J/MNRAS/547/G285 Deblended MIGHTEE-COSMOS radio catalogues (Malefahlo+, 2026)
Deblending the MIGHTEE-COSMOS survey with XID+:
the resolved radio source counts to S1.4 ∼ 5 uJy.
Malefahlo E., Jarvis M.J., Santos M.G., Cress C., Smith D.J.B., Hale C.L.,
Afonso J., Whittam I.H., Vaccari M., Heywood I., Jin S., An F.
<Mon. Not. R. Astron. Soc. 547, G285 (2026)>
=2026MNRAS.547ag285M (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Radio sources ; Photometry
Keywords: methods: data analysis - methods: statistical - surveys -
galaxies: statistics - radio continuum: galaxies
Abstract:
Deep radio continuum surveys provide fundamental constraints on galaxy
evolution, but source confusion limits sensitivity to the faintest
sources. We present a complete framework for producing high-fidelity
deblended radio catalogues from the confused MIGHTEE maps using the
probabilistic deblending framework XID+ and prior positions from deep
multi-wavelength data in the COSMOS field. Applied to the ∼1.3deg2
area of the MIGHTEE-COSMOS field, this procedure yields a deblended
catalogue of 89,562 sources. We also define a recommended
high-fidelity sample of 20757 sources, based on detection
significance, flux density, and goodness-of-fit.
Description:
The deblended radio source catalogues for the MIGHTEE-COSMOS field.
Table 1 contains the "Radio-Likely" prior catalogue (89562 sources),
which is the primary high-purity sample used for the main analysis.
Table 2 contains the "Comprehensive" prior catalogue (298894
sources), which is the more inclusive but lower-purity sample
described in Appendix C.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 178 89562 The Radio-Likely deblended catalogue
tablee2.dat 178 298894 The Comprehensive deblended catalogue
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See also:
J/ApJS/258/11 : The COSMOS2020 catalog (Weaver+, 2022)
Byte-by-byte Description of file: tablee1.dat tablee2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- FarmerID COSMOS2020 FARMER Identification number,
NNN_NNNN (FARMER_ID)
10- 27 F18.14 deg RAdeg Right Ascension (J2000) from COSMOS2020
(RA)
29- 46 F18.16 deg DEdeg Declination (J2000) from COSMOS2020 (Dec)
48- 63 E16.8 mJy Fluxmed MIGHTEE 1.3GHz flux density (median)
(Flux_med)
65- 80 E16.8 mJy E_Fluxmed MIGHTEE 1.3GHz flux density
(84th percentile) (FluxErru)
82- 97 E16.8 mJy e_Fluxmed MIGHTEE 1.3GHz flux density
(16th percentile) (FluxErrl)
99-114 E16.8 mJy FluxMaxLik MIGHTEE 1.3GHz flux density
(Maximum Likelihood) (FluxMaxLik)
116-131 E16.8 mJy FluxMAP-KDE MIGHTEE 1.3GHz flux density
(Marginal MAP from KDE) (FluxMAPKDE)
133-147 E15.7 mJy/beam Bkg Fitted background of MIGHTEE 1.3GHz map
(median) (Bkg)
149-159 F11.8 --- Rhat Convergence statistic (ideally < 1.2)
(Rhat)
161-172 F12.7 --- Neff Number of effective samples (ideally > 40)
(n_eff)
174-178 F5.3 --- Pval-res Bayesian p-value residual statistic
(ideally < 0.6) (Pval_res)
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Acknowledgements:
Eliab Malefahlo, eliabmalefahlo3(at)gmail.com
(End) Patricia Vannier [CDS] 09-Feb-2026