The Physics of the Accelerating Universe Survey (PAUS) collaboration, led by the Spanish Institute of Space Sciences (ICE-CSIC), has announced the release of the PAUS survey data, a groundbreaking catalogue of cosmic distances derived from data obtained using the PAUcam camera on the William Herschel Telescope (WHT). This release will help astronomers to better understand how cosmic structures form, particularly under the influence of dark matter and dark energy.

Commissioning of PAUCam, the imager for the Physics of the Accelerating Universe survey, is complete, and routine science exploitation is under way (for first-light images, see earlier news item). PAUCam is a visiting instrument instrument at the WHT, and is available for use by astronomers from the ING community.

The camera for the PAU (Physics of the Accelerating Universe) project succesfully saw first light at the prime focus of the William Herschel Telescope on the night June 3rd. PAUCam is an advanced imager comprising a mosaic of 18 state-of-the-art, fully-depleted, red-sensitive Hamamatsu CCDs, and a field of view with a diameter of about one degree (or about 14 times the sky area covered by the WHTs current prime-focus imager), of which 40 arcminutes are unvignetted. PAUCam was designed and built by a consortium of Spanish institutions (IFAE, ICE-CSIC/IEEC and PIC from Barcelona; CIEMAT and IFT-UAM/CSIC from Madrid).