SDSS-SKYSURF Catalog Column Descriptions
SDSS-SKYSURF Source Catalogs
The columns for the SDSS object count catalogs are defined as follows:
| Column | Definition |
|---|---|
| ra, dec | Position of SDSS Object |
| objid | SDSS photometric object identification number |
| u, g, r, i, z | SDSS model magnitude corrected for Milky Way extinction |
| err_u, err_g, err_r, err_i, err_z | 1-sigma uncertainty in corresponding u, g, r, i, or z magnitude |
| type_u, type_g, type_r, type_i, type_z | SDSS Object Type |
| flags_u, flags_g, flags_r, flags_i, flags_z | SDSS Photometric Flag |
| ok_u, ok_g, ok_r, ok_i, ok_z | 1 if flags_* value is good; 0 if flags_* value is bad |
| fiber2Mag_u, fiber2Mag_g, fiber2Mag_r, fiber2Mag_i, fiber2Mag_z | Magnitude in central 2 arcseconds |
| Image Names | SKYSURF images for which this object is associated with (within 5 arcminutes) |
| Datasets | SKYSURF datasets for which this object is associated |
SDSS-SKYSURF Integrated Galaxy Light Catalogs
The columns for the SDSS IGL catalogs are defined as follows:
| Column | Definition |
|---|---|
| Image Name | SKYSURF Image Name |
| RA, Dec | Position of the center of the SKYSURF image |
| # of Objects | Number of SDSS galaxies (ABmag<22.5) in that image |
| # of Bright Objects | Number of bright (ABmag<18) SDSS galaxies in that image |
| Search Area | Area of SDSS search (+/- 5 arcmin in RA and Dec) |
| Object Density | Number of galaxies per square arcminute (# of Occurences/ Image Area) |
| Total u/g/r/i/z-band IGL | Total IGL (down to AB mag=22.5) for the corresponding SDSS filter (u, g, r, i, or z) |