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Input Data

Data Management: Input Data Prepared by: Simon Krughoff ImSim Project: University of Washington LSST Preliminary Design Review August 29-September 2, 2011. Input Data. Summary Simulated Imagery Simulated operations Simulated time variable sky Atmosphere/Optics model CFHT Imagery

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Input Data

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  1. Data Management: Input DataPrepared by: Simon KrughoffImSim Project: University of WashingtonLSST Preliminary Design ReviewAugust 29-September 2, 2011

  2. Input Data Summary • Simulated Imagery • Simulated operations • Simulated time variable sky • Atmosphere/Optics model • CFHT Imagery • Camera design • Focal plane layout • Electronic properties • Calibration Products

  3. Input Data: Simulated Imagery • Simulated Observations • 10 years – ~3 Million observations • Historical weather and downtime • Filter and location chosen to satisfy science programs • Realistic slew, exposure, and shutter times

  4. Input Data: Simulated Imagery • Simulated Sky • Galactic structure model from Juric et al. (2008), Amores & Lepine (2005), Schlegel, Finkbeiner, & Davis (1998) • Solar system model from Grav et al. (2010) • Extragalactic positions from White with semi-analytic properties from De Lucia • Variable AGN/QSOs, Cepheids, RRLy, eclipsing binaries, AM CVn, microlensing events, M-dwarf flare

  5. Input Data: Simulated Imagery • Atmosphere/Optics Model • 6 moving screen model normalized to seeing from OpSim with historical wind velocity • Kolmogorov spectrum cloud model informed by historical cloud coverage data • Full optical system model

  6. Input Data: Simulated Imagery

  7. CFHT Data • ~19,000 MegaCam images • 23 May 2003 to 16 Feb 2008 • 36 two amp CCDs in rectangular grid • 1deg x 1deg fov • u*,g,r,i,z filters (note the u* is broader than the LSST u) • Bias Frames • Flat Frames • Fringe Frames for i and z images.

  8. Camera and Electronics Model • Focal plane layout • 189 imaging chips: 2000x2072 pix • 4 wavefront sensors • 21 3x3 rafts • Electronic design • 8x2 Amps per chip • 509x1000 pix per amp

  9. Calibration Products • 10 realizations with 2 exposures per realization • Reduced using DM stack to produce master calibration frames. • Bias frames • zero length exposures • Dark frames • 180 sec exposures with shutter closed • Per filter flats • Analytic fit to vignetting function sampled to place photons.

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