McDowell, JonathanCanizares, ClaudeElvis, MartinLawrence, AndrewMarkoff, SeraMathur, SmitaWilkes, Belinda2017-02-131995McDowell, Jonathan C., Claude Canizares, Martin Elvis, Andrew Lawrence, Sera Markoff, Smita Mathur, and Belinda J. Wilkes. 1995. “The Unusual Quasar PG 1407+265.” The Astrophysical Journal 450 (September): 585. doi:10.1086/176168.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:30212148PG 1407+265, discovered in the Palomar-Green Survey (Schmidt & Green 1983), was identified as a z ˜ 1 radio-quiet quasar on the basis of a single weak line. Further observations over a wide wavelength range confirm the identification but reveal the object to have unusual emission-line properties. Broad Hα is the only strong emission line with Hβ and Lyα almost undetectably weak. The emission lines show a range in redshift of over 10,000 km s-1, systematically decreasing with ionization potential or, almost equivalently, increasing to longer wavelengths. A value of z = 0.94±0.02 is a reasonable statement of our knowledge of the quasar's redshift However, the object's continuum properties are those of a normal radio-quiet quasar. We discuss a number of possible models for the object, but its nature remains puzzling.en-USGALAXIES: QUASARS: INDIVIDUAL ALPHANUMERIC: PG 1407+265Journal Article2017-02-1310.1086/176294