A search for X-Ray luminous late type stars in NIPSS data

  • Eric R. Craine
  • Santiago Tapia
  • Roger B. Culver
Re-examining the Corona/Wind Dividing Line
Part of the Lecture Notes in Physics book series (LNP, volume 291)


The purpose of this project is to obtain optical identifications of x-ray luminous late type stars. Our approach consists of detecting position coincidences between unidentified x-ray sources and stars for which (V-I) > 3 mag., as obtained from the Near Infrared Photographic Sky Survey (NIPSS) database. Objects with effective temperatures below 3000 K are the most frequent counterparts found by this method at high galactic latitudes (Craine 1987). In this paper we present a derivation of the detection limits of the NIPSS relevant to the lower main sequence dwarf stars. Significantly, M8 or M9 stars with apparent V magnitudes below the detection limit may still appear on the NIPSS I band photographs, where the detection limit is extended to pre-main sequence objects of about 0.03 solar luminosity.


Main Sequence Tauri Star Dwarf Star Solar Luminosity High Galactic Latitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Eric R. Craine
    • 1
    • 2
  • Santiago Tapia
    • 1
    • 3
  • Roger B. Culver
    • 1
    • 2
  1. 1.Western Research Company, Inc.Tucson
  2. 2.Dept of PhysicsColorado State UniversityFt. Collins
  3. 3.Steward ObservatoryUniversity of ArizonaTucson

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