Chandra observations of the nearby low-power radio galaxy NGC 4261

Details Chandra observations of the nearby low-power radio galaxy NGC 4261 Chandra observations of the nearby low-power radio galaxy NGC 4261

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.5111r&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #51.11; Bulletin of the American Astronomical Society, Vol. 33, p.1377

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Using an archival 35 ks Chandra exposure, we studied the X-ray emission from the nearby (z=0.007465) low-power radiogalaxy NGC 4261 (3C 270), famous for containing a massive black hole from HST observations. The Chandra image confirms the presence of an unresolved point source embedded in a soft X-ray diffuse halo, extending up to 20arcsec (4 kpc) from the core, and faint counterparts to the radio jets. We focus on the X-ray spectrum of the core. This shows hard X-ray emission described by an asorbed power law model with photon index Gamma=1.4. No time variability of the hard X-ray flux is observed during the Chandra exposure. We assemble the broad-band energy distribution of the nucleus and discuss possible geometries of the accretion flow. This work is supported by NASA grant NAG5-10073.

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