Faint Blue Objects at High Galactic Latitude. III. Palomar Schmidt Field Centered on Selected Area 28

Peter D. Usher, Kenneth J. Mitchell https://ui.adsabs.harvard.edu/link_gateway/1982ApJS...49...27U/doi:10.1086/190789 https://ui.adsabs.harvard.edu/#abs/1982ApJS...49...27U/abstract

A list of sources selected by their ultraviolet excess from three-color U, B, V plates taken with the 1.2 m Palomar Schmidt telescope is presented. The list contains 1179 objects, and the field is centered on star SAO 42564, about 35 arcmin ENE of the central bright star in Kapteyn Selected Area 28. Three-color images on plate PS 24771 were scanned three times by eye, and color classes and sub-classes were assigned to selected objects according to a semi-quantitative technique. The population belonging to color classes 1A, 1, and 1B should consist primarily of quasars and white dwarfs and should be statistically complete to at least B = 18.5 mag.

The US Survey was conducted at the behest of Allan Sandage. US1329 is a hitherto undiscovered quasar of magnitude 15.6 discovered by a team of four Penn State graduate students at the Astronomy Department's 61-inch telescope at Black Moshannon Observatory. It is arguably the only optically-identified quasar discovered with a ground-based telescope in Pennsylvania. Observations were initiated by Kenneth J. Mitchell over the year-end holidays in 1982. Publications of the Astronomical Society of the Pacific, 95, no. 563 (January 1983): 45-47.