IRAC Instrument Handbook - IRSA - California Institute of Technology

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2.3 Detectors 2.3.1 Design Instrument Description 11 Detectors IRAC Instrument Handbook The IRAC detector arrays were developed by the Raytheon/Santa Barbara Research Center (SBRC) in Goleta, CA, under contract to SAO (Hoffman et al. 1998, [13]; Estrada et al. 1998, [8]). Channels 1 and 2 use InSb arrays operating at ~15 K, and channels 3 and 4 use Si:As detectors operating at ~ 6 K. Both array types use the CRC744 CMOS readout circuit, and the same physical pixel size of 30 µm. The arrays are anti-reflection coated with SiO (Channels 1, 2, and 3) and ZnS (Channel 4). The power dissipation for each array is
Instrument Description 12 Detectors IRAC Instrument Handbook proportional to the exposure time, and the graph would show a straight line. In fact, the arrays were driven past their saturation levels, and the shape of the curve up to 90% of the saturation level was fitted with a polynomial for the linearization module in the pipeline. Table 2.3: IRAC Channel characteristics. Chan Effective λ (µm) Bandwidth (µm) Average transmission (ηI) Minimum in-band transmission Peak transmission 1 3.550 0.750 (21%) 0.676 0.563 0.748 2 4.493 1.015 (23%) 0.731 0.540 0.859 3 5.731 1.425 (25%) 0.589 0.522 0.653 4 7.872 2.905 (36%) 0.556 0.450 0.637
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IRAC Instrument Handbook Figure 4.1
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5 Pipeline Processing 5.1 Level 1 (
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IRAC Instrument Handbook To obtain
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IRAC Instrument Handbook and should
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COMMENT 1 blank line BUNIT = 'MJy/s
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A_1_1 = 2.1886E-05 / distortion coe
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IRAC Instrument Handbook Again, the
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IRAC Instrument Handbook estimate d
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IRAC Instrument Handbook Please not
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7.2.2 Muxbleed (InSb) IRAC Instrume
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7.2.8 Persistent Images IRAC Instru
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7.3 Optical Artifacts 7.3.1 Stray L
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Figure 7.17: Pupil ghost in channel
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IRAC Instrument Handbook The "splot
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8 Introduction to Data Analysis 8.1
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IRAC Instrument Handbook can be mor
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Appendix A. Pipeline History Log S1
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S18.0 Pipeline History Log 140 IRAC
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Pipeline History Log 142 IRAC Instr
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Performing Photometry on IRAC Image
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Performing Photometry on IRAC Image
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C.1 Use of the Five Times Oversampl
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Point Source Fitting IRAC Images wi
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IRAC BCD File Header 168 IRAC Instr
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DN Data Number. FET Field Effect Tr
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WCS World Coordinate System. Acrony
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Collaborators Construction and grou
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Margaret Drennan, Graduate Student
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Darron Harris, Mechanical Technicia
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Dick Bolt, Flight Assurance Jerry B
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Charles Stone, Harness Technician I
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Caltech (California Institute of Te
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List of Figures 190 IRAC Instrument
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Appendix I. Version Log Version 2.0
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Bibliography 198 IRAC Instrument Ha
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channel, 4, 6, 9, 24, 25, 26, 36, 4
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