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CATALOGS OF UNIQUE GALEX GR5 SOURCES MATCHED TO SDSS DR7
In the same paper Bianchi et al. (2011, MNRAS, 411, 2770) matched their catalogs of unique UV
sources to the seventh SDSS data release (DR7)
These 3 tarfiles contain 23 files, each covering a 5 degree band of Galactic latitude.
MIS GALEX magnitudes (0.4G) (GR5xDR7_*_*_gmags.mis.dat)
MIS SDSS magnitudes (0.3G) (GR5xDR7_*_*_smags.mis.dat)
MIS SDSS flags (0.2G) (GR5xDR7_*_*_sflags.mis.dat)
These 3 tarfiles contain 180 files, each covering a 1 degree band of Galactic latitude.
AIS GALEX magnitudes (0.8G) (GR5xDR7_*_*_gmags.ais.dat)
AIS SDSS magnitudes (0.7G) (GR5xDR7_*_*_smags.ais.dat)
AIS SDSS flags (0.5G) (GR5xDR7_*_*_sflags.ais.dat)
These files contain the matched GALEX-SDSS objects resulting from searching the GALEX coordinates of objects in the "GALEX unique sources catalogs" described above against the SDSS PhotoPrimary table. They correpond to columns 6 and 7 of Table 2 in Bianchi et al. (2011, MNRAS, 411, 2770). A match radius of 3 arcsec was used in constructing final matched catalogs (see paper for details).
For each survey (MIS, AIS) the data are split among three
A GALEX source may have multiple SDSS matches, due to the higher SDSS spatial resolution.
Sources with multiple matches are not useful for color analyses (the GALEX magnitudes may be
a composite of nearby sources), therefore we introduced a flag whereby sources with multiple optical matches
can be identified.
rank = 0: One (and only one) SDSS source matched the GALEX source
Contains information on GALEX sources, plus the matched SDSS objid (listed below as "sdssid") as well as the "rank" flag. Included fields are:
Contains mainly magnitude information on SDSS sources. Included fields are:
#objid,ra,dec,dist,type, petromag_u,petromagerr_u,petromag_g,petromagerr_g,petromag_r,petromagerr_r, petromag_i,petromagerr_i,petromag_z,petromagerr_z,specobjid, propermotion,usno_blue,usno_red,rank
NOTE: "objid" here is the SDSS objid, and "ra" and "dec" are
the SDSS photometric coordinates;
"dist" is the distance
from the corresponding GALEX source coordinates in arcmin; "rank" is described
above. USNO magnitudes are from the USNO database, described at the CAS SDSS site, under Tables, USNO.
Contains mainly photometry-flag information on SDSS sources. The individual flags (e.g, "_sat" for saturation or "_cr" for cosmic ray) for the different magnitudes (u,g,r,i,z) were extracted from SDSS "flags" field. Included fields are: