Discovery of 34 low-mass comoving systems using NOIRLab Source Catalog
  DR2
  We present the discovery of 34 comoving systems containing an ultra-cool
dwarf found by means of the NOIRLab Source Catalog (NSC) DR2. NSC's angular
resolution of $\sim$1" allows for the detection of small separation binaries
with significant proper motions. We used the catalog's accurate proper motion
measurements to identify the companions by cross-matching a previously compiled
list of brown dwarf candidates with NSC DR2. The comoving pairs consist of
either a very low-mass star and an ultra-cool companion, or a white dwarf and
an ultra-cool companion. The estimated spectral types of the primaries are in
the K and M dwarf regimes, those of the secondaries in the M, L and T dwarf
regimes. We calculated angular separations between $\sim$2 and $\sim$56",
parallactic distances between $\sim$43 and $\sim$261 pc and projected physical
separations between $\sim$169 and $\sim$8487 AU. The lowest measured total
proper motion is 97 mas yr$^{-1}$, the highest 314 mas yr$^{-1}$. Tangential
velocities range from $\sim$23 to $\sim$187 km s$^{-1}$. We also determined
comoving probabilities, estimated mass ratios and calculated binding energies
for each system. We found no indication of possible binarity for any component
of the 34 systems in the published literature. The discovered systems can
contribute to the further study of the formation and evolution of low-mass
systems as well as to the characterization of cool substellar objects.
