The FUSE Archival Data Handbook - MAST - STScI

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Contents 1 Introduction 1 2 The Instrument 3 2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Optical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2.1 Focal Plane Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2.2 Spectrograph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2.3 Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2.4 Fine Error Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 Instrument Alignment and Target Centering . . . . . . . . . . . . . . . . . . . . 8 2.3.1 Mirror Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.2 Grating Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.3 Pointing Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4 Instrument Data System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.5 Science Data Collection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.5.1 TTAG (Photon Address) mode . . . . . . . . . . . . . . . . . . . . . . . 11 2.5.2 HIST (Spectral Image) mode . . . . . . . . . . . . . . . . . . . . . . . . 11 2.6 FUSE Mission Short Biography . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3 Pipeline Processing 14 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2 OPUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.3 Overview of CalFUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4 The Science Data Files 16 4.1 Introduction to the Science Data Files . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.2 File Name Conventions and Useful Program IDs . . . . . . . . . . . . . . 20 4.1.3 Notation Convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.2 Contents of the Science Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.2.1 Exposure-level Files (*fraw.fit,*fcal.fit,*fidf.fit, *ext.gif,*rat.gif) 23 4.2.2 Observation-level Data Files (*all*.fit, *ano*.fit, *nvo*.fit) . . . 35 ii
5 Ancillary Files 42 5.1 FES Image Files (*fesfraw.fit, *fesfcal.fit) . . . . . . . . . . . . . . . . . 42 5.2 Time-Resolved Engineering Files (*jitrf.fit,hskpf.fit) . . . . . . . . . . . . 44 5.3 Engineering Snapshot Files (*snapf.fit, *snpaf.fit, *snpbf.fit) . . . . . . . 47 5.4 Association Tables (*asnf.fit) . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.5 Mission Planning Schedule (MPS) Files (mps*.pdf) . . . . . . . . . . . . . . . . 49 5.6 Mission Planning Guide Star Plots . . . . . . . . . . . . . . . . . . . . . . . . . 52 5.7 Daily Count Rate Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 5.8 Science Data Assessment Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 6 FITS File Headers 59 6.1 Science Data File Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2 Engineering Data File Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 7 Factors Affecting FUSE Data Quality 72 7.1 Emission Lines Contributing to the Background . . . . . . . . . . . . . . . . . . 72 7.1.1 Airglow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 7.1.2 Second Order Solar light . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 7.1.3 Scattered Solar Light in SiC Channels . . . . . . . . . . . . . . . . . . . 74 7.1.4 Identifying Airglow and Solar Emission . . . . . . . . . . . . . . . . . . . 74 7.2 Additional Contributions to the Background . . . . . . . . . . . . . . . . . . . . 75 7.2.1 Stray and Scattered Light . . . . . . . . . . . . . . . . . . . . . . . . . . 75 7.2.2 Event Bursts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.3 Detector Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 7.3.1 Moiré Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 7.3.2 Grid Wires and the Worm . . . . . . . . . . . . . . . . . . . . . . . . . . 79 7.3.3 Dead Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 7.3.4 Gain Sag and Detector Walk . . . . . . . . . . . . . . . . . . . . . . . . 81 7.3.5 Fixed-pattern Noise and FP splits . . . . . . . . . . . . . . . . . . . . . . 84 7.4 Instrumental Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 7.4.1 Spectral Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 7.4.2 Astigmatism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 7.5 Flux Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 7.5.1 Definition and Internal Consistency . . . . . . . . . . . . . . . . . . . . . 86 7.5.2 Quasi-molecular Satellite Features . . . . . . . . . . . . . . . . . . . . . . 91 7.5.3 G 191-B2B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 7.5.4 Time Dependence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 7.5.5 MDRS and HIRS Calibration . . . . . . . . . . . . . . . . . . . . . . . . 98 7.5.6 High-Order Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 7.6 Residual Wavelength Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 7.7 FUSE Resolving Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 7.8 Background Subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 7.9 Detector Grid Voltage Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 iii
Page 1: The FUSE Archival Data Handbook Jun
Page 5 and 6: List of Tables 1.1 FUSE Data Inform
Page 7 and 8: List of Figures 2.1 Optical layout
Page 9 and 10: Chapter 1 Introduction The Far Ultr
Page 11 and 12: Chapter 2 The Instrument 2.1 Introd
