Spectral Purity and slit throughputs for the First Order Spectroscopic Modes

Details Spectral Purity and slit throughputs for the First Order Spectroscopic Modes Spectral Purity and slit throughputs for the First Order Spectroscopic Modes

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7932l&link_type=abstract

HST Proposal ID #7932

Computer Science

Hst Proposal Id #7932

Scientific paper

SMOV data show that spectral lines are filled in when observed with large slits. This is because the OTA and the detector PSF are extended, in particular in the far-UV and the near-IR. Therefore an extracted spectrum at these extreme wavelengths is a complex superposition of spectrally pure and impure data, with the spectrally impure data coming from larger spatial distance. The purpose of this proposal is to measure and quantify this effect by observing strong absorption lines through slits of different sizes. The data are also useful to test model predictions for the slit throughputs.

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