Cross-match between the latest Swift-BAT and Fermi-LAT catalogs
  We report the results of a cross-match study between the hard X-ray and GeV
gamma-ray catalogs, by making use of the latest 105-month Swift-BAT and 10-yr
Fermi-LAT catalogs, respectively. The spatial cross-matching between the two
catalogs results in the matching of 132 point-like sources, including ~5% of
false-match sources. Additionally, 24 sources that have been identified as the
same identifications are matched. Among the 75 extended sources in the
Fermi-LAT catalog, 31 sources have spatial coincidences with at least one
Swift-BAT source inside their extent. All the matched sources consist of
blazars (>60%), pulsars and pulsar wind nebulae (~13%), radio galaxies (~7%),
binaries (~5%), and others. Compared to the original catalogs, the matched
sources are characterized by a double-peaked photon index distribution, higher
flux, and larger gamma-ray variability index. This difference arises from the
different populations of sources, particularly the large proportion of blazars
(i.e., FSRQ and BL Lac). We also report 13 cross-matched and unidentified
sources. The matched sources in this study would be promising in the
intermediate energy band between the hard X-ray and GeV gamma-ray observations,
that is the unexplored MeV gamma-ray domain.
