  In 2021, a catalog of 536 fast radio bursts (FRBs) detected with the Canadian
Hydrogen Intensity Mapping Experiment (CHIME) radio telescope was released by
the CHIME/FRB Collaboration. This large collection of bursts, observed with a
single instrument and uniform selection effects, has advanced our understanding
of the FRB population. Here we update the results for 140 of these FRBs for
which channelized raw voltage ('baseband') data are available. With the
voltages measured by the telescope's antennas, it is possible to maximize the
telescope sensitivity in any direction within the primary beam, an operation
called 'beamforming'. This allows us to increase the signal-to-noise ratio
(S/N) of the bursts and to localize them to sub-arcminute precision. The
improved localization is also used to correct the beam response of the
instrument and to measure fluxes and fluences with a ~10% uncertainty.
Additionally, the time resolution is increased by three orders of magnitude
relative to that in the first CHIME/FRB catalog, and, applying coherent
dedispersion, burst morphologies can be studied in detail. Polarization
information is also available for the full sample of 140 FRBs, providing an
unprecedented dataset to study the polarization properties of the population.
We release the baseband data beamformed to the most probable position of each
FRB. These data are analyzed in detail in a series of accompanying papers.
