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The flux variability of markarian 501 in very high energy gamma rays
(IOP Publishing, 1999-06-20)
The BL Lacertae object Markarian 501 was identified as a source of gamma-ray emission at the Whipple Observatory in 1995 March. Here we present a flux variability analysis on several timescales of the 233 hr data set ...
Simultaneous x-ray and t[clc]e[/clc]v observations of a rapid flare from markarian 421
(IOP Publishing, 1999-12-01)
Mrk 421 was observed for about 2 days with BeppoSAX in 1998 April as part of a worldwide multiwavelength campaign. A large, well-defined flare was observed in X-rays. The same flare was observed simultaneously at TeV ...