Worrall, DianaWilkes, Belinda2017-06-081990Worrall, D. M., and B. J. Wilkes. 1990. “X-Ray Spectra of Compact Extragalactic Radio Sources.” The Astrophysical Journal 360 (September): 396. doi:10.1086/169130.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:32955262A comparison is conducted of the 0.1-3.5 keV mean power law energy spectral indices (alpha) measured by the Einstein Observatory IPC for (1) 19 low polarization, flat radio spectrum (FRS) core-dominant QSOs; (2) 12 highly polarized QSOs (HPQs); and (3) 24 radio-selected BL Lac objects. Individual spectral fits are presented for several sources for which results are unavailable elsewhere. A maximum-likelihood analysis was used to ascertain the mean power-law index and the standard deviation for each class, under the assumption of a Gaussian intrinsic distribution. The distributions for HPQ and FRS QSOs are similar, in contrast with a small sample of the X-ray-selected BL Lac objects. Implications of these findings for synchrotron self-Compton models are considered.en-USBL Lacertae objectsradiation mechanismsquasarsX-rays: sourcesX-rays: spectraJournal Article2017-02-0819902017-06-0810.1086/169130