nidever
August 25, 2015, 6:31pm
#1
We want to put raw DECam data through the stack, but in order to do that we need to add Instrumental Signature Removal (ISR) for DECam. Here are the steps that the NOAO Community Pipeline (CP) performs on the raw data. Single-frame processing is covered in section 4.3.1 (pg. 100-108) of the NOAO Data Handbook . The calibration reference files are covered in section 4.3.3.Description of CP processing by Frank Valdez.Description of DES Y1 data release .
1. Bias Correction: Overscan subtraction and Master Bias image subtraction.2. Cross-talk correction: most noticeable from amplifiers of the same CCD (~0.01%).3. Artifact Masking (saturation, bad pixel masking & interpolation): CRs are detected using “sharp” edges. BPM??4. Nonlinearity correction: The DECam CCDs exhibit nonlinearity at low and high counts, but this varies from chip to chip. A look-up table is used capture the derived corrections.5. Flat-field correction: flat field correction using a Master Dome-flat that has been corrected for large-scale effects (camera reflections and difference in response between domeflat illumination and dark sky) using “star-flats”.6. Fringe correction: The two reddest bands (z and Y) show fringe (interference) patterns. The fringe pattern is temporally stable. A scaled fringe-pattern template is subtracted from the science image.7. Astrometric calibration: Centroids of detected stars in the image are compared to a reference catalog (2MASS) to find corrections for each chip. Higher-order distortion terms (TPV) are kept fixed.8. Photometric calibration: An estimate of the photometric magnitude zero-point is made by comparing the instrumental magnitudes to the calibrated USNO-B1 magnitudes.9. Sky pattern removal: Subtract the pupil ghost/pattern (~10% of photons in dome-flats). Large-scale variations across focal plane are removed and produce a background mean of zero (i.e. sky subtraction).10. Illumination correction: Makes the ensemble response to flux from the night sky uniform across the field of view. Made by combining long exposures (per band) and masking out sources. This dark-sky illumination calibration is divided into each individual exposure.
Dark-correction is also not performed as the dark current is very low.
Brighter-fatter correction is not yet implemented in the CP.
The sky area per pixel changes with radius slightly (~1%). This is correcting in the remapping or warping of images to the tangent plane.
Relevant to @nidever , @hsinfang , @ctslater , @RHL , @yusra , @ktl , gruendl
ktl
August 25, 2015, 6:42pm
#2
Of these, I think we have most in our ISR code except crosstalk correction, illumination correction, and pixel area correction. We used to have a nonlinearity correction, but I don’t see it in the current code. Using different catalogs for astrometric and photometric calibration is I believe not currently supported without messiness (essentially merging the two catalogs); fixing that sounds like it should be a priority.
nidever
August 25, 2015, 8:37pm
#3
Okay, good. I don’t think we need pixel area correction or photometric “calibration” (the CP code just sticks an estimate of the depth in the header). I thought I heard someone say that cross-talk does exist (maybe in the HSC portion).
What does the ISR code live? ip_isr?
RHL
August 25, 2015, 9:03pm
#5
We have cross-talk correction in the HSC ip_isr. There are two codes to calculate the coefficients, one I wrote in python using bleed trails (does DECAM set the A/D below 16-bit saturation), and one that Yagi-san at NAOJ wrote using cosmic rays.
nidever
August 25, 2015, 9:06pm
#6
Okay, great. Can we use those for DECam, or do we need to wait for the HSC-LSST merge to finish?
RHL
August 25, 2015, 9:08pm
#7
I think @price wrote fringe code that we don’t use for HSC. Astro/photo calibration isn’t ISR, but does exist at the per-chip level (and IP2P3 just delivered a prototype multi-CCD astrometric package).
We have no pupil ghost code, but meas_mosaic does the illumination correction – I’d want to do this right rather than just hack things up for DES (although that might be strategic in the short run).
