Cassata Morphology Catalog v1.1 Definitions
COSMOS Overview
The COSMOS Archive serves data taken for the Cosmic Evolution Survey (COSMOS) project. COSMOS is an astronomical survey designed to probe the formation and evolution of galaxies as a function of cosmic time (redshift) and large scale structural environment. The survey covers a 2 square degree equatorial field with imaging by most of the major space-based telescopes (Hubble, Spitzer, GALEX, XMM, Chandra) and a number of large ground based telescopes (Subaru, VLA, ESO-VLT, UKIRT, NOAO, CFHT, and others).
IRSA serves the COSMOS archive using the following search methods:
- Spatial search on all images and small catalogs, using Atlas
- Advanced search on only the larger catalogs, using Gator
Cassata Morphology Catalog v1.1 Column Definitions
Gator serves the Cassata Morphology Catalog v1.1 (18 columns [13 delivered + 5 IRSA-created], 232,022 data rows). The column descriptions can be found below.
| Column Name | Data Type | Units | Description |
| ID | int | Identification number | |
| RA | float | degrees | Right ascension |
| DEC | float | degrees | Declination |
| MAG_AUTO_ACS | float | mag | Auto magnitutde |
| R_PETRO | float | pixels | Petrosian radius |
| R_HALF | float | pixels | Half light radius |
| CONC_PETRO | float | Petrosian concentration | |
| ASYMMETRY | float | Asymmetry | |
| GINI | float | Gini coefficient | |
| M20 | float | M20 | |
| AxialRatio | float | Ratio of minor to major axis | |
| AUTOCLASS | int | Class | |
| CLASSWEIGHT | float | Weight |