Searching for Highly Ionized Warm Absorbers in High Luminosity Agn: 4c 74.26

Details Searching for Highly Ionized Warm Absorbers in High Luminosity Agn: 4c 74.26 Searching for Highly Ionized Warm Absorbers in High Luminosity Agn: 4c 74.26

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1269k&link_type=abstract

Chandra Proposal ID #04700418

Physics

Chandra Proposal Id #04700418

Scientific paper

We propose 200ks HETGS observation of the radio-loud quasar 4C 74.26 to search for the presence of highly ionized warm absorbing gas (WA). WAs are apparently rare in high luminosity sources. Here we propose that, in fact, they are very common but so far escaped detection by the low resolution ASCA and XMM detectors since the spectrum of E>1.2 keV WA gas contains mostly narrow absorption lines and no strong bound-free edges. Chandra/HETG is ideal for searching and measuring such lines and 4C 74.26 is a very suitable high-L AGN for testing this hypothesis. Positive line detection will allow measurements of the physical properties and motion of the WA gas. We will also measure the iron-K line and search for an X-ray jet along the known radio jet.

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