RHL
August 25, 2015, 9:09pm
#8
I suspect that the cross-talk code could be used by cut-and-paste from HSC, but @laurenam and @price would know better.
nidever
August 25, 2015, 9:22pm
#9
That’s what I was thinking (i.e. cut-and-paste).
timj
August 26, 2015, 4:07am
#10
nidever:
(i.e. cut-and-paste).
Surely we mean “cherry-pick”…?
RHL
August 26, 2015, 4:39pm
#11
I’m not sure. This is a part of the ISR and I’m not sure that the way it’s being extended is a cherry pick. I said cut-and-paste on purpose.
Clearly we need to get ISR to the point that this’d be a cherry pick. Maybe it is – I’m not the expert here [either].
RHL
August 26, 2015, 4:41pm
#12
The HSC crosstalk only handles crosstalk within a single chip. That’s good enough for HSC, and I believe LSST [but we’ll see]. I don’t know if it’s enough for DECam, and if it isn’t it makes the design quite different as there’s a sequence point in ISR processing all the chips.
nidever
August 26, 2015, 5:10pm
#13
Ah! Yes, the amplifiers within a CCD have the biggest impact on each other in terms of cross-talk, but I don’t think the other chips can be completely neglected. So how would this work if we wanted to include the cross-talk effects of all chips on each other?
RHL
August 26, 2015, 5:16pm
#14
The snippy answer is fix the electronics. Otherwise it’s a design question for @ktl and @SimonKrughoff
ktl
August 26, 2015, 5:52pm
#15
If you need to process an entire focal plane, we would need a new CmdLineTask driver that does that, invoking ISR subtasks on a per-CCD or per-amplifier basis but combining the results to do crosstalk (and then probably doing more per-CCD tasks thereafter). Parallelization of the subsidiary tasks, if necessary, could be achieved using the (not-yet-existent) Inter-Process Communication Services or the temporarily-ported HSC-developed Task parallelization facility.
nidever
August 26, 2015, 6:05pm
#16
So how do we proceed until that is all developed/worked-out? Assume all amps on other CCDs have a negligible effect?
RHL
August 26, 2015, 6:09pm
#17
I think so. Do you have the cross talk coefficients for every (CCD, Amp) pair? That’d tell us how important this is
nidever
August 26, 2015, 6:14pm
#18
All of the CP calibration products can be grabbed from ftp.http://www.ctio.noao.edu/noao/content/DECam-Calibration-Files ftp://ftp.noao.edu/pub/valdes/DECamCPCalFiles150123/
nidever
August 26, 2015, 6:16pm
#19
Not sure if this is a good idea, but I’m pasting in the full xtalk file:
# victim source x x_err src_nl poly_coeff
ccd25B ccd25A 1.34e-04 1.13e-05 4.078154e+04 1.537540e-04 -6.980507e-08 5.963848e-12
ccd25A ccd25B 3.16e-04 9.32e-06 4.038128e+04 8.826313e-04 -1.619436e-07 9.457412e-12
ccd26A ccd25A 2.95e-05 5.49e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd26A ccd25B 3.90e-05 3.28e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd26B ccd25B 4.10e-05 3.65e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd26B ccd26A -5.36e-04 6.86e-06 4.373232e+04 -6.703301e-04 3.463778e-08 9.838246e-13
ccd26A ccd26B 4.50e-04 7.61e-06 4.076989e+04 8.639303e-04 -1.609836e-07 1.079198e-11
ccd27A ccd26A 2.38e-05 3.12e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd27B ccd26B 2.27e-05 3.88e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd25B ccd27B -1.73e-05 5.30e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd26B ccd27A -2.31e-05 3.77e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd26A ccd27B -2.30e-05 6.04e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd27B ccd27A -7.18e-04 6.54e-06 4.493235e+04 -4.119533e-04 2.331235e-08 8.012798e-13
