have first created a profile as in [@King68], in order to compare our results with the existing data in the literature. The comparison has been done with the radial density profile of M55 published by [@Pryor91] which includes the visual star counts of King et al.. We could not compare our data with [@Irwin84] because they have not published their observations in tabular form.

\[profconf\]

Density profile for stars above the TO
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Figure \[profile\] shows the radial density profile for the TO plus SGB stars extracted from the CMD of M55 (from 1 magnitude below the TO to the brightest limit of our photometry). We have selected the stars within $2.5\sigma$ from the fiducial line of the CMD plus the contribution coming from the BS and HB stars; star counts has been limited at the magnitude $V\le18.5$. This relatively bright limit corresponds approximately to the limit of the visual star counts by [@King68] on the plate ED-2134 (in order to make the comparison easier we used the same radial bins of King). Our counts have been transformed to surface brightness and adjusted in zero point to fit the [@Pryor91] profile of M55.

The agreement with the data presented by 