---+++ TMAS Visible Light AO Instrument Observing Candidate Observing Modes ---++++ Note all numbers on this page has yet to be verified! ---+++++ TMAS cameras * Andor = 1k x 1k, Fast-frame (30 Hz) enabled, photon-counting option, 13 um pixel * CCD21 = 1k x 1k, Mature science GUI (from DBSP), ?? um pixel ---+++++ TMAS foci * F/43 (TBC), 1.193 mm/" or 0.8385 "/mm (TBC), goal is 12 mas/pixel on Andor * F/15 (TBC), goal is 48 mas/pixel on CCD21, physical diffraction width = lambda * F# = 0.6 * 15 = 9 um (TBC) ---+++++ AO modes * S64 = 64 x 64 subaperture AO correction, limiting mag R ~ 7 provides 0.6um SR ~ 10%, 0.8um SR ~ 20%, FWHM < 0.2" at 35" off-axis * S32 = 32 x 32 subaperture AO correction, limiting mag R ~ 10 provides visible FWHM < 0.2" on-axis, ~0.3" at 35" off-axis * S8 = 8 x 8 subaperture AO correction, limiting mag R ~ 17 provides visible FWHM ~ 0.4" on- or off-axis ---+++++ AO beamsplitters * 50/50 beamsplitter * 80/20 visible (trans/refl) + long pass beyond 970nm (TBC) * 650 nm long pass * 750 nm long pass (TBC) * 970 nm long pass ---+++++ TMAS observing modes | *Mode Number* | *AO config* | *F/43 focus* | *F/11 focus* | *Science Case* | | 1 | S64 | Imaging filter | Acquisition | 12 mas/pixel imaging for all visible wavelengths | | ^ | ^ | ^ | ^ | AO-assisted speckle (Lucky) imaging (Hildebrandt)| | ^ | ^ | ^ | ^ | Lowest R imaging of faintest targets | | 2 | S64 or S32 | Imaging filter 1 | Imaging filter 2 | Dual-color photometry on different plate scales | | ^ | ^ | ^ | ^ | Narrow field PSF reference for wider-field astrometry | | ^ | ^ | ^ | ^ | Scattered light subtraction for extragalactic emission line science (Dekany) | | 3 | S64 or S32 | Flexure and exp. meter | Single-mode fiber | 10 cm/s precision radial velocity for exoplanet study (Johnson) | | ^ | > 650nm for WFS | < 500nm for Andor | feeding precision RV spectrograph (need to identify) | ^ | | 4 | S32 or S64 | Flexure compensation | Imaging filter 2 | Deep (long-exposure) visible imagery / galaxy morphology / UDF | | ^ | ^ | ^ | ^ | Red-channel coronagraphy (e.g. Serabyn (vortex coronagraphy)) | | 5 | S8 | TBD | GLAO w/ ~0.3" FWHM across moderate field | Astrometry survey / identification of transients contexts | | ^ | ^ | ^ | across visible wavelength | ^ | | 6 | S8 | Flexure & DAR | Dual, scrambled multi-mode fiber | 5 m/s RV of close (<2") binary stars (Johnson) | | ^ | ^ | compensation | w/ one on 2-axis stage | ^ |
This topic: Palomar/TMAS
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Topic revision: r3 - 2011-09-02 - RichardDekany
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