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Home > Astronomy > Telescope Operator Notes > Working with WEAVE |
WEAVE
WEAVE (WHT Enhanced Area Velocity Explorer) is a new multi-object survey spectrograph for the 4.2-m William Herschel Telescope (WHT) at the Observatorio del Roque de los Muchachos, on La Palma in the Canary Islands. It will allow astronomers to take optical spectra of up to ~1000 targets over a two-degree field of view in a single exposure (MOS), or to carry out integral-field spectroscopy using 20 deployable mini integral-field units (mIFUs) or one large fixed integral-field unit (LIFU). WEAVE's fibre-fed spectrograph comprises two arms, one optimised for the blue and one for the red, and offers two possible spectroscopic resolutions, 5000 and 20,000.
On September 11 2020, ING celebrated WEAVE PFC first light, after images of Vega were obtained with the acquisition camera. WEAVE construction is funded by STFC, NOVA, NWO, ING, IAC, MINECO, INAF, INSU, Observatoire de Paris, île de France, INAOE, Lund Observatory, Uppsala University, AIP, MPIA, University of Pennsylvania, and Konkoly Observatory. At the moment (September 2020) the optical performance of the PFC mounted at the WHT's Prime Focus is being verified on-sky using the ING's Shack-Hartmann (SH). Startup
TCS:
Filling the cryostat:
(4) Lock the telescope in EL and in AZ with the two interlock keys on the main control panel. (Make an entry in the logbook). (5) From the gallery, place the dewar and the ladder in place on the left side of the positioner. (6) Fill the detector. (7) Remove and lay down the ladder. Separate the dewar from the positioner. (8) Unlock the telescope in the control room. (Write down the time of filling and sign off in the logbook). (9) Move the telescope back to park zenith by clicking on ZP in the TCS display, located at R1 (the rack number 1, left-hand side from the TO workstation). Initialisation of the FTUs: Movement of target using XY HANDSET keys: +------+ | | | | | <-- | | | +------+------+------+ | | | | ^ | | | | | | | | | | --> | | | | v | | | | +------+------+------+SH - TEK2 +------+ | | | | | | | | | | v | +------+------+------+ | | ^ | | | | | | | | <-- | | | --> | | | | | | +------+------+------+TWFC1 +------+ | | | | | <-- | | | +------+------+------+ | | | | ^ | | | | | | | | | | --> | | | | v | | | | +------+------+------+ Notes
The Operations team have confirmed it�s not possible (at least, at the moment) to do the PRIME FOCUS ROTATOR (WEAVE) ZEROSET if it doesn�t need to be done.
Should you need to unscrew the panels in the positioner (black cube at prime), an Allen key M5 is required. See also
Shack-Hartmann - notes for occasional users (last updated: 20201026)Observing notes, on-sky SH tests (last updated: 20200922) WEAVE Faults Instructions for the tracking test (last updated 20201127, provided by Frank Gribbin) (bear in mind that you can do:
Instructions for sliding the SH assembly (last updated: 20200922) |
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