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Giant Magellan Telescope

Giant Magellan Telescope. GSMT Committee Requests. Baseline Design First & Second Generation AO Capabilities Project Schedule & Milestones First-Light & Second Generation Instruments Operations Models Public Access. GMT Partners. Carnegie Institution of Washington Harvard University

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Giant Magellan Telescope

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  1. Giant Magellan Telescope GSMT Committee, Los Angeles, Oct. 20, 2005

  2. GSMT Committee Requests • Baseline Design • First & Second Generation AO Capabilities • Project Schedule & Milestones • First-Light & Second Generation Instruments • Operations Models • Public Access GSMT Committee, Los Angeles, Oct. 20, 2005

  3. GMT Partners • Carnegie Institution of Washington • Harvard University • Massachusetts Institute of Technology • University of Arizona • University of Michigan • Smithsonian Institution • The University of Texas at Austin • Texas A&M University GSMT Committee, Los Angeles, Oct. 20, 2005

  4. Telescope Structure & Optics GSMT Committee, Los Angeles, Oct. 20, 2005

  5. GMT Optical Design Primary Mirror D1 = 25.4 meter R1 = 36.0 meters K = -0.9983 f/0.7 primary mirror overall Gregorian secondary mirror D2 = 3.2 meter R2 = 4.2 meter K2 = -0.7109 1.06 m Segments aligned with primary mirrors Combined Aplanatic Gregorian focus f/8.2 final focal ratio Field of view: ~20-24 arc-min. BFD = 5.5 meters M2 conjugate = 160 m above M1 GSMT Committee, Los Angeles, Oct. 20, 2005

  6. GMT Studies • Structure • FEA static and modal analysis • Dynamic response to wind disturbance • Optics handling & exchange • Mechanisms • Hydrostatic bearings • Drives • Instrument rotator platform • Mirror covers • Manufacturability & Cost GSMT Committee, Los Angeles, Oct. 20, 2005

  7. Primary Mirror GMT1 • Objectives • Develop the technology for casting and polishing 8.4-m off-axis aspheric mirrors. • Casting & generating non-symmetric blanks • Metrology for testing highly aspheric off-axis mirrors • Polishing with stressed lap • Establish the pipeline for sequential processing of mirrors. • Schedule requires ~1 finished mirror per year after ramp-up. • Production of the first GMT primary mirror segment. • Status of GMT1 fabrication-- On Schedule • Blank is cast • Projected furnace opening October 24 • Preparations underway for lifting and clean-out of the blank • Modifications of test tower underway GSMT Committee, Los Angeles, Oct. 20, 2005

  8. SOML Casting & Cleanout Areas GSMT Committee, Los Angeles, Oct. 20, 2005

  9. Primary Mirror Off-axis Prototype GSMT Committee, Los Angeles, Oct. 20, 2005

  10. GMT1 Casting- 7/23/05 Peak T = 1160 C Currently T ~ 20 C GSMT Committee, Los Angeles, Oct. 20, 2005

  11. Steward Observatory Mirror Lab Test tower LOG LPM Stressed lap GSMT Committee, Los Angeles, Oct. 20, 2005

  12. Load-spreader Layout Doubles Quads Singles Triples GSMT Committee, Los Angeles, Oct. 20, 2005

  13. Triple Support Actuator Mirror Loadspreader Cell top plate Triple actuator GSMT Committee, Los Angeles, Oct. 20, 2005

  14. Predicted Performance Horizon pointing Specification: Ro=150 cm. Baseline actuator types are not ganged. Zenith pointing (no gravity sags). Specification: Ro= 214 cm. GSMT Committee, Los Angeles, Oct. 20, 2005

  15. Adaptive Optics Development • AO modes • Extreme (high-contrast, high SR, single object) AO (ExAO) • Ground Layer (wide-field) AO (GLAO) • Laser Tomography (all-sky, high Strehl-ratio, narrow field) AO (LTAO) • AO system components • AO secondary mirror • Laser guide star system • Optical Switch yard • AO wavefront sensors • Wavefront reconstructor(s) GSMT Committee, Los Angeles, Oct. 20, 2005

  16. Secondary Mirror GSMT Committee, Los Angeles, Oct. 20, 2005

  17. Laser Projection Beam Projector Na Laser beams (6) Laser House GSMT Committee, Los Angeles, Oct. 20, 2005

  18. AO Optical Switchyard GSMT Committee, Los Angeles, Oct. 20, 2005

  19. Magellan (Manqui) Campanas Pk. Alcaino Pk. Ridge (Manquis) LCO Sites GSMT Committee, Los Angeles, Oct. 20, 2005

  20. North Manquis (100”) Manqui (Magellan) NE Wind (80%) 2308 Alcaino (Nagoya) 2450 La Mollaca Alta 2410 5 km West Las Campanas 2726 2551 SW Wind (20%) Seeing Towers & weather stations: GSMT Committee, Los Angeles, Oct. 20, 2005

  21. Site Testing GSMT Committee, Los Angeles, Oct. 20, 2005

  22. DIMM Results from 4 Sites GSMT Committee, Los Angeles, Oct. 20, 2005

  23. Baseline Site Campanas PK. GSMT Committee, Los Angeles, Oct. 20, 2005

  24. GMT Site Layout from E GSMT Committee, Los Angeles, Oct. 20, 2005

  25. GMT viewed from SW GSMT Committee, Los Angeles, Oct. 20, 2005

  26. GMT (top view from N) GSMT Committee, Los Angeles, Oct. 20, 2005

  27. Conceptual Design Review • Topics • Science Case & Technical Requirements • Operations plan • Design & Feasibility studies for telescope & enclosure subsystems • Cost & schedule projections • Implementation plan • Date: February 21-23 • Location: Pasadena CA GSMT Committee, Los Angeles, Oct. 20, 2005

