Limb Darkening at 670 nm Measured from RHESSI

Details Limb Darkening at 670 nm Measured from RHESSI Limb Darkening at 670 nm Measured from RHESSI

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp21b..04z&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP21B-04

Physics

7522 Helioseismology, 7529 Photosphere, 7537 Solar And Stellar Variability (1650), 7544 Stellar Interiors And Dynamo Theory

Scientific paper

The Solar Aspect System (SAS) on RHESSI uses linear CCD detectors to make chord images across the solar disk. The three independent detectors record about 1,000 images per day each, and RHESSI has been observing since launch in 2002. Here we report on the these data, including models of the limb-darkening and point spread function, our methods for calibration, and a survey of the observations. We will present results on possible time and latitude dependences of the limb-darkening coefficients, and discuss sources of contamination to a 'quiet-sun' limb-darkening model.

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