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- W814006747 abstract "The broad-band X-ray continuum of NAB 0205424 is well constrained due to the excellent photon statistics obtained (about 97,700 counts), and its impressive soft X-ray excess is clearly apparent. The hard X-ray power law has become notably steeper than when NAB 0205424 was observed with ASCA, attesting to the presence of significant X-ray spectral variability. A strong and broad emission feature is detected from about 5 to 6.4 keV, and we have modeled this as a relativistic line emitted close to the black hole from a narrow annulus of the accretion disk. Furthermore, a strong X-ray flare is detected with a hard X-ray spectrum; this flare may be responsible for illuminating the inner line-emitting part of the accretion disk. The combined observational results can be broadly interpreted in terms of the thundercloud model proposed by Merloni & Fabian (2001)." @default.
- W814006747 created "2016-06-24" @default.
- W814006747 creator A5080556555 @default.
- W814006747 date "2004-01-01" @default.
- W814006747 modified "2023-09-26" @default.
- W814006747 title "An XMM-Newton Study of the Bright Ultrasoft Narrow-Line Quasar NAB 0205+024" @default.
- W814006747 hasPublicationYear "2004" @default.
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