# 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 5 # # 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 0.0017 0.0009 0.0008 0.0007 0.0006 KFILTER_SDSS 3780 0.0046 0.0024 0.0021 0.0019 0.0017 KFILTER_SDSS 3830 0.0134 0.0071 0.0064 0.0058 0.0052 KFILTER_SDSS 3880 0.0532 0.0289 0.0261 0.0235 0.0212 KFILTER_SDSS 3930 0.1214 0.0674 0.0611 0.0555 0.0504 KFILTER_SDSS 3980 0.2050 0.1164 0.1063 0.0971 0.0887 KFILTER_SDSS 4030 0.2853 0.1652 0.1517 0.1394 0.1280 KFILTER_SDSS 4080 0.3465 0.2037 0.1879 0.1732 0.1598 KFILTER_SDSS 4130 0.3890 0.2318 0.2145 0.1986 0.1838 KFILTER_SDSS 4180 0.4178 0.2521 0.2341 0.2174 0.2020 KFILTER_SDSS 4230 0.4383 0.2675 0.2493 0.2322 0.2164 KFILTER_SDSS 4280 0.4551 0.2808 0.2624 0.2452 0.2291 KFILTER_SDSS 4330 0.4699 0.2928 0.2744 0.2572 0.2410 KFILTER_SDSS 4380 0.4832 0.3040 0.2857 0.2684 0.2522 KFILTER_SDSS 4430 0.4940 0.3137 0.2955 0.2784 0.2623 KFILTER_SDSS 4480 0.5017 0.3214 0.3035 0.2867 0.2708 KFILTER_SDSS 4530 0.5089 0.3288 0.3113 0.2947 0.2790 KFILTER_SDSS 4580 0.5183 0.3374 0.3201 0.3038 0.2883 KFILTER_SDSS 4630 0.5273 0.3456 0.3286 0.3124 0.2971 KFILTER_SDSS 4680 0.5332 0.3515 0.3348 0.3189 0.3038 KFILTER_SDSS 4730 0.5366 0.3555 0.3391 0.3235 0.3086 KFILTER_SDSS 4780 0.5391 0.3587 0.3427 0.3273 0.3126 KFILTER_SDSS 4830 0.5422 0.3624 0.3466 0.3315 0.3171 KFILTER_SDSS 4880 0.5469 0.3671 0.3516 0.3368 0.3226 KFILTER_SDSS 4930 0.5523 0.3721 0.3568 0.3421 0.3281 KFILTER_SDSS 4980 0.5577 0.3767 0.3615 0.3469 0.3330 KFILTER_SDSS 5030 0.5627 0.3808 0.3658 0.3513 0.3374 KFILTER_SDSS 5080 0.5667 0.3842 0.3692 0.3548 0.3409 KFILTER_SDSS 5130 0.5656 0.3841 0.3693 0.3551 0.3414 KFILTER_SDSS 5180 0.5601 0.3810 0.3665 0.3527 0.3393 KFILTER_SDSS 5230 0.5456 0.3718 0.3580 0.3446 0.3318 KFILTER_SDSS 5280 0.4510 0.3080 0.2967 0.2858 0.2754 KFILTER_SDSS 5330 0.3015 0.2063 0.1989 0.1918 0.1849 KFILTER_SDSS 5380 0.1514 0.1038 0.1002 0.0966 0.0932 KFILTER_SDSS 5430 0.0485 0.0333 0.0321 0.0310 0.0299 KFILTER_SDSS 5480 0.0172 0.0118 0.0114 0.0110 0.0107 KFILTER_SDSS 5530 0.0084 0.0058 0.0056 0.0054 0.0052 KFILTER_SDSS 5580 0.0040 0.0028 0.0027 0.0026 0.0025 KFILTER_SDSS 5630 0.0020 0.0014 0.0013 0.0013 0.0012 KFILTER_SDSS 5680 0.0014 0.0009 0.0009 0.0009 0.0008 KFILTER_SDSS 5730 0.0011 0.0008 0.0007 0.0007 0.0007 KFILTER_SDSS 5780 0.0005 0.0004 0.0004 0.0003 0.0003 KFILTER_SDSS 5830 0.0000 0.0000 0.0000 0.0000 0.0000