julienguy
commented
6 years ago Yes. And goodlines_asci.txt is the best choice.
looking at the code where it is used (bootcalib.load_gdarc_lines), you can add a column to the ASCII file without breaking anything.
Currently, QL uses lists of arc-lines for more than one QA algorithm. When running on arc lamps spectra, we calculate the X and 'W' (Y) sigmas of arc lines from the 2D preproc image. We also use these lines to fit lines of the 1D spectra to obtain Wsigmas and fit those to a polynomial to extract the Wsigma dependence on wavelength for each fiber. In these cases, we use a shortened list of 4-5 lines that were taken from simulation and compared to the DESI line lists in files such as goodlines_ascii.txt (please put the right file name here) that have been by bootcalib. In order for QuickLook to be 'quick', we have kept the number of lines low.
As work goes forward, it would better if we did not maintain our own line list, but instead could use a standard DESI line list used by other desispec software, perhaps like goodlines_asci.txt. However, in that case we would benefit from a field that marked well-isolated and bright lines, so that QL could filter on that to obtain the handful of best lines to rely on. Is this consistent with anticipated development in the offline pipeline or simulation areas? Where will such standard files reside?