We present an update on the overall construction progress of the WEAVE next-generation spectroscopy facility for the William Herschel Telescope (WHT), now that all the major fabrication contracts are in place. We also present a summary of the current planning behind the 5-year initial phase of survey operations, and some detailed end-to-end science simulations that have been effected to evaluate the final on-sky performance after data processing. WEAVE will provide optical ground-based follow up of ground-based (LOFAR) and space-based (Gaia) surveys. WEAVE is a multi-object and multi-IFU facility utilizing a new 2-degree prime focus field of view at the WHT, with a buffered pick-and-place positioner system hosting 1000 multi-object (MOS) fibres, 20 integral field units, or a single large IFU for each observation. The fibres are fed to a single (dual-beam) spectrograph, with total of 16k spectral pixels, located within the WHT GHRIL enclosure on the telescope Nasmyth platform, supporting observations at R~5000 over the full 370-1000nm wavelength range in a single exposure, or a high resolution mode with limited coverage in each arm at R~20000. The project has experienced some delays in procurement and now has first light expected for the middle of 2019.
Gavin Dalton, Scott Trager, Don Carlos Abrams, Piercarlo Bonifacio, J. Alfonso L. Aguerri, Antonella Vallenari, Kevin Middleton, Chris Benn, Kevin Dee, Frédéric Sayède, Ian Lewis, Johannes Pragt, Sergio Picó, Nicholas Walton, Jeurg Rey, Carlos Allende, Émilie Lhomé, David Terrett, Matthew Brock, James Gilbert, Andy Ridings, Marc Verheijen, Ian Tosh, Iain Steele, Remko Stuik, Gabby Kroes, Neils Tromp, Jan Kragt, Dirk Lesman, Chris Mottram, Stuart Bates, Frank Gribbin, José Alonso Burgal, Jose Miguel Herreros, Jose Miguel Delgado, Carlos Martin, Diego Cano, Ramón Navarro, Mike Irwin, James Lewis, Eduardo Gonzales Solares, Neil O'Mahony, Andrea Bianco, Christina Zurita, Rik ter Horst, Emilio Molinari, Marcello Lodi, José Guerra, Andrea Baruffolo, Esperanza Carrasco, Szigfrid Farkas, Ellen Schallig, Vanessa Hill, Dan Smith, Janet Drew, Bianca Poggianti, Mat Pieri, Shoko Jin, Lilian Dominquez Palmero, Cecilia Fariña, Adrian Martin, Clare Worley, David Murphy, Andrea Hidalgo, Shan Mignot, Georgia Bishop, Steve Guest, Eddy Elswijk, Menno de Haan, Hiddo Hanenburg, Bernardo Salasnich, Divakara Mayya, Rafael Izazaga-Pérez, and Luis Peralta de Arriba, "Construction progress of WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope," Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107021B (Presented at SPIE Astronomical Telescopes + Instrumentation: June 13, 2018; Published: 23 July 2018); https://doi.org/10.1117/12.2312031.
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