CALIFA, the Calar Alto Legacy Integral Field Area survey: IV. Third Public data release
S. F. S\'anchez, R. Garc\'ia-Benito, S. Zibetti, C. J. Walcher, B., Husemann, M. A. Mendoza, L. Galbany, J. Falc\'on-Barroso, D. Mast, J., Aceituno, J. A. L. Aguerri, J. Alves, A.L. Amorim, Y. Ascasibar, D., Barrado-Navascues, J. Barrera-Ballesteros, S. Bekerait\`e

TL;DR
The paper announces the third public data release of the CALIFA survey, providing high-quality integral field spectroscopic data for 667 galaxies, including new spectral setups and improved data processing, to support galaxy research.
Contribution
It presents the latest CALIFA data release with expanded galaxy samples, new spectral configurations, and enhanced data calibration and reconstruction methods.
Findings
Data for 667 galaxies released, including 200 from previous release.
Three spectral setups available with different resolutions and wavelength ranges.
Total of 1576 datacubes and 1.5 million spectra provided.
Abstract
This paper describes the Third Public Data Release (DR3) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality data for 667 galaxies are made public, including the 200 galaxies of the Second Public Data Release (DR2). Data were obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5m telescope at the Calar Alto Observatory. Three different spectral setups are available, i) a low-resolution V500 setup covering the wavelength range 3749-7500 AA (4240-7140 AA unvignetted) with a spectral resolution of 6.0 AA (FWHM), for 646 galaxies, ii) a medium-resolution V1200 setup covering the wavelength range 3650-4840 AA (3650-4620 AA unvignetted) with a spectral resolution of 2.3 AA (FWHM), for 484 galaxies, and iii) the combination of the cubes from both setups (called COMBO), with a spectral resolution of 6.0 AA and a wavelength range between…
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