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Title:
BBXRT and GINGA observations of the Seyfert 1 galaxy Markarian 335
Authors:
Turner, T. J.; Nandra, K.; Zdziarski, A. A.; Jahoda, K.; Madejski, G. M.; Marshall, F.; Mushotzky, R. F.; Petre, R.; Pounds, K. A.; Smale, A. P.; Serlemitsos, P.; Weaver, K.
Affiliation:
AA(NASA, Goddard Space Flight Center; Universities Space Research Association, Greenbelt, MD), AB(Leicester Univ; Cambridge Univ. Inst. of Astronomy, United Kingdom), AC(NASA, Goddard Space Flight Center, Greenbelt, MD; Polish Academy of Sciences, Astronomical Center, Warsaw, Poland), AD(NASA, Goddard Space Flight Center, Greenbelt, MD), AE(NASA, Goddard Space Flight Center; Universities Space Research Association, Greenbelt, MD), AF(NASA, Goddard Space Flight Center, Greenbelt, MD), AG(NASA, Goddard Space Flight Center, Greenbelt, MD), AH(NASA, Goddard Space Flight Center, Greenbelt, MD), AI(Leicester Univ., United Kingdom), AJ(NASA, Goddard Space Flight Center; Universities Space Research Association, Greenbelt, MD)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 2, p. 556-563. (ApJ Homepage)
Publication Date:
04/1993
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
GINGA SATELLITE, MARKARIAN GALAXIES, SEYFERT GALAXIES, SPACEBORNE ASTRONOMY, X RAY ASTRONOMY, ABSORPTION SPECTRA, ASTRONOMICAL MODELS, ASTRONOMICAL SPECTROSCOPY, GALACTIC NUCLEI, VARIABILITY, X RAY SPECTRA
DOI:
10.1086/172537
Bibliographic Code:
1993ApJ...407..556T

Abstract

We present new X-ray observations of Mrk 335 in the 0.4-10 keV band using BBXRT and in the 2-20 keV band with Ginga. The BBXRT data show a break to a softer spectrum below about 1 keV. The Ginga data show evidence for variability in absorption, uncorrelated with flux changes of the continuum source. The inconsistency between the opacity observed at the iron K edge and at softer X-ray energies implies that the absorber has an ionization state about FeXV. We suggest that the nuclear emission can be explained by a self-consistent pair cascade model as developed by Zdziarski et al. (1990) and Zdziarski and Coppi (1991), where the compactness parameter inferred from the spectral fits to both data sets is in good agreement with the value calculated from the ratio of observed X-ray luminosity and variability time scale.

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