TABLE 1. 2MASS Extended Source Catalog Key Parameters |
|
Parameter |
Description |
ra |
right ascension (J2000) in degrees; based on peak pixel |
dec |
declination (J2000) in degrees; based on peak pixel |
density |
Atlas image stellar number density: log(stars per deg2) with Ks < 14 mag |
<band>_ba |
<band> minor/major axis ratio fit to the 3 isophote |
<band>_phi |
<band> angle to 3 major axis (E of N) |
j_chif_ellf |
%chi-fraction for ellipse fit to 3 J-band isophote |
k_chif_ellf |
%chi-fraction for ellipse fit to 3 Ks-band isophote |
sup_ba |
minor/major axis ratio fit to 3 super-Atlas Image isophote |
sup_phi |
super-Atlas Image angle to major axis (E of N) |
sup_chif_ellf |
%chi-fraction for ellipse fit to super-Atlas Image 3 isophote |
r_k20fe |
20 mag/arcsec2 isophotal-Ks fiducial elliptical aperture semi-major axis |
<band>_m_k20fe |
<band> 20mag/arcsec2 isophotal fiducial elliptical aperture magnitude |
<band>_msig_k20fe |
<band> 1 uncertainty in <band>_m_k20fe |
<band>_flg_k20fe |
<band> confusion flag for <band>_m_k20fe |
<band>_m_7 |
<band> 7´´ radius circular aperture magnitude |
<band>_msig_7 |
<band> 1 uncertainty in 7´´ circular ap. mag |
<band>_flg_7 |
<band> confusion flag for 7´´ circular ap. mag |
<band>_peak |
<band> peak pixel surface brightness (mag/arcs2) |
<band>_5surf |
<band> mean surface brightness (r 5´´ ) (mag/arcs2) |
<band>_sc_sh |
<band> "shape" score; a.k.a. SH |
<band>_sc_wsh |
<band> "wsh" score; a.k.a. WSH |
<band>_sc_r23 |
<band> r23 score; a.k.a. R23 |
<band>_bisym_rat |
<band> bi-symmetric flux ratio |
<band>_bisym_chi |
<band> bi-symmetric cross-correlation 2 |
e_score |
extended source probability (1.0 = fuzziest; 2.0 = pointlike) |
g_score |
galaxy probability (1.0 = fuzziest; 2.0 = pointlike) |
Table Notes: <band> refers to the J, H and Ks bands.
Return to Section IV.5.