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20022008
most citedNew period-luminosity and period-color relations of classical Cepheids: III. Cepheids in SMC

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astro-ph2002

1ES 1927+654: Persistent and rapid X-ray variability in an AGN with low intrinsic neutral X-ray absorption and narrow optical emission lines

Th. Boller, W. Voges, M. Dennefeld +7

We present X-ray and optical observations of the X-ray bright AGN 1ES 1927+654. The X-ray observations obtained with ROSAT and Chandra reveal persistent, rapid and large scale vari…