Now using SDSS data to look at Bootes I. Different theoretical isochrone (older; 10 Gyr with Fe/H = -2), again plotted in yellow. Red points are stars within 0.2 of the isochrone, what I select as the stellar population.
[SDSS data is ra between 209.5 and 210.5, dec between 14 and 15]
Color-magnitude diagram:
The first of the next two plots is the SDSS data plotted spatially. The second spacial plot is only the subset of the data identified above as being in the stellar population.
All data, spatial plot:
Selected stellar population, spatial plot:
Here we do not see Bootes I distinctly, though at least some bad data has been removed (see straight line in upper-right of first graph does not appear in second).
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