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Table 1

Summary of point spread functions of IRC.

N2 N3 N4 S7 S9W S11 L15 L18W L24

Reference wavelength [μm] 2.4 3.2 4.1 7.0 9.0 11.0 15.0 18.0 24.0
# of postage stamps useda 168 114 43 45 28 24 56 66 43
FWHM (pixel)b 2.96 3.06 2.84 2.27 2.19 2.10 2.27 2.48 2.92
Aperture radius (pixel) 2 2 2 3 3 3 3 3 3
Aperture correction factorsc 1.97 1.96 1.95 1.18 1.21 1.25 1.42 1.53 1.70
Pixel scale 1.46 × 1.46 2.34 × 2.34 2.51 × 2.39

Notes. 

(a)

The number of stacked postage stamp images for PSF creation.

(b)

FWHM computed using the enclosed flux radial profile.

(c)

Correction factors for fluxes.

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