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The Discovery of Quasi-stellar Objects behind M31 and M33

  • Authors: Philip Massey, Kathryn F. Neugent, and Emily M. Levesque

2019 The Astronomical Journal 157 227.

  • Provider: AAS Journals

Caption: Figure 1.

Spectra of newly found QSOs from Table 2. We have indicated the principal lines used for determining the redshifts.

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