| artss15 | ARTSS1-5 X-ray Source Catalog |
| coord_equatorial | Equatorial Hammer Coordinate System |
| coord_galactic | Galactic Hammer Coordinate System |
| equator | Celestial equator is the great circle with declination equal to 0 deg. |
| scale_eq_dec | Equatorial declination scale settings |
| scale_eq_ra | Equatorial right-ascension scale settings |
| scale_gal_lat | Galactic latitude scale settings |
| scale_gal_lon | Galactic longitude scale settings |