The large number of scientific observations in the ISO archive reveals considerable systematics in the detector behaviour, which can be used to improve the data reduction process.
Previous work on IRAS observations showed inhomogen- eities ("clumping") to be present in the wind of some early- type stars. To study this in more detail, we obtained ISOPHOT data at 60, 90 and 160 m for 1 LBV, 2 B-type stars and 5 Wolf-Rayets. The …
We apply the P32Tools model for the C100 detector to staring observations. We find that the model does not correctly treat large downward flux steps.
We have used the C100 camera of the ISOPHOT instrument to obtain ~ 80 maps around both hot and cool stars, using the AOTs PHT 22 and PHT 32. Extracting the faint fluxes from the strong background requires considerable care in the data reduction. We …