[National Aeronautics and Space Administration] ; [National Technical Information Service, distributor],
"Monitoring MRK 509 [microform] : the origin of the reprocessor" and "Broad band X-ray spectrum of narrow line Seyfert 1 AKN 564"
Origin of the reprocessor
Broad band X-ray spectrum of narrow line Seyfert 1 AKN 564
[NASA contractor report] ;
NASA contractor report ;
Halpern, Jules P.
Leighly, Karen M. (Karen Marie)
Columbia University. Trustees.
Columbia Astrophysics Laboratory (Columbia University)
United States. National Aeronautics and Space Administration.
submitted by the Trustees of Columbia University in the City of New York ; prepared by Columbia Astrophysics Laboratory, Departments of Astronomy and Physics, Columbia University ; principal investigators, Jules P. Halpern & Karen M. Leighly.
"Monitoring MRK 509 [microform] : the origin of the reprocessor" and "Broad band X-ray spectrum of narrow line Seyfert 1 AKN 564"