  28. GSMT Committee, Los Angeles, Oct. 20, 2005

  29. GMT Science Working Group GSMT Committee, Los Angeles, Oct. 20, 2005

  30. GMT Science Working Group • Warrick Couch Australia • Xiaohui Fan • Arizona • Karl Gebhardt • Texas • Gary Hill • Texas • John Huchra • Harvard • Scott Kenyon • Smithsonian • Pat McCarthy • Carnegie • Michael Meyer • Arizona • Alycia Weinberger • Carnegie/DTM GSMT Committee, Los Angeles, Oct. 20, 2005

  31. GMT SWG Reports • GMT for Dummies - • Science Case V 1.0 - 3.4 • GMT Overview - • Science Requirements Document V 2.4 • Site Selection Report V 3.4 • Joint Opportunities with GMT & ALMA V 2.0 • Operations Model V 1.0 • Science Case V 4.1 GSMT Committee, Los Angeles, Oct. 20, 2005

  32. GMT Science Requirements 1.High Level Science Goals 2. Definition of the Telescope and Related Facilities 3. Site Requirements 4. First Generation Instrument Specifications 5. Adaptive Optics Capabilities 6. Support Facilities 7. Operational Requirements 8. Image Size and Wave-Front Requirements GSMT Committee, Los Angeles, Oct. 20, 2005

  33. High Level Science Goals GSMT Committee, Los Angeles, Oct. 20, 2005

  34. GMT Instruments GSMT Committee, Los Angeles, Oct. 20, 2005

  35. Instrument Match to Science Goals GSMT Committee, Los Angeles, Oct. 20, 2005

  36. First Generation Instrument Candidates 1. Visible Multi-Object Spectrograph Four-Arm Double Spectrograph 18’ x 9’ FOV - VPH grisms - Transmission optics R ~ 3500 (red) & ~ 1200 (blue) primary mode higher and low R modes available Multiplexing factor ~ 500 - 1000 depending on mode GSMT Committee, Los Angeles, Oct. 20, 2005

  37. GMACS- Visible band MOS Shectman, et. al. GSMT Committee, Los Angeles, Oct. 20, 2005

  38. GMACS- Visible band MOS GSMT Committee, Los Angeles, Oct. 20, 2005

  39. First Generation Instrument Candidates 3. Near-IR Multi-Object Spectrograph Refractive Optics - Collimator-Camera Design 7’ x 7’ Imaging Field - 5’ x 7’ Spectroscopic R = 3200 & R = 1500 modes 10k x 6k detector mosaic q(80) < 0.15” - 0.067” pixels IFU mode under development GSMT Committee, Los Angeles, Oct. 20, 2005

  40. Instrument Mounting Flange Support Roller Interface Ring GMT NIRMOS Fabricant, et. al. GSMT Committee, Los Angeles, Oct. 20, 2005

  41. Instrument Platform 5.2 m 7.62 m Available Cassegrain Instrument Volume 6.35 m GMT NIRMOS GSMT Committee, Los Angeles, Oct. 20, 2005

  42. First Generation Instrument Candidates 5. High Resolution Near-IR Spectrograph Two Channels: 1 - 2.5mm Natural Seeing or AO 3 - 5mm Diffraction-Limited Silicon Immersion gratings R ~ 25-100k (JHK) & 100-150K (L&M) 4k x 4k HgCdTe FPAs GSMT Committee, Los Angeles, Oct. 20, 2005

  43. Near-IR High-resolution Spectrometer Short wavelength module: J, K, H Jaffe, et. al. GSMT Committee, Los Angeles, Oct. 20, 2005

  44. Rotator GLAO Guider Folded port instruments Gregorian instruments capacity 6.4 m Dia. 7.6 m high 25 ton GMT Instrument Platform (IP) GSMT Committee, Los Angeles, Oct. 20, 2005

  45. First Generation Instruments Second-Pass Instrument Development • Fibre-based spectrographs: Bragg Fibre OH suppression, massive multiplexing • Narrow-band imaging tuneable filters • Deployable IFUs diffraction-limit and coarse scales (GLAO?) GSMT Committee, Los Angeles, Oct. 20, 2005

  46. Adaptive Optics Goals First Generation AO Capabilities Extreme AO exoplanets, debris disks 2. Ground-Layer Correction faint galaxies, stellar populations, surveys 3. Laser Tomography morphological studies, dynamics GSMT Committee, Los Angeles, Oct. 20, 2005

  47. Adaptive Optics Goals Second Generation AO Capabilities Multi-Conjugate AO Stellar populations, Galactic taxonomy 2. Multi-Object AO faint galaxies, Stellar populations, Dynamics GSMT Committee, Los Angeles, Oct. 20, 2005

  48. Operation Principles • Maximize Scientific Output of Facility - Maximize Flexibility to Changing Conditions & Opportunities - Maximize Operating Efficiency • Minimize Operating Costs GSMT Committee, Los Angeles, Oct. 20, 2005

  49. Operating Modes • Classical PI Mode • Queue Service Observing • Target of Opportunity and Synoptic Observing • Campaign Mode GSMT Committee, Los Angeles, Oct. 20, 2005

  50. Operations Model “Flexible Assisted Observing” • Base Schedule in Blocks of PI, Queue & Campaign Time • Shared Nights • Preemption of Base Schedule in Response to Weather, Synoptic and TOO • Feed-Back loop for Tracking and Balancing Partner Time GSMT Committee, Los Angeles, Oct. 20, 2005

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