Physics
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hstc.worke..37c&link_type=abstract
"2010 Space Telescope Science Institute Calibration Workshop - Hubble after SM4. Preparing JWST, held 21-23 July 2010 at Space T
Physics
Scientific paper
I provide some examples of the cross-calibration between the instruments aboard the Spitzer Space Telescope. Current cross-calibration accuracy between the Spitzer instruments is better than 5% and consistent with the calibration uncertainties of the instruments and the current uncertainties in the absolute calibration of infrared zero-points. Utility of cross-calibration extends beyond reconciling measured fluxes; examples are given of how cross-calibration can be used to identify/ mitigate instrumental signatures. The Spitzer cross-calibration efforts are placed in context by a brief review of the current state of absolute calibration in the infrared. The current accuracy of calibration is limited by knowledge of the fundamental zero points to about 2%. Rapid progress in the field is being made which suggests that the 1% absolute photometric accuracy requirement of some future dark energy probes can be met.
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