Dataset 20200310

Data version: 20200310 (included all ALMA data in COSMOS being public before date 2020-03-10)

Number of pointings: 2840 (beam_maj > 0.1 arcsec in COSMOS)

Number of ALMA projects: 128

Data Release:

https://drive.google.com/drive/folders/1GBkEdS9H7WGP1N2QYBMjPNcCD09SbXqr?usp=sharing

• Two photometry catalogs:

  • The blind photometry catalog A-COSMOS_blind*.fits contains blindly extract ALMA sources with peak flux to rms ratio (S/N peak) greater than 5.40, which corresponds to a ~50% spurious fraction at that S/N and a ~12% cumulative spurious fraction for such a sample selection.

  • The prior photometry catalog A-COSMOS_prior*.fits contains prior fitting of known optical/near-infrared/mid-infrared/radio sources in our COSMOS Master Catalog with S/N peak greater than 4.35, which also corresponds to a ~50% spurious fraction at that S/N and a ~8% cumulative spurious fraction for such a sample selection.

• One galaxy property catalog:

  • The galaxy catalog datatable_ID_RA_Dec_z_Mstar_SFR_sSFR_with_deltaGas.fits contains only robustly detected galaxies with optical/near-infrared detections, so that each galaxy has a reasonably constrained, consistently fitted stellar mass, star formation rate and redshift. It now also contains more columns including the molecular gas masses computed using the Hughes+2017 calibration ('Mgas' column) and other calibration methods.

• And some other files:

  • The catalog datatable_ID_RA_Dec_z_Mstar_SFR_sSFR_with_SED_fluxes_FIXED_FOBS_FSED_BUG.fits contains one or multiple ALMA fluxes for each galaxy. FOBS and FSED are the observed and SED predicted fluxes at each ALMA wavelength. Note that in our previous internally distributed version of this catalog has a bug that FOBS and FSED are swapped. It does not affect public catalogs. This catalog is now also made available for anyone interested to use. It's a derivative of the prior photometry catalog, and is useful for SED fitting.

  • Meta tables in FITS format for our ALMA images. This is useful to check whether a source is in the spatial coverage of our dataset.

  • Our A3COSMOS Master Catalog, combining optical, near-IR, sub-mm and radio catalogs so as to identify unique sources for our prior-position-based photometry.

• Notes:

  • The column names may be slightly different from our published ones, just let us know if you have any question.

There are a number of other very useful data:

Continuum images will be released soon at the COSMOS IRSA website: https://irsa.ipac.caltech.edu/data/COSMOS/overview.html or https://irsa.ipac.caltech.edu/data/COSMOS/images/a3cosmos/ (depending on IRSA schedule)

Galaxy SEDs (optical-to-mm-radio) are available upon request.

The dust and dust-inferred molecular gas mass of each galaxy in the robust galaxy catalog are available upon request.

In addition, after the setup of the COSMOS IRSA repository, we will release a Python package to easily make cutouts and query sources.