Closed dcunning11235 closed 9 years ago
A traceset gives the parameters of a curve fit to each fiber's trace on the CCD, i.e., pixel offset as a function of wavelength. The fits are based on "flat" calibration exposures, which uniformly illuminate each trace, and "arc" exposures, which illuminate specific well-known frequencies.
This is a curve fit to...flux? Or not a fit at all, something else?