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astro-ph2002★ 43 cited
An XMM-Newton observation of Ton S180: Constraints on the continuum emission in ultrasoft Seyfert galaxies
S. Vaughan, Th. Boller, A. C. Fabian +3
We present an XMM-Newton observation of the bright, narrow-line, ultrasoft Seyfert 1 galaxy Ton S180. The 0.3-10 keV X-ray spectrum is steep and curved, showing a steep slope above…
astro-ph2002★ 77 cited
1E 1207.4-5209: The puzzling pulsar at the center of the PKS 1209-51/52 supernova remnant
G. G. Pavlov, V. E. Zavlin, D. Sanwal +1
Second Chandra observation of 1E 1207.4-5209, the central source of the supernova remnant PKS 1209-51/52, allowed us to confirm the previously detected period of 424 ms and, assumi…