This data release presents the first instalment of the SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic Interstellar Medium) survey, a large spectroscopic programme mapping molecular gas across the inner Milky Way. The survey was conducted with the APEX 12-m telescope between 2013 and 2017 and covers approximately 84 deg² of the southern Galactic plane, with continuous coverage from −60° ≤ l ≤ +17° at |b| ≤ 0.5°. Additional regions extend the latitude coverage (e.g. towards the Central Molecular Zone, RCW 120, and the Nessie filament) and include a dedicated 2 deg² field around W43 for cross-comparison with northern surveys.

NIRPS data for observations between 2025-04-01 12:00 and 2025-07-24 12:00, reduced with the pipeline version 3.2.6, have been affected by a technical issue impacting the accuracy of the radial velocity. For science cases requiring a precision better than 10 m/s, those data should not be used. We strongly advise (re-) downloading the updated Phase 3 data, which have been reprocessed with the pipeline version 3.2.7 (refer to the PROCSOFT FITS keyword).

Also, please beware that the QC0.NIRPS quick-looks in that period have not been reprocessed and remain affected by this issue.

We apologize for any inconvenience this may cause and thank you for your understanding.

This data release presents a wide-field MUSE mosaic of the nearby starburst galaxy NGC 253 (the Sculptor Galaxy), covering its entire star-forming disc. The mosaic combines 103 individual MUSE pointings in Wide Field Mode, spanning 20 × 5 arcmin² and totaling approximately 25 hours of on-source exposure. Most of the observations (101 pointings) were obtained without adaptive optics (AO) using short exposures (~850 s), while the two central nuclear pointings were observed with AO and longer integrations (~2000 s).

As of Monday 28^th of July 2025, the archive user interfaces will no longer offer the option to download data via the Request Handler. The Download Portal will remain the only choice available for web-access to archival data.

This data release provides access to reduced scientific data obtained with the cryogenic high-resolution spectrograph CRIRES+, an upgrade of the original instrument CRIRES, which was available till July 2014. CRIRES+ is in operation at the ESO VLT since October 2021. This instrument is a cross-dispersed infrared echelle specrograph with increased wavelength range covered simultaneously by a factor of ten in respect to the old CRIRES. In addition, CRIRES+ is equipped with a new detector focal plane array composed of three Hawaii 2RG detectors with a 5.3 μm cut-off wavelength, a new spectropolarimetric unit was added, and the calibration system was enhanced.