Daily Image
09-11-2022
Apertif imaging data release papers are published by A&A
| Submitter: | Alexander Kutkn |
| Description: | Three papers dedicated to the first Apertif imaging data release (DR1) are now published in A&A, Vol 667. Congratulations to the team! The paper by Adams et al. (arXiv:2208.05348) provides description of the data products, the validation procedures and the accessibility details. The one by Dénes et al. (arXiv:2205.09662) describes the properties of the primary beams of Apertif. The paper by Kutkin et al. (arXiv:2208.05342) presents the continuum catalog compiled from DR1 images. The Apertif data has increased sensitivity and resolution compared to previous benchmark survey at the same frequency, NVSS. This has resulted in the new detection of thousands of radio sources, which are an important asset to observational astrophysics. Moreover, cross-matching of Apertif and NVSS catalogs allows studying long-term variability of radio sources and detecting transients. The common sky area and comparable angular resolution of Apertif and LOFAR surveys provide information about radio spectra of the sources, their morphology and evolution. The image shows a radio galaxy as seen by Apertif (upper left), NVSS (upper right) and LOFAR (lower left), so one can visually compare resolution and sensitivity of the surveys. The spectral index map calculated between Apertif and LOFAR images is shown in the lower right panel. When the reduction of the Apertif survey data is completed we are looking forward to applying the methods and techniques described in the papers for the future data releases. We are also working on upgrading the calibration and imaging pipeline to achieve a better quality of the Apertif data products. |
| Copyright: | Free |
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