pns/specifications.html

Final specifications for the Planetary Nebula Spectrograph

DATA FROM P.O. REPORT 37

Fcoll = 1290.6 mm
Fcam = 286.9 mm
TNG is f/10.755
WHT is f/10.942

CCD

The design assumed 15 um pixels but detectors with 13.5 um pixel size were in fact used during commissioning at the WHT. The following table assumes a 2048x4096 detector with 13.5 um pixels, oriented with the short axis along the dispersion direction.

INSTRUMENT

PARAMETERS AT THE TELESCOPE

WHT TNG
Telescope diam: 4200 mm 3500 mm
Focal station: f/10.942 cass f/10.755 nasmyth
Collimated beam: 117.9 mm 120.0 mm
Dispersion (pxl/A): 1.29 1.29
Scale (pxl/arcsec)
      in dispersed direction: 3.32 2.72
      in spatial direction: 3.67 3.01
Nominal field size (dispersed x spatial) (arcmin): 11.43 x 10.34 13.95 x 12.59
   
As commissioned (2150 x 2500) (arcmin): 10.79 x 11.35

PERFORMANCE