2 papers
astro-ph.GA2020
An X-ray Luminosity-dependent "Changing-look" Phenomenon in UGC 3223
J. Wang, D. W. Xu, J. Y. Wei
The nature of the rare "Changing-look" (CL) phenomenon in active galactic nuclei (AGNs) is still under debate at current stage. We here present \it Swift/\rm XRT and UVOT follow-up…
astro-ph.HE2018
A Global Photoionization Response to Prompt Emission and Outliers: Different Origin of Long Gamma-ray Bursts?
J. Wang, L. P. Xin, Y. L. Qiu +2
By using the line ratio \ion{C}{4}/\ion{C}{2} as a tracer of ionization ratio of the interstellar medium (ISM) illuminated by a long gamma-ray burst (LGRB…