Photoelectric intraday observations of BL Lacertae, 3C 66 A, B2 1652 + 39, and 3C 371

Details Photoelectric intraday observations of BL Lacertae, 3C 66 A, B2 1652 + 39, and 3C 371 Photoelectric intraday observations of BL Lacertae, 3C 66 A, B2 1652 + 39, and 3C 371

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220...19m&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Feb. 15, 1978, p. 19-24. Research supported by the Research Corp. and Southern Regiona

Astronomy and Astrophysics

Astrophysics

34

Astronomical Photometry, Diurnal Variations, Optical Properties, Quasars, Astronomical Spectroscopy, Data Reduction, Ubv Spectra, Variability

Scientific paper

A search for optical intraday variability in the sources BL Lac, 3C 66 A, B2 1652 + 39, and 3C 371 has failed to detect significant changes on a time scale ranging from 20 seconds to a few hours. Day-to-day changes in brightness are present in BL Lac, 3C 66 A, and 3C 371. The data suggest that as 3C 66 A and 3C 371 brighten, the U-B color index becomes more negative, while fairly large changes in U-B occur in BL Lac, which may or may not be accompanied by significant changes in V.

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