This data release presents the first millimetre spectroscopic imaging of the Orion Nebula obtained with the CONCERTO instrument on the APEX telescope. The observations were carried out on 24 August 2022 under ESO programme 110.A-4194 (110.23NK; PI Désert) in excellent atmospheric conditions (pwv ≈ 0.4 mm). The dataset covers 0.5 deg² centred on the Orion Nebula (M42), spanning the frequency range 130–310 GHz (0.97–2.3 mm) at a typical angular resolution of 27″ and a spectral resolution of 6 GHz (sampled at 3 GHz). 

The primary data products include a fully calibrated spectral cube, velocity-integrated maps of the CO (2–1) and H₂O (3₁₃–2₂₀) lines, a white-light average map, continuum intensity and spectral index maps, and photometric maps. The typical rms noise is 47 mK per 3 GHz channel and 6–8 mK in the photometric maps. These CONCERTO maps reproduce the morphology and intensity of the Orion Nebula with high fidelity, demonstrating the instrument’s capability for wide-field millimetre spectroscopy. Such observations thus enable studies of the structure, dynamics, and energetics of the interstellar medium across a wide range of environments, offering unique insights into dust emission, molecular gas excitation, and feedback processes at millimetre wavelengths.

Users can query and download the data using the ESO Archive Science Portal or programmatic access.

The DOI assigned to this data collection is 10.18727/archive/103, and further details are available in the release description.