2MASS Point Source Catalog (PSC) (catalogs.tmass)

Description

The 2MASS PSC catalog contains 470,992,970 near-infrared sources. A more detail description of the columns can be found here.

This table is cross-matched with Gaia DR2 gaia_source table through gdr2.tmass_best_neighbour reference table.

Columns

Name Type UCD Unit Description
tmass_oid int meta.id Incremental integer identifier added for the purpose of cross referencing
designation char meta.id Source designation formed from sexigesimal coordinates
ra double pos.eq.ra Angle[deg] J2000 right ascension with respect to the ICRS
dec double pos.eq.dec Angle[deg] J2000 declination with respect to the ICRS
err_maj float stat.error Angle[arcsec] Semi-major axis length of the one sigma position uncertainty ellipse
err_min float stat.error Angle[arcsec] Semi-minor axis length of the one sigma position uncertainty ellipse
err_ang short Angle[deg] Position angle on the sky of the semi-major axis of the position uncertainty ellipse (East of North)
j_m float phot.mag Magnitude[mag] J-band selected magnitude or 95% confidence upper limit
j_msigcom float stat.error Magnitude[mag] Total J-band magnitude uncertainty
h_m float phot.mag Magnitude[mag] H-band selected magnitude or 95% confidence upper limit
h_msigcom float stat.error Magnitude[mag] Total H-band magnitude uncertainty
k_m float phot.mag Magnitude[mag] K-band selected magnitude or 95% confidence upper limit
k_msigcom float stat.error Magnitude[mag] Total H-band magnitude uncertainty
ph_qual char meta.code.qual Photometric quality flag
ext_key int meta.id Unique identification number of the record in the XSC that corresponds to this point source.
jdate double time.epoch Time[Julian Date (day)] The Julian Date of the source measurement accurate to +30 seconds