Computer Science
Scientific paper
Apr 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006stis.rept....2d&link_type=abstract
Instrument Science Report STIS 2006-02, 20 pages
Computer Science
Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis
Scientific paper
Long-slit spectroscopic observations of a star, using the G750L grating with perpendicular-to-slit steppingpatterns, are compared with models based on the Tiny Tim STIS imaging PSF. When the star is centered in theaperture (52x0.1, 52x0.1E1, 52x0.2, or 52x0.2E1), the observed ux exceeds the model predictions at distancesgreater than 0.2 arcsec from the center of the star, at ux levels below a few percent of the peak, due toscattering and diffraction. When the star is moved out of the aperture by one or two slit widths, the ux is lessthan predicted from the modelling. Possible reasons for this discrepancy are examined. The G750L gratingand the mirror used for CCD imaging each have a Lyot stop in their optical path, which broadens the PSFand requires an empirical adjustment in the modelling of narrow-slit spectroscopic PSFs. The G750M grating,often used for spatially resolved spectroscopy, does not have a Lyot stop. The effect of the Lyot stop on the PSFis shown in a comparison of the PSFs (observed and modelled) for target-centered pointings using the G750Mand G750L gratings.
No associations
LandOfFree
Spectroscopic PSF: Comparison of Data and Models for a Target Centered In and Out of the Aperture does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectroscopic PSF: Comparison of Data and Models for a Target Centered In and Out of the Aperture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic PSF: Comparison of Data and Models for a Target Centered In and Out of the Aperture will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1185565