ccd27A ccd27B 4.47e-04 7.53e-06 4.477443e+04 5.793412e-04 -3.940148e-08 1.767087e-12
ccd32B ccd32A -8.28e-04 7.16e-06 4.235143e+04 -1.642225e-03 2.683240e-07 -1.266185e-11
ccd32A ccd32B 3.40e-04 6.32e-06 4.350554e+04 2.837990e-04 -1.316717e-08 2.130434e-12
ccd33B ccd33A 1.14e-04 5.61e-06 4.328240e+04 7.174996e-05 4.829730e-08 -3.226365e-12
ccd33A ccd33B 3.28e-04 6.41e-06 4.548654e+04 7.434658e-04 -1.614734e-07 1.313377e-11
ccd34A ccd33A 3.61e-05 2.65e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd34B ccd33B 3.05e-05 1.79e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd34B ccd34A -5.23e-04 6.34e-06 4.472627e+04 -6.161739e-04 1.275022e-07 -6.630950e-12
ccd34A ccd34B 1.39e-04 8.52e-06 4.314007e+04 4.483086e-05 -3.110871e-08 4.991906e-12
ccd04B ccd04A -4.76e-04 7.30e-06 4.000246e+04 -7.698136e-04 4.817214e-08 -5.138844e-13
ccd04A ccd04B 1.48e-04 1.18e-05 4.061272e+04 -1.640558e-04 5.410541e-08 -2.150999e-12
ccd04A ccd08A 3.86e-05 3.40e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd04B ccd08B 2.10e-05 3.22e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd08B ccd08A 1.10e-04 5.48e-06 4.061000e+04 2.363033e-04 -5.439024e-08 3.462319e-12
ccd08A ccd08B 2.50e-04 7.03e-06 4.545600e+04 1.506182e-04 -2.772457e-08 3.520614e-12
ccd13B ccd13A -7.52e-04 7.41e-06 4.091800e+04 -9.248876e-04 4.529715e-08 -7.223878e-14
ccd13A ccd13B 3.68e-04 5.28e-06 4.215807e+04 1.284040e-04 1.685578e-09 2.180761e-12
ccd14A ccd13A 3.27e-05 4.21e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd14B ccd13B 3.82e-05 4.35e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd04A ccd14A 3.58e-05 3.56e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd14B ccd14A -6.69e-04 5.79e-06 4.261907e+04 -1.085696e-03 1.151814e-07 -3.468178e-12
ccd14A ccd14B 5.42e-04 8.90e-06 4.119961e+04 4.155819e-04 -2.755728e-08 3.903702e-12
ccd19B ccd19A 1.56e-04 6.10e-06 4.273072e+04 -3.673395e-04 5.520903e-08 -7.037529e-13
ccd19A ccd19B 3.07e-04 7.31e-06 4.557400e+04 -4.371844e-04 1.394320e-07 -4.005219e-12
ccd20A ccd19A 3.63e-05 3.63e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd20A ccd19B 3.60e-05 4.79e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd20B ccd19B 3.98e-05 3.08e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd13A ccd20A 1.65e-05 4.01e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd13B ccd20B 2.68e-05 3.37e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd20B ccd20A -5.55e-04 7.07e-06 4.073200e+04 -1.154366e-03 1.365805e-07 -4.639454e-12
ccd20A ccd20B 4.41e-04 9.19e-06 4.062650e+04 3.416947e-04 -2.926711e-08 3.219866e-12
ccd39B ccd39A 3.41e-04 5.47e-06 4.324480e+04 -7.953314e-05 8.510185e-08 -3.924838e-12
ccd39A ccd39B 6.58e-04 1.10e-05 4.677212e+04 9.891268e-04 -1.287373e-07 1.259077e-11
ccd40A ccd39A 2.98e-05 4.01e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd40A ccd39B 2.03e-05 3.15e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd40B ccd39B 3.67e-05 3.16e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd40B ccd40A -5.70e-04 8.58e-06 4.140226e+04 -7.382333e-04 8.558701e-08 -3.091537e-12
