Data Release 1 Catalog

The PRIMUS data release 1 (DR1) redshift catalog includes 216,161 entries, with 16 fields (or tags) per entry. This page provides a description of the included tags in the fits catalog.

Coverage Maps

Redshift Distributions

Absolute Magnitude and Redshift

Redshift Catalog Tags

Below is a table of the tags in the DR1 redshift catalog, including their format, value units and descriptions. K-correct (v4.2; (Blanton & Roweis 2007) synthesized magnitudes are calculated using Ω_m=0.3, Ω_Λ=0.7, and h₇₀ = H₀/100 = 1.0. and the AB magnitude System (Oke & Gunn 2003)

Tag	Format	Unit	Description
OBJNAME	10A		Unique PRIMUS Object Name
RA	D	degree	Right Ascension J2000
DEC	D	degree	Declination J2000
SURVEY	12A		Name of mask design run
FIELD	13A		Field on plane of sky ('calib' means a calibration field, others are: cdfs, cfhtls_xmm, cosmos, deep2_02hr, deep2_23hr, dls, es1, sdss_stripe82, xmm)
MASK	8A		Mask Name
Z	E		Best-fit PRIMUS redshift (z=0 for sources that are best fit by a star template, see first survey paper for details)
ZQUALITY	I		PRIMUS redshift quality flag; =4 is the highest-quality redshifts with dz/(1+z)~0.003, =3 is redshifts with dz/(1+z)~0.015, =2 is redshifts with dz/(1+z)~0.036, =-1 is for sources that are best fit by a star; see the second survey paper for details (Cool et al. 2013) (most PRIMUS team science papers use =3 or 4)
PRIMARY	I		=1 if the target is in the 'primary' sample, defined from the target imaging to have a recoverable selection function; to choose objects with a recoverable selection function, only use those with primary=1
INWINDOW_2MASK	I		=1 if target is in a region of the sky observed with two slitmasks (as opposed to one); to choose objects with a recoverable selection function, only use those with inwindow = 1
CLASS	6A		Classification as star, galaxy, or AGN based on the best-fit template type that was used to fit the redshift
WEIGHT	E		Targeting weight; multiple all sources by this targeting weight to recover a statistically-complete sample (See the first survey paper Coil et al. 2011 for details)
TARGET_MAG	E		Optical targeting magnitude measured in the TARGET_BAND.
TARGET_BAND	A		Targeting K-correct filter of the targeting magnitude (TARGET_MAG).
BESSELL_MAG	5E	ABmag	K-correct synthesized observed-frame Bessel magnitude [UBVRI]. This magnitude may include non-optical photometry where available (see Moustakas et al. 2013 for details)
BESSELL_ABSMAG	5E	ABmag	K-correct synthesized restframe Bessel absolute magnitude [UBVRI]. This magnitude may include non-optical photometry where available (see Moustakas et al. 2013 for details)
SDSS_MAG	5E	ABmag	K-correct synthesized observed-frame SDSS magnitude [ugriz] at z=0. No band-shift has been applied. This magnitude may include non-optical photometry where available (see Moustakas et al. 2013 for details)
SDSS_ABSMAG	5E	ABmag	K-correct synthesized restframe SDSS absolute magnitude [ugriz] at z=0. No band-shift has been applied. This magnitude may include non-optical photometry where available (see Moustakas et al. 2013 for details)

Photometric Catalog Tags

This catalog is line-matched to the DR1 redshift catalog and contains photometric magnitudes and errors. We used existing photometry in each field to choose targets for spectroscopy. As the imaging was taken from several different sources (using different cameras on different telescopes), it is not expected to be perfectly homogeneous. Table 4 of Coil et al. 2011 lists the optical imagining used for each field, in addition to the telescope and camera that it was taken with, as well as zeropoint offsets that were applied, and the reference or source of the data. The zeropoint offsets used in this catalog have been calibrated independently from the public catalogs (see details in Coil et al. 2011). We adopt a minimum error floor to the photometry in each field, between 2%-10% in each band, which is used during redshift determination. For catalogs that were on the Vega system, we applied Vega-to-AB corrections as listed in the table. Catalogs that were on the AB system did not require corrections.

We thank the CFHTLS, COSMOS, DLS, and SWIRE teams for their public data releases and/or access to early releases. This catalog includes data gathered with the 6.5m Magellan Telescopes located at Las Campanas Observatory, Chile. We thank the support staff at LCO for their help during our observations, and we acknowledge the use of community access through NOAO observing time. Some of the data used for this catalog is from the CFHTLS public data release, which includes observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS. We also thank those who have built and operate the Chandra and XMM-Newton X-Ray Observatories. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

Any use of this photometric catalog should cite the relevant photometric papers from Table 3 of Coil et al. 2011.

Tag	Format	Unit	Description
OBJNAME	10A		Unique PRIMUS Object Name
RA	D	degree	Right Ascension J2000
DEC	D	degree	Declination J2000
SURVEY	12A		Name of mask design run
FIELD	13A		Field on plane of sky ('calib' means a calibration field, others are: cdfs, cfhtls_xmm, cosmos, deep2_02hr, deep2_23hr, dls, es1, sdss_stripe82, xmm)
FILTERLIST	2016A (32, 63)		K-correct filter name for the observed magnitude (MAG) and magnitude error (MAGERR).
MAG	63E	ABmag	Magnitude of the source in observed bands (see FILTERLIST). Sources are not measured in all filters, and null values are included as -999.0.
MAGERR	63E	ABmag	Magnitude errors of the source in observed bands (see FILTERLIST). There is a minimum error floor applied to the photometry in each field, between 2%-10% in each band. Sources are not measured in all filters, and null values are included as -999.0.

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