Photometric investigation of the ISOPHOT C100 minimap mode

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

As a possible concept to improve further the photometric accuracy of ISOPHOT we propose to concentrate on well-defined homogeneous data sets extracted from the Archive and carry out investigations focused on the specific calibration issues of the sample. The improvement of the photometric quality and that of the final error are monitored by selecting and evaluating secondary standards from the sample. In this contribution we describe the proposed general scheme and present -- as an example -- the analysis of 354 minimap observations of normal stars obtained at 60, 90 and 100μm with the C100 detector. In the analysis first we determine measurement uncertainties characteristic of the OLP V10 data processing, and then check the improvements achieved by introducing the newly developed dynamic transient correction.

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