CFHT, Instruments, Detectors, IR, CFHT-IR, Performances.

## CFHT-IR## Performances |

Figure 1: CFHT-IR limiting magnitudes per square arcsecond as a function of the total integration time for extended sources (SN = 5). Click here for a printable version of the Figure.

Figure 2: CFHT-IR limiting magnitudes reached for point-like sources in 1 hour total integration time at SN = 5. A seeing value of 0.7" at 0.5 microns (median value for Mauna Kea) has been considered. The photometry is derived on an aperture corresponding to 1.2 x the seeing FWHM at the given wavelength. For true point sources, PSF-fitting photometry gives significantly better limiting sensitivity (by about 0.3 magnitude) than the procedure described here. Click here for a printable version of the Figure.

Figure 3: Evolution of the CFHT-IR limiting magnitudes as a function of the seeing value at 0.5 microns. The photometry is derived on an aperture corresponding to 1.2 x the seeing FWHM. Total integration time is 1 hour at S/N = 5 in the K' band. Click here for a printable version of the Figure.

Figure 4: Evolution of the CFHT-IR limiting magnitudes as a function of the diameter of the aperture used for photometry. Total integration time is 1 hour at S/N = 5 in the K' band, but the scalings between different apertures obviously are valid for any integration time and filter. Click here for a printable version of the Figure.

Page created by Jean-Luc Beuzit and maintained by Thierry Forveille.

Please send comments to: