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SUMMARY:WEAVE: Science\, design\, and first light - Scott Trager\, Kapteyn
  Astronomical Institute\, University of Groningen
DTSTART:20230511T150000Z
DTEND:20230511T160000Z
UID:TALK198376@talks.cam.ac.uk
CONTACT:Dr. David Murphy
DESCRIPTION:WEAVE is the next-generation wide-field survey facility for th
 e William Herschel Telescope (WHT). WEAVE will provide the instrument requ
 ired for full scientific exploitation of the Gaia\, LOFAR\, and APERTIF su
 rveys in the Northern Hemisphere. WEAVE is a multi-object and multi-integr
 al-field-unit (IFU) facility utilizing a large\, new 2-degree-diameter pri
 me focus corrector at the WHT with a pick-and-place fibre positioner syste
 m hosting nearly 1000 multi-object fibres or 20 mini-IFUs for each observa
 tion\, or a single wide-field IFU. The fibres are fed into a dual-beam spe
 ctrograph located in the GHRIL enclosure on the WHT's Nasmyth platform. Th
 e spectrograph records nearly 1000 spectra simultaneously at a resolution 
 of R ~ 5000 over an instantaneous wavelength range of 366-959 nm or at a r
 esolution of R ~ 20000 over two more-limited wavelength ranges. WEAVE has 
 been on sky since late 2022. The WEAVE Survey will provide complete phase-
 space coordinates of roughly 3 million stars in the northern sky selected 
 with ESO’s Gaia satellite\, chemical analysis of more than 1 million sta
 rs from Gaia\, half a million massive stars in the Galactic Plane\, distan
 ces and properties of galaxies selected from the low-frequency radio-wave 
 surveys being conducted with LOFAR\, “three-dimensional" spectroscopy of
  galaxies selected from surveys using the new Apertif focal plane array at
  WSRT\, and deep surveys of galaxy clusters and moderate-redshift galaxies
 . In this talk I will discuss the motivation\, design\, construction\, and
  commissioning of WEAVE and the impressive “first-light” and Science V
 erification data we’ve already collected with it.
LOCATION:Hoyle Lecture Theatre - Details will be sent by email
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