ccd40A ccd40B 4.63e-04 6.32e-06 4.187307e+04 3.896951e-04 3.524695e-08 -2.698712e-12
ccd45A ccd40A 2.53e-05 2.35e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd45B ccd40B 3.46e-05 2.98e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd45B ccd45A -7.12e-04 4.77e-06 4.002995e+04 -1.052282e-03 5.778108e-08 -7.473609e-13
ccd45A ccd45B 4.84e-04 9.84e-06 4.927645e+04 6.848641e-04 -4.371973e-08 -1.367840e-12
ccd46B ccd45B 3.80e-05 2.48e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd39A ccd46A -2.90e-05 5.83e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd46B ccd46A -6.84e-04 4.10e-06 4.604700e+04 1.794597e-04 -6.552887e-07 1.445779e-10
ccd46A ccd46B 4.54e-04 9.50e-06 4.202477e+04 3.081697e-04 -1.486023e-07 2.413996e-11
ccd51B ccd51A 1.12e-04 4.97e-06 4.229637e+04 -7.621760e-05 5.317283e-08 -2.667998e-12
ccd51A ccd51B 3.40e-04 6.99e-06 4.575949e+04 5.373012e-04 -5.345298e-08 5.393547e-12
ccd56A ccd51A 3.45e-05 3.69e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd56B ccd51B 3.42e-05 3.28e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd56B ccd56A -4.88e-04 5.96e-06 4.053117e+04 -5.247658e-04 1.262565e-08 1.284578e-12
ccd56A ccd56B 1.73e-04 7.95e-06 4.484066e+04 3.399175e-04 -7.278292e-08 6.769633e-12
ccd17B ccd17A 1.91e-04 5.81e-06 4.346934e+04 -5.713013e-04 9.681892e-08 -3.194457e-12
ccd17A ccd17B 4.08e-04 9.73e-06 4.369112e+04 4.101070e-04 -1.938186e-09 2.884910e-12
ccd18A ccd17A 3.76e-05 2.56e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd18A ccd17B 9.66e-05 3.86e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd18B ccd18A -6.46e-04 4.85e-06 4.240534e+04 -1.103450e-03 1.659122e-07 -7.609292e-12
ccd18A ccd18B 1.27e-04 9.66e-06 4.516890e+04 3.508282e-04 -2.761238e-08 -2.123464e-12
ccd21B ccd21A 2.78e-04 8.01e-06 4.086850e+04 -3.603690e-04 5.800177e-08 -6.254689e-13
ccd21A ccd21B 3.86e-04 6.76e-06 4.356114e+04 1.019117e-05 4.712910e-08 3.005622e-13
ccd22A ccd21A 4.89e-05 1.75e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd22A ccd21B 1.15e-04 3.11e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd22B ccd21B 5.56e-05 2.22e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd22B ccd22A -4.92e-04 6.69e-06 4.645904e+04 -2.126832e-04 1.419536e-07 -1.051436e-11
ccd22A ccd22B 3.64e-04 7.00e-06 4.078500e+04 3.129247e-04 -2.944141e-08 3.184816e-12
ccd23A ccd22A 4.48e-05 4.16e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd23A ccd22B 7.04e-05 5.23e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd23B ccd22B 3.91e-05 3.39e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd23B ccd23A -9.18e-04 6.02e-06 4.219063e+04 -1.545775e-03 2.520741e-07 -1.278086e-11
ccd23A ccd23B 3.29e-04 9.37e-06 4.295030e+04 6.296770e-04 -8.378071e-08 7.049358e-12
ccd24A ccd23A 2.73e-05 3.77e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd24B ccd23B 7.05e-05 3.33e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd17A ccd24A 7.42e-05 3.42e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd24B ccd24A -6.80e-04 5.49e-06 4.868069e+04 9.344072e-04 -7.201574e-08 -3.782743e-12
ccd24A ccd24B 5.14e-04 8.10e-06 4.159671e+04 5.217194e-04 -2.244689e-08 3.250843e-12
ccd09B ccd09A -8.03e-04 6.09e-06 4.395924e+04 -1.466450e-03 2.551152e-07 -1.175802e-11
ccd09A ccd09B 3.56e-04 5.76e-06 4.422200e+04 1.469622e-04 -6.468155e-09 4.573219e-12
