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http://hdl.handle.net/20.500.12386/24116
Titolo: | The Return of the Mid-infrared to the VLT: News from the VISIR Upgrade | Autori: | Käufl, H. U. Kerber, F. Asmus, D. Baksai, P. Di Lieto, N. Duhoux, P. Heikamp, S. Hummel, C. Ives, D. Jakob, G. Kirchbauer, J. -P. Mehrgan, L. AL MOMANY, YAZAN Pantin, E. Pozna, E. Riquelme, M. Sandrock, S. Siebenmorgen, R. Smette, A. Stegmeier, J. Taylor, J. Tristram, K. Valdes, G. van den Ancker, M. Weilenmann, U. Wolff, B. |
Data pubblicazione: | 2015 | Rivista: | THE MESSENGER | Numero: | 159 | Da pagina:: | 15 | Abstract: | The VLT mid-infrared imager and spectrometer VISIR returns to science operations following an extended upgrade period. Among the most important modifications are: the imaging and spectroscopic detectors have been replaced with larger AQUARIUS (1024 by 1024 pixel) detector arrays; the N-band low-resolution grating has been exchanged; and support is now provided for precipitable water vapour monitoring, in order to select the best observing conditions. The AQUARIUS detectors stem from a development for very low background applications which result in excess noise under ground-based conditions. A series of interventions was needed to find a scheme that effectively exploits these detectors for ground-based use, involving the implementation of faster chopping. VISIR has been returned to service at the VLT with enhanced capabilities. | URI: | http://hdl.handle.net/20.500.12386/24116 | URL: | https://www.eso.org/sci/publications/messenger/toc.html?v=159&m=Mar&y=15 https://www.eso.org/sci/publications/messenger/archive/no.159-mar15/messenger-no159-15-18.pdf |
ISSN: | 0722-6691 | Bibcode ADS: | 2015Msngr.159...15K | Fulltext: | open |
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