MIGHTEE-HI: deep spectral line observations of the COSMOS field

Deep spectral line cubes of the COSMOS field in two sub-bands, L1 (960–1150 MHz, 104.4 kHz channel width) and L2 (1290–1520 MHz, 26.1 kHz channel width)

This release includes the MIGHTEE-HI imaging products covering ~4 square degrees of the COSMOS field. The cubes are produced using a total of 94.2 h on-target and a close-packed mosaic of 15 individual pointings. The spectral imaging covers two broad, relatively interference-free regions (960-1150 and 1290-1520~MHz) within MeerKAT's L-band, with up to 26 kHz spectral resolution (5.5 km s−1 at z = 0).

Contributors: I. Heywood, A. A. Ponomareva, N. Maddox, M. J. Jarvis, B. S. Frank, E. A. K. Adams, M. Baes, A. Bianchetti, J. D. Collier, R. P. Deane, M. Glowacki, S. L. Jung, H. Pan, S. H. A. Rajohnson , G. Rodighiero, I. Ruffa, M. G. Santos, F. Sinigaglia and M. Vaccari

Paper: https://arxiv.org/abs/2409.17713

DOI: https://doi.org/10.48479/jkc0-g916

Keywords in the FITS filenames:

conv: The resolution of the constituent images has been homogenised prior to mosaicking.

contsub: An image-domain continuum subtraction process has been applied to the spectrum associated with each spatial pixel.

clean: Spectral line emission has been located down to a reliable threshold, and deconvolved.

dirty: The constituent images are mosiacked with their normal point spread function.

MIGHTEE-HI Data products

This data was published on 11 November 2024