ccd10A ccd09A 4.31e-05 3.80e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd10A ccd09B 9.74e-05 4.63e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd10B ccd09B 4.53e-05 2.85e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd10B ccd10A -6.13e-04 5.22e-06 4.848351e+04 8.567096e-05 1.628971e-07 -2.254366e-11
ccd10A ccd10B 3.81e-04 6.67e-06 4.314500e+04 2.353910e-04 -2.671938e-08 4.970691e-12
ccd12A ccd10B 6.68e-05 2.92e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd11B ccd11A 9.75e-05 8.09e-06 4.230014e+04 -3.903789e-04 4.847455e-08 -5.969791e-13
ccd11A ccd11B 2.34e-04 7.34e-06 4.333001e+04 2.654903e-04 -3.853018e-08 5.984682e-12
ccd12A ccd11A 4.58e-05 2.76e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd12B ccd12A -5.16e-04 4.87e-06 4.062172e+04 -8.936608e-04 6.427286e-08 -7.840033e-13
ccd12A ccd12B 1.69e-04 8.61e-06 4.109660e+04 4.530215e-05 8.853301e-09 7.188464e-13
ccd15B ccd15A 2.26e-04 7.16e-06 4.129917e+04 -5.830054e-04 7.330805e-08 -9.993544e-13
ccd15A ccd15B 3.52e-04 6.02e-06 4.054287e+04 2.880225e-04 -1.733696e-08 2.780847e-12
ccd16A ccd15A 3.32e-05 3.36e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd16A ccd15B 1.19e-04 4.18e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd16B ccd15B 4.33e-05 3.53e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd09A ccd16A 2.07e-05 4.53e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd09B ccd16B 2.43e-05 2.49e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd11A ccd16B 6.38e-05 2.92e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd16B ccd16A -4.93e-04 7.29e-06 4.551762e+04 -4.856586e-04 1.718678e-07 -1.040271e-11
ccd16A ccd16B 4.12e-04 7.28e-06 4.254546e+04 7.454177e-04 -1.052059e-07 8.240842e-12
ccd01B ccd01A -6.47e-04 1.07e-05 4.060288e+04 -1.546081e-03 1.996199e-07 -6.782680e-12
ccd01A ccd01B 4.24e-04 7.68e-06 4.241862e+04 3.468559e-04 -3.372234e-08 4.094861e-12
ccd02A ccd01B 4.80e-05 2.67e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd07A ccd01A 1.61e-05 2.76e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd02B ccd02A 1.21e-04 8.62e-06 4.102851e+04 -1.106290e-04 -9.005856e-09 1.776275e-12
ccd02A ccd02B 3.12e-04 6.29e-06 4.454614e+04 1.110782e-05 5.331542e-08 5.149784e-13
ccd03A ccd02A 3.11e-05 3.43e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd03B ccd02B 6.03e-05 5.99e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd03B ccd03A -6.14e-04 5.53e-06 4.767256e+04 -5.339783e-05 1.963126e-08 -5.269723e-13
ccd03A ccd03B 1.57e-04 6.75e-06 4.108025e+04 4.779748e-05 -2.668258e-09 2.166123e-12
ccd05B ccd05A 2.93e-04 8.38e-06 4.085550e+04 -1.684165e-04 4.644177e-08 -7.459948e-13
ccd05A ccd05B 3.40e-04 4.98e-06 4.310301e+04 5.028621e-04 -6.255596e-08 6.021470e-12
ccd06A ccd05A 8.45e-05 2.99e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd06A ccd05B 1.88e-04 3.05e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd06B ccd05B 8.10e-05 2.89e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd03A ccd06B 7.09e-05 3.37e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd06B ccd06A -4.57e-04 6.25e-06 4.657035e+04 1.600874e-04 7.129154e-08 -5.802876e-12
ccd06A ccd06B 3.82e-04 8.72e-06 4.369817e+04 4.750609e-04 -6.183793e-08 6.949873e-12
