# 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): g # # 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 3630 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 3680 0.0019 0.0010 0.0008 0.0007 0.0007 KFILTER_SDSS 3730 0.0048 0.0025 0.0022 0.0020 0.0017 KFILTER_SDSS 3780 0.0116 0.0061 0.0054 0.0048 0.0043 KFILTER_SDSS 3830 0.0386 0.0205 0.0184 0.0165 0.0148 KFILTER_SDSS 3880 0.0970 0.0526 0.0475 0.0428 0.0386 KFILTER_SDSS 3930 0.1724 0.0957 0.0868 0.0788 0.0715 KFILTER_SDSS 3980 0.2465 0.1400 0.1279 0.1168 0.1067 KFILTER_SDSS 4030 0.3091 0.1790 0.1644 0.1509 0.1386 KFILTER_SDSS 4080 0.3545 0.2084 0.1922 0.1772 0.1634 KFILTER_SDSS 4130 0.3866 0.2303 0.2132 0.1973 0.1826 KFILTER_SDSS 4180 0.4110 0.2479 0.2303 0.2139 0.1986 KFILTER_SDSS 4230 0.4303 0.2626 0.2447 0.2280 0.2124 KFILTER_SDSS 4280 0.4465 0.2755 0.2574 0.2406 0.2248 KFILTER_SDSS 4330 0.4611 0.2873 0.2693 0.2523 0.2365 KFILTER_SDSS 4380 0.4750 0.2988 0.2808 0.2639 0.2479 KFILTER_SDSS 4430 0.4872 0.3093 0.2914 0.2746 0.2587 KFILTER_SDSS 4480 0.4968 0.3182 0.3006 0.2839 0.2682 KFILTER_SDSS 4530 0.5062 0.3270 0.3096 0.2931 0.2775 KFILTER_SDSS 4580 0.5174 0.3367 0.3195 0.3032 0.2877 KFILTER_SDSS 4630 0.5281 0.3461 0.3291 0.3129 0.2975 KFILTER_SDSS 4680 0.5357 0.3532 0.3364 0.3205 0.3053 KFILTER_SDSS 4730 0.5406 0.3582 0.3417 0.3259 0.3109 KFILTER_SDSS 4780 0.5440 0.3620 0.3457 0.3303 0.3155 KFILTER_SDSS 4830 0.5484 0.3665 0.3505 0.3353 0.3207 KFILTER_SDSS 4880 0.5555 0.3728 0.3571 0.3421 0.3276 KFILTER_SDSS 4930 0.5634 0.3795 0.3639 0.3490 0.3346 KFILTER_SDSS 4980 0.5699 0.3849 0.3694 0.3546 0.3403 KFILTER_SDSS 5030 0.5755 0.3895 0.3741 0.3593 0.3450 KFILTER_SDSS 5080 0.5801 0.3933 0.3779 0.3632 0.3490 KFILTER_SDSS 5130 0.5795 0.3935 0.3784 0.3638 0.3498 KFILTER_SDSS 5180 0.5738 0.3903 0.3755 0.3612 0.3475 KFILTER_SDSS 5230 0.5568 0.3795 0.3653 0.3517 0.3386 KFILTER_SDSS 5280 0.4561 0.3115 0.3001 0.2891 0.2785 KFILTER_SDSS 5330 0.3011 0.2060 0.1986 0.1915 0.1846 KFILTER_SDSS 5380 0.1502 0.1030 0.0994 0.0959 0.0925 KFILTER_SDSS 5430 0.0486 0.0334 0.0322 0.0311 0.0300 KFILTER_SDSS 5480 0.0174 0.0120 0.0115 0.0111 0.0108 KFILTER_SDSS 5530 0.0083 0.0057 0.0055 0.0053 0.0051 KFILTER_SDSS 5580 0.0038 0.0026 0.0026 0.0025 0.0024 KFILTER_SDSS 5630 0.0020 0.0014 0.0013 0.0013 0.0012 KFILTER_SDSS 5680 0.0013 0.0009 0.0009 0.0009 0.0008 KFILTER_SDSS 5730 0.0010 0.0007 0.0007 0.0007 0.0006 KFILTER_SDSS 5780 0.0005 0.0004 0.0003 0.0003 0.0003 KFILTER_SDSS 5830 0.0000 0.0000 0.0000 0.0000 0.0000