  Production of prompt isolated photons at hadron colliders provides a probe of
perturbative QCD and can be used to study the gluon density function of the
proton. The ATLAS collaboration has performed precise measurements of the
inclusive production of isolated prompt photons in 20.2 fb${}^{-1}$ of data
collected at $\sqrt{s}=8$ TeV and in 6.4 pb${}^{-1}$ of data collected at
$\sqrt{s}=13$ TeV. The measurements are compared with state-of-the-art theory
predictions at NLO in QCD and with predictions of several MC generators.
Production of inclusive jets at hadron colliders also provides a probe of
perturbative QCD. The inclusive jet production cross-section was measured in 78
pb${}^{-1}$ of data collected at $\sqrt{s}=13$ TeV. Results have been compared
with (state-of-the-art) theory predictions at NLO in QCD, interfaced with
different parton distribution functions.
