LDT Facility Instrument – Available Full-Time, Remote Available
Mounting Port: Instrument Cube – Port C (large)
Manual: DeVeny User Manual (10 July 2018)
Additional Information: DeVeny Gratings / Filters / Lamps, DeVeny_Ops_Appendix.tar
Instrument Scientist: Tom Bida (tbida at lowell dot edu)
The DeVeny Spectrograph is a moderate resolution optical spectrograph working between 3200 Å and 1 µm. R ranges between 500 and 4000 depending upon the grating used. The DeVeny spectrograph was built and known at Kitt Peak National Observatory (KPNO) as the KPNO White Spectrograph, and had a long career at the 36" telescope there before being retired. Lowell Observatory acquired the spectrograph from KPNO on indefinite loan in 1998. A new CCD camera was built for it, and the instrument was further modified for installation on the 72” Perkins telescope in 2005. Following 8 years of service there, it was removed in 2013 for upgrades for installation on the LDT. The DeVeny spectrograph has been in use on the instrument cube since February 2015.
There are currently 10 gratings available for use. Five have recently been made available thanks to a long term loan from KPNO and have not yet been well characterized at the LDT. Note that swapping the grating remains a daytime operation to minimize risk.
Instrument Quick Facts:
Detector: e2v CCD42-10 deep depletion device: 2048x512 13.5µm pixels (27.65 mm x 6.91 mm).
Slit Length: 2.5'
Pixel Scale: 0.34"/pixel (spatial direction)
Gain: 1.52 e-/ADU
Read Noise: 3.2 ADUs, about 4.9 e-
Normal Operating Temperature: -110ºC
Linearity: TBD
Readout Time: 8 s
Dark Current: TBD
Fringing: 1-3% fringe amplitudes, redward of 8000 Å
Slit Viewing Camera:
Model: Lodestar X2 by Starlight Xpress
Pixel Scale: 0.253"/pixel (binned 2x2)
Image Size: 376 × 290 pixels
Field of View: 95" × 73"