A Multiwavelength Study of the Extreme AGN J2310-437

A. Prestwich; D.M. Worrall; Harvard-Smithsonian Center for Astrophysics); H.Tananbaum (Harvard-Smithsonian Center for Astrophysics); M. Birkinshaw (Department of Physics; R. A. Remillard (MIT); University of Bristol; W.H. Tucker

arxiv: astro-ph/9808027 · v1 · submitted 1998-08-04 · 🌌 astro-ph

A Multiwavelength Study of the Extreme AGN J2310-437

D.M. Worrall , M. Birkinshaw (Department of Physics , University of Bristol , Harvard-Smithsonian Center for Astrophysics) , R. A. Remillard (MIT) , A. Prestwich , W.H. Tucker , H.Tananbaum (Harvard-Smithsonian Center for Astrophysics) This is my paper

classification 🌌 astro-ph

keywords j2310-437opticalx-raybreakexternalextremeradiospectral

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We present new X-ray, radio, and optical data for the unusual galaxy/cluster system J2310-437. Our results confirm the presence of an active nucleus, and suggest an interpretation as an anomalous BL Lac object of bulk relativistic Doppler factor < 2, with an optically deficient radio-to-X-ray spectrum. The radio, optical, and soft X-ray flux densities could lie along a single power-law function, lacking the curvature typical of BL Lac objects. Compared with other known sources that may have comparable multifrequency spectra, J2310-437 is the most extreme. Its low isotropic optical/UV radiation is consistent with the intensity of external photons governing the electron spectral break through Compton cooling; in this source the external photon density would be too low to produce a spectral break below the X-ray.

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A Multiwavelength Study of the Extreme AGN J2310-437

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