THE COMPLEX X-RAY SPECTRUM OF THE SEFYERT 1.5 SOURCE NGC 6860

Journal Article · Tue Aug 10 04:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/719/1/737· OSTI ID:21454989

Winter, Lisa M ^[1]; Mushotzky, Richard ^[2]

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1. Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO (United States)
2. Astronomy Department, University of Maryland, College Park, MD (United States)

The X-ray spectrum of the Seyfert 1.5 source NGC 6860 is among the most complex of the sources detected in the Swift Burst Alert Telescope all-sky survey. A short XMM-Newton follow-up observation of the source revealed a flat spectrum both above and below 2 keV. To uncover the complexity of the source, in this paper we analyze both a 40 ks Suzaku and a 100 ks XMM-Newton observation of NGC 6860. While the spectral state of the source changed between the newer observations presented here and the earlier short XMM-Newton spectrum-showing a higher flux and a steeper power-law component-the spectrum of NGC 6860 is still complex with clearly detected warm absorption signatures. We find that a two-component warm ionized absorber is present in the soft spectrum, with column densities of about 10{sup 20} and 10{sup 21} cm{sup -2}, ionization parameters of {xi} = 180 and 45 erg s{sup -1}, and outflow velocities for each component in the range of {approx}0-300 km s{sup -1}. Additionally, in the hard spectrum we find a broad ({approx}11, 000 km s{sup -1}) Fe K{alpha} emission line, redshifted by {approx}2800 km s{sup -1}.

• OSTI ID: 21454989
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 719; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION
EMISSION
GALAXIES
SEYFERT GALAXIES
SORPTION
SPECTRA
TELESCOPES
X-RAY SPECTRA