Multifrequency Observations Of Bl Lacertae In 1988
ASTROPHYSICAL JOURNAL(1991)
摘要
Simultaneous multiwavelength observations of BL Lacertae were performed on two occasions separated by 1 month in 1988 June and July, covering the radio, submillimeter, infrared, optical, ultraviolet, and X-ray wave bands. In the wide-band photon spectra, the X-ray flux lies clearly above the extension of radio-ultraviolet continuum as expected. The slope of the X-ray spectra is significantly flatter than that at optical-ultraviolet regimes, and its spectral index 0.7-1.0 corresponds to the slope at submillimeter band. Comparison with earlier observations, in fact, indicates that the X-ray flux is correlated with the submillimeter band, and not with the others, and supports the SSC model.
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关键词
BL LACERTAE OBJECTS, INFRARED, SOURCES, RADIATION MECHANISMS, RADIO SOURCES, VARIABLE, X-RAYS, SPECTRA
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