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Ott, S., Gastaud, R., Guest, S., Delaney, M., Sauvage, M., Ali, B., Okumura, K., & Miville-Deschênes, M.-A. 2001, in ASP Conf. Ser., Vol. 238, Astronomical Data Analysis Software and Systems X, eds. F. R. Harnden, Jr., F. A. Primini, & H. E. Payne (San Francisco: ASP), 170
CIA V5.0--the Legacy Package for ISOCAM Interactive Analysis
S. Ott
ISO Data Centre, Astrophysics Division, Space Science Dept. of
ESA, Villafranca, P.O. Box 50727, 28080 Madrid, Spain
R. Gastaud
DAPNIA/SEI-SAP, CEA/Saclay, F-91291 Gif sur Yvette Cedex, France
B. Ali1,
M. Delaney2,
M-A. Miville-Deschênes3,
K. Okumura4,
M. Sauvage5 &
S. Guest6
Abstract:
The ISOCAM Interactive Analysis System (CIA) (Ott et al. 1997; Delaney 2000)
was developed to support the calibration of ISOCAM, (Cesarsky et al. 1996) the
infrared camera on board ESA's Infrared Space Observatory (ISO) (Kessler et
al. 1996) and to perform its astronomical data processing.
The development, a collaborative effort involving several
institutes, was led by ESA and began in mid-1994. Currently the
system is used by 70 institutes, including the ISO Data Centre
at VilSpa and the CAM consortium.
CIA is generally available to the astronomical community and runs,
using IDL
5,under DEC VMS Alpha, Solaris, DEC Unix, Debian (PC) Linux
and HP/UX. CIA can be
obtained
electronically.
With the end of ISO's post-operational phase in December 2001, the
legacy version, CIA V5.0, will be released.
We present the latest calibration results and algorithmic
improvements, give examples of CIA's current data processing
capabilities and outline the foreseen scope of the legacy version.
The ISOCAM Interactive Analysis System
(CIA)13 was developed to support the calibration and operation
of ISOCAM, the infrared camera on board of ESA's Infrared Space Observatory
(ISO)14.
The system is mainly IDL-based. CPU intensive tasks are coded in C++ and
FORTRAN. It consists of 250,000 lines of code, 150MB of
documentation and 80MB of calibration products.
Currently the main effort is spent on improving the system's functionalities in
processing ISOCAM astronomical data without compromising its ability to
continue dedicated calibration analysis. As the next version 5.0 will be the
legacy version, purging of obsolete routines and upgrading the documentation is
also a priority.
The latest algorithmic improvements for ISOCAM include:
sky-cube deglitching, a very powerful technique to reject the
effects of cosmic ray impacts for datasets with highly redundant pointings (a
sky pixel has been observed several times) (Ott et al. 2000);
improved distortion correction, including circular variable
filters, and an improved projection algorithm, resulting in higher
quality mosaics (see Figures 1 & 2);
dedicated treatment of solar system objects;
improved error propagation;
improved deglitching for strong point sources;
use of distorted PSFs for simulations;
revision and upgrade of photometric tools; and
use of improved pointing information.
Major foreseen system improvements (apart from bug-fixes and the purging of
obsolete routines) are:
improved on-line help:
new HTML based help and search for multiple topics;
multiple copies for widgets;
tool to recalibrate ISOCAM astrometry for wheel jitter; and
upgrade to IDL V5.4.
Figure:
ISOCAM raster observation of HIC96441 at 4.5
. The star has been
observed 81 times crossing the whole detector. Left image: Resulting mosaic
without distortion correction. Right image: Previous distortion correction.
![\begin{figure}
\epsscale{1.0}
\plottwo{P2-23a.eps}{P2-23b.eps}
\end{figure}](img2.gif) |
Figure:
Mosaic of HIC96441 using the new distortion correction. Note the
better reconstruction of the PSF.
