Table 1.
Standard Johnson–Cousins V-filter magnitudes and colour indices of FU Ori and its comparison stars evaluated using Eq. (1), during the single night of January 11–12, 2014 (see Table 2 and Sect. 2.3.1).
| FU Ori | GSC 00714–00203 | GSC 00715–00188 | |
|---|---|---|---|
| V | 9.748(5) | 10.566(5) | 10.827(6) |
| U − B | 0.842(21) | 1.079(14) | 1.327(14) |
| B − V | 1.291(10) | 0.779(38) | 1.258(85) |
| V − Rc | 0.778(10) | 0.592(13) | 0.719(13) |
| Rc − Ic | 0.839(8) | 0.620(12) | 0.735(15) |
Notes. The errors in parentheses account only for photometric noise; the systematic 1–2% uncertainty of zero points Cft (see Table 2) has not been taken into account. The same comparison stars formed the mean comparison star for the MSO observations.
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