Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..957k&link_type=abstract
In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 957-960 (SEE N90-258
Astronomy and Astrophysics
Astronomy
1
Bl Lacertae Objects, Infrared Sources (Astronomy), Radiation Laws, Radio Sources (Astronomy), Spectral Bands, X Ray Spectra, Background Radiation, Light (Visible Radiation), Stellar Spectra, Submillimeter Waves, Ultraviolet Astronomy
Scientific paper
Simultaneous multiwavelength observations of BL Lacertae were performed on two occasions separated by one month in June and July 1988. The radio, submillimeter, infrared, optical, ultraviolet, and X-ray wave bands were investigated. The results on the wideband photon spectra, show that the X-ray flux lies above the extension of radio-ultraviolet continuum. The slope of the X-ray spectra is flatter than that at optical-ultraviolet regimes, and its spectral index is between 0.7 and 1.0. Comparison with earlier observations indicates that the X-ray flux is correlated with submillimeter band.
Bregman Joel N.
Kawai Nobuyuki
Matsuoka Masaru
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