ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

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260 CHAPTER 20. ADVANCED DATA CALIBRATION • Standard treatment (EXPOSURE pixels are weighted by CCIM.NPIX) to create the top left MOSAIC of Figure 20.6: CIA> raster_scan, raster_pds • Projection using standard variation of each pixel held in CCIM.RMS to create the top right MOSAIC of Figure 20.6: CIA> raster_scan, raster_pds, /weight • Projection using the flat-field error contained in flat-field library to create the lower left MOSAIC of Figure 20.6: CIA> raster_scan, raster_pds, /weight, /wcalg • Projection using the flat-field error computed from the sky-flat (auto-flag) to create the lower right MOSAIC of Figure 20.6: CIA> raster_scan, raster_pds, /weight, /wauto The resulting MOSAICs are shown below. The top left mosaic demonstrates clearly the negative effects of an equal weighting of good and badly flat-fielded pixels. Additionally there is the option wmap, which permits the user to supply his own weight error map. 20.15.3 Coadding images of different astrometry A very useful function of the projection routines are their ability to combine or coadd images that have different astrometry. This can be used to combine raster MOSAICs from different observations of the same object. To take advantage of this functionality we need to go quite low-level and use the C++ executable projection. Here is an example on how to combine raster MOSAICs from different observations of the same object. Note that the same could be done for MOSAICs from different AOTs. For example, a raster MOSAIC and a beam-switch MOSAIC. Also, more than two MOSAICs can be used. • Save both raster MOSAICs as FITS files, giving them each a name with an individual sequence number. We use conv flux to make sure the data are calibrated to the same units. CIA> conv_flux, raster_pds1 CIA> conv_flux, raster_pds2 CIA> raster2fits, raster_pds1, name=’input1’ CIA> raster2fits, raster_pds2, name=’input2’ CIA> $ls input*.fits input1.fits input2.fits
20.15. ADVANCED PROJECTION 261 Figure 20.6: Comparison of standard projection vs. weighted projection Top Left: Library flat-fielding and standard projection Top Right: Libra flat-fielding and projection weighted by variance of each pixel Bottom Left: Libra flat-fielding and projection weighted by library flat-field error Bottom Right: Sky flat-fielding and projection weighted by sky flat-field error
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ISOCAM Interactive Analysis User’
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Michael Rupen (NRAO) Jaqui Sam Lone
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vi CONTENTS 8 Polarization observat
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viii CONTENTS 14.4.6 x3d as a calib
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x CONTENTS 19.3 A beam-switch obser
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xii CONTENTS B CIA command short-li
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xiv CONTENTS
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xvi LIST OF FIGURES 14.13The raster
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xviii LIST OF FIGURES
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xx LIST OF TABLES
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2 CHAPTER 1. ABOUT THE CIA USER’S
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4 CHAPTER 2. ABOUT CIA 2.2 System r
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6 CHAPTER 2. ABOUT CIA Figure 2.2:
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8 CHAPTER 2. ABOUT CIA In addition,
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10 CHAPTER 2. ABOUT CIA 2.3.4 Custo
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12 CHAPTER 2. ABOUT CIA LOG Log fil
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14 CHAPTER 2. ABOUT CIA This will p
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16 CHAPTER 2. ABOUT CIA % device, p
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18 CHAPTER 2. ABOUT CIA
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Introduction The Quick Start Guide
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24 CHAPTER 3. RASTER OBSERVATION (C
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32 CHAPTER 4. STARING OBSERVATION (
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34 CHAPTER 4. STARING OBSERVATION (
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36 CHAPTER 5. SOLAR SYSTEM OBJECT O
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42 CHAPTER 6. BEAM-SWITCH OBSERVATI
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48 CHAPTER 7. CVF OBSERVATION (CAM0
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50 CHAPTER 7. CVF OBSERVATION (CAM0
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52 CHAPTER 8. POLARIZATION OBSERVAT
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Introduction The purpose of Part II
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62 CHAPTER 9. THE DATA PRODUCTS AND
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68 CHAPTER 10. FIRST LOOK AT THE DA
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74 CHAPTER 11. INTRODUCTION TO CIA
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76 CHAPTER 11. INTRODUCTION TO CIA
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78 CHAPTER 12. DATA SLICING 3. At t
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80 CHAPTER 12. DATA SLICING CIA> ns
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82 CHAPTER 12. DATA SLICING equal t
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84 CHAPTER 12. DATA SLICING OR CIA>
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86 CHAPTER 12. DATA SLICING 70 16.0
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88 CHAPTER 12. DATA SLICING • Sel
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90 CHAPTER 12. DATA SLICING We sugg
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92 CHAPTER 12. DATA SLICING title d
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94 CHAPTER 12. DATA SLICING • Sel
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96 CHAPTER 13. DATA CALIBRATION 13.
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98 CHAPTER 13. DATA CALIBRATION •
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100 CHAPTER 13. DATA CALIBRATION 13
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104 CHAPTER 13. DATA CALIBRATION Fi
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106 CHAPTER 13. DATA CALIBRATION au
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108 CHAPTER 13. DATA CALIBRATION 2.
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114 CHAPTER 14. IMAGE ANALYSIS AND
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Introduction The purpose of this pa
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Chapter 15 CIA data structure high-
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15.2. OBSERVATION DATA STRUCTURES 1
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15.3. CALIBRATION DATA STRUCTURE (C
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15.4. AUXILIARY CALIBRATION DATA 17
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15.4. AUXILIARY CALIBRATION DATA 17
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15.5. PREPARED DATA STRUCTURE (PDS)
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Chapter 16 Data structure manipulat
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16.1. CIA DATA STRUCTURE INTERFACE
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16.1. CIA DATA STRUCTURE INTERFACE
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16.2. AN EXAMPLE OF SAD MANIPULATIO
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16.4. MANIPULATING THE MASK 195 and
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16.5. CDS DATA EXTRACTION 197 16.5
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16.6. MANIPULATING CIA DATA STRUCTU
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Chapter 17 Importing ISO data produ
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17.2. IMPORTING FITS TO REGULAR IDL
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Chapter 18 Export of CIA data struc
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18.3. EXPORT FOR ARCHIVING 207 CIA>
Page 229: Part IV Advanced Use of CIA 209
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Page 252 and 253: 232 CHAPTER 20. ADVANCED DATA CALIB
Page 294 and 295: 274 CHAPTER 21. USING SLICE WITHIN
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Page 318 and 319: 298 CHAPTER 23. X CIA REFERENCE GUI
Page 326 and 327: 306 APPENDIX A. GLOSSARY beam-switc
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310 APPENDIX A. GLOSSARY raster dat
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312 APPENDIX A. GLOSSARY
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314 APPENDIX B. CIA COMMAND SHORT-L
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320 APPENDIX C. THE ISO CD-ROM C.2.
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322 APPENDIX C. THE ISO CD-ROM Vari
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324 APPENDIX D. GUIDELINES FOR WRIT
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326 APPENDIX D. GUIDELINES FOR WRIT
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328 APPENDIX E. ISOCAM ASTROMETRY:
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338 APPENDIX F. WHAT IS NEW IN CIA
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344 APPENDIX G. WARNING MESSAGES IN
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346 APPENDIX H. PATCHED ASTROLIB AN
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348 APPENDIX I. UPGRADING OLD CIA S
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350 APPENDIX I. UPGRADING OLD CIA S
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352 APPENDIX J. REPORTING PROBLEMS
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354 APPENDIX K. TECHNICAL REPORTS S
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356 BIBLIOGRAPHY Okumura K., 1998,
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