  We aim at identifying the cluster's members by deriving membership
probabilities for the sources within 1 degree of the cluster's center, going
further away than equivalent previous studies. We measure accurate proper
motions and multi-wavelength (optical and near-infrared) photometry using
ground based archival images of the cluster. We use these measurements to
compute membership probabilities. The list of candidate members from
Barrado+2001 is used as training set to identify the cluster's locus in a
multi-dimensional space made of proper motions, luminosities and colors. The
final catalog includes 338892 sources with multi-wavelength photometry.
Approximately half (194452) were detected at more than two epochs and we
measured their proper motion and used it to derive membership probability. A
total of 4349 candidate members with membership probabilities greater than 50%
are found in this sample in the luminosity range between 10 and 22mag. The slow
proper motion of the cluster and the overlap of its sequence with the field and
background sequences in almost all color-magnitude and color-color diagrams
complicate the analysis and the contamination level is expected to be
significant. Our study nevertheless provides a coherent and quantitative
membership analysis of Messier 35 based on a large fraction of the best
ground-based data sets obtained over the past 18 years. As such, it represents
a valuable input for follow-up studies using in particular the Kepler K2
photometric time series.
