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astro-ph2007
GRO J1655-40: from ASCA and XMM-Newton Observations
Xiao-Ling Zhang, Shuang Nan Zhang, Gloria Sala +3
We have analysed four ASCA observations (1994--1995, 1996--1997) and three XMM-Newton observations (2005) of this source, in all of which the source is in high/soft state. We model…
astro-ph2003
RX J1856.5-3754: A strange star with solid quark surface?
X. L. Zhang, R. X. Xu, S. N. Zhang
Within the realms of the possibility of solid quark matter, we fitted the 500ks Chandra LETG/HRC data for RX J1856.5-3754 with a phenomenological spectral model, and found that ele…
astro-ph2003
A New Method to Use Chandra Data to Resolve the X-Ray Halos Around Point Sources and Its Application to Cygnus X-1
Y. Yao, S. Nan Zhang, X. L. Zhang +1
With excellent angular resolution, good energy resolution and broad energy band, the Chandra ACIS is the best instrument for studying the X-ray halos around some galactic X-ray poi…