The following bits are used for the MUSE_DEEP score flag:
========================================================= 

bit     parameter       criterion
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A) Processing quality:
1	CHECK_BKG	no error upon master sky fit OR sky line fit,
                        in any of the input pixel tables? --> 0
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B) Nature of observation:
2	IS_OBJ		yes --> 0 (always)
3	HAS_SKY		dedicated SKY exists? yes -->0; no -->1
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C) Quality of product (0 means that none of the input pixel tables had 1)

4	ARC_CLOSE	arc calibration prev/next day/within 1.5d?
                        yes -->0; no -->1  
5     	SKY_FLAT	processed with twilight SKY_FLAT?
			yes -->0; no -->1
6	NUM_SAT		number of saturated pixels in raw file below 300?
			yes -->0; no -->1
7	NUM_SRC		number of sources found by the pipeline
			>0? -->0; none -->1
8	HISTO_BKG	background histogram criterion
			>-20? -->0 else 1
9	LSHIFT_MAX	max. residual shift of wavelength scale 
			<0.5 A? yes-->0  

10	ALIGNMENT	differential offset between rotated observations
			<6e-5 deg (0.2arcs) *AND* all input frames matched? -->0
			(1 if offset larger than threshold, OR not all input frames
			 matched, OR no alignment applied)

Bit #11 is not defined and marked by a dot, for alignment with the scoring scheme
for MUSE datacubes.



0000000000. for a DATACUBE_DEEP with extra SKY, no quality issues, standard single template
0010000000. for a DATACUBE_DEEP without extra SKY, no quality issues, standard single template
0010010000. for a DATACUBE_DEEP without extra SKY, at least one raw file had more than 300 pixels saturated