# The following file is from Jim Gunn, from June 2001.  It should be
# self-explanatory; for most purposes, you will want to use the second
# column.  Consider this file preliminary. 
# 
#   These filter curves have been used to calculate the effective
# wavelengths and the qtdl/l (see Chapter 8 of the Black Book) of the
# filters; the values are:
# 
# u 3551 0.0171 
# g 4686 0.0893 
# r 6166 0.0886 
# i 7480 0.0591 
# z 8932 0.0099 
# 
# Table Caption For Response Functions
# 
# The first column is the wavelength in \AAngstroms.  The second column
# (respt) is the quantum efficiency on the sky looking through 1.3
# airmasses at APO for a point source.  The third column (resbig) is the
# QE under these conditions for very large sources (size greater than
# about 80 pixels) for which the infrared scattering is negligible.  The
# only filters for which the infrared scattering has any effect are r and
# i; the scattering in the bluer chips is negligible, and the z chips are
# not thinned and the phenomenon does not exist.  The fourth column
# (resnoa) is the response of the third column with {\it no} atmosphere,
# and the fifth column is the assumed atmospheric transparency at {\it
# one} airmass at APO.  The tables were constructed using monochromator
# illumination of the camera with a bandpass of about 100 \AA, sampled for
# the u filter at 50 \AA intervals and for the others at 100 \AA
# intervals.  These measurements were compared with measured responses of
# the component filters and detectors and three additional points were
# interpolated using these data, two at the extreme toes and one
# additional (in g, r, and i) at the point of the beginning of the sharp
# cutoff of the shortpass interference filter.  These points are necessary
# in order to make spline interpolation of the response data well-behaved.
# These spline-interpolated response data were then multiplied by measured
# aluminum reflectivities and scaled atmospheric transmission to produce
# the tables below. The overall normalization is somewhat uncertain,
# but this uncertainty does not affect the shapes. Note, however, that
# there has been no attempt to remove the finite resolution of the
# monochromator measurements. These tables are the {\it averages} of the
# responses for all six of the camera chips with a given filter. The
# responses are in general very similar except in the z band, where the
# nonuniformity of the infrared rolloff, presumably associated with 
# varying thickness of the epitaxial layer or perhaps the gate structures
# in these thick devices, introduces variations in the effective wavelengths
# of the filters of order 100 \AA. We are currently working on better
# response functions and will present them when they become available, but
# these will suffice for most applications. In all cases the first point
# is a measured point, so the grid of wavelengths at which measurements
# exist is a subset of the wavelength lists here.
# 
#  SDSS Camera z Response Function 141 Points
#
#   lam    respt   resbig   resnoa   xatm

  7730   0.0000   0.0000   0.0000   0.9602
  7755   0.0000   0.0000   0.0000   0.9615
  7780   0.0001   0.0001   0.0001   0.9605
  7805   0.0001   0.0001   0.0001   0.9583
  7830   0.0001   0.0001   0.0001   0.9559
  7855   0.0002   0.0002   0.0002   0.9541
  7880   0.0002   0.0002   0.0002   0.9541
  7905   0.0003   0.0003   0.0003   0.9567
  7930   0.0005   0.0005   0.0005   0.9622
  7955   0.0007   0.0007   0.0007   0.9692
  7980   0.0011   0.0011   0.0011   0.9762
  8005   0.0017   0.0017   0.0017   0.9814
  8030   0.0027   0.0027   0.0027   0.9833
  8055   0.0040   0.0040   0.0040   0.9801
  8080   0.0057   0.0057   0.0058   0.9702
  8105   0.0079   0.0079   0.0082   0.9524
  8130   0.0106   0.0106   0.0114   0.9285
  8155   0.0139   0.0139   0.0155   0.9075
  8180   0.0178   0.0178   0.0202   0.8931
  8205   0.0222   0.0222   0.0255   0.8853
  8230   0.0271   0.0271   0.0311   0.8843
  8255   0.0324   0.0324   0.0369   0.8902
  8280   0.0382   0.0382   0.0428   0.9033
  8305   0.0446   0.0446   0.0484   0.9242
  8330   0.0511   0.0511   0.0536   0.9483
  8355   0.0564   0.0564   0.0583   0.9591
  8380   0.0603   0.0603   0.0625   0.9576
  8405   0.0637   0.0637   0.0661   0.9567
  8430   0.0667   0.0667   0.0693   0.9564
  8455   0.0694   0.0694   0.0720   0.9565
  8480   0.0717   0.0717   0.0744   0.9569
  8505   0.0736   0.0736   0.0763   0.9576
  8530   0.0752   0.0752   0.0779   0.9584
  8555   0.0765   0.0765   0.0792   0.9592
  8580   0.0775   0.0775   0.0801   0.9598
