Photometric Mapping with ISOPHOT using the "P32" Astronomical Observation Template

Abstract

The ``P32'' Astronomical Observation Template (AOT) provided a means to map large areas of sky (up to 45x45 arcmin) in the FIR at high redundancy and with sampling close to the Nyquist limit using the ISOPHOT C100 (3x3) and C200 (2x2) detector arrays on board ISO. However, the transient response behaviour of the Ga:Ge detectors, if uncorrected, can lead to severe systematic photometric errors and distortions of source morphology on maps. Here we describe the basic concepts of an algorithm which can successfully correct for transient response artifacts in P32 observations. Examples are given demonstrating the photometric and imaging performance of ISOPHOT P32 observations corrected using the algorithm.

11 pages, Fig. 18 available only as gif file; invited talk presented at the ISOPHOT Workshop on P32 Oversampled Mapping (VILSPA, Spain, February 2001), to be published in the Proceedings