Table 1.
Properties of the three lensed images of PKS 1830−211 from the ALMA 2019 data.
Image | RA offset | Dec offset | Flux density at 300 GHz | Flux normalized | Spectral index |
---|---|---|---|---|---|
(mas) | (mas) | (mJy) | to image A | α | |
A | 0.0 | 0.0 | 1776 ± 36 | 1.0 | −0.698 ± 0.045 |
B | −641.946 ± 0.042 | −728.082 ± 0.033 | 1658 ± 165 | 0.93 ± 0.09 | −0.79 ± 0.21 |
C | −500.1 ± 2.1 | −459.6 ± 1.6 | 12.6 ± 1.6 | 0.0071 ± 0.0009 | −0.53 ± 0.28 |
Notes. Flux densities come from the global fit of the spectral index, see Fig. 2. The uncertainties do not take into account ∼10% uncertainty on the absolute flux calibration, but carry intrinsic source variability, with time variations of 15% observed in the flux density ratio A/B between 10 and 28 of July 2019 (Table A.2). The spectral index is defined as F = F0 × (ν/ν0)α.
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