\u00a0<\/span><\/p>\nThe components of WEAVE have\u202frecently arrived in the Canary Islands, with the system currently undergoing testing before being integrated into the William Herschel Telescope; it will subsequently move on to the on-sky commissioning phase before the inception of a 1200-night survey that the instrument will perform over the next five years.\u202f\u202f<\/span>\u00a0<\/span><\/p>\nThe vital data collated by WEAVE \u2013 more than 12 million spectra \u2013 will be utilised to enrich the science return from the European Space Agencies\u202fMilky Way mapper.\u00a0<\/span>Of\u00a0particular note\u00a0is facilitating the mapping of the dark matter distribution in the Milky Way. As well as this, it will enable comprehensive examinations of the creation and development of galaxies across cosmic time, and the interactions between the stellar content of galaxies and their central black holes.<\/span>\u00a0<\/span><\/p>\nProfessor Scott Trager, WEAVE Project Scientist and chair of the WEAVE Survey Consortium, Kapteyn Astronomical Institute, University of Groningen<\/span>,<\/span>\u00a0commented: \u201cWe are very excited to see WEAVE reach this important milestone. WEAVE will provide tens of millions of spectra of stars and galaxies over the coming five years, and the WEAVE Survey will provide data that will help answer questions like how\u00a0did our galaxy form and the stars within it evolve, how were other galaxies assembled, and what are dark matter and dark energy?\u201d<\/span>\u00a0<\/span><\/p>\nUK involvement with WEAVE<\/span>\u00a0<\/span><\/h3>\nScientists in the UK have led the European\u00a0group\u00a0that has\u00a0designed\u00a0and produced\u00a0this key instrument, with fundamental leadership coming from the\u00a0University of Oxford and STFC RAL Space and with additional technology supplied by Liverpool John\u00a0Moores\u00a0University and a complex data processing pipeline development led by the University of Cambridge.<\/span>\u00a0<\/span><\/p>\nProfessor Gavin Dalton, WEAVE Principal Investigator, University of Oxford and STFC RAL Space, added: \u201cIt is tremendous to see the sustained efforts of so many groups of people finally coming together at the telescope, and to finally be able to bring the system to operation.<\/span>\u00a0<\/span><\/p>\n\u201cWEAVE has been\u00a0<\/span>10\u00a0<\/span>ten<\/span>\u00a0<\/span>years in development with lots of complex moving parts and components scattered in laboratories across Europe. With everything now at the telescope and operating correctly<\/span>,<\/span>\u00a0we are on the cusp of offering astronomers a new and improved eye on the stars.\u201d<\/span>\u00a0<\/span><\/p>\nWEAVE\u2019s installation\u00a0<\/span>\u00a0<\/span><\/h3>\nAfter installation efforts of over a year, with close to 100km of optical fibre assemblies, WEAVE’s fibre positioner has left the UK and has been tested and calibrated.<\/span>\u00a0<\/span><\/p>\nThe positioner can place full configurations of over 900 fibres in less than an hour by utilising its two high-speed industrial robots. Every fibre gathers light from an individual star or galaxy<\/span>,<\/span>\u00a0which is fed to the spectrograph.<\/span>\u00a0<\/span><\/p>\nThe WEAVE spectrograph has already been installed at the WHT. It has two arms, each with its own custom-built cryostat \u2013 a liquid-nitrogen refrigeration unit\u00a0<\/span>which\u00a0<\/span>that<\/span>\u00a0<\/span>will cool the detectors to help limit background \u2018noise\u2019, to generate much clearer spectra.<\/span>\u00a0<\/span><\/p>\nTesting has been conducted on the spectrograph and has yielded\u00a0<\/span>high\u00a0<\/span>high<\/span>–<\/span>quality images at all wavelengths from the ultra-violet to the far red. Each fibre can gather the light from a single star or galaxy.<\/span>\u00a0<\/span><\/p>\nAfter the instrument has been integrated, WEAVE\u2019s\u00a0on-sky commissioning\u00a0will commence. Following on from this will be science verification observations. Operated by the Isaac Newton Group of Telescopes, it will then begin\u00a0<\/span>the\u00a0<\/span>routine survey and\u00a0open-time\u00a0observing.<\/span>\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"The astronomical advancements\u202fbeing made to the William Herschel Telescope\u00a0that will facilitate a\u00a0thorough survey of the Universe\u00a0are close to finalisation.<\/p>\n","protected":false},"author":13,"featured_media":13149,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[771],"tags":[3477,809],"acf":[],"yoast_head":"\n
Novel upgrades to the William Herschel Telescope near completion\u00a0<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n \n \n\t \n\t \n\t \n