CCD photometry of 10 BL Lacertae objects

Details CCD photometry of 10 BL Lacertae objects CCD photometry of 10 BL Lacertae objects

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...87..461x&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 87, no. 3, March 1991, p. 461-469. Research supported by NNS

Astronomy and Astrophysics

Astrophysics

44

Astronomical Photometry, Bl Lacertae Objects, Charge Coupled Devices, Active Galactic Nuclei, Astronomical Models, Astronomical Spectroscopy, Variability

Scientific paper

CCD photometric data for 10 BL Lacertae objects are given. The main results are: (1) a short timescale variability exists for OI 090.4 with a characteristic time of 80 minutes and an amplitude of Delta-B = 0.56 mag (+ or - 0.11 mag); (2) an outburst of 0.72 mag (+ or - 0.1 mag) within 40 minutes has again been recorded in the V band for ON + 231; its morphology strongly resembles that of the two previously reported outbursts of 1987 and 1988; and (3) a large amplitude outburst of 0.87 mag (+ or - 0.10 mag) within 96 minutes has been recorded for OJ-131 in the B band.

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