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

This is Data Release 1 (DR1) from the MIGHTEE-HI survey, covering ~4 square degrees of the COSMOS extragalactic deep field via a 15 pointing mosaic. Spectral line cubes are provided in two sub-bands, L1 (960–1150 MHz, 104.4 kHz channel width) and L2 (1290–1520 MHz, 26.1 kHz channel width). The L2 sub-band is split into several sub-cubes with 55 channel overlaps. Keywords in the FITS file names have the following meanings: - dirty: The constituent images are mosiacked with their normal point spread function. - conv: The resolution of the constituent images has been homogenised prior to mosaicking. - clean: Spectral line emission has been located down to a reliable threshold, and deconvolved. - contsub: An image-domain continuum subtraction process has been applied to the spectrum associated with each spatial pixel. Please refer to the paper for full details. Please cite the associated paper if you make use of these products.