J. Anderson et Ir. King, Astrometric and photometric corrections for the 34th row error in HST's WFPC2 camera, PUB AST S P, 111(763), 1999, pp. 1095-1098
Citations number
5
Categorie Soggetti
Space Sciences
Journal title
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
A small manufacturing defect, known but rarely noted, occurs at approximate
ly every 34th row of each of the chips of WFPC2. This defect induces errors
in photometry at the 0.01-0.02 mag level for about 6% of all stars, and pe
riodic errors in astrometry for all stars, with an amplitude of 0.03 pixel.
We derive simple corrections for these errors. The errors exist in all ast
rometry and photometry previously done with WFPC2, but they can be avoided
in future work by applying the corrections that we give here.