AAS 196th Meeting, June 2000
Session 50. Active Galaxies
Display, Thursday, June 8, 2000, 9:20am-4:00pm, Empire Hall South

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[50.12] Compton-thick Tori in two Seyferts: ESO 138-G1 & Tololo 0109-383

M. J. Collinge, W. N. Brandt (Penn State U.)

We present analyses of the ASCA X-ray spectra of two Seyfert galaxies, ESO 138-G1 (a Seyfert 2) and Tololo 0109-383. The classification of Tololo 0109-383 has been somewhat uncertain, but we consider it to be a Seyfert 2 as well. In both spectra we observe strong iron K\alpha lines (equivalent widths greater than 1 keV), and chi-squared spectral fitting indicates intrinsic absorbing columns on the order of 2\times 1023 cm-2. However, the large iron line equivalent widths suggest that both galaxies' nuclear spectra undergo significantly heavier absorption (column densities greater than 1024 cm-2), or in other words that the galaxies are both `Compton-thick' Seyfert 2s. We use the hard X-ray/[O III] \lambda5007 flux correlation for Seyferts and data from the literature to provide additional support for this hypothesis.

The author(s) of this abstract have provided an email address for comments about the abstract: mjc278@psu.edu

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