Spectroscopy of six X-ray-selected BL Lacertae candidates

Details Spectroscopy of six X-ray-selected BL Lacertae candidates Spectroscopy of six X-ray-selected BL Lacertae candidates

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1129m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Nov. 1986, p. 1129-1132.

Astronomy and Astrophysics

Astronomy

6

Bl Lacertae Objects, Quasars, X Ray Stars, Galactic Nuclei, Line Spectra

Scientific paper

Results of a continuing program aimed at extending the small list of X-ray-selected BL Lac objects are reported. High-quality spectra have been obtained of six faint blue objects that lie within the positional error boxes of X-ray sources discovered serendipitously by the Einstein Observatory. Three of the objects are found to be previously uncataloged low-red-shift quasi-stellar objects, including one formerly suggested as BL Lac candidate. Two are faint galactic stars, while the final object has a featureless spectrum, and thus remains a candidate. Although X-ray selection may ultimately be an effective means of discovering faint BL Lac objects, such sources are evidently rare at the X-ray flux levels attainable by the Einstein Observatory.

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