Guest Observer Facilities & Science Centers Select One AGILE ASCA BeppoSAX COBE CGRO Chandra EUVE GALEX GLAST HETE-2 INTEGRAL ROSAT RXTE Suzaku Swift WMAP XMM-Newton NASA Archives Select One ADS AstroGravS EOSDIS HORIZONS IRSA LAMBDA MAST Michelson NED NSSDC PDS SDAC SPDF Spitzer Science Center HEASARC Tip: View all tips [1]Note that due to a typographical error there was a factor 2 missing from the following equation in all versions of H92 prior to 1992 Oct 05 (the software used to generate the figures was, however, correct). HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Monday, 19-Jun-2006 11:40:52 EDT