Other
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249..394f&link_type=abstract
Astrophysical Journal, Part 1, vol. 249, Oct. 1, 1981, p. 394-398.
Other
23
Brightness Temperature, Faculae, Photosphere, Solar Magnetic Field, Solar Temperature, Spectroheliographs, Magnetic Flux, Opacity, Raster Scanning, Signal To Noise Ratios, Solar Atmosphere, Spectrum Analysis, Telephotometry
Scientific paper
A photometric technique is presented which allows the observation of faculae across the entire solar disk. A clean continuum was used and granular noise was reduced by subtracting simultaneous spectroheliograms taken at widely separated points of the photospheric radiation curve. Spectroheliographic observations taken from March 12-14, 1980, using two color-scans in the green at gamma 4980.96 and gamma 5256.31 in the fourth order resulted in observation of clean continua in the red at gamma 6641.85 and gamma 7008.8 in another slot of the magnetograph. Approximately 20 raster scans were obtained and indications were found that dark magnetic facular structures in the Delta signal were cooler than the photosphere at equal optical continuum depths
Duvall Jr. T.
Foukal Peter
Gillipsie B.
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