C2D Overview

IRSA provides access to data from the final delivery (DR4, Fall 2006 and Fall 2007) of the Spitzer Space Telescope "From Molecular Cores to Planet-Forming Disks" (c2d) Legacy Project. The data are also available as Enhanced Products from the Spitzer Science Center (SSC).

c2d has delivered 867 catalogs. IRSA has merged these delivered catalogs into four groups - Clouds, Off-Cloud, Cores, Stars - and serves them through the general catalog search engine Gator. Many of the delivered catalogs, images and spectra are accessible through IRSA's general search service, Atlas. A summary of the catalogs types and how to access them is as follows:

Catalog Name	Content	Gator Access (merged)	Atlas Access (as delivered)
FULL	Complete source lists (Section 3.2 of c2d data delivery document [ps | pdf])	Y	Y
HREL	Derived from the full catalogs are high reliability catalogs (Section 3.2.1 [ps | pdf])	Y	Y
YSOc	Derived from the full catalogs are young stellar object candidates (Section 3.2.2 [ps | pdf])	Y	Y
MM	Millimeter wavelength source lists (Section 3.2.3 [ps | pdf])	Y	Y
Transients	Catalogs of transients in two epochs (Section 3.2.4 [ps | pdf])	Y	N
resampled-SWIRE	Resampled sources in the ELAIS N1 field measured by the SWIRE Legacy Project, that have been used to study c2d background contamination (Section 3.8 [ps | pdf])	N (see footnote 1 for download information) 1	N (see footnote 1 for download information) 1

¹ resampled-SWIRE catalogs can be downloaded in their entirety per cloud (CHA_II, LUP, OPH, PER, and SER).

The data are also available for direct download as follows: images and associated catalogs are organized according to object type - CORES or STARS - or the names of 5 major CLOUDS - ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER); IRS spectra and MIPS SED's are organized by object name.

C2D Millimeter Source Catalog Definitions

Gator serves one C2D Millimeter Source merged catalog, created by IRSA. The data comes from catalog-OPH-mmsources.tbl, catalog-PER-mmsources.tbl and catalog-SER-mmsources.tbl files. The "region" column in the merged indicates which Cloud the data originated from: OPH, PER or SER.

Please refer to the data delivery documentation for further information. The column descriptions can be found below.

name	intype	units	description
region	char		Region or cloud from which this catalog was drawn. Please see section above for the derivation of region column values. All possible region string values in the merged MM catalog are "OPH", "PER" and "SER".
Bolo_ID	char		Bolocam source name
RA	float	degree	Right Ascension [J2000]
Dec	float	degree	Declination [J2000]
Peak_flux	float	Jy_per_beam	Peak flux density per beam
D_Peak_flux	float	Jy_per_beam	Uncertainty in Peak_flux
S_N	float		Signal-to-noise ratio of Peak_flux
Flux_40asec	float	Jy	Integrated flux density in 40-arcsec diameter aperture
D_Flux_40asec	float	Jy	Uncertainty in Flux_40asec
Flux_80asec	float	Jy	Integrated flux density in 80-arcsec diameter aperture
D_Flux_80asec	float	Jy	Uncertainty in Flux_80asec
Flux_120asec	float	Jy	Integrated flux density in 120-arcsec diameter aperture
D_Flux_120asec	float	Jy	Uncertainty in Flux_120asec
Total_flux	float	Jy	Total integrated flux
D_Total_flux	float	Jy	Uncertainty in Total_flux
FWHM_minor	float	arcsec	FWHM along source minor axis
D_FWHM_minor	float	arcsec	Uncertainty in FWHM_minor
FWHM_major	float	arcsec	FWHM along source major axis
D_FWHM_major	float	arcsec	Uncertainty in FWHM_major
PA	int	degree	Position angle
D_PA	int	degree	Uncertainty in PA
Mass_10K	float	M_sun	Total isothermal mass for T=10K
D_Mass_10K	float	M_sun	Uncertainty in Mass_10K
Peak_Av	int	magnitudes	Visual extinction calculated from Peak_flux
mean_density	char	per_cubic_cm	Mean particle density (assuming spherical source)
Morphology	char		Description of source shape and environment
Spitzer_YSO	char		Association with one (yes) or more (multiple) c2d YSO(s)
SSTc2d_ID	char		c2d source name of nearest YSO