Imaging and spectroscopy of galaxies in the fields of five BL Laceratae objects

Details Imaging and spectroscopy of galaxies in the fields of five BL Laceratae objects Imaging and spectroscopy of galaxies in the fields of five BL Laceratae objects

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107..494p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 107, no. 2, p. 494-502

Astronomy and Astrophysics

Astronomy

23

Astronomical Photography, Bl Lacertae Objects, Galactic Clusters, Light (Visible Radiation), Red Shift, Visible Spectrum, Astronomical Maps, Astronomical Models, Astronomical Photometry, Astronomical Spectroscopy, Charge Coupled Devices, Data Reduction, Image Processing

Scientific paper

The environments of five BL Lac objects are investigated by imaging the fields of about 8 arcmin around the sources, and by obtaining spectra of some galaxies in the neighborhoods. In three, and possibly four, cases out of five there are one to two galaxies sharing the same redshift as the BL Lac. The environments are similar to Abell clusters of richness class O. Comparison with the environments of F-R I and II radio galaxies is briefly discussed.

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