We present below updated, full Stokes, measurements of the MeerKAT L-band gain calibrators. Observations were conducted in August 2019 (RA range 11–23 hours) and August 2020 (RA range 00-11 hours). Please consult this memo for further details of the observations and processing. Full imaging products are available as a data release in the SARAO repository.
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the flux density at 1400 MHz (S1.4GHz), from a power-law fit the to the Stokes I spectrum.
the in-band spectral index from the power-law fit to the Stokes I spectrum (Alpha). Errors are the formal error on the fit parameter from the covariance matrix.
a URL link to the peak Stokes I spectrum plot where flux values are the brightest pixels taken from the FITS cube.
the degree of polarized intensity and position angle at 1400 MHz (p_1.4, PA_1.4) measured as the average value of polarised intensity and polarization angle over the channels within +/- 20 MHz of 1400 MHz. The errors are the standard error on the mean derived from the RMS of the N values over the frequency interval divided by square-root(N).
the spectral index of polarized intensity (Beta) from a power-law fit to the spectrum of polarized intensity. Errors are the formal error on the fit parameter from the covariance matrix.
the Faraday depth of the dominant RM synthesis component with error.
the amplitude (polarized intensity) of the dominant RM synthesis component.
the median value of the fractional Stokes v=V/I over the band. The error is the standard error on the mean derived from the RMS of the values over the band.
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