# 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 6 # # 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 0.0014 0.0009 0.0009 0.0009 0.0008 KFILTER_SDSS 5380 -0.0026 -0.0018 -0.0017 -0.0016 -0.0016 KFILTER_SDSS 5430 0.0104 0.0071 0.0069 0.0066 0.0064 KFILTER_SDSS 5480 0.0621 0.0427 0.0412 0.0398 0.0384 KFILTER_SDSS 5530 0.1606 0.1104 0.1067 0.1030 0.0995 KFILTER_SDSS 5580 0.3011 0.2072 0.2002 0.1934 0.1868 KFILTER_SDSS 5630 0.4415 0.3039 0.2937 0.2837 0.2741 KFILTER_SDSS 5680 0.5411 0.3726 0.3601 0.3480 0.3363 KFILTER_SDSS 5730 0.6028 0.4154 0.4016 0.3882 0.3752 KFILTER_SDSS 5780 0.6399 0.4414 0.4268 0.4128 0.3992 KFILTER_SDSS 5830 0.6611 0.4567 0.4420 0.4276 0.4138 KFILTER_SDSS 5880 0.6737 0.4666 0.4518 0.4376 0.4237 KFILTER_SDSS 5930 0.6826 0.4741 0.4596 0.4456 0.4320 KFILTER_SDSS 5980 0.6905 0.4814 0.4673 0.4536 0.4404 KFILTER_SDSS 6030 0.6950 0.4867 0.4732 0.4601 0.4473 KFILTER_SDSS 6080 0.6939 0.4883 0.4755 0.4631 0.4510 KFILTER_SDSS 6130 0.6925 0.4891 0.4771 0.4653 0.4539 KFILTER_SDSS 6180 0.6957 0.4927 0.4812 0.4698 0.4588 KFILTER_SDSS 6230 0.7018 0.4979 0.4867 0.4757 0.4649 KFILTER_SDSS 6280 0.7075 0.5026 0.4916 0.4808 0.4702 KFILTER_SDSS 6330 0.7107 0.5052 0.4944 0.4839 0.4736 KFILTER_SDSS 6380 0.7103 0.5052 0.4948 0.4845 0.4745 KFILTER_SDSS 6430 0.7094 0.5048 0.4946 0.4846 0.4749 KFILTER_SDSS 6480 0.7101 0.5056 0.4957 0.4860 0.4765 KFILTER_SDSS 6530 0.7083 0.5047 0.4951 0.4858 0.4766 KFILTER_SDSS 6580 0.7010 0.4995 0.4903 0.4812 0.4723 KFILTER_SDSS 6630 0.6789 0.4822 0.4731 0.4642 0.4554 KFILTER_SDSS 6680 0.5821 0.4113 0.4031 0.3950 0.3871 KFILTER_SDSS 6730 0.4230 0.2990 0.2932 0.2875 0.2819 KFILTER_SDSS 6780 0.2415 0.1727 0.1700 0.1673 0.1647 KFILTER_SDSS 6830 0.0959 0.0673 0.0659 0.0645 0.0632 KFILTER_SDSS 6880 0.0305 0.0203 0.0195 0.0188 0.0182 KFILTER_SDSS 6930 0.0148 0.0100 0.0098 0.0095 0.0092 KFILTER_SDSS 6980 0.0082 0.0058 0.0057 0.0056 0.0055 KFILTER_SDSS 7030 0.0037 0.0026 0.0026 0.0025 0.0025 KFILTER_SDSS 7080 0.0018 0.0013 0.0013 0.0013 0.0013 KFILTER_SDSS 7130 0.0013 0.0010 0.0009 0.0009 0.0009 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