SCUBA-2: on-sky calibration using submillimetre standard sources
SCUBA-2 is a 10000-bolometer submillimetre camera on the James Clerk Maxwell Telescope (JCMT). The instrument commissioning was completed in September 2011, and full science operations began in October 2011. To harness the full potential of this powerful new astronomical tool, the instrument calibra...
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| creator | Dempsey, Jessica T Friberg, Per Jenness, Tim Tilanus, Remo P J Thomas, Holly S Holland, Wayne S Bintley, Dan Berry, David S Chapin, Edward L Chrysostomou, Antonio Davis, Gary R Gibb, Andrew G Parsons, Harriet Robson, E Ian |
| description | SCUBA-2 is a 10000-bolometer submillimetre camera on the James Clerk Maxwell Telescope (JCMT). The instrument commissioning was completed in September 2011, and full science operations began in October 2011. To harness the full potential of this powerful new astronomical tool, the instrument calibration must be accurate and well understood. To this end, the algorithms for calculating the line-of-sight opacity have been improved, and the derived atmospheric extinction relationships at both wavebands of the SCUBA-2 instrument are presented. The results from over 500 primary and secondary calibrator observations have allowed accurate determination of the flux conversion factors (FCF) for the 850 and 450 micron arrays. Descriptions of the instrument beam-shape and photometry methods are presented. The calibration factors are well determined, with relative calibration accuracy better than 5 per cent at 850 microns and 10 per cent at 450 microns, reflecting the success of the derived opacity relations as well as the stability of the performance of the instrument over several months. The sample-size of the calibration observations and accurate FCFs have allowed the determination of the 850 and 450 micron fluxes of several well-known submillimetre sources, and these results are compared with previous measurements from SCUBA. |
| doi_str_mv | 10.48550/arxiv.1301.3773 |
| format | Article |
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The instrument commissioning was completed in September 2011, and full science operations began in October 2011. To harness the full potential of this powerful new astronomical tool, the instrument calibration must be accurate and well understood. To this end, the algorithms for calculating the line-of-sight opacity have been improved, and the derived atmospheric extinction relationships at both wavebands of the SCUBA-2 instrument are presented. The results from over 500 primary and secondary calibrator observations have allowed accurate determination of the flux conversion factors (FCF) for the 850 and 450 micron arrays. Descriptions of the instrument beam-shape and photometry methods are presented. The calibration factors are well determined, with relative calibration accuracy better than 5 per cent at 850 microns and 10 per cent at 450 microns, reflecting the success of the derived opacity relations as well as the stability of the performance of the instrument over several months. The sample-size of the calibration observations and accurate FCFs have allowed the determination of the 850 and 450 micron fluxes of several well-known submillimetre sources, and these results are compared with previous measurements from SCUBA.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1301.3773</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Algorithms ; Astronomical instruments ; Bolometers ; Calibration ; Fluxes ; Opacity ; Photometry ; Physics - Instrumentation and Methods for Astrophysics ; Sky</subject><ispartof>arXiv.org, 2013-01</ispartof><rights>2013. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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The sample-size of the calibration observations and accurate FCFs have allowed the determination of the 850 and 450 micron fluxes of several well-known submillimetre sources, and these results are compared with previous measurements from SCUBA.