Cycle 4 FOS Wavelength Calibration: Internal/external Offsets

Details Cycle 4 FOS Wavelength Calibration: Internal/external Offsets Cycle 4 FOS Wavelength Calibration: Internal/external Offsets

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5536k&link_type=abstract

HST Proposal ID #5536

Physics

Hst Proposal Id #5536

Scientific paper

Offsets between internal and external wavelength scales will be measured for 4 gratings on the blue side and for 5 gratings on the red side. This test will be performed using the 0.3" aperture and two external sources. Derived offsets can be applied to the polynomial fit of pixel number versus wavelength determined from the lines in the internal Pt/Cr-Ne lamp. Internal sources make up a small fraction of the exposure time and must be acquired at the same time as the external sources, so they can NOT be scheduled as parallel observations.

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