Deep low-frequency radio observations of the NOAO Bo?tes field - I. Data reduction and catalog construction

摘要

In this article we present deep, high-resolution radio interferometric observations at 153?MHz to complement the extensively studied NOAO Bo?tes field. We provide a description of the observations, data reduction and source catalog construction. From our single pointing GMRT observation of ?~12?h we obtain a high-resolution (26″?×?22″) image of ?~11.3?square degrees, fully covering the Bo?tes field region and beyond. The image has a central noise level of ?~1.0?mJy?beam-1, which rises to 2.0–2.5?mJy?beam-1 at the field edge, placing it amongst the deepest ?~150?MHz surveys to date. The catalog of 598?extracted sources is estimated to be ?~92?percent complete for ?>?10?mJy sources, while the estimated contamination with false detections is ?