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Precision of the calibration of the axaf engineering test article (veta) mirrors
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zhao, Ping Kellogg, Edwin M. Hughes, John P. Schwartz, D. A. Chartas, G. |
| Copyright Year | 1992 |
| Description | Measurements of the VETA encircled energies have been performed at 5 energies within 16 radii ranging from 0.05 to 200 arcseconds. We report here on the analysis of the accuracy of those measurements. A common 'error tree' structure applies, and we present representative numbers for the larger terms. At 0.277, 1.5, and 2.07 keV, and for radii of 3 arcsec and larger, our measurements have estimated 1 sigma errors of 0.6 to 1.5 percent. Effects of measurement statistics and of the VETA test mount limit the accuracy at smaller angles, and modulation by the counter window support structure together with the imperfect position repeatability limit the accuracy for the 0.93 and 2.3 keV energies. We expect to mitigate these limitations when calibrating the complete AXAF flight mirror assembly. |
| File Size | 827786 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930017000 |
| Archival Resource Key | ark:/13960/t5r83842z |
| Language | English |
| Publisher Date | 1992-10-23 |
| Access Restriction | Open |
| Subject Keyword | Optics Radii Calibrating Precision Modulation X Ray Astrophysics Facility Mirrors Position Errors Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
