# Units: # "lambda" is in Angstroms # "pass" is the contribution to the detector signal per photon # entering the atmosphere of Earth (for airmass 1.3) # "pass_1_[069]" are the contribution to the signal for airmasses # 1.0, 1.6, and 1.9 respectively # # Bandpass Name(s): r # # Instrument: SDSS telescope at APO Column 1 # # Determined by: Jim Gunn, Mamoru Doi, Daniel Eisenstein # # Date of determination: 2001-12-18 # # Meaning of/Reason for default column: 1.3 airmass; SDSS magnitudes are # calibrated to this airmass # # Notes: # # Keep in mind that SDSS pipelines are output in the MAYBE magnitude # system, which is currently (2002-08-19) thought to be related to # the AB magnitude system by the offsets: # # u(AB,2.5m) = u(MAYBE,2.5m) - 0.042 # g(AB,2.5m) = g(MAYBE,2.5m) + 0.036 # r(AB,2.5m) = r(MAYBE,2.5m) + 0.015 # i(AB,2.5m) = i(MAYBE,2.5m) + 0.013 # z(AB,2.5m) = z(MAYBE,2.5m) - 0.002 # # See sdss-general/2486 or contact David W. Hogg for details. # # The following notes come from Jim Gunn: # # These files are the response functions as measured by Mamoru Jan 2001, # interpolated to fill in the sharp corner near the red cutoff using model # filters and then splined to a standard wavelengh set, shared by all of # the files in this set of response functions for all the telescopes. # # The files indexed 0 are the response functions averaged over the six # columns of the camera. # # The file sdssav.lis is a list of magnitudes (V=0) and colors for these # (average) response functions at 1.3 airmasses run against the # Gunn-Stryker spectrophotometric atlas stars and the AB95 standards. # These are AB magnitudes, note, not whatever system we will come up with. # To transform from USNO magnitudes to a natural SDSS AB system, the # best-guess transformations as of this writing are # # u_AB = u' - 0.04 - 0.003*(u'-g') # # g_AB = g' + 0.069*(g'-r') # # r_AB = r' + 0.038*(r'-i') # # i_AB = i' + 0.049*(r'-i') # # z_AB = z' - 0.01 + 0.011*(i'-z') # # but these are based ENTIRELY on calculations, and should be much better # determined by observations shortly. # # jeg011218 # typedef struct { double lambda; double vacuum_pass; double pass_1_0; double pass; double pass_1_6; double pass_1_9; } KFILTER_SDSS; KFILTER_SDSS 5230 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 5280 0.0021 0.0014 0.0014 0.0013 0.0013 KFILTER_SDSS 5330 0.0013 0.0009 0.0009 0.0008 0.0008 KFILTER_SDSS 5380 -0.0027 -0.0019 -0.0018 -0.0018 -0.0017 KFILTER_SDSS 5430 0.0110 0.0076 0.0073 0.0071 0.0068 KFILTER_SDSS 5480 0.0649 0.0446 0.0431 0.0416 0.0402 KFILTER_SDSS 5530 0.1649 0.1135 0.1096 0.1058 0.1022 KFILTER_SDSS 5580 0.3044 0.2095 0.2023 0.1955 0.1888 KFILTER_SDSS 5630 0.4426 0.3047 0.2944 0.2844 0.2748 KFILTER_SDSS 5680 0.5407 0.3723 0.3598 0.3477 0.3360 KFILTER_SDSS 5730 0.6018 0.4147 0.4009 0.3875 0.3746 KFILTER_SDSS 5780 0.6385 0.4405 0.4259 0.4119 0.3983 KFILTER_SDSS 5830 0.6596 0.4557 0.4410 0.4267 0.4129 KFILTER_SDSS 5880 0.6723 0.4656 0.4508 0.4366 0.4228 KFILTER_SDSS 5930 0.6811 0.4731 0.4586 0.4446 0.4310 KFILTER_SDSS 5980 0.6888 0.4802 0.4661 0.4525 0.4393 KFILTER_SDSS 6030 0.6928 0.4852 0.4718 0.4587 0.4460 KFILTER_SDSS 6080 0.6913 0.4864 0.4737 0.4614 0.4493 KFILTER_SDSS 6130 0.6893 0.4869 0.4749 0.4632 0.4517 KFILTER_SDSS 6180 0.6920 0.4901 0.4786 0.4673 0.4563 KFILTER_SDSS 6230 0.6976 0.4950 0.4838 0.4728 0.4621 KFILTER_SDSS 6280 0.7030 0.4994 0.4885 0.4777 0.4673 KFILTER_SDSS 6330 0.7069 0.5025 0.4918 0.4814 0.4711 KFILTER_SDSS 6380 0.7087 0.5041 0.4936 0.4834 0.4734 KFILTER_SDSS 6430 0.7094 0.5048 0.4946 0.4847 0.4749 KFILTER_SDSS 6480 0.7098 0.5053 0.4954 0.4858 0.4762 KFILTER_SDSS 6530 0.7061 0.5031 0.4936 0.4843 0.4751 KFILTER_SDSS 6580 0.6982 0.4975 0.4883 0.4793 0.4704 KFILTER_SDSS 6630 0.6836 0.4856 0.4764 0.4674 0.4585 KFILTER_SDSS 6680 0.6021 0.4255 0.4170 0.4086 0.4005 KFILTER_SDSS 6730 0.4536 0.3206 0.3144 0.3083 0.3023 KFILTER_SDSS 6780 0.2673 0.1911 0.1881 0.1852 0.1823 KFILTER_SDSS 6830 0.1098 0.0770 0.0755 0.0739 0.0724 KFILTER_SDSS 6880 0.0360 0.0240 0.0231 0.0223 0.0215 KFILTER_SDSS 6930 0.0163 0.0111 0.0108 0.0105 0.0102 KFILTER_SDSS 6980 0.0086 0.0061 0.0060 0.0059 0.0058 KFILTER_SDSS 7030 0.0040 0.0029 0.0028 0.0028 0.0028 KFILTER_SDSS 7080 0.0021 0.0015 0.0015 0.0015 0.0015 KFILTER_SDSS 7130 0.0014 0.0010 0.0010 0.0010 0.0010 KFILTER_SDSS 7180 0.0006 0.0004 0.0004 0.0004 0.0004 KFILTER_SDSS 7230 0.0000 0.0000 0.0000 0.0000 0.0000