ASCA/ROSAT observations of PKS 2316-423: Spectral properties of a low luminosity intermediate-type BL lac object

Details ASCA/ROSAT observations of PKS 2316-423: Spectral properties of a low luminosity intermediate-type BL lac object ASCA/ROSAT observations of PKS 2316-423: Spectral properties of a low luminosity intermediate-type BL lac object

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599.1015x&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

Active And Peculiar Galaxies And Related Systems, X-Ray Sources, X-Ray Bursts, Magnitudes And Colors, Luminosities

Scientific paper

We present the analysis of archival data from ROSAT and ASCA of a serendipitous source PKS 2316-423. According to its featureless non-thermal radio/optical continuum, the object has been assumed as a BL Lac candidate in the literature. PKS 2316-423 was evident variable over the multiple X-ray observations. Specially, a variable high-energy tail of the synchrotron radiation is revealed. X-ray spectral analysis provided further evidence of its synchrotron-nature broad-band spectrum with steep and down-curved shape in the range of 0.1-10 keV, this is general signature of a HBL. The spectral energy distribution (SED) through radio-to-X-ray yields the synchrotron radiation peak at frequency νp=7.3×1015 Hz, with integrated luminosity of Lsyn=2.1×1044 ergs s-1, this suggest that PKS 2316-423 is a low luminosity BL Lac object with high synchrotron peak frequency. Further SED analysis suggest that PKS 2316-423 is a very low luminosity ``intermediate'' or high energy peaked BL Lac object. Given the unusual low luminosity, the further studies of PKS 2316-423 might give clues on the evolution properties of BL Lacs. .

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