Improved wavelength calibration for the WFC G800L grism

Details Improved wavelength calibration for the WFC G800L grism Improved wavelength calibration for the WFC G800L grism

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop10058w&link_type=abstract

HST Proposal ID #10058

Computer Science

Hst Proposal Id #10058

Scientific paper

ACS G800L observations of an emission line star {the WC Wolf-Rayet star WR96} and a compact planetary nebula {LMC-SMP81} will be obtained to provide improved coverage of the field variation of the dispersion solution for the WFC and G800L grism. A direct image and a corresponding grism image will be taken at many different positions across the WFC field. By fitting the emission lines, the field dependence of the wavelength zero point and dispersion will be measured. The WR star was already used in Cycle 11 calibrations and these observations provide improved spatial coverage to map the variation of the dispersion with position. The observations of the fainter planetary nebula provide an independent wavelength calibration for a few points over the field.

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