IRAC Instrument Handbook - IRSA - California Institute of Technology

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IRAC Instrument Handbook CRPIX2 = 128. / Reference pixel along axis 2 CRVAL1 = 346.229408109806 / [deg] RA at CRPIX1,CRPIX2 (using Pointing Recon CRVAL2 = 12.3406747724052 / [deg] DEC at CRPIX1,CRPIX2 (using Pointing Reco CRDER1 = 3.47278123674643E-05 / [deg] Uncertainty in CRVAL1 CRDER2 = 3.44327670377712E-05 / [deg] Uncertainty in CRVAL2 RA_HMS = '23h04m55.1s' / [hh:mm:ss.s] CRVAL1 as sexagesimal DEC_DMS = '+12d20m26s' / [dd:mm:ss] CRVAL2 as sexagesimal RADESYS = 'ICRS ' / International Celestial Reference System EQUINOX = 2000. / Equinox for ICRS celestial coord. system CD1_1 = 0.000165673336023108 / Corrected CD matrix element with Pointing Recon CD1_2 = -0.000296839887227466 / Corrected CD matrix element with Pointing Reco CD2_1 = -0.000296695378233646 / Corrected CD matrix element with Pointing Reco CD2_2 = -0.00016538074830257 / Corrected CD matrix element with Pointing Recon CTYPE1 = 'RA---TAN-SIP' / RA---TAN with distortion in pixel space CTYPE2 = 'DEC--TAN-SIP' / DEC--TAN with distortion in pixel space PXSCAL1 = -1.22334117768332 / [arcsec/pix] Scale for axis 1 at CRPIX1,CRPIX2 PXSCAL2 = 1.22328355209902 / [arcsec/pix] Scale for axis 2 at CRPIX1,CRPIX2 PA = -119.12383984174 / [deg] Position angle of axis 2 (E of N) (was OR UNCRTPA = 0.000467418894131902 / [deg] Uncertainty in position angle CSDRADEC= 1.31286126610331E-06 / [deg] Costandard deviation in RA and Dec SIGRA = 0.0965180263226379 / [arcsec] RMS dispersion of RA over DCE SIGDEC = 0.0477081433171542 / [arcsec] RMS dispersion of DEC over DCE SIGPA = 0.627707783301654 / [arcsec] RMS dispersion of PA over DCE PA = -119.12383984174 / [deg] Position angle of axis 2 (E of N) (was OR RA_RQST = 346.229439557555 / [deg] Requested RA at CRPIX1, CRPIX2 DEC_RQST= 12.3408384725542 / [deg] Requested Dec at CRPIX1, CRPIX2 PM_RA = 0. / [arcsec/yr] Proper Motion in RA (J2000) PM_DEC = 0. / [arcsec/yr] Proper Motion in Dec (J200) RMS_JIT = 0.00561943353954093 / [arcsec] RMS jitter during DCE RMS_JITY= 0.00415225189801845 / [arcsec] RMS jitter during DCE along Y RMS_JITZ= 0.00378640165338011 / [arcsec] RMS jitter during DCE along Z SIG_JTYZ= -0.000574938554882557 / [arcsec] Costadard deviation of jitter in YZ PTGDIFF = 0.599601238096299 / [arcsec] Offset btwn actual and rqsted pntng PTGDIFFX= 0.460985501941048 / [pixels] rqsted - actual pntng along axis 1 PTGDIFFY= -0.383877068036649 / [pixels] rqsted - actual pntng along axis 2 RA_REF = 346.235833333333 / [deg] Commanded RA (J2000) of ref. position DEC_REF = 12.3227777777778 / [deg] Commanded Dec (J2000) of ref. position USEDBPHF= T / T if Boresight Pointing History File was used BPHFNAME= 'SBPHF.0773452800.031.pntg' / Boresight Pointing History Filename FOVVERSN= 'BodyFrames_FTU_14a.xls' / FOV/BodyFrames file version used RECONFOV= 'IRAC_Center_of_3.6umArray' / Reconstructed Field of View ORIG_RA = 346.229614257812 / [deg] Original RA from raw BPHF (without pointi ORIG_DEC= 12.3407106399536 / [deg] Original Dec from raw BPHF (without point ORIGCD11= 0.0001656730165 / [deg/pix] Original CD1_1 element (without point ORIGCD12= -0.0002968400659 / [deg/pix] Original CD1_2 element (without point ORIGCD21= -0.0002966955653 / [deg/pix] Original CD2_1 element (without point ORIGCD22= -0.0001653804356 / [deg/pix] Original CD2_2 element (without point / DISTORTION KEYWORDS A_ORDER = 3 / polynomial order, axis 1, detector to sky A_0_2 = 2.9656E-06 / distortion coefficient A_0_3 = 3.7746E-09 / distortion coefficient Pipeline Processing 87 Level 1 (BCD) Pipeline
