A study of Einstein Observatory fields with a CCD camera

Details A study of Einstein Observatory fields with a CCD camera A study of Einstein Observatory fields with a CCD camera

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..121s&link_type=abstract

Astronomical Journal, vol. 85, Feb. 1980, p. 121-130. Research supported by the Smithsonian Research Foundation.

Astronomy and Astrophysics

Astronomy

6

Astronomical Photometry, Charge Coupled Devices, X Ray Sources, Bl Lacertae Objects, Infrared Astronomy, Quasars, Red Shift, Visual Photometry

Scientific paper

Photometry at R and I wavelengths obtained with a 100 x 100 pixel CCD camera for fields containing X-ray sources discovered by the Einstein X-ray Observatory is presented. One field contains an anonymous distant cluster of galaxies for which an approximate redshift is reported. In two of the three Draco fields, faint sources are found having stellar appearance but anomalous colors that may be extremely red quasars or BL Lac objects.

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