| Issue |
A&A
Volume 410, Number 3, November II 2003
|
|
|---|---|---|
| Page(s) | 1075 - 1088 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20030899 | |
| Published online | 17 November 2003 | |
Photometric mapping with ISOPHOT using the “P32” Astronomical Observation Template *
1
Astrophysics Division, Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
2
ISO Data Centre, Astrophysics Division, ESA, Villafranca del Castillo, PO Box 50727, 28080 Madrid, Spain e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
(Now at XMM-Newton Science Operations Centre, ESA, Villafranca del Castillo, PO Box 50727, 28080 Madrid, Spain.)
Corresponding author: R. J. Tuffs, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
22
April
2003
Accepted:
9
June
2003
Abstract
The “P32” Astronomical Observation Template (AOT) provided a means to
map large areas of sky (up to 
arcmin) in the
far-infrared (FIR) at
high redundancy and with sampling close to the Nyquist limit
using the ISOPHOT C100 (
) and C200 (
)
detector arrays on board the Infrared Space Observatory (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.
We describe the basic concepts of an algorithm which can
successfully correct for transient response artifacts in P32 observations.
Examples are given to demonstrate the photometric and imaging performance
of ISOPHOT P32 observations of point and extended sources corrected using the
algorithm. For extended sources we give the integrated flux densities of
the nearby galaxies NGC 6946, M 51 and M 101. and an image of M 101
at 100
.
Key words: methods: data analysis / techniques: photometric / infrared: general
Based on observations with ISO, an ESA project with instruments funded by ESA member states (especially the P/I countries France, Germany, The Netherlands and the UK) with participation of ISAS and NASA.
© ESO, 2003
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