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Preparing MIDI for science operations on Paranal

Preparing MIDI for science operations on Paranal. Markus Schöller Jean-Gabriel Cuby, Sebastien Morel, Andrea Richichi. Schloss Ringberg, September 03, 2003. VLTI. All UT Coude trains UT1 tip/tilt (STRAP) UT2 and UT3 full AO (MACAO) Transfer Optics 3 Delay Lines VINCI MIDI

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Preparing MIDI for science operations on Paranal

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  1. Preparing MIDI for science operations on Paranal Markus Schöller Jean-Gabriel Cuby, Sebastien Morel, Andrea Richichi Schloss Ringberg, September 03, 2003

  2. VLTI • All UT Coude trains • UT1 tip/tilt (STRAP) • UT2 and UT3 full AO (MACAO) • Transfer Optics • 3 Delay Lines • VINCI • MIDI • Four staff astronomers, three fellows, several TIOs in Chile • SID commissioning finished

  3. First Fringes  General User Instruments

  4. Phases • Assembly, Integration, Verification (AIV), which ends with First Fringes • Commissioning under the responsibility of the Instrument Team • “Paranalization” under the responsibility of ESO • Science Demonstration Time • Open Time with Guaranteed Time

  5. Goals of Paranalization • Test the robustness of the instrument • Ensure operatibility of the instrument in the science operations group • Verify instrumental performance and magnitude limits

  6. Paranal organigramm

  7. MIDI - runs on the Unit Telescopes • first fringes obtained on December 15, 2002 • comm 1 in February 2003 • comm 2 in May 2003 • paranalization, GTO/SDT in June 2003 • paranalization in August and September 2003 • SDT in November 2003 • comm 3 in December 2003 • paranalization and GTO/SDT in January/February 2004 • science operations will start in P73 (Apr 2004)

  8. Identified problems • OPD jumps • Tunnel/light duct seeing • M2 return accuracy when chopping • MIDI tracking on ghost (2% vs 40% visibility, ±3.5mm from nominal OPD) on very bright objects

  9. VLTI Data Flow System VINCI Templates OBs created with P2PP MIDI, AMBER Templates Extern. Verif. Modules DFS Hardware Visibility Calculator Web Calib. Selection ESOFORM/PHRS VINCI ETC MIDI, AMBER ETCs Scheduling VINCI Data Releases VLTI FITS DICD VLT-SPE-ESO-15000-2764 NGAST Update Web Archive Interface VINCI QC Logs Automatic Reports MIDI AMBER: Calibration Database QC1 Parameters On-Line VINCI Pipeline MIDI, AMBER Pipeline

  10. Call for Proposals - P73 • Call for Proposals released on Sep 01, 2003 • Proposal deadline on Oct 01, 2003 • Observing April - September 2004

  11. Call for Proposals - Details • UT2/3 and UT1/3 (April-June only) • Use of STRAP (tip/tilt) • MIDI in low dispersion mode only (prism) • Internal fringe tracking only • Limiting flux of 5Jy • Limiting magnitude of V=16 (STRAP guiding) • V~10% (no overlap compensation)

  12. Proposal Preparation I • http://www.eso.org/instruments/midi/ • Check objects against MIDI GTO list

  13. VLTI open points • Final installation of Variable Curvature Mirrors (VCM) in the Delay Lines • Delay Line Metrology upgrade • Close the FINITO loop • MACAO installation on UT1/4 and fine tuning • Auxiliary Telescopes

  14. Instrument Operations Page

  15. MIDI open points • Grism • Dispersed fringe tracking • Use of all filters • Integrate-then-read (ITR) mode • External fringe tracking • Spatial filters • Acquisition of complex objects

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