Complete IRAC mapping of the CFHTLS-DEEP, MUSYC AND NMBS-II FIELDS

TL;DR

This paper presents the IRAC mapping of several deep survey fields, combining new observations with archival data to produce deep, well-registered infrared images covering about 3 square degrees, and makes these data publicly available.

Contribution

It provides detailed data reduction techniques and coverage maps for IRAC imaging of multiple deep survey fields, integrating new and archival data into comprehensive mosaics.

Findings

Coverage maps at 3.6 and 4.5 μm are publicly available.

Images are W-registered to high-quality reference images.

The combined data covers about 3 square degrees with deep integration.

Abstract

The IRAC mapping of the NMBS-II fields program is an imaging survey at 3.6 and 4.5$\mu$m with the Spitzer Infrared Array Camera (IRAC). The observations cover three Canada-France-Hawaii Telescope Legacy Survey Deep (CFHTLS-D) fields, including one also imaged by AEGIS, and two MUSYC fields. These are then combined with archival data from all previous programs into deep mosaics. The resulting imaging covers a combined area of about 3 $deg^2$, with at least $\sim$2 hr integration time for each field. In this work, we present our data reduction techniques and document the resulting coverage maps at 3.6 and 4.5$\mu$m. All of the images are W-registered to the reference image, which is either the z-band stack image of the 25\% best seeing images from the CFHTLS-D for CFHTLS-D1, CFHTLS-D3, and CFHTLS-D4, or the K-band images obtained at the Blanco 4-m telescope at CTIO for MUSYC1030 and MUSYC1255. We make all images and coverage maps described herein publicly available via the Spitzer Science Center.