![\begin{figure}
\epsscale{0.8}
\plotone{P2-23c.eps}
\end{figure}](img3.gif) |
The following contributed packages are expected to be delivered together with
CIA V5.0:
- BESD. Baseline Extraction and Sky
Deglitching is a tool to extract very faint sources for observations with
many redundant pointings (Metcalfe et al. in preparation);
- PRETI. Pattern REcognition Technique for
ISOCAM is a tool using multiresolution analysis for faint source processing
(Starck et al. 1999);
- SLICE V1.0. Simple and Light ISO CAM
Environment is a powerful tool to correct ISOCAM's long-term transient and
variable flat-field (Miville-Deschênes et al. 2000);
- ISOCAM Parallel processing package. This package is tailored to analyse
CAM parallel data (Ott et al. in preparation).
Acknowledgments
We would like to thank our many contributors:
A. Abergel, B. Altieri, J.-L. Auguéres, H. Aussel, J-P. Bernard, A. Biviano,
J. Blommaert, O. Boulade, F. Boulanger, C. Cesarsky, D. Cesarsky, P. Chanial,
V. Charmandaris, R-R. Chary, A. Claret, A. Coulais, C. Delattre,
F-X. Désert, T. Deschamps, P. Didelon, D. Elbaz, Y. Fuchs, P. Gallais,
K. Ganga, G. Helou, M. Heemskerk, M. Kong, F. Lacombe, D. Landriu, O. Laurent,
P. Le Coupanec, J. Li, L. Metcalfe, M. Perault, A. Pollock, P. Roman,
D. Rouan, M. Rupen, J. Sam Lone, R. Siebenmorgen, J-L. Starck, D. Tran,
R. Tuffs, D. Van Buren, L. Vigroux, F. Vivares, T. Võ and H. Wozniak.
References
Cesarsky, C., et al. 1996, A&A, 315, L32
Delaney, M. ed. 2000,
ISOCAM Interactive Analysis User's Manual, Version
4.0,
ESA Document Reference Number SAI/96-5226/Dc
Kessler, M., Steinz, J. A. et al. 1996, A&A, 315, L27
Miville-Deschênes, M-A., et. al. 2000, A&AS, 146, 519
Ott, S., et al. 1997, in ASP Conf. Ser., Vol. 125, Astronomical Data Analysis
Software and Systems VI, ed. G. Hunt & H. E. Payne
(San Francisco: ASP), 275
Ott, S., Metcalfe L., & Pollock, A. 2000,
in ASP Conf. Ser., Vol. 216, Astronomical Data
Analysis Software and Systems IX, ed. N. Manset, C. Veillet, &
D. Crabtree (San Francisco: ASP), 543
Starck, J-L., et al. 1999, A&AS, 138, 365
Footnotes
- ... Ali1
- Infrared Processing and Analysis Center, JPL and Caltech,
Pasadena, USA
- ... Delaney2
- ISO Data Centre, Astrophysics Division of ESA, Villafranca del
Castillo, Spain,4
- ...ênes3
- Institut d' Astrophysique Spatiale, Orsay, France
- ... Okumura4
- ISO Data Centre, Astrophysics Division of ESA, Villafranca del
Castillo, Spain,5
- ... Sauvage5
- CEA, Saclay, Gif-sur-Yvette, France
- ... Guest6
- ISO Data Centre, Astrophysics Division of ESA, Villafranca del
Castillo, Spain,6
- ...
(CIA)13
- CIA is a joint development by the ESA Astrophysics Division
and the ISOCAM Consortium. The ISOCAM Consortium is led by the ISOCAM PI,
C. Cesarsky.
- ...
(ISO)14
- ISO is an ESA project with instruments funded by ESA member
states (especially the PI countries: France, Germany, the Netherlands and the
United Kingdom) and with the participation of ISAS and NASA.
© Copyright 2001 Astronomical Society of the Pacific, 390 Ashton Avenue, San Francisco, California 94112, USA
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