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LSST Studies Large Synoptic Survey Telescope

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  1. LSST StudiesLarge Synoptic Survey Telescope DOE HEP Program Review April 18, 2006 Brookhaven National Laboratory Morgan May

  2. LSST at Brookhaven • Physics Dept (full time): James Frank, Sheng Wang (grad student), Postdoc, MM • Instrumentation: Veljko Radeka, Paul O’Connor, Peter Takacs • Many others making important contributions Morgan May

  3. LSST Astrophysics/Cosmology • Cosmology data  Fundamental Physics • Nature of Dark Energy: • Vacuum energy, scalar field or modified gravity? • Weak lensing- growth of structure+geometry • Multiple techniques • BNL role: Science – Sensors – Data Management/Analysis • Collaborators (Camera): Harvard, SLAC, Stanford, LLNL, U. of Illinois at Urbana, U. of Pennsylvania Morgan May

  4. LSST • Will survey sky 100 times faster than any existing facility. • Camera-DOE • 3 Gpixel focal plane • Data rate comparable to ATLAS Morgan May

  5. CMBLSS  z=1000 3>z>0 Courtesy of A. Kravtsov (U Chicago) WMAP 3 year Morgan May

  6. Weak Lensing by Large Scale Structure Courtesy of Alexander Refregier Morgan May

  7. Dark Energy Properties: w,wa LSST’s 200,000 galaxy clusters will tightly constrain dark energy equation of state P=wρ Morgan May

  8. Neutrino Dark matter: mν • Cosmology sensitive to Σmνbreaking the degeneracy of ν oscillation measurements • νstart out as hot dark matter, become non-relativistic (CDM) • LSST+Planck sensitive to mν > .03 eV < mνatmospheric Morgan May

  9. Galaxy Cluster Identification Filter Optimization LSST R&D Proposal January 2006 To be published Blue: Galaxy clusters detected by LSST using tomography Green: Apparent clusters due to projection effects Morgan May

  10. Sensor Studies • BNL-Harvard-CfA team. BNL lead role in Science Sensor development • $1.1 millionin study contracts funded by private donors, initiated by BNL • Pre-prototype sensors start arriving at BNL in July for testing • QE, point spread function of CCD and CMOS imagers. Wavelength range: UV to near IR • V. Radeka will discuss tomorrow Morgan May

  11. Data Management/Analysis • LSST Computing Facility • Synergy with BNL ATLAS Computing • Analysis sensor test data • Benchmarking pipelines on parallel processors • Simulations and analysis of precursor data sets • Postdoc 50% funding from LSST Corp Morgan May

  12. Future • LSST collaboration submitted R&D proposal to DOE January 2006 • 3 years R&D, followed by 4 years construction; First Light FY 2013 • Key role for BNL Morgan May