zwarn0width=640,height=400,toolbar=no,scrollbars=yes,resizable=yes 0 & sky fiber (SKY)
1 & too little wavelength coverage (LITTLE_COVERAGE)
2 & chi-squared of best fit is too close to that of second best (SMALL_DELTA_CHI2)
4 & synthetic spectrum is negative (NEGATIVE_MODEL)
8 & fraction of points more than 5 sigma away from best model is too large (>0.05) (MANY_OUTLIERS)
16 & chi-squared minimum at edge of the redshift fitting range (Z_FITLIMIT)
32 & a QSO line exhibits negative emission, triggered only in QSO spectra, if C_IV, C_III, Mg_II, H_beta, or H_alpha has LINEAREA+3*LINEAREA_ERR<0 (NEGATIVE_EMISSION)
64 & the fiber was unplugged/broken, so no spectrum obtained (UNPLUGGED)
128 & catastrophically bad targeting data (BAD_TARGET)
256 & No data for this fiber, e.g. because spectrograph was broken during this exposure (ivar=0 for all pixels) (NODATA)
512 & Bad parabola fit to the chi2 minimum (BAD_MINFIT)
1024 & Poor input data quality but try fitting anyway (POORDATA)
2048 & DELTACHI2 is lower than 25 for a DESI SV3 target (LOW_DEL_CHI2)
4096 & DELTACHI2 is lower than 40 for a DESI SV3 BGS target in bright time (LOW_DEL_CHI2_BGS)
8192 & QA rejected due to spectrum-level problems (BAD_SPECQA)
16384 & QA rejected due to petal-level problems (BAD_PETALQA)