After the wavelength calibration is obtained from a MOS arc lamp exposure, the wavelength corresponding to the center of the CCD is computed (only if all slitlets are in the center of the CCD). The values trended here are for the 300V grism with a slit width of 1.0" and the order separation filter GG435. Data have been acquired using the blue-sensitive EEV detector.
DB Name: fors2_mos_wave
TPL.ID: FORS2_specphot_cal_daycalib
QC1 DB parameter: central_wlen
More information can be found on the plot tutorial page