A_1_1 = 2.1886E-05 / distortion coefficient A_1_2 = -1.6847E-07 / distortion coefficient A_2_0 = -2.3863E-05 / distortion coefficient A_2_1 = -8.561E-09 / distortion coefficient A_3_0 = -1.4172E-07 / distortion coefficient A_DMAX = 1.394 / [pixel] maximum correction B_ORDER = 3 / polynomial order, axis 2, detector to sky B_0_2 = 2.31E-05 / distortion coefficient B_0_3 = -1.6168E-07 / distortion coefficient B_1_1 = -2.4386E-05 / distortion coefficient B_1_2 = -5.7813E-09 / distortion coefficient B_2_0 = 2.1197E-06 / distortion coefficient B_2_1 = -1.6583E-07 / distortion coefficient B_3_0 = -2.0249E-08 / distortion coefficient B_DMAX = 1.501 / [pixel] maximum correction AP_ORDER= 3 / polynomial order, axis 1, sky to detector AP_0_1 = -6.4275E-07 / distortion coefficient AP_0_2 = -2.9425E-06 / distortion coefficient AP_0_3 = -3.582E-09 / distortion coefficient AP_1_0 = -1.4897E-05 / distortion coefficient AP_1_1 = -2.225E-05 / distortion coefficient AP_1_2 = 1.7195E-07 / distortion coefficient AP_2_0 = 2.4146E-05 / distortion coefficient AP_2_1 = 6.709E-09 / distortion coefficient AP_3_0 = 1.4492E-07 / distortion coefficient BP_ORDER= 3 / polynomial order, axis 2, sky to detector BP_0_1 = -1.6588E-05 / distortion coefficient BP_0_2 = -2.3424E-05 / distortion coefficient BP_0_3 = 1.651E-07 / distortion coefficient BP_1_0 = -2.6783E-06 / distortion coefficient BP_1_1 = 2.4753E-05 / distortion coefficient BP_1_2 = 3.8917E-09 / distortion coefficient BP_2_0 = -2.151E-06 / distortion coefficient BP_2_1 = 1.7E-07 / distortion coefficient BP_3_0 = 2.0482E-08 / distortion coefficient 5.1.21 PREDICTSAT (HDR saturation processing) IRAC Instrument Handbook PREDICTSAT is used to process data taken in the High Dynamic Range (HDR) mode by identifying saturated pixels using the information obtained from the shorter exposure time frames. Specifically, if the shorter frame is frame 1 and the longer frame is frame 2, and they have Fowler numbers F, wait periods W, pixe l values DN, and saturation values of DNsat, then if DN1 ( 2F2 + W2 ) > F + W 1 1 DN sat Pipeline Processing 88 Level 1 (BCD) Pipeline (5.21)
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IRAC Instrument Handbook Spitzer He
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iii IRAC Instrument Handbook 4.8 CA
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v IRAC Instrument Handbook 8.1.4.5
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IRAC Instrument Handbook Astronomic
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2 Instrument Description 2.1 Overvi
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Pickoff Mirror IRAC Instrument Hand
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solving for F, we find ΣI P F = Σ
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IRAC Instrument Handbook Figure 2.5
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Instrument Description 12 Detectors
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Instrument Description 14 Electroni
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IRAC Instrument Handbook into a red
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f ex (throughput correction for bac
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The noise pixels, Npix , are define
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3 Operating Modes IRAC Instrument H
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IRAC Instrument Handbook spacing ha
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Figure 3.1 : IRAC dither patterns f
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Calibration 32 Flat Fields IRAC Ins
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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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IRAC Instrument Handbook - IRSA - California Institute of Technology

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