Table 4
Coefficients used for the polynomial fits for the calibrators 3C286, 3C138, and 3C48.
| Source | an1 | an2 | an3 | an4 | UV restric |
|---|---|---|---|---|---|
| 3C286 | 1.2515 | −0.4605 | −0.1715 | 0.0336 | <400kλ |
| Range [GHz] | νc [GHz] | χCoeff | pCoeff | ||
| 1.0–50.0 | 25.5 | 0.62, 0.06, −0.06, −0.21, 0.16, 0.47, −0.17, −0.37 | 0.13, 0.004, 0.02, 0.09, −0.13, −0.34, 0.19, 0.37 | ||
| Source | an1 | an2 | an3 | an4 | UV restric |
| 3C138 | 1.0332 | −0.5608 | −0.1197 | 0.0410 | <40kλ |
| Range [GHz] | νc [GHz] | χCoeff | pCoeff | ||
| 1.0–19.0 | 10.0 | −0.13, 0.18, −0.41, −0.58, 1.08, 0.18, −0.92, 0.33 | 0.10, −0.04, −0.10, 0.10, 0.30, −0.29, −0.30, 0.29 | ||
| 19.0–50.0 | 34.5 | −0.41, −0.29, 0.23 | 0.07, −0.003, −0.01 | ||
| Source | an1 | an2 | an3 | an4 | UV restric |
| 3C48 | 1.3324 | −0.7690 | −0.1950 | 0.0590 | <20kλ |
| Range [GHz] | νc [GHz] | χCoeff | pCoeff | ||
| 1.0–2.0 | 1.5 | −3.66, 5.066, −6.37, 3.59 | 0.0056, 0.010, 0.0049, −0.00066 | ||
| 2.0–19.0 | 10.5 | −1.05, 0.07, −1.05, 0.61, 3.58, −2.76, −5.90, 5.60 | 0.06, 0.01, 0.03, −0.01, −0.16, 0.17, 0.12, −0.15 | ||
| 19.0–50.0 | 34.5 | −1.34, −0.46, −0.21 | 0.08, −0.01, −0.04 | ||
Notes. The ani are the coefficients taken from Perley & Butler (2013a) to determine the Stokes I behavior. The νc [GHz] is the central frequency used for the determination of the polynomial functions for the polarized data; the χCoeff [rad] are the coefficients used for the parametrization of the polarization angle and the pCoeff are the coefficients used for the parametrization of the fractional polarization. UV restrict is a restriction in the UV plane, as suggested by NRAO.
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