The Binary INformation from Open Clusters Using SEDs (BINOCS) Project:
  Reliable Photometric Mass Determinations of Binary Star Systems in Clusters
  We introduce a new binary detection technique, Binary INformation from Open
Clusters using SEDs (binocs), which we show is able to determine reliable
stellar multiplicity and masses over a much larger mass range than current
approaches. This new technique determines accurate component masses of binary
and single systems of the open clusters main sequence by comparing observed
magnitudes from multiple photometric filters to synthetic star spectral energy
distributions (SEDs) allowing systematically probing the binary population for
low mass stars in clusters for 8 well-studied open clusters. We provide new
deep, infrared photometric catalogs (1.2 - 8.0 microns) for the key open
clusters NGC 1960 (M36), NGC 2099 (M37), NGC 2420, and NGC2682 (M67), using
observation from NOAO/NEWFIRM and Spitzer}/IRAC. Using these deep
multi-wavelength catalogs, the binocs method is applied to these clusters to
determine accurate component masses for unresolved cluster binaries. We explore
binary fractions as a function of cluster age, Galactic location and
metallicity.
