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Outputs (39)

The HR image slicer for GNIRS at Gemini North: optical design and performance (2022)
Presentation / Conference Contribution
Calcines Rosario, A., Dubbeldam, C. M., Sharples, R., Bourgenot, C., Diaz, R., & Stephens, A. W. (2022). The HR image slicer for GNIRS at Gemini North: optical design and performance. In C. J. Evans, J. J. Bryant, & K. Motohara (Eds.), Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; SPIE Astronomical Telescopes + Instrumentation. https://doi.org/10.1117/12.2626235

GNIRS (Gemini Near-InfraRed Spectrograph) is a multi-function spectrograph at Gemini North telescope offering four observational modes in the spectral range of 0.8 to 5.4 µm. It provides 2-pixel spectral resolutions from 1,200 up to 18,0000 and has s... Read More about The HR image slicer for GNIRS at Gemini North: optical design and performance.

New opportunities of freeform gratings using diamond machining (2018)
Presentation / Conference Contribution
Bourgenot, C., Calcines, A., & Sharples, R. M. (2018). New opportunities of freeform gratings using diamond machining. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312040

With the recent development of new ultra fine aluminium alloys and progress in the field of directly machined freeform surfaces, diamond machined freeform gratings could play an important part in future spectrographs or integral field units, particul... Read More about New opportunities of freeform gratings using diamond machining.

Design of freeform diffraction gratings: performance, limitations and potential applications (2018)
Presentation / Conference Contribution
Calcines, A., Bourgenot, C., & Sharples, R. M. (2018). Design of freeform diffraction gratings: performance, limitations and potential applications. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312125

Spectroscopy is a key technique in astronomy and nowadays most major telescopes include at least one spectrograph in their instrument suite. The dispersive element is one of the most important components and it defines the pupil size, spectral resolu... Read More about Design of freeform diffraction gratings: performance, limitations and potential applications.

Multiple Integral Field Spectroscopy (2002)
Presentation / Conference Contribution
Wright, G., Ivison, R., Hastings, P., Wells, M., Sharples, R., Allington-Smith, J., & Content, R. (2002). Multiple Integral Field Spectroscopy.

A Million Element Integral Field Unit (MEIFU) (2002)
Presentation / Conference Contribution
Morris, S., Content, R., Sharples, R., Bower, R., Davies, R., & Baugh, C. (2002). A Million Element Integral Field Unit (MEIFU). In Scientific Drivers for ESO Future VLT/VLTI Instrumentation: Proceedings of the ESO Workshop Held in Garching, Germany, 11-15 June 2001 (99-107). https://doi.org/10.1007/10857019_16

We describe an instrument concept that will provide simultaneous spectra for a million spatial samples on the sky. With the proposed field of view and spectral resolution, it will be able to measure redshifts and line strengths for around 2-4000 z∼∼3... Read More about A Million Element Integral Field Unit (MEIFU).

Ages and Metallicities of Globular Clusters in NGC 4472. (2002)
Presentation / Conference Contribution
Beasley, M., Sharples, R., Bridges, T., Hanes, D., Zepf, S., Ashman, K., & Geisler, D. (2002). Ages and Metallicities of Globular Clusters in NGC 4472. In D. P. Geisler, E. K. Grebel, & D. Minniti (Eds.), Extragalactic star clusters: proceedings of the 207th Symposium of the IAU held in Pucón, Chile, 12-16 March 2001

We have derived ages and metallicities from co-added spectra of 131 globular clusters (GCs) associated with the giant Virgo elliptical NGC 4472. From their metal-line indices, we find that our sample of GCs span a metallicity range of approximately -... Read More about Ages and Metallicities of Globular Clusters in NGC 4472..

IGER Bacon R., et al., 1995, A&AS, 113, 347 (2002)
Presentation / Conference Contribution
Bacon, R., Adam, G., Cabrit, S., Combes, F., Davies, R., Emsellem, E., …de Zeeuw, P. (2002). IGER Bacon R., et al., 1995, A&AS, 113, 347.

Intracluster Planetary Nebulae in the Virgo Cluster (2000)
Presentation / Conference Contribution
Freeman, K., Arnaboldi, M., Capaccioli, M., Ciardullo, R., Feldmeier, J., Ford, H., …Sharples, R. (2000). Intracluster Planetary Nebulae in the Virgo Cluster.

Clusters of Galaxies, X-Rays, and Dark Matter (1999)
Presentation / Conference Contribution
Burke, D., Collins, C., Nichol, R., Romer, A., Reichart, D., Holden, B., …Sharples, R. (1999). Clusters of Galaxies, X-Rays, and Dark Matter.

A Wide-Field K-Band Galaxy Survey (1997)
Presentation / Conference Contribution
Gardner, J., Sharples, R., Baugh, C., Frenk, C., & Carrasco, B. (1997). A Wide-Field K-Band Galaxy Survey. In G. A. Mamon, X. T. Trinh, & J. . T. V. Tran (Eds.), Extragalactic Astronomy in the Infrared. = Astronomie extragalactique dans l'infrarouge: proceedings of the XVIIth Rencontres de Moriond, Les Arcs, France, March 15-22, 1997

A Search for distant X-ray galaxy clusters (1996)
Presentation / Conference Contribution
Burke, D., Collins, C., Nichol, R., Romer, A., Holden, B., Sharples, R., & Ulmer, M. (1996). A Search for distant X-ray galaxy clusters.

The AAT 2dF Project - Current Status (1993)
Presentation / Conference Contribution
Gray, P., Taylor, K., Parry, I., Lewis, I., & Sharples, R. (1993). The AAT 2dF Project - Current Status.

Deep WFC Imaging of the z=0.3 Cluster AC114 (1992)
Presentation / Conference Contribution
Sharples, R., Smail, I., Ellis, R., Couch, W., Fitchett, M., & Jørgensen, H. (1992). Deep WFC Imaging of the z=0.3 Cluster AC114.

AUTO FIB Current Status (1988)
Presentation / Conference Contribution
Parry, I., & Sharples, R. (1988). AUTO FIB Current Status.