The Dark Energy Survey data processing and calibration system

Joseph J. Mohr; Robert Armstrong; Emmanuel Bertin; Greg Daues; Shantanu Desai; Michelle Gower; Robert Gruendl; William Hanlon; Nikolay Kuropatkin; Huan Lin; John Marriner; Donald Petravic; Ignacio Sevilla; Molly Swanson; Todd Tomashek; Douglas Tucker; Brian Yanny

doi:10.1117/12.926785

24 September 2012 The Dark Energy Survey data processing and calibration system

Joseph J. Mohr, Robert Armstrong, Emmanuel Bertin, Greg Daues, Shantanu Desai, Michelle Gower, Robert Gruendl, William Hanlon, Nikolay Kuropatkin, Huan Lin, John Marriner, Donald Petravic, Ignacio Sevilla, Molly Swanson, Todd Tomashek, Douglas Tucker, Brian Yanny

Author Affiliations +

Proceedings Volume 8451, Software and Cyberinfrastructure for Astronomy II; 84510D (2012) https://doi.org/10.1117/12.926785
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The Dark Energy Survey (DES) is a 5000 deg² grizY survey reaching characteristic photometric depths of 24^th magnitude (10 sigma) and enabling accurate photometry and morphology of objects ten times fainter than in SDSS. Preparations for DES have included building a dedicated 3 deg² CCD camera (DECam), upgrading the existing CTIO Blanco 4m telescope and developing a new high performance computing (HPC) enabled data management system (DESDM). The DESDM system will be used for processing, calibrating and serving the DES data. The total data volumes are high (~ 2PB), and so considerable effort has gone into designing an automated processing and quality control system. Special purpose image detrending and photometric calibration codes have been developed to meet the data quality requirements, while survey astrometric calibration, coaddition and cataloging rely on new extensions of the AstrOmatic codes which now include tools for PSF modeling, PSF homogenization, PSF corrected model fitting cataloging and joint model fitting across multiple input images. The DESDM system has been deployed on dedicated development clusters and HPC systems in the US and Germany. An extensive program of testing with small rapid turn-around and larger campaign simulated datasets has been carried out. The system has also been tested on large real datasets, including Blanco Cosmology Survey data from the Mosaic2 camera. In Fall 2012 the DESDM system will be used for DECam commissioning, and, thereafter, the system will go into full science operations.

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Joseph J. Mohr, Robert Armstrong, Emmanuel Bertin, Greg Daues, Shantanu Desai, Michelle Gower, Robert Gruendl, William Hanlon, Nikolay Kuropatkin, Huan Lin, John Marriner, Donald Petravic, Ignacio Sevilla, Molly Swanson, Todd Tomashek, Douglas Tucker, and Brian Yanny "The Dark Energy Survey data processing and calibration system", Proc. SPIE 8451, Software and Cyberinfrastructure for Astronomy II, 84510D (24 September 2012); https://doi.org/10.1117/12.926785

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