# 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 2 # # 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 0.0023 0.0012 0.0010 0.0009 0.0008 KFILTER_SDSS 3730 0.0051 0.0026 0.0023 0.0021 0.0018 KFILTER_SDSS 3780 0.0120 0.0063 0.0056 0.0050 0.0045 KFILTER_SDSS 3830 0.0440 0.0234 0.0210 0.0189 0.0169 KFILTER_SDSS 3880 0.1089 0.0591 0.0533 0.0481 0.0434 KFILTER_SDSS 3930 0.1914 0.1062 0.0964 0.0875 0.0794 KFILTER_SDSS 3980 0.2727 0.1549 0.1415 0.1292 0.1180 KFILTER_SDSS 4030 0.3403 0.1970 0.1809 0.1662 0.1526 KFILTER_SDSS 4080 0.3865 0.2272 0.2096 0.1933 0.1782 KFILTER_SDSS 4130 0.4172 0.2486 0.2301 0.2130 0.1971 KFILTER_SDSS 4180 0.4402 0.2656 0.2467 0.2291 0.2128 KFILTER_SDSS 4230 0.4589 0.2801 0.2610 0.2432 0.2266 KFILTER_SDSS 4280 0.4751 0.2931 0.2739 0.2560 0.2392 KFILTER_SDSS 4330 0.4895 0.3050 0.2858 0.2679 0.2510 KFILTER_SDSS 4380 0.5024 0.3161 0.2970 0.2791 0.2622 KFILTER_SDSS 4430 0.5131 0.3258 0.3069 0.2892 0.2724 KFILTER_SDSS 4480 0.5213 0.3339 0.3154 0.2979 0.2814 KFILTER_SDSS 4530 0.5296 0.3421 0.3239 0.3067 0.2903 KFILTER_SDSS 4580 0.5401 0.3515 0.3336 0.3165 0.3004 KFILTER_SDSS 4630 0.5499 0.3604 0.3427 0.3258 0.3098 KFILTER_SDSS 4680 0.5561 0.3666 0.3492 0.3326 0.3169 KFILTER_SDSS 4730 0.5598 0.3709 0.3538 0.3375 0.3220 KFILTER_SDSS 4780 0.5632 0.3747 0.3579 0.3419 0.3266 KFILTER_SDSS 4830 0.5671 0.3790 0.3625 0.3467 0.3317 KFILTER_SDSS 4880 0.5721 0.3840 0.3678 0.3523 0.3375 KFILTER_SDSS 4930 0.5778 0.3892 0.3732 0.3579 0.3432 KFILTER_SDSS 4980 0.5833 0.3939 0.3781 0.3629 0.3482 KFILTER_SDSS 5030 0.5880 0.3980 0.3822 0.3671 0.3525 KFILTER_SDSS 5080 0.5911 0.4008 0.3851 0.3701 0.3557 KFILTER_SDSS 5130 0.5899 0.4006 0.3852 0.3703 0.3561 KFILTER_SDSS 5180 0.5839 0.3972 0.3821 0.3676 0.3537 KFILTER_SDSS 5230 0.5608 0.3822 0.3679 0.3542 0.3410 KFILTER_SDSS 5280 0.4509 0.3079 0.2966 0.2858 0.2753 KFILTER_SDSS 5330 0.2899 0.1984 0.1913 0.1844 0.1778 KFILTER_SDSS 5380 0.1405 0.0963 0.0929 0.0896 0.0865 KFILTER_SDSS 5430 0.0447 0.0307 0.0296 0.0286 0.0276 KFILTER_SDSS 5480 0.0180 0.0124 0.0120 0.0116 0.0112 KFILTER_SDSS 5530 0.0076 0.0052 0.0050 0.0049 0.0047 KFILTER_SDSS 5580 0.0029 0.0020 0.0019 0.0018 0.0018 KFILTER_SDSS 5630 0.0019 0.0013 0.0013 0.0012 0.0012 KFILTER_SDSS 5680 0.0015 0.0011 0.0010 0.0010 0.0010 KFILTER_SDSS 5730 0.0010 0.0007 0.0007 0.0007 0.0006 KFILTER_SDSS 5780 0.0004 0.0003 0.0003 0.0003 0.0003 KFILTER_SDSS 5830 0.0000 0.0000 0.0000 0.0000 0.0000