The first public data release from the QUIJOTE experiment, based on observations carried out with the Multi-Frequency Instrument (MFI), is now officially registered with a DOI, ensuring long-term accessibility, traceability, and proper citation by the scientific community.

The release included intensity and polarization maps at 11, 13, 17 and 19 GHz, covering approximately 30,000 square degrees, which represents most of the northern sky region. These maps were produced from more than 9,000 hours of observations conducted between May 2013 and June 2018 with QUIJOTE MFI at the Teide Observatory. The data set offers angular resolutions of about one degree and achieves polarization sensitivities of 35–40 μK per one-degree beam, with values in total intensity a factor of 2–4 higher.

The QUIJOTE MFI data set provides a unique window into the low-frequency microwave sky and is particularly relevant for cosmology and Galactic science, including studies of synchrotron emission, anomalous microwave emission (AME), and the polarized foregrounds that challenge precise measurements of the Cosmic Microwave Background.

More information: DOI

Rubiño-Martín et al. (2023), _MNRAS_ 519, 3383
“QUIJOTE scientific results – IV. A northern sky survey in intensity and polarization at 10–20 GHz with the Multi-Frequency Instrument.”