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    Correlated ground based observations in support of the HEAO-1 X-ray observatory (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: 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.
    Keywords: SPACE RADIATION
    Type: NASA. Marshall Space Flight Center HEAO Sci. Symp.; p 214-222
    Format: application/pdf
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