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A-2 South Ecliptic Pole (SEP) Database


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1977-08-12 to 1979-01-09


The HEAO-1 A-2 SEP database is one of the secondary data bases derived from the MAX primary data base (77-075A-2N). MAX database records for observations of the South Ecliptic Pole region (cone of 12 degrees centered on the Large Magellanic Cloud) are extracted and reformatted. No analysis has been performed except to include quality flags for clean, superclean, source-in-field-of-view, pointing mode and digital status in the output record. A data analysis package is available on the microVAX of the GSFC Laboratory for High Energy Astrophysics.

Alternate Names

  • A-2 SEP Database


  • Astronomy: X-Ray


  • 77-075A-02K

Additional Information



Questions and comments about this data collection can be directed to: Dr. Cynthia Y. Cheung



NameRoleOriginal AffiliationE-mail
Dr. Laura A. WhitlockData ProviderNASA Goddard Space Flight
Dr. Jean H. SwankGeneral ContactNASA Goddard Space Flight
Mr. Brendan H. PerryProgrammerNASA Goddard Space Flight

Selected References

  • Piccinotti, G., et al., A complete X-ray sample of the high latitude (1b1 greater than 20 degree) sky from HEAO -1 A-2: Log N - log S and luminosity functions, NASA-GSFC, TM-82168, Greenbelt, MD, Aug. 1981.
  • Boldt, E., et al., Cosmic X-ray background: 1. The discrete source component, in (COSPAR) X-Ray Astronomy, 443-448, W.A. Baity, Pergamon Press, New York, NY, 1979.
  • Nugent, J. J., et al., HEAO A-2 soft X-ray source catalog, Astrophys. J. Suppl. Ser., 51, 1-28, doi:10.1086/190838, Jan. 1983.
  • Rothschild, R. E., et al., The cosmic X-ray experiment aboard HEAO-1, Space Sci. Instrum., 4, 269-301, 1979.
  • Marshall, F. E., et al., New hard X-ray sources observed with HEAO A-2, Astrophys. J. Suppl. Ser., 40, No. 3, 657-666, doi:10.1086/190600, July 1979.
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