Optical brightness of 3 ROSAT Seyfert galaxies (Greiner+, 1996)

Details Optical brightness of 3 ROSAT Seyfert galaxies (Greiner+, 1996) Optical brightness of 3 ROSAT Seyfert galaxies (Greiner+, 1996)

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..33100384g&link_type=abstract

VizieR On-line Data Catalog: J/A+A/310/384. Originally published in: 1996A&A...310..384G

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Active Gal. Nuclei, Galaxies: Optical, Galaxies: Photometry

Scientific paper

The printed version of this paper describes the X-ray and optical properties of four new active galaxies discovered in the ROSAT All-Sky Survey. While one object (RX J1257.5+2412) is identified as a BL Lac object, the other three (RX J1239.3+2431, RX J1225.7+2055, and RX J1250.2+1923) are narrow line Seyfert 1 galaxies. Three of these four objects are bright enough to be studied on archival photographic plates of Sonneberg Observatory. The present list contains the individual brightness measurements of these objects all of which turned out to be variable on timescales of weeks to years. Some lightcurves (long-term as well as short-term) are given in the printed version. (1 data file).

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