1H0419-577: A two-state seyfert galaxy?

M. Guainazzi, A. Comastri, G. Stirpe, W. N. Brandt, A. Parmar, E. M. Puchnarewicz

Research output: Contribution to journalArticle


The preliminary results of the BeppoSAX observation of the radio-quiet AGN 1H0419-577 are presented. Despite its broad line optical spectrum, the intermediate X-ray spectrum (i.e. 2-10 keV) is flatter than typically observed in Seyfert 1s and no iron line is significantly detected. Even more intriguingly, a 1992 ROSAT pointed observation suggests a dramatic (ΔΓ ≃ 1) change in the spectral shape for Ε ≲ 2 keV. Such behavior is briefly discussed in the framework of our current understanding of Comptonization scenarios in the nuclear regions of radio-quiet AGN.

Original languageEnglish (US)
Pages (from-to)533-536
Number of pages4
JournalNuclear Physics B - Proceedings Supplements
Issue number1-3
StatePublished - Jan 1999

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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    Guainazzi, M., Comastri, A., Stirpe, G., Brandt, W. N., Parmar, A., & Puchnarewicz, E. M. (1999). 1H0419-577: A two-state seyfert galaxy? Nuclear Physics B - Proceedings Supplements, 69(1-3), 533-536. https://doi.org/10.1016/S0920-5632(98)00278-3