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A Chandra Minisurvey of X‐Ray–weak Quasars

  • Authors: G. Risaliti, M. Elvis, R. Gilli, and M. Salvati

Risaliti et al. 2003 The Astrophysical Journal Letters 587 L9.

  • Provider: AAS Journals

Caption: Fig. 2.

Chandra spectra of the sample of X‐ray–weak quasars. The shaded region represents the X‐ray spectrum expected assuming ﹩\alpha _{\mathrm{OX}\,}=1.55﹩ and ﹩\Gamma =1.8﹩. ROSAT upper limits are shown for the three sources having fluxes significantly higher than those in ROSAT observations.

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