Updated plot for HD 140283 from Gustafsson (2004). On the y axis are shown the [Fe/H] values determined from spectroscopy as reported in the literature. The x axis gives the year of the publication. The error bars indicate (full lines) the line-to-line scatter (when available) and (dotted lines) a few examples of attempts to address the full error including errors in the stellar parameters. The circles (°, at 1996) refer to a single analysis using three different temperature scales and the cross (×) refers to an analysis of a high-resolution spectrum using the SEGUE pipeline (Lee et al. 2011, see also Sect. 4 for database usage).
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