!Release notes for preliminary quantum detection efficiency curve
!for ACIS front-illuminated detectors.  
!29 August 97 M. Bautz/
!
!Filename: 
!w215c2r_eff_897.qdp
!
!Format: 
!ASCII table suitable for use with qdp. There are two columns:
!1) Energy (keV)
!2) Quantum Efficiency (for ASCA grades 0,2,3,4,6)
!
!Description:
!This file provides a preliminary estimate of the quantum efficiency
!of the ACIS I3 CCD detector (MIT Lincoln Laboratory model ccid17, 
!serial number w215c2r.)  The data are for ASCA grades 0,2,3,4,6, with
!a split-event threshold of 14 electrons (13 adu; adu= analog-to-digital
!converter units) and an event threshold of 40 electrons (38 adu).
!
!These estimates were derived from MIT CSR subassembly calibration measurements,
!and reflect the spatially averaged detection efficiency of the device.
!
!A simple "slab and stop" model of the gate structure (see K. Gendreau,
!MIT PhD. Thesis, 1995) was fit to relative quantum efficiency measurements
!of w215c2r at 4 energies (525 eV, 677 eV, 1740 eV and 2015 eV), 
!using reference detector w190c3 as a quantum efficiency standard.
!The spatially averaged relative efficiencies used in the model
!fit are 1.002, 1.018,1.000,and 0.993 at these four energies; formal statistical
!errors in these relative quantum efficiency measurements are about +-4e-4.
!Systematic errors in these relative measurements are thought to be less 
!than 3%.
!
!The detection efficiency of the reference detector w190c3 was determined from
!fits to white-light data obtained at PTB/BESSY synchrotron storage ring. 
!The assumed model parameters
!for the reference detector were:
!		Assumed Gate Structure Parameters for w190c3 Reference Detector
!	Si	0.260 (micron) (fit)
!	Si02	0.351 (micron) (fit)
!	SiN3	0.026 (micron) (fit)
!	CSSiOx	0.480000 (micron) (fixed)
!	CSWidth	5.20000 (micron)  (fixed)
!	CSSi	1.00000 (micron)  (fixed)
!
!See ACIS Team preliminary calibration report (in preparation) for 
!an explanation of the model parameters and other details.
!The error in the absolute efficiency of the reference detector is believed
!to be less than 5% in the energy range 0.3-4 keV.
!
!The best-fit parameters for w215c2r used to derive this quantum efficiency
!curve are: 
!	Si	0.266 (micron)	fit
!	Si02	0.339 (micron)	fit
!    	Si3N4	0.0200 (micron)	(fixed)
!    	CSSiOx	0.480000 (micron) (fixed)
!  	CSWidth 5.20000 (micron) (fixed)
!    	CSSi  	1.00000 (micron) (fixed)
!
!The depletion depth, which determines the response at higher energies,
!was constrained using the 5.9 keV branching ratio method of Prigozhin;
!see the ACIS Team preliminary calibration report (in prepartion) for details.
!The best fit depletion depth is 65 +-2 microns.  This estimate agrees, within
!5%, with measurements made relative to the solid state beam normalization
!detector at the MSFC X-ray Calibration Facility during ACIS flat-field testing.
!
!Intended use:
!When combined with ancillary response functions (arf) representing the HRMA
!effective area and  ACIS optical blocking filter transmission as functions of 
!energy,and the normalized response function matrix previously
!release w215c2r_norm.rmf (see http://www.acis.mit.edu), this quantum efficiency
!curve may be used for estimating  counting rates and simulating
!spectra obtained from  proposed ACIS/AXAF observations. 
!
!Notes/Bugs: 
!1. Errors in this
!efficiency curve are believed to be no greater than 10%, except at energies
!in the immediate vicinity (within 20 eV) of characteristic absorption edges
!of N, O and Si, where near edge structure (which has been measured but not
!included in this prediction) is known to cause quantum efficiency variations
!of order 20-30%.  XAFS will be included in subsequent releases of ACIS
!quantum efficiency curves.
!
