Exoplanet atmospheres

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WTS1 b: The first planet detected in the WFCAM Transit Survey

EPJ Web of Conferences EDP Sciences 47 (2013) 01003

Authors:

M Cappetta, RP Saglia, JL Birkby, J Koppenhoefer, DJ Pinfield, ST Hodgkin, P Cruz, G Kovács, B Sipőcz
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J-band variability of M dwarfs in the WFCAM Transit Survey

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 427:4 (2012) 3358-3373

Authors:

NT Goulding, JR Barnes, DJ Pinfield, G Kovács, J Birkby, S Hodgkin, S Catalán, B Sipőcz, HRA Jones, C del Burgo, SV Jeffers, S Nefs, M-C Gálvez-Ortiz, EL Martin
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On the potential of the EChO mission to characterise gas giant atmospheres

(2012)

Authors:

Joanna K Barstow, Suzanne Aigrain, Patrick GJ Irwin, Neil Bowles, Leigh N Fletcher, Jae-Min Lee
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The first planet detected in the WTS: an inflated hot Jupiter in a 3.35 d orbit around a late F star⋆

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 427:3 (2012) 1877-1890

Authors:

M Cappetta, RP Saglia, JL Birkby, J Koppenhoefer, DJ Pinfield, ST Hodgkin, P Cruz, G Kovács, B Sipőcz, D Barrado, B Nefs, YV Pavlenko, L Fossati, C del Burgo, EL Martín, I Snellen, J Barnes, A Bayo, DA Campbell, S Catalan, MC Gálvez-Ortiz, N Goulding, C Haswell, O Ivanyuk, HR Jones, M Kuznetsov, N Lodieu, F Marocco, D Mislis, F Murgas, R Napiwotzki, E Palle, D Pollacco, L Sarro Baro, E Solano, P Steele, H Stoev, R Tata, J Zendejas
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15x optical zoom and extreme optical image stabilisation: Diffraction limited integral field spectroscopy with the SWIFT spectrograph

Proceedings of SPIE - The International Society for Optical Engineering 8446 (2012)

Authors:

M Tecza, N Thatte, F Clarke, J Lynn, D Freeman, J Roberts, R Dekany

Abstract:

When commissioned in November 2008 at the Palomar 200 inch Hale Telescope, the Oxford SWIFT I&z band integral field spectrograph, fed by the adaptive optics system PALAO, provided a wide (3x) range of spatial resolutions: three plate scales of 235 mas, 160 mas, and 80 mas per spaxel over a contiguous field-of-view of 89x44 pixels. Depending on observing conditions and guide star brightness we can choose a seeing limited scale of 235 mas per spaxel, or 160 mas and 80 mas per spaxel for very bright guide star AO with substantial increase of enclosed energy. Over the last two years PALAO was upgraded to PALM-3000: an extreme, high-order adaptive optics system with two deformable mirrors with more than 3000 actuators, promising diffraction limited performance in SWIFT's wavelength range. In order to take advantage of this increased spatial resolution we upgraded SWIFT with new pre-optics allowing us to spatially Nyquist sample the diffraction limited PALM-3000 point spread function with 16 mas resolution, reducing the spaxel scale by another factor of 5x. We designed, manufactured, integrated and tested the new pre-optics in the first half of 2011 and commissioned it in December 2011. Here we present the opto-mechanical design and assembly of the new scale changing optics, as well as laboratory and on-sky commissioning results. In optimal observing conditions we achieve substantial Strehl ratios, delivering the near diffraction limited spatial resolution in the I&z bands. © 2012 SPIE.
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