Position of OH471

Abstract

Carswell and Strittmatter, reporting the high redshift¹ they measured for OH471, do not quote the accurate radio and optical coordinates which were the basis of its identification. These coordinates are: Radio α(1950) = 06 h 42 min 53.3 s ±0.2s δ(1950)=44° 54′ 33″ ± 1″ Optical α(1950)=06 h 42 min 53.1 s ±0.1 s δ(1950) =44° 54′ 31″ ±1″ The radio position was measured by the method described by Adgie et al.² except that an interferometer spacing of only 1,300 wavelengths was used. The optical position was measured on the prints of the Palomar Sky Survey relative to AGK2 stars: the accuracy achieved was estimated from the distribution of radio-optical position differences obtained in a large number of similar measurements.