A New Geometric-Distortion Solution for the STIS NUVMAMA

Details A New Geometric-Distortion Solution for the STIS NUVMAMA A New Geometric-Distortion Solution for the STIS NUVMAMA

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004stis.rept....1m&link_type=abstract

Instrument Science Report STIS 2004-01, 12 pages

Astronomy and Astrophysics

Astronomy

Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis, Space Telescope Imaging Spectrograph

Scientific paper

We have obtained a new geometric-distortion solution for the STIS NUV-MAMA using two fields in NGC 4214 and NGC 604 which were imaged using three filters (CN182, CN270, SrF2) for GO program 9096. (WF)PC2 images of the same objects in F170W and F336W were used as an astrometric reference. Different polynomial degrees and weighting mechanisms for the geometric distortion were tested until an adequate solution was obtained. Typical median errors between the predicted and the real positions were found to be in the range of 0.28 to 0.53 MAMA pixels (7-13 mas). A new geometric distortion table has been produced and tested. We discuss differences between this solution and the previous one that was presented in STIS Instrument Science Report 2001-02.

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