CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release

TL;DR

The paper announces the release of the second public data set from the CALIFA survey, providing integral field spectroscopic data for 200 galaxies with improved calibration and resolution, enabling diverse galaxy studies.

Contribution

This work provides the second public data release of CALIFA, including 200 galaxies with enhanced spectrophotometric calibration and spatial resolution, expanding the available data for galaxy analysis.

Findings

Data covers a redshift range of 0.005 to 0.03.

Spectrophotometric calibration is better than 6%.

Median spatial resolution is 2.5 arcseconds.

Abstract

This paper describes the Second Public Data Release (DR2) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. The data for 200 objects are made public, including the 100 galaxies of the First Public Data Release (DR1). Data were obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5 m telescope at the Calar Alto observatory. Two different spectral setups are available for each galaxy, (i) a low-resolution V500 setup covering the wavelength range 3745-7500 \AA\ with a spectral resolution of 6.0 \AA\ (FWHM), and (ii) a medium-resolution V1200 setup covering the wavelength range 3650-4840 \AA\ with a spectral resolution of 2.3 \AA\ (FWHM). The sample covers a redshift range between 0.005 and 0.03, with a wide range of properties in the Color-Magnitude diagram, stellar mass, ionization conditions, and morphological types. All released cubes were reduced with the latest pipeline, including improved spectrophotometric calibration, spatial registration and spatial resolution. The spectrophotometric calibration is better than 6% and the median spatial resolution is 2.5". Altogether the second data release contains over 1.5 million spectra. It is available at http://califa.caha.es/DR2.