Spectrograph distortion in sunspot line profiles |
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| Authors: | V Martínez Pillet J Sánchez Almeida |
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| Institution: | (1) Center for Astrophysics and Space Science UCSD, La Jolla, U.S.A.;(2) Astronomical Institute, Ond ejov, Czechoslovakia;(3) Center for Astrophysics and Space Science, UCSD, La Jolla, U.S.A. |
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| Abstract: | We show empirically how the effect of the instrumental polarization of the spectrograph can distort the shape of the intensity profiles in sunspots. In order to avoid the problems an analysis of the polarization of the light should be performed at the entrance slit of the spectrograph.Based on observations made with the Vakuum Tower Teleskop (V.T.T.) operated on the island of Tenerife by the Kiepenheuer-Institut für Sonnenphysik (Freiburg, F.R.G.) in the Spanish Observatorio del Teide of the Institute de Astrofísica de CanariasThe National Center for Atmospheric Research is sponsored by the National Science Foundation |
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