Assessing the impact of two independent direction-dependent calibration algorithms on the LOFAR 21 cm signal power spectrum - And applications to an observation of a field flanking the north celestial pole

Open Access

Table 2

Parameter set-up for the multiscale deconvolution algorithm with WSCLEAN.

Parameter	Value
Pixel scale	6 arcsec
Briggs weighting	0.0
Baselines	<10000λ
Fitting spectra^(*)	3 terms
Auto mask	7σ
Final threshold	3σ

Notes. ^(*)WSCLEAN has an option to enforce a smooth spectrum during joined channel deconvolution by fitting a polynomial. In this work, we fit a polynomial with three terms (i.e. a second-order polynomial) to achieve a smooth spectrum.

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