Identification of XX Ceti and US 3215 as extragalactic objects

Details Identification of XX Ceti and US 3215 as extragalactic objects Identification of XX Ceti and US 3215 as extragalactic objects

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..383h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 686, p. 383-386.

Astronomy and Astrophysics

Astronomy

6

Quasars, Seyfert Galaxies, Astronomical Photometry, Astronomical Spectroscopy, Charge Coupled Devices, Emission Spectra, Light Curve, Red Shift

Scientific paper

XX Ceti and US 3215 were selected on the basis of their blue and ultraviolet color excess, and have been identified as optical variables. They were previously thought to be cataclysmic variable stars, but recently acquired spectra show that they are extragalactic. XX Cet is a quasar with a redshift of 0.736, and US 3215 is a Seyfert 1 galaxy with a redshift of 0.193. Photometric data indicating the presence of microvariability are presented and the nature of these two objects is discussed.

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