Notes. (1) Paper I; (2) Green et al. (2022). The column ‘method’ refers to how the distance was estimated: numbers refer to cited references, ‘GSP-Phot’ refers to Gaia DR3 GSP-Phot distance estimate where available, ‘para’ refers to inverted parallax when the ‘GSP-Phot’ distance is not available and the relative uncertainty on the parallax is <1/8, and ‘n/a’ is quoted where the distance is unknown and no estimate for R₀ or n_e was attempted. The angular estimate for R₀ is taken from Kobulnicky et al. (2016) and Peri et al. (2015), depending on which catalogue the bow-shock candidate is located in, and converted to a linear size using the distance estimate. The intensity around the apex of the bow shock, I_ν, is measured from the observations, or a 3σ upper limit is taken for non-detections using the RMS level of the map (column 5). The estimated electron density, n_e, is calculated from Eq. (2) and is always an upper limit because part of the emission could be synchrotron and not bremsstrahlung.