CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release
CALIFA collaboration: B. Husemann, K. Jahnke, S. F. S\'anchez, D., Barrado, S. Bekerait\.e, D. J. Bomans, A. Castillo-Morales, C., Catal\'an-Torrecilla, R. Cid Fernandes, J. Falc\'on-Barroso, R., Garc\'ia-Benito, R. M. Gonz\'alez Delgado, J. Iglesias-P\'aramo, B. D., Johnson

TL;DR
The paper announces the first public release of CALIFA survey data, providing spatially resolved optical spectroscopy for 100 nearby galaxies, enabling diverse galaxy evolution studies.
Contribution
It offers the first public dataset of integral-field spectroscopic observations for a significant galaxy sample, including detailed data characteristics and quality assessments.
Findings
Median spatial resolution of 3.7 arcseconds
Spectrophotometric calibration better than 15%
Detection limits for emission lines and surface brightness
Abstract
We present the first public data release of the CALIFA survey. It consists of science-grade optical datacubes for the first 100 of eventually 600 nearby (0.005<z<0.03) galaxies, obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5m telescope at the Calar Alto observatory. The galaxies in DR1 already cover a wide range of properties in color-magnitude space, morphological type, stellar mass, and gas ionization conditions. This offers the potential to tackle a variety of open questions in galaxy evolution using spatially resolved spectroscopy. Two different spectral setups are available for each galaxy, (i) a low-resolution V500 setup covering the nominal wavelength range 3745-7500A with a spectral resolution of 6.0A (FWHM), and (ii) a medium-resolution V1200 setup covering the nominal wavelength range 3650-4840A with a spectral resolution of 2.3A (FWHM). We present…
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