I. Palomar Schmidt Field centered on Selected Area 57 (1981)

Objects have been selected for relative ultraviolet excess from a Palomar 1.2m Schmidt field centered on Kapteyn Selected Area 57, near the north galactic pole. Object selection to B = 20 mag used a novel semi-quantitative technique, permitting two-parameter color classification. All known quasars in the field have been rediscovered. Four new quasars are reported here. The integral number counts of the listed objects are given as a function of their assigned color classes. The population of objects belonging to color classes 1A, 1, and 1B should be comprised primarily of quasars and white dwarfs and should be virtually complete to B = 18.5 mag. https://ui.adsabs.harvard.edu/#abs/1981ApJS...46..117U/abstract https://ui.adsabs.harvard.edu/link_gateway/1981ApJS...46..117U/doi:10.1086/190739

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Work Title I. Palomar Schmidt Field centered on Selected Area 57 (1981)
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Open Access
Creators
  1. Peter D. Usher
Keyword
  1. white dwarfs
  2. quasars
  3. survey
  4. blue stars
License Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Work Type Research Paper
Acknowledgments
  1. A. Warnock III
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Deposited August 04, 2019

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