</description><subject>Algorithms</subject><subject>Astronomical instruments</subject><subject>Bolometers</subject><subject>Calibration</subject><subject>Fluxes</subject><subject>Opacity</subject><subject>Photometry</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><subject>Sky</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj89LwzAcxYMgOObunqTgOfWbb5I29eQcToWBB-e5pE0imf0xk1bcf2_nhAfv8B6P9yHkikEqlJRwq8OP_04ZB5byPOdnZIacM6oE4gVZxLgDAMxylJLPyP3b6v1hSfEu6TsaPw9JrRtfBT34vkvG6LuPJI5V65vGt3YINomD7owOJon9GGobL8m50020i3-fk-36cbt6ppvXp5fVckO1ZILmNRNGqSoDqWoD4CoEiQIscO3qjE0ZFLnShcqEEYUTbpJgVhaVNkw4PifXp9k_unIffKvDoTxSlkfKqXBzKuxD_zXaOJS76WA3XSoRlFDIEQX_BcsYU7U</recordid><startdate>20130116</startdate><enddate>20130116</enddate><creator>Dempsey, Jessica T</creator><creator>Friberg, Per</creator><creator>Jenness, Tim</creator><creator>Tilanus, Remo P J</creator><creator>Thomas, Holly S</creator><creator>Holland, Wayne S</creator><creator>Bintley, Dan</creator><creator>Berry, David S</creator><creator>Chapin, Edward L</creator><creator>Chrysostomou, Antonio</creator><creator>Davis, Gary R</creator><creator>Gibb, Andrew G</creator><creator>Parsons, Harriet</creator><creator>Robson, E Ian</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20130116</creationdate><title>SCUBA-2: on-sky calibration using submillimetre standard sources</title><author>Dempsey, Jessica T ; Friberg, Per ; Jenness, Tim ; Tilanus, Remo P J ; Thomas, Holly S ; Holland, Wayne S ; Bintley, Dan ; Berry, David S ; Chapin, Edward L ; Chrysostomou, Antonio ; Davis, Gary R ; Gibb, Andrew G ; Parsons, Harriet ; Robson, E Ian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a514-7c14d88b6058cd00fb205240e03afc61d880978a9864d49f4ff4f41e59bad14f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Algorithms</topic><topic>Astronomical instruments</topic><topic>Bolometers</topic><topic>Calibration</topic><topic>Fluxes</topic><topic>Opacity</topic><topic>Photometry</topic><topic>Physics - Instrumentation and Methods for Astrophysics</topic><topic>Sky</topic><toplevel>online_resources</toplevel><creatorcontrib>Dempsey, Jessica T</creatorcontrib><creatorcontrib>Friberg, Per</creatorcontrib><creatorcontrib>Jenness, Tim</creatorcontrib><creatorcontrib>Tilanus, Remo P J</creatorcontrib><creatorcontrib>Thomas, Holly S</creatorcontrib><creatorcontrib>Holland, Wayne S</creatorcontrib><creatorcontrib>Bintley, Dan</creatorcontrib><creatorcontrib>Berry, David S</creatorcontrib><creatorcontrib>Chapin, Edward L</creatorcontrib><creatorcontrib>Chrysostomou, Antonio</creatorcontrib><creatorcontrib>Davis, Gary R</creatorcontrib><creatorcontrib>Gibb, Andrew G</creatorcontrib><creatorcontrib>Parsons, Harriet</creatorcontrib><creatorcontrib>Robson, E Ian</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dempsey, Jessica T</au><au>Friberg, Per</au><au>Jenness, Tim</au><au>Tilanus, Remo P J</au><au>Thomas, Holly S</au><au>Holland, Wayne S</au><au>Bintley, Dan</au><au>Berry, David S</au><au>Chapin, Edward L</au><au>Chrysostomou, Antonio</au><au>Davis, Gary R</au><au>Gibb, Andrew G</au><au>Parsons, Harriet</au><au>Robson, E Ian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SCUBA-2: on-sky calibration using submillimetre standard sources</atitle><jtitle>arXiv.org</jtitle><date>2013-01-16</date><risdate>2013</risdate><eissn>2331-8422</eissn><abstract>SCUBA-2 is a 10000-bolometer submillimetre camera on the James Clerk Maxwell Telescope (JCMT). The instrument commissioning was completed in September 2011, and full science operations began in October 2011. To harness the full potential of this powerful new astronomical tool, the instrument calibration must be accurate and well understood. To this end, the algorithms for calculating the line-of-sight opacity have been improved, and the derived atmospheric extinction relationships at both wavebands of the SCUBA-2 instrument are presented. The results from over 500 primary and secondary calibrator observations have allowed accurate determination of the flux conversion factors (FCF) for the 850 and 450 micron arrays. Descriptions of the instrument beam-shape and photometry methods are presented. The calibration factors are well determined, with relative calibration accuracy better than 5 per cent at 850 microns and 10 per cent at 450 microns, reflecting the success of the derived opacity relations as well as the stability of the performance of the instrument over several months. 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| subjects | Algorithms Astronomical instruments Bolometers Calibration Fluxes Opacity Photometry Physics - Instrumentation and Methods for Astrophysics Sky |
| title | SCUBA-2: on-sky calibration using submillimetre standard sources |
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