AMI Galactic Plane Survey at 16 GHz: II -- Full data release with extended coverage and improved processing

TL;DR

This paper presents the second data release of the AMIGPS, expanding sky coverage, including new regions, and enhancing data processing for better accuracy in a high-frequency Galactic plane survey.

Contribution

The paper provides an extended data release with improved processing techniques, covering more sky area and including additional astrophysical regions and sources.

Findings

Coverage extended to 1777 deg²

Catalogue contains 6509 sources

Improved positional and flux density accuracy

Abstract

The Arcminute Microkelvin Imager Galactic Plane Survey (AMIGPS) provides mJy-sensitivity, arcminute-resolution interferometric images of the northern Galactic plane at $\approx$ 16 GHz. The first data release covered $76^{\circ} \lessapprox \ell \lessapprox 170^{\circ}$ between latitudes of $|b| \lessapprox 5^{\circ}$; here we present a second data release, extending the coverage to $53^{\circ} \lessapprox \ell \lessapprox 193^{\circ}$ and including high-latitude extensions to cover the Taurus and California giant molecular cloud regions, and the recently discovered large supernova remnant G159.6+7.3. The total coverage is now 1777 deg$^2$ and the catalogue contains 6509 sources. We also describe the improvements to the data processing pipeline which improves the positional and flux density accuracies of the survey.