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Simulation Workshop Agenda

Simulation Workshop Agenda. Kirk Gilmore (Lead Manager of the LSST Camera team) 9:00am - 9:05 am: Welcome Address Philip Pinto (Head of the full LSST simulation program) 9:05am - 9:25 am: Overview of the LSST Simulation Program and the LSST_EtoE-SS.

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Simulation Workshop Agenda

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  1. Simulation WorkshopAgenda Jernigan September 18, 2006 • Kirk Gilmore (Lead Manager of the LSST Camera team) 9:00am - 9:05 am: Welcome Address • Philip Pinto (Head of the full LSST simulation program) 9:05am - 9:25 am: Overview of the LSST Simulation Program and the LSST_EtoE-SS. • John Peterson (Key member of the R+D team that is developing the LSST-EtoE-SS) 9:25am - 9:40 am: Status of R+D version of the LSST-EtoE-SS and Examples of results. • Garrett Jernigan (Lead Manager of the R+D team developing the LSST-EtoE-SS) 9:40am - 9:55 am: Presentation of the list of possible value-added topics • Pat Burchat (Moderator for the workshop discussion) 9:55am - 11:30am Open discussion of value-added topics with panel (Pinto, Jernigan, Peterson) • Steve Kahn (Principal Investigator for LSST Camera Team) 11:30am - 11:45am: Summary of Workshop

  2. Workshop on SimulationsCamera All Hands Meeting September 18, 2006Garrett JerniganJohn PetersonPhilip Pinto Jernigan September 18, 2006 Value-Added Components and Applications of the LSST End-to-End Science Simulator

  3. Simulation Workshop (separate from simulation session tomorrow) Value-Added Categories: - Core of the photon-by-photon Monte Carlo simulator - Ancillary code external to the simulator - Use of End-to-End Simulator with followup modification or extension - Work on external targeted simulations that do not involve the End-to-End Sim Status of LSST End-to-End Science Simulator and Bootstrap Problem: - Transition from REV 0 to REV 1 - Separate R+D and Public Versions Simulation Topics (Some overlap; feel free to add your own topics) Major Categories: - Strong form - What is scientifically important ? - Weak form - What is in the data S/N>3 in 10 years stacks of images ? Major Categories related to the Science Requirements Document (SRD) - Photometric - Astrometric - Shear - Calibration - Science Pipeline Jernigan September 18, 2006

  4. Jernigan September 18, 2006 Science Driven Simulations: Weak Lensing cosmology Supernova and optical transients (GRBs, Transients hours to months) Individual Strong lensing targets Time dependent simulations Tests of Gravity Classical Stellar Variability (CVs, Be stars, stellar eruptions, etc) Trans-Neptunian Objects Kuiper Belt and small body population Near Earth asteroids (NEA 106 >50m; 104 >200m) Asteroids and Comets Complete census of L and T dwarfs within 10 pc (local solar neighborhood) Moving object simulation Transient object simulation

  5. Jernigan September 18, 2006 Image and Data Topics; Ghost Images and special issue of Bright Stars Geometric Diffraction; Monte Carlo Diffraction; Approximate Diffraction Dust scattering within the telescope/camera Background as a function of moon phase/wave band Cosmic rays and secondaries (function of angle, time, etc) Diffraction calculation and/or approximations CCD/focal plane (mechanical, shape, electronic effects, etc) Backgound Models (similar th FRED; effects of baffles, ghost images, etc) Physics of CCDs (lack of flatness, electronic crosstalk; post processing) Detector Details (pixels, gaps, alignments)å

  6. Jernigan September 18, 2006 Telescope/Camera models: Wind Loading Model for simulation (and other mechanical modeling) Control system model (Guider and Wavefront) Thermal modeling Guider Simulation Filter cos angle approximation verification Filter/optical design update (variable thickness ?) Calibration Related Simulations: Camera without the telescope; Flat fields; Bias frames; Absolute physical calibration (Stubbs concept) Photometric and Astrometric calibration simulations Science Pipeline testing

  7. Jernigan September 18, 2006 Extra Topics: Projects tied to Science Collaborations (many simulation opportunities) SDSS related projects (Atmospheric models from wide field data and many others) Synthetic stars/galaxies Earth Orbiting satellites (Air Force related; needs good coordination with LSST management) Interpretation of Atmospheric data: (SOAR campaign; SDSS option, etc) Quicklook image summary (background, PSF maps, object IDs, etc; coordinate with DM effort) Support Science Collaborations; science pipeline prototypes and testing Comparing other data to LSST simulated data (SDSS, PanStarrs, DLS, etc) Photometric z simulations (classical approach, Baysian approach, Neural Networks, others?) Atmosphere parameter generation Atmospheric transmission function User tools: GUI for building simulation input and setting parameters Virtual LSST: beyond just a GUI "Interface" to cadence simulator Bootstrap and efficiency enhancements Field dependent Photometric effects Catalog of Spectra Energy Distributions (SEDs) and spatial models "Blink" image simulation

  8. Jernigan September 18, 2006 THE END

  9. Science End-to-End Simulator Overview and Status Jernigan September 18, 2006 (Definition of End-to-End: History of photons from Galaxy to Si) Design and Implementation Goals: Very fast [realtime];10% science accuracy; available early Next Phase:Accurate filter model (from Gilmore); Control System Model; autoguider + wavefront sensor (coordinate with Pinto; leverage the work of others) Physics of Atmospheric PSF Effects Goals:Ab initio understanding of PSF; predict weak lensing performance Next Phase:Solve bottleneck problem: normalization of ellipticity of the PSF Applications (Opportunities for others to help; coordinate with Pinto) Goals:Trade studies; verify science and engineering requirements; informs design (Catch-22); Next Phase:Autoguider Theory (request from Althouse); Stacks for 10s of images for weak lensing study; User Interface (Opportunities for others to help; coordinate with Pinto) Goals: Flexible and extendable implementation; Borrow from astronomy heritage (ds9,tcl,iraf); Next Phase: Improved User Interface (need more resources; very expensive 1 FTE year) Virtual LSST (optimal way to amplify utility for the full LSST team - 1/4 FTE year)

  10. Science End-to-End Simulator Applications Jernigan September 18, 2006 PSF Properties and Weak Lensing - Atmospheric Model: primary (nears completion) - LSST Optics Model: secondary (needs much more work) - Goal: precise weak lensing metric (test with SOAR/Gemini) Auto-guider and Focus - Significant effect on PSF (likely field coherent) - Optimize in two parameters (guiding and ellipticity) - Coupling to focus Wavefront Sensors and Control - Significant effect on PSF ( complex field dependence) - Optimize for minimal effect on PSF - PSF interpolation based on derived atmospheric parameters - Testbed for proposed integrated software methedology - Test models with SOAR wavefront sensor data Field Dependent Filter Effects - Corrections to photometry - Evaluation of accuracy “Blink” Image Project - Need all the “dirty” details - Long term goal: Transient science evaluation Calibration Simulation - Photometry and Astrometry - Routine image processing (bias; flatfield; effect of scattering) Effects of “Dirty” details - Cosmic Rays (GEANT with a full telescope/camera structure 80e per micron for minimum inonizing particle) - Detector Details - pixels, gaps, alignments - Bright Star Problem - Diffraction effects - spider (FFT problem) + new photon method - Ghost Images - Scattering off dust (Baffles ?) - CCDs + CMOS issues (mechanical model; thermal model ?)

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