AMI observations of unmatched Planck ERCSC LFI sources at 15.75 GHz

TL;DR

This study used the AMI SA at 15.75 GHz to observe unmatched sources from the Planck ERCSC, confirming some as known objects and suggesting others are likely spurious detections.

Contribution

First observational follow-up of unmatched Planck ERCSC sources at 15.75 GHz, clarifying their nature and reliability.

Findings

Four sources detected and associated with known objects.

Four sources not detected, likely spurious.

Supports the reliability of some Planck detections.

Abstract

The Planck Early Release Compact Source Catalogue includes 26 sources with no obvious matches in other radio catalogues (of primarily extragalactic sources). Here we present observations made with the Arcminute Microkelvin Imager Small Array (AMI SA) at 15.75 GHz of the eight of the unmatched sources at declination > +10 degrees. Of the eight, four are detected and are associated with known objects. The other four are not detected with the AMI SA, and are thought to be spurious.