24 citations · 34 across the 2 of their papers we have counts for
2 papers
astro-ph2006★ 10 cited
Hardness Ratio Estimation in Low Counting X-ray Photometry
Y. K. Jin, S. N. Zhang, J. F. Wu
Hardness ratios are commonly used in X-ray photometry to indicate spectral properties roughly. It is usually defined as the ratio of counts in two different wavebands. This definit…
astro-ph2006★ 24 cited
Multiwavelength Observations of the BL Lacertae Object PKS 2155-304 with XMM-Newton
Y. H. Zhang, J. M. Bai, S. N. Zhang +3
The optical-UV and X-ray instruments on-board XMM-Ndewton provide an excellent opportunity to perform simultaneous observations of violently variable objects over a broad wavelengt…