NICMOS Grism Wavelength Calibration

Details NICMOS Grism Wavelength Calibration NICMOS Grism Wavelength Calibration

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009nicm.rept....6p&link_type=abstract

Instrument Science Report NICMOS 2009-006, 20 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Nicmos

Scientific paper

As part of the Cycle 16 NICMOS calibration program, new observations of planetary nebulae were obtained using all three NICMOS grisms (G096, G141, and G206). The aim of these observations was to re-derive the dispersion relations for the grism modes of NICMOS as well as to examine and parametrize any field dependence of the dispersion relation within the field of view of the instrument. In this ISR, we present updated versions of the dispersion relations of the G096, G141, and G206 grisms. While the field dependence is small (1-2% peak to peak variation), we also compute two dimensional polynomial solutions to compute more exact dispersion relations anywhere in the field of view of NICMOS.

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