  8605   0.0782   0.0782   0.0808   0.9602
  8630   0.0786   0.0786   0.0812   0.9603
  8655   0.0787   0.0787   0.0813   0.9599
  8680   0.0785   0.0785   0.0812   0.9593
  8705   0.0780   0.0780   0.0807   0.9586
  8730   0.0772   0.0772   0.0801   0.9578
  8755   0.0763   0.0763   0.0791   0.9571
  8780   0.0751   0.0751   0.0779   0.9567
  8805   0.0738   0.0738   0.0766   0.9566
  8830   0.0723   0.0723   0.0750   0.9571
  8855   0.0708   0.0708   0.0734   0.9582
  8880   0.0693   0.0693   0.0716   0.9600
  8905   0.0674   0.0674   0.0698   0.9591
  8930   0.0632   0.0632   0.0679   0.9314
  8955   0.0581   0.0581   0.0661   0.8923
  8980   0.0543   0.0543   0.0642   0.8648
  9005   0.0526   0.0526   0.0624   0.8633
  9030   0.0523   0.0523   0.0607   0.8787
  9055   0.0522   0.0522   0.0590   0.8961
  9080   0.0512   0.0512   0.0574   0.9020
  9105   0.0496   0.0496   0.0559   0.8980
  9130   0.0481   0.0481   0.0546   0.8931
  9155   0.0473   0.0473   0.0535   0.8962
  9180   0.0476   0.0476   0.0524   0.9138
  9205   0.0482   0.0482   0.0515   0.9352
  9230   0.0476   0.0476   0.0505   0.9407
  9255   0.0447   0.0447   0.0496   0.9103
  9280   0.0391   0.0391   0.0485   0.8345
  9305   0.0329   0.0329   0.0474   0.7441
  9330   0.0283   0.0283   0.0462   0.6752
  9355   0.0264   0.0264   0.0450   0.6524
  9380   0.0271   0.0271   0.0438   0.6794
  9405   0.0283   0.0283   0.0426   0.7178
  9430   0.0275   0.0275   0.0415   0.7184
  9455   0.0254   0.0254   0.0404   0.6897
  9480   0.0252   0.0252   0.0393   0.7003
  9505   0.0256   0.0256   0.0383   0.7214
  9530   0.0246   0.0246   0.0373   0.7147
  9555   0.0244   0.0244   0.0363   0.7251
  9580   0.0252   0.0252   0.0353   0.7594
  9605   0.0258   0.0258   0.0342   0.7923
  9630   0.0265   0.0265   0.0331   0.8302
  9655   0.0274   0.0274   0.0319   0.8766
  9680   0.0279   0.0279   0.0307   0.9150
  9705   0.0271   0.0271   0.0294   0.9253
  9730   0.0252   0.0252   0.0280   0.9059
  9755   0.0236   0.0236   0.0267   0.8947
  9780   0.0227   0.0227   0.0253   0.9045
  9805   0.0222   0.0222   0.0240   0.9262
  9830   0.0216   0.0216   0.0227   0.9500
  9855   0.0208   0.0208   0.0213   0.9652
  9880   0.0196   0.0196   0.0201   0.9656
  9905   0.0183   0.0183   0.0188   0.9642
  9930   0.0171   0.0171   0.0176   0.9630
  9955   0.0160   0.0160   0.0165   0.9618
  9980   0.0149   0.0149   0.0153   0.9607
 10005   0.0138   0.0138   0.0143   0.9597
 10030   0.0128   0.0128   0.0132   0.9588
 10055   0.0118   0.0118   0.0122   0.9579
 10080   0.0108   0.0108   0.0112   0.9572
 10105   0.0099   0.0099   0.0103   0.9565
 10130   0.0091   0.0091   0.0094   0.9559
 10155   0.0083   0.0083   0.0086   0.9553
 10180   0.0075   0.0075   0.0078   0.9549
 10205   0.0068   0.0068   0.0071   0.9545
 10230   0.0061   0.0061   0.0064   0.9541
 10255   0.0055   0.0055   0.0058   0.9539
 10280   0.0050   0.0050   0.0052   0.9537
 10305   0.0045   0.0045   0.0047   0.9535
 10330   0.0041   0.0041   0.0042   0.9534
 10355   0.0037   0.0037   0.0038   0.9534
 10380   0.0033   0.0033   0.0035   0.9534
 10405   0.0030   0.0030   0.0031   0.9535
 10430   0.0027   0.0027   0.0028   0.9536
 10455   0.0025   0.0025   0.0026   0.9537
 10480   0.0023   0.0023   0.0024   0.9539
 10505   0.0021   0.0021   0.0022   0.9541
 10530   0.0019   0.0019   0.0020   0.9544
 10555   0.0018   0.0018   0.0019   0.9547
 10580   0.0017   0.0017   0.0018   0.9551
 10605   0.0016   0.0016   0.0016   0.9554
 10630   0.0015   0.0015   0.0015   0.9558
 10655   0.0014   0.0014   0.0014   0.9563
 10680   0.0013   0.0013   0.0013   0.9567
 10705   0.0012   0.0012   0.0012   0.9572
 10730   0.0011   0.0011   0.0011   0.9577
 10755   0.0010   0.0010   0.0010   0.9582
 10780   0.0009   0.0009   0.0009   0.9587
 10805   0.0008   0.0008   0.0008   0.9593
 10830   0.0008   0.0008   0.0008   0.9598
 10855   0.0007   0.0007   0.0007   0.9604
 10880   0.0006   0.0006   0.0007   0.9609
 10905   0.0006   0.0006   0.0006   0.9615
 10930   0.0006   0.0006   0.0006   0.9621
 10955   0.0005   0.0005   0.0005   0.9626
 10980   0.0005   0.0005   0.0005   0.9632
 11005   0.0004   0.0004   0.0004   0.9638
 11030   0.0004   0.0004   0.0004   0.9643
 11055   0.0003   0.0003   0.0003   0.9648
 11080   0.0003   0.0003   0.0003   0.9654
 11105   0.0002   0.0002   0.0002   0.9659
 11130   0.0002   0.0002   0.0002   0.9664
 11155   0.0001   0.0001   0.0001   0.9669
 11180   0.0001   0.0001   0.0001   0.9673
 11205   0.0000   0.0000   0.0000   0.9677
 11230   0.0000   0.0000   0.0000   0.9682
