The MeerKLASS UHF On-the-Fly Continuum Survey -- Data Release I
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915672766808064 |
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| author | Paul, Sourabh Grainge, Keith Santos, Mario G. Chatterjee, Suman Mangla, Sarvesh Wolz, Laura Mohr, Joseph J. Smirnov, Oleg Tasse, Cyril Rozgonyi, Kristof Hoeft, Matthias Perrott, Yvette |
| author_facet | Paul, Sourabh Grainge, Keith Santos, Mario G. Chatterjee, Suman Mangla, Sarvesh Wolz, Laura Mohr, Joseph J. Smirnov, Oleg Tasse, Cyril Rozgonyi, Kristof Hoeft, Matthias Perrott, Yvette |
| contents | We present the first public data release (DR1) from the interferometric component of the MeerKAT Large Area Synoptic Survey (MeerKLASS) UHF survey, a legacy program demonstrating a novel on-the-fly (OTF) mapping technique. This release is based on 12 hours of early science observations covering approximately 800 deg$^2$ of the southern sky. We describe the data processing pipeline developed to calibrate and image these fast-scanning observations, producing high-fidelity continuum images at a central frequency of 816 MHz. The resulting mosaic reaches an RMS sensitivity of $\sim$35 $μ$Jy beam$^{-1}$ in its deepest regions, with a typical angular resolution of $\sim32'' \times 17''$. In these images, we identify $95483$ radio sources. We validate the catalogue through cross-matching with external surveys, confirming sub-arcsecond astrometric accuracy and a robust flux density scale. We compute the differential source counts, finding excellent agreement with existing measurements and validating our end-to-end processing. The success of this pilot study serves as a crucial proof of concept for the OTF observing strategy, and the public release of the images and source catalogue provides a valuable resource for a wide range of astrophysical studies. This work paves the way for the full MeerKLASS OTF survey and future large-area survey projects with the SKA. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_11964 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The MeerKLASS UHF On-the-Fly Continuum Survey -- Data Release I Paul, Sourabh Grainge, Keith Santos, Mario G. Chatterjee, Suman Mangla, Sarvesh Wolz, Laura Mohr, Joseph J. Smirnov, Oleg Tasse, Cyril Rozgonyi, Kristof Hoeft, Matthias Perrott, Yvette Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics We present the first public data release (DR1) from the interferometric component of the MeerKAT Large Area Synoptic Survey (MeerKLASS) UHF survey, a legacy program demonstrating a novel on-the-fly (OTF) mapping technique. This release is based on 12 hours of early science observations covering approximately 800 deg$^2$ of the southern sky. We describe the data processing pipeline developed to calibrate and image these fast-scanning observations, producing high-fidelity continuum images at a central frequency of 816 MHz. The resulting mosaic reaches an RMS sensitivity of $\sim$35 $μ$Jy beam$^{-1}$ in its deepest regions, with a typical angular resolution of $\sim32'' \times 17''$. In these images, we identify $95483$ radio sources. We validate the catalogue through cross-matching with external surveys, confirming sub-arcsecond astrometric accuracy and a robust flux density scale. We compute the differential source counts, finding excellent agreement with existing measurements and validating our end-to-end processing. The success of this pilot study serves as a crucial proof of concept for the OTF observing strategy, and the public release of the images and source catalogue provides a valuable resource for a wide range of astrophysical studies. This work paves the way for the full MeerKLASS OTF survey and future large-area survey projects with the SKA. |
| title | The MeerKLASS UHF On-the-Fly Continuum Survey -- Data Release I |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2512.11964 |