The Identification of White Dwarf Suspects in the Lowell Proper Motion Program

Abstract

During the course of the Lowell proper motion survey that has been in progress since 1957, an effort has been made to identify the very blue stars and more recently the extremely red ones. The proper motions are detected and measured directly by projection on the calibrated grid of the blink microscope. The regular program catalogs all motions found > 0 ^″_. 26/year and fainter than the eighth magnitude. From this portion of the program, we have identified 179 white dwarf suspects, 48 of color class − 1 and 131 of color class 0, which have been published in the Lowell Bulletins under the title of ‘Lowell Proper Motions II through XV’. These lists cover the entire northern hemisphere, and a few regions down as far as −10° South, and contain 10382 different individual stars. Finding charts are provided for each object.