ccd07A ccd06A 3.07e-05 2.48e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd07B ccd06B 2.85e-05 2.09e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd01A ccd07A 3.47e-05 5.38e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd01A ccd07B 3.01e-05 2.93e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd01B ccd07B 3.59e-05 3.24e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd07B ccd07A -9.67e-04 4.64e-06 4.172172e+04 -1.661753e-03 2.529592e-07 -1.192235e-11
ccd07A ccd07B 2.82e-04 4.26e-06 4.998422e+04 5.095241e-04 1.665938e-07 -1.822567e-11
ccd28B ccd28A 2.33e-04 5.38e-06 4.425677e+04 4.334732e-05 4.802789e-08 -1.171290e-12
ccd28A ccd28B 4.09e-04 5.41e-06 4.320150e+04 2.619608e-04 -1.421727e-08 3.935424e-12
ccd29A ccd28A 3.67e-05 4.37e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd29A ccd28B 1.21e-04 4.65e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd29B ccd28B 4.17e-05 3.60e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd29B ccd29A -3.78e-04 6.66e-06 4.264790e+04 -3.454996e-04 5.499426e-08 2.427540e-14
ccd29A ccd29B 5.11e-04 9.22e-06 4.458350e+04 2.697242e-04 1.164680e-08 4.739941e-12
ccd30A ccd29A 3.15e-05 5.98e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd30A ccd29B 8.16e-05 6.34e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd30B ccd29B 3.91e-05 4.96e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd29B ccd30A -1.72e-05 2.74e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd30B ccd30A -7.20e-04 6.69e-06 4.376449e+04 -9.961467e-04 2.362914e-07 -1.409822e-11
ccd30A ccd30B 3.16e-04 7.53e-06 4.173988e+04 -1.006230e-04 1.059128e-07 -5.259424e-12
ccd31A ccd30A 5.16e-05 5.99e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd31A ccd30B 1.11e-04 3.48e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd31B ccd30B 3.95e-05 3.21e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd31B ccd31A -6.71e-04 4.77e-06 4.537537e+04 -1.937764e-04 1.419847e-07 -1.082217e-11
ccd31A ccd31B 4.41e-04 6.18e-06 4.478605e+04 5.308792e-04 -1.066669e-08 2.969986e-12
ccd35B ccd35A 2.75e-04 8.23e-06 4.393930e+04 4.850432e-04 -6.022922e-08 6.088015e-12
ccd35A ccd35B 3.16e-04 7.62e-06 4.337013e+04 1.981332e-05 5.139773e-09 3.024289e-12
ccd36A ccd35A 2.43e-05 4.38e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd36B ccd35A 7.63e-05 2.39e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd37B ccd35A -2.72e-05 3.70e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd37A ccd35B -2.60e-05 3.65e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd37B ccd35B -2.35e-05 3.41e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd38B ccd35A -2.64e-05 5.32e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd38B ccd35B -2.65e-05 3.68e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd35A ccd36B 6.69e-05 2.03e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd36B ccd36A -6.90e-04 7.81e-06 4.102332e+04 -1.081565e-03 1.176303e-07 -3.560013e-12
ccd36A ccd36B 5.53e-04 7.71e-06 4.113918e+04 4.471957e-04 -4.599712e-09 1.451657e-12
ccd37B ccd36A 9.84e-05 5.40e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd36A ccd37B -3.68e-05 3.86e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd37B ccd37A -9.65e-04 7.49e-06 4.615280e+04 -5.811671e-04 7.648128e-08 -3.620086e-13
ccd37A ccd37B 4.51e-04 8.99e-06 4.071915e+04 4.251477e-04 -4.808937e-08 5.336902e-12
