The NASA/NSO spectromagnetograph

Details The NASA/NSO spectromagnetograph The NASA/NSO spectromagnetograph

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..139..211j&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 139, no. 2, June 1992, p. 211-232. Research supported by NASA, National Solar Observatory,

Astronomy and Astrophysics

Astronomy

88

Charge Coupled Devices, Circular Polarization, Solar Magnetic Field, Solar Spectra, Solar Spectrometers, Solar Activity, Solar Observatories, Solar Terrestrial Interactions, Video Equipment

Scientific paper

The Kitt Peak Vacuum Telescope's spectromagnetograph features real-time digital analysis of long-slit spectra formed on a 2D CCD detector, and is located at an exit port of a Littrow spectrograph. Commercial video processing boards are used to digitize the spectral images at video rates and to separate, accumulate, and buffer the spectra in the two polarization states. A processor removes fixed-pattern bias and gain from the spectra in cadence with spatial scanning of the image across the entrance slit; a data-control computer conducts position and width analysis of the line profiles and records line-of-sight magnetic field, Doppler shift, and other computed parameters, as demonstrated by the early observations presented.

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