Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...71..125t&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 71, no. 1, Oct. 1987, p. 125-129. Research supported by the
Astronomy and Astrophysics
Astrophysics
25
Astronomical Spectroscopy, Bl Lacertae Objects, Continuous Spectra, Extragalactic Radio Sources, Periodic Variations, Quasars, Galactic Nuclei, Radiant Flux Density
Scientific paper
During the period April - May 1984 the flux densities of 25 extragalactic radio sources were monitored with the Metsähovi Radio Telescope at a frequency of 77 GHz. In BL Lac the authors found a 10 day event where the flux rose by about 40%. Another short term change was observed in OJ 287 whose flux density fell from 6.9 to 3.5 Jy in 28 days during May 1984.
Elo A.-M.
Haarala S.
Laurikainen Eija
Salonen Emppu
Terasranta Harri
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