!2. This quantum efficiency relation  is  expected to be fairly representative 
!of all ACIS FI detectors. Spatial variations in quantum efficiency within
!one ACIS FI detector are generally less than 5% when averaged on 32x32 pixel 
!scales.  Detector to detector variations among ACIS FI devices can be as 
!large as 15%.
!
!3. The gate structure models assumed here (slab and stop) are too simple and
!will be elaborated in subsequent releases.
!
!4. Pileup corrections have not been included in relative quantum efficiency
!measurements; these are known to be small (<1%).  Pileup corrections in the 
!absolute measurement of the reference detector efficiency are not based on 
!the Jones model. 
!
!6. This data in this file (w215c2r_eff_897.qdp) are replica of
!/suiko/d3/ti/Response/w215c2r/w215c2r.qdp of April 17 1997 14:58.
!Energy(keV),QE
0.050000 0.000000
0.060000 0.000000
0.070000 0.000000
0.080000 0.000000
0.090000 0.000000
0.100000 0.000000
0.110000 0.000000
0.120000 0.000000
0.130000 0.000000
0.140000 0.000000
0.150000 0.000000
0.160000 0.000002
0.170000 0.000010
0.180000 0.000034
0.190000 0.000096
0.200000 0.000237
0.210000 0.000517
0.220000 0.001018
0.230000 0.001842
0.240000 0.003105
0.250000 0.004928
0.260000 0.007426
0.270000 0.010703
0.280000 0.014845
0.290000 0.019914
0.300000 0.025946
0.310000 0.032954
0.320000 0.040925
0.330000 0.049827
0.340000 0.059611
0.350000 0.070214
0.360000 0.081563
0.370000 0.093581
0.380000 0.106186
0.390000 0.119298
0.400000 0.116214
0.410000 0.129419
0.420000 0.142989
0.430000 0.156856
0.440000 0.170958
0.450000 0.185239
0.460000 0.199646
0.470000 0.214131
0.480000 0.228654
0.490000 0.243177
0.500000 0.257667
0.510000 0.272094
0.520000 0.286433
0.530000 0.300663
0.540000 0.131525
0.550000 0.142514
0.560000 0.153731
0.570000 0.165146
0.580000 0.176727
0.590000 0.188448
0.600000 0.200282
0.610000 0.212204
0.620000 0.224190
0.630000 0.236220
0.640000 0.248272
0.650000 0.260328
0.660000 0.272371
0.670000 0.284385
0.680000 0.296355
0.690000 0.308267
0.700000 0.320110
0.710000 0.331872
0.720000 0.343542
0.730000 0.355112
0.740000 0.366573
0.750000 0.377916
0.760000 0.389136
0.770000 0.400225
0.780000 0.411180
0.790000 0.421993
0.800000 0.432663
0.810000 0.443183
0.820000 0.453552
0.830000 0.463767
0.839999 0.473825
0.849999 0.483725
0.859999 0.493465
0.869999 0.503045
0.879999 0.512463
0.889999 0.521719
0.899999 0.530813
0.909999 0.539745
0.919999 0.548515
0.929999 0.557124
0.939999 0.565574
0.949999 0.573864
0.959999 0.581997
0.969999 0.589973
0.979999 0.597794
0.989999 0.605462
0.999999 0.612978
1.009999 0.620344
1.019999 0.627562
1.029999 0.634635
1.039999 0.641563
1.049999 0.648350
1.059999 0.654997
1.069999 0.661508
1.079999 0.667883
1.089999 0.674125
1.099999 0.680237
1.109999 0.686221
1.119999 0.692079
1.129999 0.697814
1.139999 0.703427
1.149999 0.708922
1.159999 0.714300
1.169999 0.719564
1.179999 0.724716
1.189999 0.729759
1.199999 0.734694
1.209999 0.739524
