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The SUNRISE balloon-borne solar observatory, consisting of a 1~m aperturetelescope that provided a stabilized image to a UV filter imager and an imagingvector polarimeter, carried out its second science flight in June 2013. Itprovided observations of parts of active regions at high spatial resolution,including the first high-resolution images in the Mg~{\sc ii}~k line. Theobtained data are of very high quality, with the best UV images reaching thediffraction limit of the telescope at 3000~\AA\ after Multi-Frame BlindDeconvolution reconstruction accounting for phase-diversity information. Here abrief update is given of the instruments and the data reduction techniques,which includes an inversion of the polarimetric data. Mainly those aspects thatevolved compared with the first flight are described. A tabular overview of theobservations is given. In addition, an example time series of a part of theemerging active region NOAA AR~11768 observed relatively close to disk centreis described and discussed in some detail. The observations cover the pores inthe trailing polarity of the active region, as well as the polarity inversionline where flux emergence was ongoing and a small flare-like brighteningoccurred in the course of the time series. The pores are found to containmagnetic field strengths ranging up to 2500~G and, while large pores areclearly darker and cooler than the quiet Sun in all layers of the photosphere,the temperature and brightness of small pores approach or even exceed those ofthe quiet Sun in the upper photosphere.

The second flight of the SUNRISE balloon-borne solar observatory: overview of instrument updates, the flight, the data and first results