Correlated ground based observations in support of the HEAO-1 X-ray observatory

Details Correlated ground based observations in support of the HEAO-1 X-ray observatory Correlated ground based observations in support of the HEAO-1 X-ray observatory

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979msfc.symp..214m&link_type=abstract

In NASA. Marshall Space Flight Center HEAO Sci. Symp. p 214-222 (SEE N80-14977 05-88)

Computer Science

Bl Lacertae Objects, Extraterrestrial Radiation, Heao 1, X Ray Sources, Line Spectra, Optical Emission Spectroscopy, Photometry

Scientific paper

Using X-ray and optical photometry of UBVRI fluxes, energetic compact extragalactic sources were studied, such as BL Lacerta (Lac) and BL Lac objects-Markarian (Mrk) 421, Mrk 501, and B2 1308+32. BL Lac and BL Lac objects were found to have predominantly nonthermal spectrums. Photometric and spectroscopic properties of X Persei, an unusual Be star associated with an intrinsically weak X-ray source, were also studied. Both its X-ray and optical emission show complex variability on many different time scales.

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