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This manual serves as the reference for both the processing as well as
the correct interpretation of ISOPHOT data as distributed by the ISO
Data Centre. For immediate guidance we present a brief
description of the purpose of the coming chapters:
Chapter 3: Instrument and AOT Overview
This chapter contains a technical description of the ISOPHOT instrument in
the light of data collection. The detector - electronics chain is described
in detail as this determines format of the raw data. Additional sections
describe the features of optical/calibration systems like chopper, internal
reference sources (FCSs), etc.
The second part of this chapter provides an overview of the operational
steps performed by the AOTs during observations.
Chapter 4: Instrumental Characteristics
This chapter describes the known instrumental features and how these can
affect the (raw) data. It is recommended to consider this chapter to become
aware of the possible instrumental effects before an in-depth astronomical
interpretation of the data is carried out.
Chapter 5: Calibration
This chapter gives an overview of the photometric calibration of ISOPHOT.
The standard data-processing performed by the ISO observatory is referred
to as off-line processing (OLP). The OLP data processing is sub-divided into
three processing levels which will be described in detail in the next
3 chapters:
Chapter 6: Data Processing Level: Derive_ERD
The derivation of edited raw data (ERD) is described.
Chapter 7: Data Processing Level: Derive_SPD
The derivation of standard processed data (ERD) is described.
Chapter 8: Data Processing Level: Derive_AAR
The derivation of auto-analysis results (ERD) is described.
Chapter 9: Caveats
This is an important chapter since it describes the the applicability of
the dataproducts and the limits of scientific interpretation. The observer
must have read this chapter before drawing scientific conclusions from the
ISOPHOT data.
Chapter 10: Getting started
Hints of how to become familiar with the data are described in this chapter.
Chapter 11: Guide to data products
This chapter gives an overview of the ISOPHOT data products listed per
processing level or per AOT. For each product references to relevant
sections in this manual are given.
Chapter 12: Product descriptions
The descriptions of the ISOPHOT data products directly related to
an AOT can be found in this chapter.
Chapter 13: Calibration G Products
Detailed descriptions of the ISOPHOT general calibration files (or ``Cal G''
files) can be found in this chapter.
In the appendices the following is presented:
Appendix A: Instrument tables
Descriptions of the filters, apertures, and polarisers are given as well as
their positions on the instrument filterwheels.
Appendix B: Conversion Algorithms for ERD
This appendix gives details on conversion algorithms necessary to
convert telemetry information to parameters with standard physical units
like temperature in K, chopper amplitudes in arcseconds, internal reference
sources' heating powers in mW, etc.
Appendix C: Colour correction
Formulae are presented to derive colour corrections assuming different
(modified) black-body and power-law spectral energy distributions. These
relations are used to construct the colour correction (Cal G) products.
Appendix D: Acronyms
This appendix gives a compulation of acronyms used in this document.
Appendix E: Glossary
This appendix gives a glossary of frequently used terms.
Next: 3 Instrument and AOT
Up: ISOPHOT Data Users Manual
Previous: 1 Preface
ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc