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Дата изменения: Wed Mar 18 12:25:11 2015 Дата индексирования: Sun Apr 10 01:45:18 2016 Кодировка: Поисковые слова: ultraviolet |
Amplitude calibration was based on 3C286, whose fluxes at 4885 and 1465 MHz were assumed to be 7.41 and 14.41 Jy, respectively, in accord with the scale of Baars et al. (1977).
short description of columns, as taken from the publication:
5 and 6. This is the flux of the core in all cases where this can be determined. Sources where this could not be done have an asterisk in column 14 or 15. The error in the flux is estimated to be less than ~ sqrt [(0.03S)**2 + (0.002)**2] Jy, with S in Jy.
8, 9, 11, and 12. The listed flux applies to the core only, unless the core cannot be distinguished, in which case the listing applies to the whole source. The error in polarized flux is estimated to be sqrt [4 + (0.4S)**2] mJy, where S is the total flux in Jy. The error in position angle is strongly dependent upon the polarized flux, and is roughly given by 65 sqrt[4 + (0.4S)**2]/m degrees.
14 and 15. Listed secondaries are generally found within the clean-search window defined earlier. Occasionally, larger windows were searched to find more distant structure. The absence of a listed secondary does not guarantee the source has none -it may lie outside the search window. This is particularly true at 6 cm where the search window was 6.4 arcsec wide. Entries marked by an asterisk indicate the source is slightly resolved, but not enough for a reliable map.
16-18. These are taken from Hewitt and Burbidge