Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..143..357k&link_type=abstract
Astronomy and Astrophysics Supplement, v.143, p.357-368
Astronomy and Astrophysics
Astrophysics
38
Galaxies: Active, Bl Lacertae Objects: General, Quasars: General
Scientific paper
We present results of optical monitoring of quasars and blazars obtained at Tuorla Observatory between September 1995 and May 1997. The aim of our monitoring is to provide well sampled optical light curves for quasar and blazar studies. During the observing period the V-band brightness of S2 0109+224, 3C 66A, and ON 231 (W Comae) reached some of the brightest values ever measured for these objects. A strong outburst was observed in Mrk 421 and the large outburst, which was predicted earlier, in OJ 287 was confirmed. CTA 102 had over one magnitude outburst which happened in a timescale of a few days. For OI 090.4 we measured one of the faintest V-band brightness values ever. Tables 2 and 3 are only available in electronic form at http://www.edpsciences.org
Hanski Mikko
Heinämäki Pekka
Katajainen Seppo
Kotoneva Eira
Lahteenmaki Anne
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