# 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 5 # # 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 0.0011 0.0008 0.0007 0.0007 0.0007 KFILTER_SDSS 5380 -0.0032 -0.0022 -0.0021 -0.0020 -0.0019 KFILTER_SDSS 5430 0.0117 0.0080 0.0077 0.0075 0.0072 KFILTER_SDSS 5480 0.0692 0.0475 0.0459 0.0443 0.0428 KFILTER_SDSS 5530 0.1743 0.1199 0.1158 0.1118 0.1080 KFILTER_SDSS 5580 0.3192 0.2196 0.2122 0.2050 0.1980 KFILTER_SDSS 5630 0.4629 0.3186 0.3079 0.2974 0.2874 KFILTER_SDSS 5680 0.5663 0.3900 0.3769 0.3642 0.3519 KFILTER_SDSS 5730 0.6312 0.4350 0.4205 0.4064 0.3929 KFILTER_SDSS 5780 0.6693 0.4617 0.4465 0.4318 0.4175 KFILTER_SDSS 5830 0.6905 0.4771 0.4616 0.4467 0.4322 KFILTER_SDSS 5880 0.7034 0.4871 0.4717 0.4568 0.4424 KFILTER_SDSS 5930 0.7127 0.4950 0.4799 0.4652 0.4510 KFILTER_SDSS 5980 0.7209 0.5026 0.4879 0.4736 0.4597 KFILTER_SDSS 6030 0.7256 0.5082 0.4941 0.4804 0.4671 KFILTER_SDSS 6080 0.7249 0.5101 0.4968 0.4838 0.4712 KFILTER_SDSS 6130 0.7235 0.5110 0.4984 0.4861 0.4742 KFILTER_SDSS 6180 0.7259 0.5142 0.5021 0.4903 0.4787 KFILTER_SDSS 6230 0.7312 0.5188 0.5071 0.4956 0.4844 KFILTER_SDSS 6280 0.7367 0.5233 0.5118 0.5006 0.4896 KFILTER_SDSS 6330 0.7396 0.5257 0.5145 0.5036 0.4929 KFILTER_SDSS 6380 0.7384 0.5252 0.5144 0.5037 0.4933 KFILTER_SDSS 6430 0.7369 0.5244 0.5138 0.5034 0.4933 KFILTER_SDSS 6480 0.7376 0.5252 0.5149 0.5048 0.4949 KFILTER_SDSS 6530 0.7347 0.5234 0.5136 0.5039 0.4943 KFILTER_SDSS 6580 0.7267 0.5177 0.5082 0.4988 0.4896 KFILTER_SDSS 6630 0.7068 0.5020 0.4925 0.4832 0.4741 KFILTER_SDSS 6680 0.5842 0.4128 0.4045 0.3964 0.3885 KFILTER_SDSS 6730 0.3993 0.2822 0.2768 0.2714 0.2661 KFILTER_SDSS 6780 0.2246 0.1606 0.1581 0.1557 0.1533 KFILTER_SDSS 6830 0.0973 0.0683 0.0669 0.0655 0.0642 KFILTER_SDSS 6880 0.0352 0.0234 0.0226 0.0218 0.0210 KFILTER_SDSS 6930 0.0146 0.0099 0.0097 0.0094 0.0091 KFILTER_SDSS 6980 0.0070 0.0049 0.0049 0.0048 0.0047 KFILTER_SDSS 7030 0.0039 0.0028 0.0027 0.0027 0.0027 KFILTER_SDSS 7080 0.0024 0.0018 0.0017 0.0017 0.0017 KFILTER_SDSS 7130 0.0015 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