Daily observations of compact radio sources in 1983

Details Daily observations of compact radio sources in 1983 Daily observations of compact radio sources in 1983

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..231w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, Feb. 1986, p. 231-254.

Astronomy and Astrophysics

Astronomy

10

Bl Lacertae Objects, Radio Sources (Astronomy), Diurnal Variations, Light Curve, Radiant Flux Density

Scientific paper

Flux densities are reported at 3.7 and 11.1 cm for 36 compact variable radio sources that were monitored on a daily basis during 1983 with the Green Bank interferometer. The majority of the sources, with the exception of SS 433, 0235 + 164, BL Lac, 3C 446, and 3C 454.3, did not vary by more than 15 percent. Previous results for BL Lac are also included to show its daily variability over a period of almost 5 yr. Comparison of the light curves for BL Lac show a delay in the development of outbursts at 11.1 cm with respect to 3.7 cm of approximately 15 days during 1981-1984. However, during a particularly active period in 1980, the delay appeared to be only 2 days. Possible implications relevant to models of the outbursts in BL Lac are discussed. Flux-density variations during 1980-1984 appear similar to activity between 1970 and 1976 and may indicate a pattern in the outbursts of BL Lac.

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