Background-Induced Measurement Errors of the Coronal Intensity, Density, Velocity, and Magnetic Field |
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| Authors: | MJ Penn H Lin S Tomczyk D Elmore P Judge |
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| Institution: | (1) National Solar Observatory, 950 N Cherry Av, Tucson, AZ, 85719, U.S.A;(2) Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI, 96822-1897, U.S.A;(3) High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO, 80307, U.S.A |
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| Abstract: | The effect of a background signal on the signal-to-noise ratio is discussed, with particular application to ground-based observations of emission lines in the solar corona with the proposed Advanced Technology Solar Telescope. The concepts of effective coronal aperture and effective coronal integration time are introduced. Specific expressions are developed for the 1 measurement errors for coronal intensity, coronal electron density, coronal velocity, and coronal magnetic field measurements using emission lines and including a background. |
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