Preparing MIDI for science operations on Paranal Markus

VLTI • • All UT Coude trains UT 1 tip/tilt (STRAP) UT 2 and

Phases • Assembly, Integration, Verification (AIV), which ends with First Fringes • Commissioning under

Goals of Paranalization • Test the robustness of the instrument • Ensure operatibility of

MIDI - runs on the Unit Telescopes • first fringes obtained on December 15,

Identified problems • • OPD jumps Tunnel/light duct seeing M 2 return accuracy when

VLTI Data Flow System VINCI Templates OBs created with P 2 PP MIDI, AMBER

Call for Proposals - P 73 • Call for Proposals released on Sep 01,

Call for Proposals - Details • • UT 2/3 and UT 1/3 (April-June only)

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

VLTI open points • Final installation of Variable Curvature Mirrors (VCM) in the Delay

MIDI open points • • Grism Dispersed fringe tracking Use of all filters Integrate-then-read

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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 UT 1 tip/tilt (STRAP) UT 2 and UT 3 full AO (MACAO) Transfer Optics 3 Delay Lines VINCI MIDI Four staff astronomers, three fellows, several TIOs in Chile • SID commissioning finished

First Fringes General User Instruments

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

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

Paranal organigramm

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 P 73 (Apr 2004)

Identified problems • • OPD jumps Tunnel/light duct seeing M 2 return accuracy when chopping MIDI tracking on ghost (2% vs 40% visibility, ± 3. 5 mm from nominal OPD) on very bright objects

VLTI Data Flow System VINCI Templates OBs created with P 2 PP MIDI, AMBER Templates Extern. Verif. Modules DFS Hardware Visibility Calculator Web Calib. Selection ESOFORM/PHRS VINCI ETC MIDI, AMBER ETCs Scheduling VINCI QC Logs Automatic Reports MIDI AMBER: Calibration Database QC 1 Parameters On-Line VINCI Pipeline MIDI, AMBER Pipeline VINCI Data Releases VLTI FITS DICD VLT-SPE-ESO-15000 -2764 NGAST Update Web Archive Interface

Call for Proposals - P 73 • Call for Proposals released on Sep 01, 2003 • Proposal deadline on Oct 01, 2003 • Observing April September 2004

Call for Proposals - Details • • UT 2/3 and UT 1/3 (April-June only) Use of STRAP (tip/tilt) MIDI in low dispersion mode only (prism) Internal fringe tracking only Limiting flux of 5 Jy Limiting magnitude of V=16 (STRAP guiding) V~10% (no overlap compensation)

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

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 UT 1/4 and fine tuning • Auxiliary Telescopes

Instrument Operations Page

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