  Ongoing all-sky surveys by the the eROSITA and the Mikhail Pavlinsky ART-XC
telescopes on-board the Spectrum Roentgen Gamma (SRG) mission have already
revealed over a million of X-ray sources. One of them, SRGA
J124404.1-632232/SRGU J124403.8-632231, was detected as a new source in the
third (of the planned eight) consecutive X-ray surveys by ART-XC. Based on the
properties of the identified optical counterpart it was classified as a
candidate X-ray binary (XRB). We report on the follow-up observations of this
source with Nuclear Spectroscopic Telescope Array (NuSTAR), Neil Gehrels Swift
Observatory (Swift), and the Southern African Large Telescope (SALT), which
allowed us to unambiguously confirm the initial identification and establish
SRGU J124403.8-632231 as a new X-ray pulsar with a spin period of ~538 s and a
Be-star companion, making it one of the first Galactic X-ray pulsars discovered
by SRG.
