Using SPYBALs to Improve Pipeline Wavelength Calibrations for the First-Order Gratings of the GHRS

Details Using SPYBALs to Improve Pipeline Wavelength Calibrations for the First-Order Gratings of the GHRS Using SPYBALs to Improve Pipeline Wavelength Calibrations for the First-Order Gratings of the GHRS

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ghrs.rept...53s&link_type=abstract

GHRS Instrument Science Report 053, 3 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Ghrs, Goddard High Resolution Spectograph

Scientific paper

GHRS ISR-052 showed that wavelengths produced by PODPS can be significantly in error compared to the solution that would re- sult from obtaining a WAVECAL in conjunction with a science ex- posure. This report illustrates how the information contained in Spectrum Y Balance (SPYBAL) exposure, which is routinely obtained before many GHRS exposures, can be used to correct the default wavelengths so that they are nearly as good as if a WAVECAL had been specified. This procedure can also be used with archival data.

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