1.219999 0.744251
1.229999 0.748878
1.239999 0.753405
1.249999 0.757837
1.259999 0.762173
1.269999 0.766418
1.279999 0.770572
1.289999 0.774637
1.299999 0.778616
1.309999 0.782510
1.319999 0.786321
1.329999 0.790051
1.339999 0.793702
1.349999 0.797275
1.359999 0.800772
1.369999 0.804195
1.379999 0.807544
1.389999 0.810823
1.399999 0.814031
1.409999 0.817170
1.419999 0.820242
1.429999 0.823247
1.439999 0.826188
1.449999 0.829065
1.459999 0.831879
1.469999 0.834631
1.479999 0.837322
1.489999 0.839953
1.499999 0.842525
1.509999 0.845039
1.519999 0.847494
1.529999 0.849893
1.539999 0.852235
1.549999 0.854521
1.559999 0.856751
1.569999 0.858926
1.579999 0.861046
1.589999 0.863112
1.599999 0.865123
1.609999 0.867079
1.619999 0.868982
1.629999 0.870831
1.639999 0.872625
1.649999 0.874366
1.659999 0.876052
1.669999 0.877685
1.679999 0.879263
1.689999 0.880787
1.699999 0.882256
1.709999 0.883671
1.719999 0.885031
1.729999 0.886335
1.739999 0.887584
1.749999 0.888777
1.759999 0.889914
1.769999 0.890995
1.779999 0.892020
1.789999 0.892987
1.799999 0.893898
1.809999 0.894750
1.819999 0.895545
1.829999 0.896283
1.839999 0.896961
1.849999 0.583678
1.859999 0.587522
1.869999 0.591331
1.879999 0.595103
1.889999 0.598840
1.899999 0.602542
1.909999 0.606209
1.919999 0.609841
1.929999 0.613438
1.939999 0.617000
1.949998 0.620528
1.959998 0.624023
1.969998 0.627484
1.979998 0.630911
1.989998 0.634305
1.999998 0.637665
2.009999 0.640994
2.019999 0.644289
2.029999 0.647552
2.039999 0.650783
2.049999 0.653982
2.059999 0.657149
2.069999 0.660285
2.079998 0.663389
2.089998 0.666463
2.099998 0.669506
2.109998 0.672519
2.119998 0.675502
2.129998 0.678455
2.139998 0.681378
2.149998 0.684272
2.159998 0.687137
2.169998 0.689973
2.179998 0.692780
2.189998 0.695559
2.199998 0.698310
2.209998 0.701033
2.219998 0.703728
2.229998 0.706397
2.239998 0.709037
2.249998 0.711652
2.259998 0.714239
2.269998 0.716800
2.279998 0.719336
2.289998 0.721845
2.299998 0.724329
2.309998 0.726787
2.319998 0.729220
2.329998 0.731629
2.339998 0.734013
2.349998 0.736372
2.359998 0.738707
2.369998 0.741019
2.379998 0.743307
2.389998 0.745571
2.399998 0.747812
2.409998 0.750031
2.419998 0.752226
2.429998 0.754399
2.439998 0.756550
2.449998 0.758679
2.459998 0.760786
2.469998 0.762871
2.479998 0.764936
2.489998 0.766979
2.499998 0.769001
2.509998 0.771002
2.519998 0.772983
2.529998 0.774944
2.539998 0.776885
2.549998 0.778805
2.559998 0.780707
2.569998 0.782589
2.579998 0.784451
2.589998 0.786295
2.599998 0.788120
2.609998 0.789926
2.619998 0.791714
2.629998 0.793484
2.639998 0.795235
2.649998 0.796969
2.659998 0.798685
2.669998 0.800384
2.679998 0.802066
2.689998 0.803731
2.699998 0.805378
2.709998 0.807009
2.719998 0.808624
2.729998 0.810222
2.739998 0.811804
2.749998 0.813370
2.759998 0.814921
2.769998 0.816455
2.779998 0.817975
2.789998 0.819479
2.799998 0.820968
2.809998 0.822442
2.819998 0.823901
2.829998 0.825346
2.839998 0.826776
