PKS1413 + 135 - A BL Lac object in a disc galaxy

Details PKS1413 + 135 - A BL Lac object in a disc galaxy PKS1413 + 135 - A BL Lac object in a disc galaxy

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..742m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 15, 1991, p. 742-747. Research supported by

Astronomy and Astrophysics

Astronomy

37

Bl Lacertae Objects, Disk Galaxies, Radio Sources (Astronomy), Visual Observation, Brightness Distribution, Charge Coupled Devices, Galactic Bulge

Scientific paper

It is shown that the BL Lac core of PKS1413 + 135 is overwhelmingly dominant in the observed K-band but is undetectable in the optical bands. No evidence of strong reddening is found, agreeing with the hypothesis that the very steep infrared core spectrum probably reflects the rather low upper cut-off energy of the underlying electron distribution. This is the first BL Lac object for which there is strong evidence for an underlying disk galaxy and only the second object for which a disk-type host has been reported.

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