Page 13 and 14: Y Coordinate (arcsec) -150 -100 -50
Page 15 and 16: 2.2.3 Detectors Table 2.2: Waveleng
Page 17 and 18: apertures simultaneously for best r
Page 19 and 20: sent to the spacecraft Attitude Con
Page 21 and 22: NOTES to table: (1) Data taken prio
Page 23 and 24: 3.3 Overview of CalFUSE The CalFUSE
Page 25 and 26: Figure 4.1: A geometrically correct
Page 27 and 28: 19 Table 4.1: FUSE Data File Types
Page 29 and 30: Table 4.2: Science Programs Code Ca
Page 31 and 32: also be placed at the reference poi
Page 33 and 34: 4.2.1.2 Extracted Spectral Files (*
Page 35 and 36: Table 4.9: Format of Intermediate D
Page 37 and 38: Table 4.10: IDF Channel Array Apert
Page 39 and 40: *ext.gif: These files show a calibr
Page 41 and 42: 4.2.1.5 Trailer Files (*.trl) The t
Page 43 and 44: Note that verbose level N includes
Page 45 and 46: 4.2.2.2 Preview Files (*00000*.gif,
Page 47 and 48: Figure 4.8: Example of a combined,
Page 49 and 50: Table 4.15: Format of NVO Spectral
Page 51 and 52: images have observation IDs and exp
Page 53 and 54:
Earth’s magnetic field, which was
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engineering data used by CalFUSE to
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5.5 Mission Planning Schedule (MPS)
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1 - FUV (Far UltraViolet) Peak-up 2
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the positions of the apertures. The
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The example in Fig. 5.7 shows the s
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7-Nov-2008 14:42 Seconds since Thur
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Chapter 6 FITS File Headers 6.1 Sci
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SUMMARY EXPOSURE INFORMATION DATEOB
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DET2HVBL= 101 / Det2 MCP B HV bias
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CHID_CAL= ’chid1b014.fit ’ / Wi
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BKG_MAX3= 0 / [pixels] bkgd sample
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ASSOCIATION KEYWORDS ASN_ID = ’A1
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NOGDEINF is the fraction of EXP DUR
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Figure 7.1: The difference in the d
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7.2 Additional Contributions to the
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Table 7.3: Ratio of Grating-Scatter
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7.3.2 Grid Wires and the Worm Two g
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7.3.4 Gain Sag and Detector Walk Th
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Figure 7.7: The effect of gain sag
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7.4 Instrumental Effects 7.4.1 Spec
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Table 7.5: FUSE Calibration Star Pa
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Figure 7.11: Same as Figure 7.10 ab
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Figure 7.13: A zoomed-view of the s
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Figure 7.16: A zoomed view of a sma
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Because the worm in LiF1B LWRS is b
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Figure 7.21: Same as Fig. 7.19 abov
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Figure 7.24: Same as Figure 7.10 ab
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Figure 7.26: Residual wavelength er
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(for possible solutions see Dixon e
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8.2.1 IDL Analysis Packages Conside
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[H2ools] is a package of IDL routin
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of synthetic interstellar spectra.
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Chapter 9 Special Cases and Frequen
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TTAG exposures of moderately-bright
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Bibliography Abgrall, H., Roueff, E
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Shchigolev, B.M. 1965, Mathematical
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Name Definition SiC1A The A segment
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The photon events with pulse height
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Appendix C Trailer File Warning Mes
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LIF CNT RATE out of bounds. Setting
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Table D.1: Formats of Housekeeping
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Appendix E Format of Engineering Sn
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Table E.3: Table E.1 (continued) a
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Figure F.1: Residual wavelength err
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Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151:
Figure F.11: Residual wavelength er
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The FUSE Archival Data Handbook - MAST - STScI

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