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Star-Image Centering with Deep Learning II: HST/WFPC2 Full Field of View
Dana I. Casetti-Dinescu, Roberto Baena-Galle, Terrence M. Girard +2
We present an expanded and improved deep-learning (DL) methodology for determining centers of star images on HST/WFPC2 exposures. Previously, we demonstrated that our DL model can…
Star-Image Centering with Deep Learning: HST/WFPC2 Images
Dana I. Casetti-Dinescu, Terrence M. Girard, Roberto Baena-Galle +2
A Deep Learning (DL) algorithm is built and tested for its ability to determine centers of star images on HST/WFPC2 exposures, in filters F555W and F814W. These archival observatio…
A Comprehensive Astrometric Calibration of HST's WFPC2. I. Distortion Mapping
Dana I. Casetti-Dinescu, Terrence M. Girard, Vera Kozhurina-Platais +3
Wide field planetary camera 2 (WFPC2) exposures are already some 20 years older than Gaia epoch observations, or future JWST observations. As such, they offer an unprecedented time…
The Third US Naval Observatory CCD Astrograph Catalog (UCAC3)
N. Zacharias, C. Finch, T. Girard +27
The third US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC3 was released at the IAU General Assembly on 2009 August 10. It is the first all-sky release in this series and c…