ccd38A ccd37A 2.06e-05 4.26e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd38B ccd37A 5.53e-05 3.08e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd38B ccd37B 2.49e-05 4.05e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd37A ccd38B -3.15e-05 5.17e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd38B ccd38A -8.39e-04 6.20e-06 4.377215e+04 -5.072515e-04 1.020361e-07 -4.209481e-12
ccd38A ccd38B 4.39e-04 7.82e-06 4.048085e+04 2.821421e-04 1.010263e-09 4.684593e-13
ccd41B ccd41A 1.52e-04 6.84e-06 4.190875e+04 -6.316020e-04 8.345208e-08 -1.478744e-12
ccd41A ccd41B 4.44e-04 1.12e-05 4.588300e+04 1.197172e-04 4.452723e-08 3.903235e-12
ccd42A ccd41A 3.94e-05 3.09e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd42B ccd41A 6.74e-05 2.52e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd42B ccd41B 2.82e-05 4.15e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd42B ccd42A -6.04e-04 7.63e-06 4.525780e+04 -2.582729e-04 1.078027e-07 -5.951368e-12
ccd42A ccd42B 4.83e-04 6.59e-06 4.142327e+04 2.942640e-04 1.524157e-08 6.942588e-13
ccd43A ccd42A 2.68e-05 3.38e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd43B ccd42A 6.06e-05 3.96e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd43B ccd42B 2.53e-05 3.20e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd43B ccd43A -8.87e-04 7.44e-06 4.610202e+04 -6.331891e-06 -1.239009e-08 5.486381e-12
ccd43A ccd43B 3.76e-04 9.57e-06 4.063302e+04 3.006960e-04 -3.723779e-08 4.231105e-12
ccd44A ccd43A 5.43e-05 4.15e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd44B ccd43B 2.61e-05 3.76e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd44B ccd44A -6.56e-04 5.24e-06 4.298461e+04 -1.904655e-03 3.286200e-07 -1.466305e-11
ccd44A ccd44B 4.05e-04 7.19e-06 4.000189e+04 6.220029e-05 4.192673e-08 -7.833339e-13
ccd49B ccd44B 3.92e-05 3.30e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd49B ccd49A 4.90e-05 8.13e-06 4.148704e+04 -4.875290e-04 3.473389e-08 1.678255e-12
ccd49A ccd49B 3.57e-04 6.21e-06 4.228298e+04 3.462096e-04 -7.900761e-08 8.051282e-12
ccd50A ccd49A 2.37e-05 3.73e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd50B ccd50A -6.28e-04 6.68e-06 4.438017e+04 -1.045887e-03 1.533865e-07 -4.883584e-12
ccd50A ccd50B 1.07e-04 5.77e-06 4.117964e+04 -2.088300e-04 2.722838e-09 2.917113e-12
ccd47B ccd47A 9.29e-05 7.59e-06 4.081758e+04 -5.073247e-04 5.997090e-08 -8.734446e-13
ccd47A ccd47B 4.27e-04 7.38e-06 4.195402e+04 7.416249e-04 -1.365435e-07 1.161066e-11
ccd48B ccd47A 8.12e-05 2.20e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd54A ccd47B -3.72e-05 9.87e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd47A ccd48B -2.25e-05 2.75e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd48B ccd48A -6.09e-04 6.37e-06 4.442098e+04 -7.662088e-04 1.561921e-07 -7.359530e-12
ccd48A ccd48B 5.57e-04 9.21e-06 4.192060e+04 3.076270e-04 1.515790e-08 1.770944e-12
ccd52A ccd48A 2.30e-05 2.81e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd52B ccd48B 2.19e-05 2.82e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd54B ccd48A 7.18e-05 2.50e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd52B ccd52A -9.24e-04 7.23e-06 4.184750e+04 -1.354298e-03 1.750528e-07 -6.746239e-12
ccd52A ccd52B 4.78e-04 6.99e-06 4.352608e+04 2.368364e-04 2.420803e-08 2.810762e-12
ccd53A ccd52A 3.63e-05 3.02e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd53B ccd52A 1.37e-04 4.40e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd53B ccd52B 3.88e-05 3.51e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd52A ccd53B -1.98e-05 3.80e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd53B ccd53A -7.89e-04 5.32e-06 4.514412e+04 -1.811504e-04 6.481036e-08 -4.659942e-12
