SPHERE IRDIS Narrow Band PSFs and Ghosts
The following narrow band filters in IRDIS produce ghosts in their images because of internal reflections:
N_PaB
N_H2
N_CntK1
N_CntK2
N_BrG
N_CO
N_FeII
N_HeI
N_CntH
N_CntJ
Saturated and unsaturated images of a point source are shown below to help identify the locations of the ghosts. Also included below are links to FITS files for the images.
FITS files and images
Click on the link above to download the FITS files and PDF images as a tarball.
N_PaB: zoomed-in images on the right. Saturated images at the bottom.
N_H2: zoomed-in images on the right. Saturated images at the bottom.
N_CntK1: zoomed-in images on the right. Saturated images at the bottom.
N_CntK2: zoomed-in images on the right. Saturated images at the bottom.
N_BrG: zoomed-in images on the right. Saturated images at the bottom.
N_CO: zoomed-in images on the right. Saturated images at the bottom.
N_FeII: zoomed-in images on the right. Saturated images at the bottom.
N_HeI: zoomed-in images on the right. Saturated images at the bottom.
N_CntH: zoomed-in images on the right. Saturated images at the bottom.
