Other
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...400l..17s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 400, no. 1, p. L17-L20.
Other
41
Bl Lacertae Objects, Quasars, Spiral Galaxies, Astronomical Spectroscopy, Galactic Nuclei, Infrared Spectroscopy, Interstellar Extinction, Point Sources, X Ray Spectra
Scientific paper
New observations of the very red quasar or BL Lac object PKS 1413 + 135 are presented. Optical imaging and spectroscopy confirm the claim that the host galaxy to this BL Lac is a spiral, and H-band imaging shows the point source centered in the galaxy to within 0.1 arcsec. A reanalysis of Einstein X-ray data finds evidence for an extremely large column density in this source. While the astrometric evidence supports the hypothesis that PKS 1413 + 135 is the very unusual case of a BL Lac object in a spiral galaxy, a highly extincted nuclear source would produce other observable features in this galaxy that are not observed: narrow emission-line region and large thermal IR flux. Their absence argues for this source being background to the spiral.
Elston Richard
Jannuzi Buell Tomasson
Stocke John T.
Wang Qingde
Wurtz Ron
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