a period of 12 years from 2004 to 2015. The spectra were obtained on moonless clear nights using…
Long-term Optical Studies of the Be/X-ray Binary RX J0440.9+4431/LS V+44 17
Jingzhi Yan, Peng Zhang, Wei Liu +1
We present the spectroscopic and photometric observations on the Be/X-ray binary RX~J0440.9+4431 from 2001 to 2014. The short-term and long-term variability of the H line profil…
Long-term Optical Observations of the Be/X-ray Binary X Per
Hui Li, Jingzhi Yan, Jianeng Zhou +1
We present the optical spectroscopic observations of X Per from 1999 to 2013 with the 2.16m telescope at Xinglong Station and the 2.4m telescope at Lijiang station, National Astron…
On the Puzzle of Long and Short Gamma-Ray Bursts
Lang Shao, Fu-Wen Zhang, Zi-Gao Dai +3
In this paper we give a brief review of our recent studies on the long and short gamma-ray bursts (GRBs) detected Swift, in an effort to understand the puzzle of classifying GRBs.…
Multi-wavelength study of the Be/X-ray binary MXB 0656-072
Jingzhi Yan, Juan Antonio Zurita Heras, Sylvain Chaty +2
We present and analyze the optical photometric and spectroscopic data of the Be/X-ray binary MXB 0656-072 from 2006 to 2009. A 101.2-day orbital period is found, for the first time…
Revisiting the Long/Soft-Short/Hard Classification of Gamma-Ray Bursts in the Fermi Era
Fu-Wen Zhang, Lang Shao, Jing-Zhi Yan +1
We perform a statistical analysis of the temporal and spectral properties of the latest Fermi gamma-ray bursts (GRBs) to revisit the classification of GRBs. We find that the bimoda…
Discrete Mass Ejections from the Be/X-ray Binary A0535+26/HD245770
Jingzhi Yan, Hui Li, Qingzhong Liu
We present the long-term optical spectroscopic observations on the Be/X-ray binary A0535+26 from 1992 to 2010. Combining with the public V-band photometric data, we find that each…
Optical Spectroscopic Observations of Cyg X-1=HDE 226868
Jingzhi Yan, Qingzhong Liu, Petr Hadrava
We present the results of the spectroscopic observations of HDE 226868, the optical counterpart to the black hole X-ray binary Cyg X-1, from 2001 to 2006. We analyze the variabilit…
Optical Spectroscopic Observations of CI Camelopardalis
Jingzhi Yan, Qingzhong Liu, Hengrong Hang
We present the results of optical spectroscopic observations of CI Cam. Double-peaked profiles were simultaneously observed for the first time in the hydrogen Balmer, He {\small I}…