Daily Image
14-06-2023
New data release of Apertif
| Submitter: | Alexander Kutkn |
| Description: | We released a continuum mosaic image of a 26.5 square degrees region in the Boötes constellation obtained with Apertif at 1.4 GHz. We used a newly developed processing pipeline that includes direction-dependent self-calibration, which provides a significant improvement in the quality of the images compared to those released as part of the Apertif first data release. For the Boötes region, we mosaicked 187 Apertif images and extracted a source catalog. The mosaic image has an angular resolution of 27x11" and a median background noise of 40 uJy/beam. The catalog has 9000 sources and is complete down to the 0.3 mJy level. We combined the Apertif image with LOFAR images of the Boötes field at 54 and 150 MHz to study the spectral properties of the sources. The image shows some radio sources as seen by LOFAR and Apertif. The paper describing the release has been accepted for publication in Astronomy & Astrophysics, and has been uploaded to ArXiv: https://arxiv.org/abs/2306.03710. |
| Copyright: | Free |
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