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Outputs (44)

Characterising modal noise in fibre-coupled spectrographs for astronomy (2010)
Presentation / Conference Contribution
Lemke, U., Corbett, J., Allington-Smith, J., & Murray, G. (2010, December). Characterising modal noise in fibre-coupled spectrographs for astronomy. Presented at Conference on Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation, San Diego, CA

Fibre modal noise occurs in high spectral resolution, high signal-to-noise applications. It imposes fundamental limits upon the photometric accuracy of state-of-the-art fibre-spectrograph systems. In order to maximize the performance of current and f... Read More about Characterising modal noise in fibre-coupled spectrographs for astronomy.

Strategies for spectroscopy on extremely large telescopes - III. Remapping switched fibre systems (2009)
Journal Article
Poppett, C., Allington-Smith, J., & Murray, G. (2009). Strategies for spectroscopy on extremely large telescopes - III. Remapping switched fibre systems. Monthly Notices of the Royal Astronomical Society, 399(1), 443-452. https://doi.org/10.1111/j.1365-2966.2009.15296.x

We explore the use of remapping techniques to improve the efficiency of highly multiplexed fibre systems for astronomical spectroscopy. This is particularly important for the implementation of diverse field spectroscopy (DFS) using highly multiplexed... Read More about Strategies for spectroscopy on extremely large telescopes - III. Remapping switched fibre systems.

Strategies for spectroscopy on Extremely Large Telescopes - II. Diverse-field spectroscopy (2009)
Journal Article
Murray, G., & Allington-Smith, J. (2009). Strategies for spectroscopy on Extremely Large Telescopes - II. Diverse-field spectroscopy. Monthly Notices of the Royal Astronomical Society, 399(1), 209-218. https://doi.org/10.1111/j.1365-2966.2009.15170.x

The fields of view of Extremely Large Telescopes will contain vast numbers of spatial sampling elements (spaxels) as their adaptive optics systems approach the diffraction limit over wide fields. Since this will exceed the detection capabilities of a... Read More about Strategies for spectroscopy on Extremely Large Telescopes - II. Diverse-field spectroscopy.

Optical ground support equipment for the alignment of JWST-NIRSpec (2008)
Presentation / Conference Contribution
Schmoll, J., Basden, A., Bramall, D., Clark, P., Cole, R., Dodsworth, G., Goodsell, S., McCalden, A., Murray, G., Myers, R., Sharples, R., Tandy, J., & Thomas, P. (2008, August). Optical ground support equipment for the alignment of JWST-NIRSpec. Presented at Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter, Marseille, France

The alignment of the JWST NIRSpec spectrograph will use a customised set of optical light sources, imagers and wavefront sensors, which form part of the Optical Ground Support Equipment (OGSE). This has been developed by the Mullard Space Science Lab... Read More about Optical ground support equipment for the alignment of JWST-NIRSpec.

FMOS: the fiber multiple-object spectrograph: Part VI. Onboard performances and results of the engineering observations (2008)
Presentation / Conference Contribution
Iwamuro, F., Maihara, T., Akiyama, M., Kimura, M., Tamura, N., Takato, N., Tait, P., Ohta, K., Eto, S., Moritani, Y., Dalton, G., Lewis, I., Lee, H., Tosh, I., Froud, T., Murray, G., Blackburn, C., Bonfield, D., Gillingham, P., Smedley, S., …Frost, G. (2008, July). FMOS: the fiber multiple-object spectrograph: Part VI. Onboard performances and results of the engineering observations. Presented at Ground-based and Airborne Instrumentation for Astronomy II, Marseille, France

Design and construction of the fibre system for FMOS (2008)
Presentation / Conference Contribution
Murray, G., Dodsworth, G., Content, R., & Tamura, N. (2008, July). Design and construction of the fibre system for FMOS. Presented at Ground-based and Airborne Instrumentation for Astronomy II, Marseille, France

A consortium of Japanese, Australian and UK groups has developed a fibre-fed near IR (J & H band) multi-object spectrographic facility (FMOS) for the Subaru telescope. In this second-generation instrument, a novel prime focus 400-fibre multi-object p... Read More about Design and construction of the fibre system for FMOS.

Cryogenic tests of volume-phase holographic gratings: results at 100 K. (2006)
Journal Article
Tamura, N., Murray, G., Luke, P., Blackburn, C., Robertson, D., Dipper, N., …Allington-Smith, J. (2006). Cryogenic tests of volume-phase holographic gratings: results at 100 K. Applied optics, 45(23), 5923-5928. https://doi.org/10.1364/ao.45.005923

We present results from cryogenic tests of volume-phase holographic (VPH) gratings at ∼100  K∼100  K. The aims of these tests are to see whether the diffraction efficiency as a function of wavelength is significantly different at a low temperature fr... Read More about Cryogenic tests of volume-phase holographic gratings: results at 100 K..

FMOS - the fiber multiple-object spectrograph IV: current status of OHS-based spectrograph (2006)
Presentation / Conference Contribution
Iwamuro, F., Maihara, T., Ohta, K., Eto, S., Sakai, M., Akiyama, M., Kimura, M., Tamura, N., Noumaru, J., Karoji, H., Dolton, G., Lewis, I., Tosh, I., Murray, G., Dipper, N., Robertoson, D., Gillingham, P., Smedley, S., Smith, G., & Frost, G. (2006, June). FMOS - the fiber multiple-object spectrograph IV: current status of OHS-based spectrograph. Presented at Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series