ccd53A ccd53B 4.99e-04 8.99e-06 4.445145e+04 -1.128209e-03 3.922800e-07 -1.895778e-11
ccd55B ccd53A 6.31e-05 3.03e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd54B ccd54A 5.96e-05 6.33e-06 4.034745e+04 -5.017647e-05 -3.638028e-08 3.525615e-12
ccd54A ccd54B 3.82e-04 7.08e-06 4.220941e+04 2.805845e-04 -5.511998e-08 7.743376e-12
ccd55A ccd54A 8.36e-05 4.31e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd55B ccd54B 1.93e-05 8.41e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd55B ccd55A -7.43e-04 5.70e-06 4.246820e+04 -1.446753e-03 2.022911e-07 -8.806607e-12
ccd57B ccd57A 1.16e-04 6.10e-06 4.296856e+04 -4.358962e-04 4.313735e-08 -5.694893e-13
ccd57A ccd57B 4.37e-04 9.55e-06 4.249676e+04 1.761828e-04 2.223526e-08 4.242898e-13
ccd58A ccd57A 5.58e-05 3.80e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd58B ccd57A 1.63e-04 3.04e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd58B ccd57B 4.77e-05 3.35e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd58B ccd58A -6.66e-04 6.20e-06 4.063899e+04 -1.240751e-03 1.375953e-07 -3.231629e-12
ccd58A ccd58B 5.06e-04 7.26e-06 4.102077e+04 5.343781e-04 -4.554472e-08 4.984779e-12
ccd59A ccd58A 2.87e-05 6.46e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd59B ccd58B 3.04e-05 2.93e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd60A ccd58A -2.59e-05 5.79e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd59B ccd59A -9.93e-04 5.50e-06 4.141155e+04 -1.411827e-03 1.352100e-07 -3.835709e-12
ccd59A ccd59B 3.35e-04 7.62e-06 4.397818e+04 1.114668e-04 3.897544e-08 1.247212e-12
ccd60A ccd59A 3.07e-05 3.58e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd60B ccd59B 3.42e-05 4.03e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd61B ccd59A -2.48e-05 1.96e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd58A ccd60A -2.41e-05 3.45e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd60B ccd60A -6.86e-04 5.97e-06 4.081500e+04 -1.286447e-03 8.712351e-08 -1.448095e-12
ccd60A ccd60B 4.48e-04 5.81e-06 4.010889e+04 5.325449e-04 -2.397624e-08 1.186962e-12
ccd59B ccd61A -2.31e-05 9.18e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd61B ccd61A 1.12e-04 8.83e-06 4.195796e+04 -7.125977e-04 1.259627e-07 -4.557482e-12
ccd61A ccd61B 3.33e-04 1.56e-05 4.154934e+04 3.956827e-04 -8.381924e-08 7.662476e-12
ccd62A ccd61A 2.91e-05 9.27e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd62B ccd61A -2.73e-05 1.11e-05 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd62B ccd61B 4.35e-05 1.02e-05 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd61B ccd62B 2.01e-05 1.77e-06 1.000000e+10 0.000000e+00 0.000000e+00 0.000000e+00
ccd62B ccd62A -7.12e-04 4.79e-06 4.795145e+04 -5.917578e-04 1.465943e-07 -8.506643e-12
ccd62A ccd62B 1.04e-04 4.65e-06 4.804204e+04 4.665994e-04 -1.448564e-07 9.934450e-12
RHL
August 26, 2015, 8:58pm
#20
I googled but didn’t find the definitions of the columns. I’m assuming that they are a non-linear fit to the crosstalk, and http://www.ctio.noao.edu/noao/content/decam-known-problems implies that they used to have such an effect. I’m not sure if that was before they started correcting for quadratic non-linearity in the readout electronics