VLA imaging of the XMM-LSS/VIDEO deep field at 1–2 GHz

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dc.contributor.authorJarvis, M
dc.contributor.authorHeywood, I
dc.contributor.authorHale, C
dc.date.accessioned2021-02-10T14:50:25Z
dc.date.available2021-02-10T14:50:25Z
dc.date.issued2020-06-20
dc.description.abstractModern radio telescopes are routinely reaching depths where normal star-forming galaxies are the dominant observed population. Realizing the potential of radio as a tracer of star formation and black hole activity over cosmic time involves achieving such depths over representative volumes, with radio forming part of a larger multiwavelength campaign. In pursuit of this, we used the Karl G. Jansky Very Large Array (VLA) to image ∼5 deg2 of the VIDEO/XMM-LSS extragalactic deep field at 1–2 GHz. We achieve a median depth of 16 μJy beam−1 with an angular resolution of 4.5 arcsec. Comparisons with existing radio observations of XMM-LSS showcase the improved survey speed of the upgraded VLA: we cover 2.5 times the area and increase the depth by ∼20 per cent in 40 per cent of the time. Direction-dependent calibration and wide-field imaging were required to suppress the error patterns from off-axis sources of even modest brightness. We derive a catalogue containing 5762 sources from the final mosaic. Sub-band imaging provides in-band spectral indices for 3458 (60 per cent) sources, with the average spectrum becoming flatter than the canonical synchrotron slope below 1 mJy. Positional and flux density accuracy of the observations, and the differential source counts are in excellent agreement with those of existing measurements. A public release of the images and catalogue accompanies this article.en_US
dc.identifier.citationJarvis, M; et al. 2020. VLA imaging of the XMM-LSS/VIDEO deep field at 1–2 GHz. Monthly Notices of the Royal Astronomical Society. 496(3):3469-3481en_US
dc.identifier.urihttp://doi.org/10.1093/mnras/staa1770
dc.identifier.urihttp://hdl.handle.net/10566/5891
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectradio continuumen_US
dc.subjecttechniques: interferometricen_US
dc.subjectgalaxiesen_US
dc.titleVLA imaging of the XMM-LSS/VIDEO deep field at 1–2 GHzen_US
dc.typeArticleen_US

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