Planck Early Release Compact Source Catalog

About ECC

Early Cold Core source list (ECC)

The Planck ECC is a catalog of Galactic cold cores, i.e., compact cloud cores with color temperatures below 14K. These are pre-stellar objects before or at the very initial stages of the protostellar collapse, or possibly more evolved sources that still contain significant amounts of cold dust. The cores are located using Planck data at 350, 550, and 850 μm and far-infrared 100 μm data from the IRAS survey. Aperture photometry is performed using a source radius of 5 arcmin and a background annulus spanning radii from 5 to 10 arcmin. The flux densities and flux density errors generated by the four-band aperture photometry are used in an unconstrained three-parameter (T, β, and S(857 GHz)) greybody fit.

Planck ECC Data Column Descriptions

Name Intype Units Description
NAME char Source name
SNR double Signal-to-noise ratio of detection
GLON double deg Galactic longitude
GLAT double deg Galactic latitude
RA double deg Right ascension (J2000)
DEC double deg Declination (J2000)
APFLUX353 double mJy Aperture flux density at 353 GHz
APFLUX545 double mJy Aperture flux density at 545 GHz
APFLUX857 double mJy Aperture flux density at 857 GHz
APFLUX3000 double mJy Aperture flux density at 100 micron (3000GHz) from IRAS
APFLUX353_ERR double mJy Uncertainty (1 sigma) in aperture flux density at 353 GHz
APFLUX545_ERR double mJy Uncertainty (1 sigma) in aperture flux density at 545 GHz
APFLUX857_ERR double mJy Uncertainty (1 sigma) in aperture flux density at 857 GHz
APFLUX3000_ERR double mJy Uncertainty (1 sigma) in APFLUX3000
TEMPERATURE double K Temperature from greybody fit
BETA double Emissivity index from greybody fit
S857 double mJy Flux density at 857 GHz from greybody fit
TEMPERATURE_ERR double K Uncertainty (1 sigma) in temperature from greybody fit
BETA_ERR double Uncertainty (1 sigma) in emissivity index from greybody fit
S857_ERR double mJy Uncertainty (1 sigma) in flux density at 857 GHz from greybody fit
BESTNORM double mJy^2 Summed squared residuals for best greybody fit
TEMPERATURE_CORE double K Core temperature from greybody fit on cold residual
BETA_CORE double Core emissivity index from greybody fit on cold residual
MAJ_AXIS_FWHM_CORE double arcmin Ellipse major axis of cold residual
MIN_AXIS_FWHM_CORE double arcmin Ellipse minor axis of cold residual
TEMPERATURE_CORE_ERR double K Uncertainty (1 sigma) in core temperature from greybody fit
BETA_CORE_ERR double Uncertainty (1 sigma) in core emissivity index from greybody fit
MAJ_AXIS_FWHM_CORE_ERR double arcmin Uncertainty (1 sigma) of ellipse major axis of cold residual
MIN_AXIS_FWHM_CORE_ERR double arcmin Uncertainty (1 sigma) of ellipse minor axis of cold residual