Recent results from the San Fernando Observatory video spectra-spectroheliograph.

Details Recent results from the San Fernando Observatory video spectra-spectroheliograph. Recent results from the San Fernando Observatory video spectra-spectroheliograph.

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sopo.work...37c&link_type=abstract

Solar Polarimetry, Proceedings of the 11th Sacramento Peak Summper Workshop. Edited by L.J. November. Sunspot, NM: National Sola

Physics

2

Scientific paper

Results are presented from VSSHG observations of an extensive sunspot group, NOAA 5669, that transited disk center on 4 September 1989. The data are presently processed to obtain four images: a saturation-free longitudinal magnetogram, a Dopplergram, a continuum image, and a line core spectroheliogram. All images are from two-dimensional spectral data with a spectral window of about 1 Å, centered on the 6302.5 Å line of neutral iron. The images show the well-known "fringing" of sunspot fields, the "unsymmetrical" Evershed flow as well as large-scale flow patterns within the active region.

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