Atacama Cosmology Telescope: Dusty star-forming galaxies and active galactic nuclei in the equatorial survey

Understand

We present a catalog of 510 radio-loud active galactic nuclei (AGN, primarily blazars) and 287 dusty star-forming galaxies (DSFGs) detected by the Atacama Cosmology Telescope at $>5\sigma$ significance in bands centered on 148 GHz (2 mm), 218 GHz (1.4 mm) and 277 GHz (1.1 mm), from a 480 square degrees strip on the celestial equator with additional (360 square degrees) shallower fields.

• Combining the deepest available 218 GHz wide-field imaging, 277 GHz data, and multi-band filtering yields the most sensitive wide-field millimeter-wave DSFG selection to date with rms noise referenced to 218 GHz reaching $<2$ mJy.
• We developed techniques to remove Galactic contamination from the extragalactic catalog, yielding 321 additional Galactic sources.
• We employ a new flux debiasing method that handles the heterogeneous sample selection due to Galactic cuts.