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Cassegrain upgrades

Cassegrain upgrades. UIST Controller upgrade: EDICT replaced by ARC Improved performance in all modes; Full-array readout in thermal bands. BEFORE. AFTER. 1kx 1k 4-point mosaic M’ (4.8 microns) Original readout method Saturated toward centre of array. 1kx 1k 4-point mosaic

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Cassegrain upgrades

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  1. Cassegrain upgrades UIST Controller upgrade: EDICT replaced by ARC Improved performance in all modes; Full-array readout in thermal bands BEFORE AFTER 1kx 1k 4-point mosaic M’ (4.8 microns) Original readout method Saturated toward centre of array 1kx 1k 4-point mosaic M’ (4.8 microns) Row-reset readout No saturation More headroom, so Improved sensitivity

  2. Cassegrain Upgrades Full commissioning of UIST coronagraphic imaging and imaging polarimetry o Slot 1 e o Slot 2 e Target behind the wider (1.3 arcsecond) occulting wire

  3. Radial Profile Null Profile (psf-psf) Cassegrain Science Highlights • First Science Use of Coronagraphic Imaging Polarimetry • Wisniewski et al. 2008 in prep • Herbig Ae proroplanetary disk: HD 163296 • Variable outer structure in HST optical coronagraphy • UIST Coronagraphic Polarimetry: subarcsecond disk structure

  4. Cassegrain Science Highlights • UIST Narrow-Band Imaging and Long-slit spectroscopy • Irwin et al. 2008 in prep • First data taken with new ARC controller • Uranus cloud circulation spectroscopy and context imaging • Cloud feature discovered at 200-400mBar level Uranus + Moon – UIST imaging, CH4 filter Uranus + Moons + cloud Cloud spectrum modelled with cloud layer at 200-400mbar

  5. UKIDSS UKIDSS LAS passes z=6 for QSOs UKIDSS + SDSS izYJ (initial candidate list) LT I (remove M dwarfs) UKIRT YJ (confirm high QSO probability) 8-m spectroscopy (final confirmation & z) Gemini-S / GMOS Warren et al. 2008 in prep

  6. UKIDSS Zoomable mosaic of the GPS http://surveys.roe.ac.uk:8080/wsa/gps_mosaic.jsp

  7. Campaigns • U/CMP/1 - Coma Cluster of Galaxies (Mouhcine) - 12 nights • U/CMP/2 - WFCAM Transit Survey (Hodgkin, Pinfield) - 200 nights • U/CMP/3 - High-z Elliptical Galaxies (Best, Smail) – 45 nights • U/CMP/4 – GRB monitoring (Tanvir) – 235 hours Total time allocations All but U/CMP/1 are under way.

  8. Campaigns Example: U/CMP/3 (HIZELS) – looking for H-alpha at z~2 Geach et al. 2008 in prep.

  9. Campaigns Example: U/CMP/3 (HIZELS) – looking for H-alpha at z~2 Geach et al. 2008 in prep.

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