Smoothed star counts map of NGC 6397 from Gaia. The image size is 100″ on the side (half the HST field of view). The star counts are computed in cells of and then smoothed by a Gaussian with (using scipy.stats.gaussian_kde in Python, with a bandwidth of 0.2). The color bar provides the star counts per square degree. The green and red circles represent the GC center calculated by Goldsbury et al. (2010) and Gaia Collaboration (2018a), respectively.
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