# 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): r # # 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 5230 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 5280 0.0020 0.0014 0.0013 0.0013 0.0012 KFILTER_SDSS 5330 0.0013 0.0009 0.0008 0.0008 0.0008 KFILTER_SDSS 5380 -0.0027 -0.0019 -0.0018 -0.0017 -0.0017 KFILTER_SDSS 5430 0.0100 0.0069 0.0066 0.0064 0.0062 KFILTER_SDSS 5480 0.0601 0.0413 0.0399 0.0385 0.0372 KFILTER_SDSS 5530 0.1513 0.1040 0.1005 0.0971 0.0937 KFILTER_SDSS 5580 0.2765 0.1902 0.1838 0.1775 0.1715 KFILTER_SDSS 5630 0.4015 0.2764 0.2671 0.2580 0.2493 KFILTER_SDSS 5680 0.4938 0.3401 0.3286 0.3176 0.3069 KFILTER_SDSS 5730 0.5534 0.3814 0.3686 0.3563 0.3445 KFILTER_SDSS 5780 0.5886 0.4060 0.3926 0.3797 0.3672 KFILTER_SDSS 5830 0.6078 0.4200 0.4064 0.3932 0.3805 KFILTER_SDSS 5880 0.6189 0.4286 0.4150 0.4019 0.3892 KFILTER_SDSS 5930 0.6262 0.4349 0.4217 0.4088 0.3963 KFILTER_SDSS 5980 0.6324 0.4409 0.4280 0.4154 0.4033 KFILTER_SDSS 6030 0.6359 0.4453 0.4330 0.4210 0.4093 KFILTER_SDSS 6080 0.6354 0.4470 0.4354 0.4240 0.4130 KFILTER_SDSS 6130 0.6346 0.4483 0.4372 0.4264 0.4159 KFILTER_SDSS 6180 0.6375 0.4516 0.4409 0.4306 0.4205 KFILTER_SDSS 6230 0.6433 0.4564 0.4461 0.4360 0.4262 KFILTER_SDSS 6280 0.6497 0.4615 0.4514 0.4415 0.4318 KFILTER_SDSS 6330 0.6537 0.4647 0.4548 0.4451 0.4357 KFILTER_SDSS 6380 0.6535 0.4648 0.4552 0.4458 0.4365 KFILTER_SDSS 6430 0.6523 0.4641 0.4548 0.4456 0.4366 KFILTER_SDSS 6480 0.6529 0.4648 0.4557 0.4468 0.4380 KFILTER_SDSS 6530 0.6509 0.4638 0.4550 0.4464 0.4380 KFILTER_SDSS 6580 0.6441 0.4589 0.4504 0.4421 0.4339 KFILTER_SDSS 6630 0.6266 0.4451 0.4367 0.4284 0.4203 KFILTER_SDSS 6680 0.5445 0.3848 0.3771 0.3696 0.3622 KFILTER_SDSS 6730 0.4040 0.2856 0.2800 0.2746 0.2693 KFILTER_SDSS 6780 0.2366 0.1692 0.1666 0.1640 0.1614 KFILTER_SDSS 6830 0.0982 0.0689 0.0675 0.0661 0.0647 KFILTER_SDSS 6880 0.0329 0.0219 0.0211 0.0204 0.0196 KFILTER_SDSS 6930 0.0148 0.0101 0.0098 0.0095 0.0092 KFILTER_SDSS 6980 0.0077 0.0055 0.0054 0.0053 0.0052 KFILTER_SDSS 7030 0.0038 0.0027 0.0026 0.0026 0.0026 KFILTER_SDSS 7080 0.0021 0.0015 0.0015 0.0015 0.0015 KFILTER_SDSS 7130 0.0014 0.0010 0.0010 0.0009 0.0009 KFILTER_SDSS 7180 0.0006 0.0004 0.0004 0.0004 0.0004 KFILTER_SDSS 7230 0.0000 0.0000 0.0000 0.0000 0.0000