# 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 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 3630 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 3680 0.0003 0.0001 0.0001 0.0001 0.0001 KFILTER_SDSS 3730 0.0015 0.0008 0.0007 0.0006 0.0005 KFILTER_SDSS 3780 0.0040 0.0021 0.0019 0.0017 0.0015 KFILTER_SDSS 3830 0.0118 0.0063 0.0056 0.0051 0.0045 KFILTER_SDSS 3880 0.0465 0.0252 0.0227 0.0205 0.0185 KFILTER_SDSS 3930 0.1062 0.0590 0.0535 0.0486 0.0441 KFILTER_SDSS 3980 0.1803 0.1024 0.0935 0.0854 0.0780 KFILTER_SDSS 4030 0.2514 0.1456 0.1337 0.1228 0.1127 KFILTER_SDSS 4080 0.3047 0.1791 0.1652 0.1523 0.1405 KFILTER_SDSS 4130 0.3410 0.2032 0.1881 0.1741 0.1611 KFILTER_SDSS 4180 0.3654 0.2205 0.2048 0.1902 0.1766 KFILTER_SDSS 4230 0.3829 0.2337 0.2178 0.2029 0.1890 KFILTER_SDSS 4280 0.3977 0.2454 0.2293 0.2143 0.2002 KFILTER_SDSS 4330 0.4109 0.2561 0.2400 0.2249 0.2108 KFILTER_SDSS 4380 0.4227 0.2659 0.2499 0.2348 0.2206 KFILTER_SDSS 4430 0.4320 0.2743 0.2584 0.2435 0.2294 KFILTER_SDSS 4480 0.4385 0.2809 0.2653 0.2506 0.2367 KFILTER_SDSS 4530 0.4446 0.2872 0.2719 0.2574 0.2437 KFILTER_SDSS 4580 0.4522 0.2944 0.2793 0.2651 0.2515 KFILTER_SDSS 4630 0.4595 0.3011 0.2863 0.2722 0.2589 KFILTER_SDSS 4680 0.4639 0.3058 0.2913 0.2775 0.2643 KFILTER_SDSS 4730 0.4666 0.3091 0.2949 0.2813 0.2684 KFILTER_SDSS 4780 0.4692 0.3122 0.2982 0.2848 0.2721 KFILTER_SDSS 4830 0.4720 0.3154 0.3017 0.2886 0.2760 KFILTER_SDSS 4880 0.4750 0.3188 0.3054 0.2925 0.2802 KFILTER_SDSS 4930 0.4786 0.3224 0.3091 0.2964 0.2843 KFILTER_SDSS 4980 0.4828 0.3261 0.3129 0.3003 0.2882 KFILTER_SDSS 5030 0.4868 0.3295 0.3164 0.3039 0.2918 KFILTER_SDSS 5080 0.4894 0.3318 0.3189 0.3064 0.2945 KFILTER_SDSS 5130 0.4885 0.3317 0.3189 0.3067 0.2949 KFILTER_SDSS 5180 0.4836 0.3289 0.3164 0.3044 0.2929 KFILTER_SDSS 5230 0.4648 0.3168 0.3050 0.2936 0.2826 KFILTER_SDSS 5280 0.3782 0.2583 0.2488 0.2397 0.2310 KFILTER_SDSS 5330 0.2491 0.1705 0.1644 0.1585 0.1528 KFILTER_SDSS 5380 0.1247 0.0855 0.0825 0.0795 0.0767 KFILTER_SDSS 5430 0.0410 0.0281 0.0272 0.0262 0.0253 KFILTER_SDSS 5480 0.0149 0.0103 0.0099 0.0096 0.0092 KFILTER_SDSS 5530 0.0069 0.0047 0.0046 0.0044 0.0043 KFILTER_SDSS 5580 0.0031 0.0021 0.0020 0.0020 0.0019 KFILTER_SDSS 5630 0.0016 0.0011 0.0011 0.0010 0.0010 KFILTER_SDSS 5680 0.0011 0.0008 0.0007 0.0007 0.0007 KFILTER_SDSS 5730 0.0008 0.0006 0.0006 0.0005 0.0005 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