QC1 parameters written in QC1 database: QC1 DB names: num_stars | zp_frame | sig_zp_frame | ext_coeff_used | col_term_used | colour
All parameters are calculated by the pipeline recipe.
Description of algorithms: num_stars: number of stars used in zeropoint computation zp_frame: averaged gain-corrected zeropoint of frame (in e-);
averaging uses biweight estimator from Beers et al. 1990, AJ 100, 32 sig_zp_frame: error of frame zeropoint ext_coeff_used: fixed value col_term_used: fixed value colour: colour used
trending uses zeropoints for complete night which are calculated from all available fields for
each filter and are stored into QC1 DB table vimos_zp_night