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- W1640986564 abstract "sharp and stable point spread function of HST and WFC3 allows for the detection of stellar companions at small offsets from target stars. Deep images obtained through six UVIS filters are used to assess this ability to detect faint companions of brighter targets. Analogous capabilities from the ground make use of Adaptive Optics and Speckle imaging. We contrast the capabilities of HST/WFC3 with several existing AO systems for imaging of V �12 stars for which detection of faint companions as close as possible is desired, and to a delta-magnitude of �10. The observations under comparison are motivated by high-resolution imaging applications for the Kepler Mission to constrain the existence of fainter background stars which, if eclipsing binaries, could mimic transits. The HST/WFC3 observations are found to be superior in the comparisons made to Keck, MMT and Palomar AO and WIYN Speckle systems in terms of delta-magnitude limits outside of about 0.3 arcseconds. In a metric of fraction of phase space that can be probed for delta-magnitude to 10 companions out to 2 arcsecs the UVIS imaging out performs all other approaches by a factor � 5." @default.
- W1640986564 created "2016-06-24" @default.
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- W1640986564 date "2011-01-01" @default.
- W1640986564 modified "2023-10-16" @default.
- W1640986564 title "WFC3 UVIS High-resolution Imaging Performance" @default.
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- W1640986564 hasPublicationYear "2011" @default.
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