Image Details
Caption: Fig. 2.
Azimuthally averaged radial profiles of Cen A in comparison to the PSF. Solid lines represent the galaxy, while dotted lines represent the 3 σ upper and lower limit in the PSF FWHM size based on the total standard deviation of the PSFs at each wavelength. These images represent a comparison of the fully stacked galaxy data (33.3 minutes on‐source at 8.8 μm, left; 25.8 minutes on‐source for 18.3 μm, right) compared to a stack of all PSFs that were taken between galaxy observations. The dash‐dotted line represents the measurement of Cen A at 8.8 μm from Fig. 2 of K03. Our 3 σ upper on the PSF is very close to their single PSF measurement. Thus, their 0.17﹩\arcsec﹩ size measurement is likely due to seeing.
© 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.