LIFU (Large integral-field unit)

Characteristics

· LIFU overview
· Geometry of the LIFU fibre array
· Acquisition, guiding and dithering
· Spectroscopy with LIFU
· Numbering of fibres on detector
· Light path through WEAVE/LIFU
· Throughput, and SNR calculator
· Star counts, counts from stars
· WEAVE vs ISIS (LP TN 137)

Applying for time

· WEAVE open-time
· Open-time calendar
· PROGTEMP, OBSTEMP

Observing

· Observing, calibration
· Format of FITS files, headers
· Access to data products

More about WEAVE

· WEAVE instrument overview
· Data-flow poster
· WEAVE-project pages
· WEAVE science surveys
· First light
· Inauguration ceremony

For ING staff (intranet)

· LIFU observing recipe
· Night plans / reports
· WEAVE commissioning
· WEAVE comm. tests, leaders
· Selected WEAVE comm. results
· FITS headers ICS-011
· WEAVE fault reports
· Non-WEAVE faults / launcher
· Other useful WEAVE links

WEAVE LIFU (Large Integral-field Unit)

WEAVE's Large Integral-Field Unit (LIFU) provides spectroscopy over a hexagonal field of view 90 arcsec x 78 arcsec.

The main science array comprises 547 fibres, each having a diameter on the sky of 2.6 arcsec. Each fibre yields one spectrum on the WEAVE (blue-arm and red-arm) science detectors. The spectroscopic resolution is R ~ 2500 with the low-resolution VPHs, and R ~ 10000 with the high-resolution VPHs.

The LIFU mode of WEAVE was commissioned in early 2023, and survey and open-time LIFU science observations began in October 2023.

Information about applying for open-time observations (33% of the total WEAVE time on the telescope) can be found here.

Chris Benn, Lilian Domínguez, Cecilia Fariña