INSTRUMENTATION/ OID / L. Pasquini/ 1 ___________________________________________________ _________ FLAMES • COORDINATION AND INTERFACES. FIELD CORRECTOR. CALIBRATION UNIT (ESO) • FIBRE POSITIONER (AAO and Mt. Stromlo) • GIRAFFE: Fibres, Spectrograph Mechanics (Meudon) , Optics, Gratings, Control Electronics & SW, Detector, Integration, Testing (ESO) • DATA REDUCTION & ANALYSIS (Geneve- Lausanne) • FIBRE LINK TO UVES (ESO-Meudon- ITALConsortium) • SUPER-OS and OPERATIONS (ESO, ITAL Consortium)
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INSTRUMENTATION/ OID / L. Pasquini/ 1 ____________________________________________________________ FLAMES COORDINATION AND INTERFACES. FIELD CORRECTOR.
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INSTRUMENTATION/ OID / L. Pasquini/ 1 ____________________________________________________________
FLAMES
• COORDINATION AND INTERFACES. FIELD CORRECTOR. CALIBRATION UNIT (ESO)
perpendicular to dispersion • Fixed setups (22 HR,8 LR) 370-950nm• Radial velocity specs: 1% resolution for
V>17.5 G stars
INSTRUMENTATION/ L. Pasquini ____________________________________________________________
FLAMES
Link to UVES RED ARM Link to UVES RED ARM
• HARDWARE modifications to UVES implemented.
• 3 Standard UVES RED Setups (520, 580, 860 nm)
• R ~ 45000
• Separation: 1.7 arcsec; contamination < 5 %
• 8 Objects (eventually 1 to sky, no default sky fibre)
• 7 Objects + 1 Simultaneous calibration (Accurate radial velocities)
• 6 Objects (Overlap between orders at the blue edge, below 480 nm)
• Efficiency: 50-60% of the UVES RED standard mode
INSTRUMENTATION/ L. Pasquini ____________________________________________________________
FLAMES
FLAMES OBSERVING MODES FLAMES OBSERVING MODES
• MEDUSA (GIRMED)
• IFU (GIRIFU)
• ARGUS (GIRARG)
• UVES (UVES)
• UVES Simultaneous (UVES_SIM)
• Combined UVES + MEDUSA (COMMED)
• Combined UVES + IFU (COMIFU)
• Combined UVES + Argus (COMARG)
INSTRUMENTATION/ L. Pasquini ____________________________________________________________
FLAMES
CALIBRATIONS CALIBRATIONS
• Calibrations should be taken in day-time to maximize observations
• STANDARD Calibrations with Positioner: Fibre-Fibre transmission < 2%, Pixel-Pixel variations < 0.5 % , taken in day-time.
• STANDARD Calibrations will not need to be defined by users
• For GIRAFFE: all spectra will have 5 fibres dedicated to simultaneous Th-A
• If STANDARD calibrations not enough: “Attached” FF calibrations with Nasmyth screen illumination system, BUT night time
• Very large number of possible set-ups (Giraffe: 30*5=150; UVES: 3*4=12) : limited number of setups/night, fixed configurations.
INSTRUMENTATION/ L. Pasquini ____________________________________________________________
FLAMES
LIMITATIONS and WARNINGS LIMITATIONS and WARNINGS
• ASTROMETRY!
• a) better than ~0.3 arcsec relative
• b) VLT Guide star and Fiducial (FACBs) stars in the same astrometric system as targets
• ATMOSPHERE! Differential refraction and dispersion (although positioner will position the fibre at the postion corresponding to middle of the exposure)
• Calibrations: limited number (4-5) of setups / night
• FIXED setups: (e.g. not tunable wavelength domain, no choice of CCD settings, no choice of echelle order, resolving power….)
• Short exposures --> low duty cycles
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
Installation and commissioning beginning of October 2001
Nasmyth illumination system January 2002
L. Pasquini April 2002
CORRECTOR
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
All Fibres have been delivered to ESO and mounted on Oz Poz.
5 fibres (out of 1200) were damaged and were repaired.
L. Pasquini April 2002
FIBRE SYSTEM
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
After PAA, Oz Poz integrated in Paranal and COMM1 took place end March 2002
Quite successful, accuracy plate geometry 0.001, problem with R encoder and friction due to
lower temperature at Paranal; will be fixed in June 2002.
L. Pasquini April 2002
OZ POZ INTEGRATION COMM 1
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
On March 31 acquisition first 7 spectra of giants in O Cen. Exposures
of 5, 10 and 10 minutes last made with FLAMES OS. R=47000
Operating whole night from Control Room. Reduced with DRS on the spot
L. Pasquini April 2002
FIRST LIGHT UVES FIBRES March 31
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
After first laboratory light on Dec 16, PAE was granted to Giraffe in March 2002
+ Very good resolving power and image quality, Resolution, Calibrations for all 30 setups
- Lower efficiency (Blue); H-R grating under spec, will be replaced as soon as possible
L. Pasquini April 2002
GIRAFFE PAE March 2002
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
L. Pasquini April 2002
GIRAFFE FIRST LIGHT JULY 2, MEDUSA, 60 fibres, 543.1 nm, R=6000
VLT INSTRUMENTATION STC 53, April 24-25,2002
FLAMES
Long Way to go… Fix the Positioner Robot Complete Fibre Mounting & HW Fine Tuning Giraffe Plate Geometry at 10-4
Functioning FACBs Positioner Calibration Unit Characterize UVES Characterize Giraffe …...
GIRAFFE re-integrated on platform and tested (2 weeks). No major problems
NEXT COMMISSIONING RUN (Oz Poz , Oz Poz + UVES, GIRAFFE) August 18 Sept. 3