Free Access

Table 2

Parameters that are used to select the sample of UDG candidates.

Parameter Requirement Total discardeda Unique discardedb

μ(r,reff) ⟩ 24.0 mag arcsec-2 19 328 4043
μ(r,reff) ⟩ 26.5 mag arcsec-2 15 399 604
r eff 1.5 kpc 26 268 10 007
r eff 7.0 kpc 8287 43
distSExc 7.0 pix 932 122
Sérsic-n 4.0 19 158 1186

Notes. Shown are the total numbers of rejected objects for the different selection criteria (combining all eight clusters).


Total number of sources that do not meet this criterion.


Number of sources that do not meet this criterion, but do meet all others.


Distance between best-fitting GALFIT position and the input position obtained using SExtractor (1 pix =ˆ 0.185′′). If this difference is too large it is generally a sign that the GALFIT fit was unstable.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.