Spettroscopia astronomica con i grandi telescopi ESO: da X

Lo spettrografo X-SHOOTER,
un’occasione per la comunità
astronomica italiana
Paolo Spanò
INAF-O.A.Brera
(on behalf of the X-SHOOTER team)
X-SHOOTER
The X-Shooter team: S. D’Odorico (PI), R. Pallavicini (Co-PI), F.M. Zerbi, P.
Spanò, V. De Caprio, M. Riva, M. Tintori, E. Molinari, P. Di Marcantonio, P.
Santin, R. Cosentino, P. Bruno, P.K. Rasmussen, L. Kaper, H. Dekker and many
others…
Teramo - SAIt 2008
P. Spanò
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Primary science case
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Stellar astrophysics
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Cosmic explosions
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Brown dwarfs, star formation, close binaries, stellar
remnants
Supernovae Ia progenitors, GRBs
High-z universe
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Faint emission-line galaxies, primordial star formation,
metal enrichment in early universe, tomography of
IGM
Teramo - SAIt 2008
P. Spanò
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Primary
top level requirements
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Single object
Large simultaneous spectral coverage
Deep objects
Intermediate resolution
Rapid response
Ideally suited for unknown or transient objects
Teramo - SAIt 2008
P. Spanò
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X-shooter…
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Very Efficient Spectrograph
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Wide Band
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Atmospheric cut-off to NIR (300-2500 nm)
Complete wavelength range in one shot (no gaps!)
Intermediate Resolution
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>25% all included in all the spectral range
R= 7000-12000 with 0.6” slit
Single Object - Small Field
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Variable slit widths
IFU
Teramo - SAIt 2008
P. Spanò
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…and friends
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P. Spanò
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Characteristics
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Spectral format:
Prism cross-dispersed echelle
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Wavelength range:
300-2500 nm
UVB: 300-550
VIS: 550-1000
NIR: 1000-2500
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Spectral resolution:
5000 (UVB, NIR),
7000 (VIS) for 1” slit
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Slits/Image slicer:
12”x1” (standard)
12”x0.6” (high-res)
12”x5” (flux calibr.) IFU
4”x1.8” -> 12”x0.6” (3 slices)
Teramo - SAIt 2008
P. Spanò
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Schematic view
Teramo - SAIt 2008
P. Spanò
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The backbone
N. Christensen (DK)
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Holds
spectrographs
in place (high
stiffness)
Hosts pre-slit
optics,
calibration,
A&G, shutter
N. Michaelsen (DK)
Teramo - SAIt 2008
P. Spanò
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Acquisition and Guiding Unit
Pellicle
IFU
3-pos mirror
A&G Camera
P. Spanò (I), A. Soerensen (Dk), H.Dekker(ESO)
Teramo - SAIt 2008
P. Spanò
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Pre-slit plate
P. Spanò (I), N.Michaelsen (Dk),R. Mazzoleni (ESO)
Teramo - SAIt 2008
P. Spanò
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Automatic Flexure Compensation System
Piezos
R. Mazzoleni (ESO)
Teramo - SAIt 2008
P. Spanò
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Optical design
4C Optical Concept
Teramo - SAIt 2008
P. Spanò
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Gratings and prisms
All new rulings
Teramo - SAIt 2008
P. Spanò
A. De Ugarte Postigo (I)
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Detectors
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UVB:
VIS:
NIR:
2K x 4K E2V CCD
2K x 4K MIT/LL CCD
2K x 2K Rockwell Hawaii 2RG MBE
(used area 1K x 2K)
Teramo - SAIt 2008
P. Spanò
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VIS first light
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Optical and mechanical tests
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P. Spanò
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Performances
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Teramo - SAIt 2008
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Italian GTO program: 45 nights!
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Elaborated by 6 Science Panels
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Star formation, T Tauri stars, Brown Dwarfs (Alcalà)
Stellar populations, Abundances, and Dynamics
(Randich)
Supernovae (Benetti)
Gamma Ray Bursts (Fiore)
High-Z Universe, Galaxies and AGNs (Cimatti)
Absorbers and IGM (Cristiani)
Teramo - SAIt 2008
P. Spanò
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Some examples
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Legacy program in galactic star forming regions
(PI J. Alcalà, 12 nights requested)
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Characterizing pre-main sequence stars in LMC
(PI Randich, 3 nights)
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Spectroscopic classifications of Sne discovered with the LBC
(PI Cappellaro, 4 nights)
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GRB prompt afterglow-spectroscopy (RRM and ToO modes
required!)
Optical-NIR spectra of QSO close to reionization (z~6)
(PI V. D’Odorico, 3+3 nights)
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Tomography of IGM with multiple QSO line of sight
(PI. Cristiani, 3 nights)
Teramo - SAIt 2008
P. Spanò
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THE END
Teramo - 4 Maggio 2008
Paolo Spanò
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