  We present the deep homogeneous $UBVRI$ photometric data of 135,071 stars
down to $V\sim23$ mag and I ~ 22 mag toward the Carina Nebula. These stars are
cross-matched with those from the previous surveys in the X-ray, near-infrared,
and mid-infrared wavelengths as well as the Gaia Early Data Release 3 (EDR3).
This master catalog allows us to select reliable members and determine the
fundamental parameters distance, size, stellar density of stellar clusters in
this star-forming region. We revisit the reddening toward the nebula using the
optical and the near-infrared colors of early-type stars. The foreground
reddening [E(B-V)_fg] is determined to be 0.35+/-0.02, and it seems to follow
the standard reddening law. On the other hand, the total-to-selective
extinction ratio of the intracluster medium (R_V,cl) decreases from the central
region (Trumpler 14 and 16, R_V,cl ~ 4.5) to the northern region (Trumpler 15,
R_V,cl ~ 3.4). It implies that the central region is more dusty than the
northern region. We find that the distance modulus of the Carina Nebula to be
11.9+/-0.3 mag (d = 2.4+/-0.35 kpc) using a zero-age main-sequence fitting
method, which is in good agreement with that derived from the Gaia EDR3
parallaxes. We also present the catalog of 3,331 pre-main-sequence (PMS)
members and 14,974 PMS candidates down to V ~ 22 mag based on
spectrophotometric properties of young stars at infrared, optical, and X-ray
wavelengths. From the spatial distribution of PMS members and PMS candidates,
we confirm that the member selection is very reliable down to faint stars. Our
data will have a legacy value for follow-up studies with different scientific
purposes.
