# 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 4 # # 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 0.0002 0.0001 0.0001 0.0001 0.0001 KFILTER_SDSS 3730 0.0015 0.0008 0.0007 0.0006 0.0006 KFILTER_SDSS 3780 0.0041 0.0021 0.0019 0.0017 0.0015 KFILTER_SDSS 3830 0.0118 0.0063 0.0056 0.0051 0.0045 KFILTER_SDSS 3880 0.0476 0.0258 0.0233 0.0210 0.0189 KFILTER_SDSS 3930 0.1095 0.0608 0.0552 0.0501 0.0454 KFILTER_SDSS 3980 0.1862 0.1058 0.0966 0.0883 0.0806 KFILTER_SDSS 4030 0.2600 0.1505 0.1382 0.1269 0.1166 KFILTER_SDSS 4080 0.3154 0.1854 0.1710 0.1577 0.1454 KFILTER_SDSS 4130 0.3537 0.2108 0.1951 0.1806 0.1671 KFILTER_SDSS 4180 0.3800 0.2292 0.2129 0.1977 0.1837 KFILTER_SDSS 4230 0.3989 0.2435 0.2269 0.2114 0.1969 KFILTER_SDSS 4280 0.4145 0.2557 0.2390 0.2233 0.2087 KFILTER_SDSS 4330 0.4280 0.2667 0.2499 0.2342 0.2195 KFILTER_SDSS 4380 0.4395 0.2765 0.2598 0.2441 0.2294 KFILTER_SDSS 4430 0.4484 0.2847 0.2682 0.2527 0.2381 KFILTER_SDSS 4480 0.4545 0.2912 0.2750 0.2597 0.2453 KFILTER_SDSS 4530 0.4604 0.2974 0.2816 0.2666 0.2524 KFILTER_SDSS 4580 0.4684 0.3049 0.2893 0.2745 0.2605 KFILTER_SDSS 4630 0.4759 0.3119 0.2966 0.2820 0.2681 KFILTER_SDSS 4680 0.4801 0.3165 0.3015 0.2872 0.2736 KFILTER_SDSS 4730 0.4824 0.3196 0.3049 0.2909 0.2775 KFILTER_SDSS 4780 0.4848 0.3226 0.3081 0.2943 0.2811 KFILTER_SDSS 4830 0.4874 0.3258 0.3116 0.2980 0.2851 KFILTER_SDSS 4880 0.4903 0.3291 0.3152 0.3019 0.2892 KFILTER_SDSS 4930 0.4936 0.3325 0.3189 0.3058 0.2932 KFILTER_SDSS 4980 0.4976 0.3361 0.3225 0.3095 0.2971 KFILTER_SDSS 5030 0.5009 0.3390 0.3255 0.3127 0.3003 KFILTER_SDSS 5080 0.5020 0.3403 0.3271 0.3143 0.3020 KFILTER_SDSS 5130 0.5002 0.3397 0.3266 0.3140 0.3020 KFILTER_SDSS 5180 0.4950 0.3367 0.3240 0.3117 0.2999 KFILTER_SDSS 5230 0.4715 0.3213 0.3093 0.2978 0.2867 KFILTER_SDSS 5280 0.3783 0.2584 0.2489 0.2398 0.2310 KFILTER_SDSS 5330 0.2448 0.1675 0.1615 0.1557 0.1501 KFILTER_SDSS 5380 0.1202 0.0824 0.0795 0.0767 0.0740 KFILTER_SDSS 5430 0.0391 0.0269 0.0259 0.0250 0.0242 KFILTER_SDSS 5480 0.0154 0.0106 0.0102 0.0099 0.0095 KFILTER_SDSS 5530 0.0065 0.0045 0.0043 0.0042 0.0040 KFILTER_SDSS 5580 0.0025 0.0018 0.0017 0.0016 0.0016 KFILTER_SDSS 5630 0.0016 0.0011 0.0011 0.0011 0.0010 KFILTER_SDSS 5680 0.0013 0.0009 0.0009 0.0008 0.0008 KFILTER_SDSS 5730 0.0009 0.0006 0.0006 0.0006 0.0005 KFILTER_SDSS 5780 0.0004 0.0003 0.0003 0.0002 0.0002 KFILTER_SDSS 5830 0.0000 0.0000 0.0000 0.0000 0.0000