This plot shows the right ascension and declination for each DEEP2 target (black) and those with positive ACS identifications (yellow).
The redshifts were measured using emission lines (Balmer Series, [NII], [SII], [OIII], [OII]) and the Calcium (H, K and other ) absorption features. Each redshift measurement was assigned a “quality” identifier according to at least two independent measurements . In the center the quality distribution is shown.
Quality codes were assigned on the basis of a set of criteria: a value of 4 is assigned to a “rock-solid” z measurement obtained from a spectrum with at least two clear features. A value of 3 indicates a good z value, with a 90% probability to be correct. At least two features are still required but ID is more doubtful than Q=4. A value of 2 indicates a non-usable measurement for the present catalog but the spectrum will be later revisited because a useful z value might be extracted from it. Q=1 means that the redshift is not usable and the data will never yield one. Q=-1 is reserved for stars.
This plot shows the z-magnitude diagram: magnitudes were obtained from Sextractor
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