PKS 0537-441 - A gravitationally lensed blazar?

Details PKS 0537-441 - A gravitationally lensed blazar? PKS 0537-441 - A gravitationally lensed blazar?

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...206l..30s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 206, no. 2, Nov. 1988, p. L30-L33.

Astronomy and Astrophysics

Astrophysics

47

Bl Lacertae Objects, Blazars, Disk Galaxies, Gravitational Lenses, Quasars, Absorption Spectra, Astronomical Spectroscopy, Charge Coupled Devices, Hubble Constant, Red Shift

Scientific paper

Deep direct optical imaging data and spectroscopic observations of the southern blazar PKS 0537-441 (z = 0.894) and a neighboring galaxy are reported. The blazar has an extended, spatially resolved appearance. Image decomposition reveals a foreground disk galaxy seen nearly face-on which lies along the line of sight to the blazar. This foreground galaxy is mainly responsible for the extended image of PKS 0537-441, and its morphology is similar to that of a neighboring disk galaxy 11 arcsec to the east and slightly south of the blazar with a redshift of z = 0.186. Both objects presumably form a close pair at the same redshift. It is argued that the observed properties of the blazar are influenced by gravitational lensing in the foreground galaxy.

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