Throughput Calibration of the 52x0.2E1 Aperture

Details Throughput Calibration of the 52x0.2E1 Aperture Throughput Calibration of the 52x0.2E1 Aperture

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11652h&link_type=abstract

HST Proposal ID #11652. Cycle 17

Physics

Scientific paper

The Next Generation Spectral Library {NGSL} is a library of low-dispersion STIS spectra extending from 0.2-1.0 microns. So far, 378 stars with a wide range in metallicity have been observed. Despite their high S/N>100, many NGSL spectra have 5-10% systematic errors in their spectral energy distributions, which can be traced to throughput variations in the 52x0.2E1 aperture caused by vignetting of a wavelength-dependent asymmetric PSF. We propose to obtain STIS spectra of the HST standard star, BD+75D325, at several positions in the 52x0.2E1 aperture, which will enable us to calibrate the NGSL spectra properly.;

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