Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...345..148f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 1, 1989, p. 148-152.
Astronomy and Astrophysics
Astronomy
9
Bl Lacertae Objects, Brightness Distribution, Infrared Spectra, Spectral Energy Distribution, Ultraviolet Spectra, Iue, Radio Sources (Astronomy), Spectrophotometry, X Ray Spectra
Scientific paper
The BL Lacertae object PKS 0422+00 was observed with IUE (International Ultraviolet Explorer) on August 31-September 1, 1987, when the visual magnitude of the object was V = 16.2, and again about 4 months later (January 10, 1988) during an active state (V = 15.6). Quasi-simultaneous optical to infrared observations allow deriving a detailed spectral flux distribution from 8 x 10 to the 13th to 2.5 x 10 the 15th Hz, for each epoch. Fits in terms of broken power laws and logarithmic parabolas are discussed.
Bouchet Patrice
Falomo Renato
Maraschi Laura
Tanzi Enrico G.
Treves Aldo
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