From a wavelength calibrated LSS arc lamp exposure, the mean spectral resolution from all lines in the catalog is computed. Each single spectral resolution is computed as the ratio between the arc lamp line wavelength and its FWHM. The values trended here are for the
red sensitive MIT detector, the 300V grism with no filter and a slit width of 0.29".
On 2018-08-28 new pipeline (v.5.3.35) was introduced. The method of calculating spectral resolution changed and the new values are significantly lower.
On 2024-09-01 binning of the LSS_HC_LAMP calibrations was changed from 2x2 to 1x1. This created a jump in the resolution estimates.
DB Name: fors2_lss_wave
TPL.ID: FORS2_lss_cal_daycalib
QC1 DB parameter: central_resol
More information can be found on
the plot tutorial page