COMICS camera filters

The following table lists the filters available in the camera section of COMICS, together with their sensitivities (noise equivalent flux densities). All sensitivities are for 1 sigma detections in 1 second of background-limited on-source integration. Extended source sensitivities are per arcsec2.

Important: Sensitivities assume chopping only; limiting fluxes will be sqrt(2) times higher if chopping and nodding are required. You must read the information on Overheads and observing technique before planning your observations.

Filter Wavelength (μm) Sensitivity (1sig 1sec) Diffraction
limit(1)
Centre Width (mJy) (mJy/arcsec2)
N-band continuum filters
N7.8 7.8     0.7 88(2) TBD 0.24
N8.8 8.8     0.8 67 420 0.27
N9.7 9.7     0.9 41 320 0.29
N10.5 10.5     1.0 58 550 0.32
N11.7 11.7     1.0 25 300 0.36
N12.4 12.4     1.2 55 680 0.38
N-band narrow filters
UIR8.6 8.59     0.42 29 520 0.26
ArIII 8.98     0.13 35 590 0.28
SIV 10.46     0.16 40 680 0.32
UIR11.2 11.24     0.60 32 530 0.35
NeII 12.81     0.21 75 1200 0.39
Q-band filters
Q17.7 17.7     0.9 320 610 0.54
Q18.8 18.8     0.9 360 580 0.58
Q20.5 20.5     0.9 730 1100 0.63
Q24.5 24.6     0.8 1300 1800 0.75

(1) The diffraction-limited image size (θ = 1.22*λ/D, in arcseconds) for an 8.2-m telescope (i.e. D = 8.2 m).

(2) Tentative (to be confirmed)

July 2010



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