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MIGHTEE: multi-wavelength counterparts in the COSMOS field

Whittam, I.H.; Prescott, M.; Hale, C.L.; Jarvis, M .J.; Heywood, I.; An, Fangxia; Glowacki, M.; Maddox, N.; Marchetti, L.; Morabito, Leah; Adams, N.J.; Bowler, R.A.A.; Hatfield, P.W.; Varadaraj, R.G.; Collier, J.; Frank, B.; Taylor, A.R.; Santos, M.G.; Vaccari, M.; Afonso, J.; Ao, Y.; Delhaize, J.; Knowles, K.; Kolwa, S.; Randriamampandry, S.M.; Randriamanakoto, Z.; Smirnov, O.; Smith, D.J.B.; White, S.V.

MIGHTEE: multi-wavelength counterparts in the COSMOS field Thumbnail


I.H. Whittam

M. Prescott

C.L. Hale

M .J. Jarvis

I. Heywood

Fangxia An

M. Glowacki

N. Maddox

L. Marchetti

N.J. Adams

R.A.A. Bowler

P.W. Hatfield

R.G. Varadaraj

J. Collier

B. Frank

A.R. Taylor

M.G. Santos

M. Vaccari

J. Afonso

Y. Ao

J. Delhaize

K. Knowles

S.M. Randriamampandry

Z. Randriamanakoto

O. Smirnov

D.J.B. Smith

S.V. White


In this paper we combine the Early Science radio continuum data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey, with optical and near-infrared data and release the cross-matched catalogues. The radio data used in this work covers 0.86 deg2 of the COSMOS field, reaches a thermal noise of 1.7 μJy/beam and contains 6102 radio components. We visually inspect and cross-match the radio sample with optical and near-infrared data from the Hyper Suprime-Cam (HSC) and UltraVISTA surveys. This allows the properties of active galactic nuclei and star-forming populations of galaxies to be probed out to z≈5. Additionally, we use the likelihood ratio method to automatically cross-match the radio and optical catalogues and compare this to the visually cross-matched catalogue. We find that 94 per cent of our radio source catalogue can be matched with this method, with a reliability of 95 per cent. We proceed to show that visual classification will still remain an essential process for the cross-matching of complex and extended radio sources. In the near future, the MIGHTEE survey will be expanded in area to cover a total of ∼20~deg2; thus the combination of automated and visual identification will be critical. We compare redshift distribution of SFG and AGN to the SKADS and T-RECS simulations and find more AGN than predicted at z∼1.


Whittam, I., Prescott, M., Hale, C., Jarvis, M. .., Heywood, I., An, F., …White, S. (2024). MIGHTEE: multi-wavelength counterparts in the COSMOS field. Monthly Notices of the Royal Astronomical Society, 527(2), 3231-3245.

Journal Article Type Article
Acceptance Date Oct 30, 2023
Online Publication Date Oct 31, 2023
Publication Date 2024-01
Deposit Date Nov 2, 2023
Publicly Available Date Jan 24, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 527
Issue 2
Pages 3231-3245
Public URL
Publisher URL
Additional Information A correction has been published: Monthly Notices of the Royal Astronomical Society, Volume 528, Issue 2, February 2024, Page 1171,


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