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Short-Term X-ray Variability during Different Activity Phases of Blazars S5 0716+714 and PKS 2155-304

Pal, Main; Kushwaha, Pankaj

We explored the statistical properties of short-term X-ray variability using long-exposure XMM-Newton data during high X-ray variability phases of blazars S5 0716+714 and PKS 2155-304. In general, the hardness ratio shows correlated variations with the source flux state (count rate), but in a few cases, mainly the bright phases, the trend is compl…

X-ray Flux and Spectral Variability of Blazar H 2356-309

Gaur, Haritma; Wani, Kiran A.

We present the results of timing and spectral analysis of the blazar H 2356-309 using XMM-Newton observations. This blazar is observed during 13 June 2005–24 December 2013 in total nine observations. Five of the observations show moderate flux variability with amplitude 1.7–2.2%. We search for the intra-day variability timescales in these five lig…