  The chloroniumyl cation, HCl$^+$, has been recently identified in space from
Herschel's spectra. A joint analysis of extensive vis-UV spectroscopy emission
data together with a few high resolution and high accuracy mm-wave data
provided the necessary rest frequencies to support the astronomical
identification. Nevertheless, the analysis did not include any infrared
vibration-rotation data. Furthermore, with the end of the Herschel mission,
infrared observations from ground may be one of the few available means to
further study this ion in space. In this work we provide a set of accurate
rovibrational transition wavenumbers as well as a new and improved global fit
of vis-UV, IR and mm-wave spectroscopy laboratory data, that will aid in future
studies of this molecule.
