Precision Parallaxes of Cepheids and RR Lyraes Using the Wf/pc

Details Precision Parallaxes of Cepheids and RR Lyraes Using the Wf/pc Precision Parallaxes of Cepheids and RR Lyraes Using the Wf/pc

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2691d&link_type=abstract

HST Proposal ID #2691

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Hst Proposal Id #2691

Scientific paper

A new technique using the WF/PC should allow astrometric positions to be determined with an accuracy of 0.0002 arcsec 0.2 m.a.s. from two PC frames. We propose an initial test of the technique. Our new technique involves trailing HST during exposures to help alleviate the problem of undersampling inherent in the WF/PC. Once our technique of precision astrometry is proven, it should have numerous applications.

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