BVRI photometry of five X-ray selected BL Lacs (Villata+, 2000)

Details BVRI photometry of five X-ray selected BL Lacs (Villata+, 2000) BVRI photometry of five X-ray selected BL Lacs (Villata+, 2000)

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..41440481v&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/144/481. Originally published in: 2000A&AS..144..481V

Astronomy and Astrophysics

Astronomy

Bl Lac Objects, Photometry: Ubvri

Scientific paper

We present optical data obtained with the 1.05 m telescope of the Torino Astronomical Observatory for five X-ray selected BL Lacertae objects. The data are in the Johnson's B, V, and Cousins' R bands. As the observing periods include the pointings of the Satellite per Astronomia X ``Beppo'' (BeppoSAX), our optical information will be comparable with the X-ray observations for a better understanding of the properties of these objects. The present data also provide optical information on sources that have been rarely observed in the optical band. Variability on short time scales (a few days) was found only for 1ES 1959+650. (1 data file).

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