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Exploration

Exploration. Wavelength Angular resolution Area surveyed Depth Time resolution. deep wide fast. Large aspheric optics Microelectronics Software. What if we could go faint fast over the entire visible sky?. Unprecedented Planetary Probes NEO > 250m, KBO, Comets, debris

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Exploration

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  1. Exploration • Wavelength • Angular resolution • Area surveyed • Depth • Time resolution deep wide fast

  2. Large aspheric optics • Microelectronics • Software

  3. What if we could go faint fastover the entire visible sky? • Unprecedented Planetary Probes • NEO > 250m, KBO, Comets, debris • Probe Dark Energy & Dark Matter • Open the Time Window • Faint Transients (GRB, SN, …?) • Variability studies: stars, galaxies… Requires: reach 24 V mag in ~10 sec over ~5-10 sq deg field LSST

  4. 8.4m diameter primary mirror 7 square degree field of view >15000 Gbytes per night Real-time analysis Celestial Cinematography

  5. DATA

  6. LSST Data Flow Model ~600 MB/sec peak, 15 sec cycle ~ 18 TB/night 103 – 104/night?, 1-10 GB? 10-100GBytes/night? Working Flat Readout and Flatfield Calib. insertion Stacked Sum Boxcar Flat Gen Image Difference “Static” DB Variability Detection Y N • Alert, export: • photometry • flags • Light Curve... Known Obj? Update LC DB Update Calib DB Classifier

  7. 1 bit per 10 trillion cubic light years LSST 2017: 15 Petabyte time-tagged imaging database 1 TB photometric catalog

  8. Petabytes on spinning disks Now LSST • Not a problem in 2008 • Multi-site disk farms • Co-located computing

  9. A Challenge: Software • Key Project Pipelines • Robust Automated Variability Discrimination • Automated Variability Classification • Software adaptive optics – PSF control • Detection Efficiency Calibration • Lossy mining algorithms • Data visualization We can start now, and are doing so.

  10. Key Science Pipelines • multi-taps & realtime calibration • defined data products • data quality verification • duplicate pipelines for testing • industrial model • build on SLOAN, DLS, S-MACHO

  11. Data Quality Assessment

  12. Challenge: Craft the database and tools to enable answers to unanticipated questions

  13. LSST Precursor Projects • SDSS • Deep Lens Survey • Super MACHO • RAPTOR • 80-member LSST Collaboration • has members from all these • projects

  14. The Large Synoptic Survey Telescope – Massively Parallel Astronomy DATA PUBLIC Simultaneously address: • Solar System Probes: Earth-crossing asteroids, Comets, TNOs • Space assets & space junk to 1 cm • Dark matter/dark energy via weak lensing • Dark matter/dark energy via supernovae • Galactic Structure encompassing local group • Dense astrometry over 30000 sq.deg -> deep proper motion science • Gamma Ray Bursts and transients to high z • Gravitational mlensing • Variable stars/galaxies • QSO time delays vs z • Transients to 25 mag: the unknown • 5-band 27 mag photometric survey • Unprecedented many Pbyte time-tagged photometric database

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