2.849998 0.828192
2.859998 0.829593
2.869998 0.830981
2.879998 0.832355
2.889998 0.833715
2.899998 0.835062
2.909998 0.836395
2.919998 0.837715
2.929998 0.839023
2.939998 0.840317
2.949998 0.841598
2.959998 0.842867
2.969998 0.844123
2.979998 0.845367
2.989998 0.846598
2.999998 0.847818
3.009998 0.849025
3.019998 0.850221
3.029998 0.851404
3.039998 0.852577
3.049998 0.853738
3.059998 0.854887
3.069998 0.856026
3.079998 0.857153
3.089998 0.858269
3.099998 0.859374
3.109998 0.860469
3.119998 0.861553
3.129997 0.862627
3.139997 0.863690
3.149997 0.864743
3.159997 0.865786
3.169997 0.866818
3.179997 0.867841
3.189997 0.868854
3.199997 0.869858
3.209997 0.870851
3.219997 0.871835
3.229997 0.872810
3.239997 0.873775
3.249997 0.874732
3.259997 0.875678
3.269997 0.876617
3.279997 0.877546
3.289997 0.878466
3.299997 0.879377
3.309997 0.880280
3.319997 0.881174
3.329997 0.882060
3.339997 0.882937
3.349997 0.883806
3.359997 0.884667
3.369997 0.885519
3.379997 0.886364
3.389997 0.887200
3.399997 0.888029
3.409997 0.888849
3.419997 0.889662
3.429997 0.890467
3.439997 0.891265
3.449997 0.892055
3.459997 0.892837
3.469997 0.893612
3.479997 0.894380
3.489997 0.895140
3.499997 0.895893
3.509997 0.896639
3.519997 0.897378
3.529997 0.898110
3.539997 0.898834
3.549997 0.899552
3.559997 0.900263
3.569997 0.900967
3.579997 0.901664
3.589997 0.902354
3.599997 0.903038
3.609997 0.903715
3.619997 0.904385
3.629997 0.905049
3.639997 0.905706
3.649997 0.906357
3.659997 0.907001
3.669997 0.907639
3.679997 0.908270
3.689997 0.908895
3.699997 0.909514
3.709997 0.910126
3.719997 0.910732
3.729997 0.911332
3.739997 0.911926
3.749997 0.912513
3.759997 0.913094
3.769997 0.913669
3.779997 0.914238
3.789997 0.914801
3.799997 0.915358
3.809997 0.915909
3.819997 0.916453
3.829997 0.916992
3.839997 0.917524
3.849997 0.918050
3.859997 0.918571
3.869997 0.919085
3.879997 0.919593
3.889997 0.920095
3.899997 0.920592
3.909997 0.921082
3.919997 0.921566
3.929997 0.922044
3.939997 0.922516
3.949997 0.922982
3.959997 0.923442
3.969997 0.923896
3.979997 0.924344
3.989997 0.924786
3.999997 0.925222
4.009997 0.925652
4.019997 0.926075
4.029997 0.926493
4.039998 0.926904
4.049998 0.927309
4.059998 0.927708
4.069998 0.928101
4.079998 0.928488
4.089999 0.928868
4.099999 0.929243
4.109999 0.929610
4.119999 0.929972
4.130000 0.930328
4.140000 0.930677
4.150000 0.931019
4.160000 0.931355
4.170001 0.931685
4.180001 0.932009
4.190001 0.932326
4.200001 0.932636
4.210001 0.932940
4.220002 0.933237
4.230002 0.933528
4.240002 0.933812
4.250002 0.934090
4.260003 0.934361
4.270003 0.934625
4.280003 0.934882
4.290003 0.935132
4.300004 0.935376
4.310004 0.935613
4.320004 0.935843
4.330004 0.936066
4.340004 0.936282
4.350005 0.936491
4.360005 0.936693
4.370005 0.936888
4.380005 0.937076
4.390006 0.937257
4.400006 0.937430
4.410006 0.937597
4.420006 0.937756
4.430007 0.937907
4.440007 0.938052
4.450007 0.938189
4.460007 0.938319
4.470007 0.938441
4.480008 0.938556
