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Figure 1: Finding chart for WT233. Chart is 4.1 arcmin on a side; North is at the top, East to the left. The object marked with ticks, which we identify as the W&T star, is WT233b in Tables 1 and 2. The fainter object immediately to the SE is WT233f. See Sect. 5 for details. |
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Figure 2: Finding chart for WT1760. Chart is 4.1 arcmin on a side; North is at the top, East to the left. The object marked with ticks, which we identify with the W&T star, is WT1760b in Tables 1 and 2. The fainter object immediately to the NW is that alluded to in Sect. 5. |
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Figure 3: Color-color diagram for our stars compared to various fiducial lines. Note the unequal size of both axis, which makes it appear as if the errors in (V-R) are larger than those in (V-I), whereas in fact they are comparable. The solid line comes from Table 9 in Schneider (1996), which gives colors computed from Vilnius spectra. The dashed line is from Bessell (1995), and it is based on a combination of model and empirical model atmospheres for mid-K to late M-type stars. The dot-dashed line is from the Palomar/MSU spectroscopic survey of nearby stars by Hawley's et al. (1996), while the dotted line is from an empirical calibration presented by Drilling & Landolt (2000, Table 15.3.3). As it can be seen, the agreement between all these fiducial lines and our data is quite good, and within our observational errors. The four blueish stars marked in the plot are discussed further in the text. |
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