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arXiv · 0901.2499

The nature of the ASCA/INTEGRAL source AX J183039-1002: a new Compton-thick AGN?

L. Bassani·R. Landi·R. Campana·V. A. McBride·A. J. Dean·A. J. Bird·D. A. Green·P. Ubertini·A. De Rosa
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Abstract

We report on the identification of the X/soft gamma-ray source AX J183039-1002 detected with ASCA and INTEGRAL/IBIS. The source, which has an observed 20-100 keV flux of about 8.6 x 10^-11 erg/cm^2/s, is inside a diffuse radio supernova remnant (SNR) and is spatially coincident with a compact radio source. We analyzed archival Chandra and XMM-Newton observations in order to identify the ASCA/INTEGRAL source. A point-like Chandra X-ray object was found to be positionally coincident with the compact radio source and within the error circle of the ASCA and INTEGRAL sources. Although the association of a compact radio/X-ray source with a radio supernova remnant could be indicative of a pulsar wind nebula (PWN), the XMM-Newton X-ray spectrum is compatible with an absorbed, Seyfert-2 like AGN, since it provides evidence for an iron emission line of about 1 keV equivalent width; furthermore the X-ray source spectrum is similar to that of other Compton thick AGN where the <2 keV data are associated to a warm reflector and the >10 keV one to a cold reflector.

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L. Bassani, R. Landi, R. Campana, V. A. McBride, A. J. Dean, A. J. Bird, D. A. Green, P. Ubertini, A. De Rosa. 2009-01-16. The nature of the ASCA/INTEGRAL source AX J183039-1002: a new Compton-thick AGN?. https://doi.org/10.1111/j.1745-3933.2009.00626.x

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