4.490008 0.938663
4.500008 0.938763
4.510008 0.938855
4.520009 0.938939
4.530009 0.939016
4.540009 0.939085
4.550009 0.939147
4.560009 0.939201
4.570010 0.939247
4.580010 0.939285
4.590010 0.939315
4.600010 0.939337
4.610011 0.939352
4.620011 0.939358
4.630011 0.939357
4.640011 0.939347
4.650012 0.939330
4.660012 0.939304
4.670012 0.939270
4.680012 0.939228
4.690012 0.939178
4.700013 0.939120
4.710013 0.939054
4.720013 0.938979
4.730013 0.938896
4.740014 0.938805
4.750014 0.938705
4.760014 0.938597
4.770014 0.938481
4.780015 0.938356
4.790015 0.938223
4.800015 0.938082
4.810015 0.937932
4.820015 0.937773
4.830016 0.937606
4.840016 0.937431
4.850016 0.937247
4.860016 0.937055
4.870017 0.936854
4.880017 0.936644
4.890017 0.936426
4.900017 0.936199
4.910017 0.935964
4.920018 0.935720
4.930018 0.935467
4.940018 0.935206
4.950018 0.934936
4.960019 0.934657
4.970019 0.934370
4.980019 0.934074
4.990019 0.933770
5.000020 0.933456
5.010020 0.933134
5.020020 0.932804
5.030020 0.932465
5.040020 0.932117
5.050021 0.931760
5.060021 0.931395
5.070021 0.931021
5.080021 0.930638
5.090022 0.930247
5.100022 0.929847
5.110022 0.929438
5.120022 0.929021
5.130023 0.928595
5.140023 0.928160
5.150023 0.927717
5.160023 0.927265
5.170023 0.926804
5.180024 0.926335
5.190024 0.925857
5.200024 0.925371
5.210024 0.924876
5.220025 0.924373
5.230025 0.923861
5.240025 0.923340
5.250025 0.922812
5.260026 0.922274
5.270026 0.921728
5.280026 0.921174
5.290026 0.920611
5.300026 0.920040
5.310027 0.919460
5.320027 0.918872
5.330027 0.918276
5.340027 0.917672
5.350028 0.917059
5.360028 0.916438
5.370028 0.915808
5.380028 0.915171
5.390028 0.914525
5.400029 0.913871
5.410029 0.913209
5.420029 0.912539
5.430029 0.911861
5.440030 0.911175
5.450030 0.910481
5.460030 0.909779
5.470030 0.909069
5.480031 0.908351
5.490031 0.907625
5.500031 0.906891
5.510031 0.906150
5.520031 0.905401
5.530032 0.904644
5.540032 0.903879
5.550032 0.903107
5.560032 0.902327
5.570033 0.901540
5.580033 0.900745
5.590033 0.899943
5.600033 0.899133
5.610034 0.898315
5.620034 0.897491
5.630034 0.896659
5.640034 0.895820
5.650034 0.894973
5.660035 0.894119
5.670035 0.893259
5.680035 0.892391
5.690035 0.891516
5.700036 0.890634
5.710036 0.889745
5.720036 0.888849
5.730036 0.887946
5.740036 0.887036
5.750037 0.886120
5.760037 0.885197
5.770037 0.884267
5.780037 0.883330
5.790038 0.882387
5.800038 0.881437
5.810038 0.880481
5.820038 0.879519
5.830039 0.878550
5.840039 0.877574
5.850039 0.876593
5.860039 0.875605
5.870039 0.874610
5.880040 0.873610
5.890040 0.872604
5.900040 0.871591
5.910040 0.870573
5.920041 0.869548
5.930041 0.868518
5.940041 0.867482
5.950041 0.866440
5.960042 0.865392
5.970042 0.864339
5.980042 0.863280
5.990042 0.862215
6.000042 0.861145
6.010043 0.860069
6.020043 0.858988
6.030043 0.857901
6.040043 0.856809
6.050044 0.855712
6.060044 0.854610
6.070044 0.853502
6.080044 0.852390
6.090044 0.851272
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