# 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 3 # # 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 0.0016 0.0008 0.0007 0.0006 0.0006 KFILTER_SDSS 3780 0.0042 0.0022 0.0020 0.0018 0.0016 KFILTER_SDSS 3830 0.0110 0.0058 0.0052 0.0047 0.0042 KFILTER_SDSS 3880 0.0451 0.0245 0.0221 0.0199 0.0180 KFILTER_SDSS 3930 0.1066 0.0592 0.0537 0.0487 0.0442 KFILTER_SDSS 3980 0.1853 0.1052 0.0961 0.0878 0.0802 KFILTER_SDSS 4030 0.2623 0.1519 0.1395 0.1281 0.1176 KFILTER_SDSS 4080 0.3207 0.1885 0.1739 0.1603 0.1479 KFILTER_SDSS 4130 0.3618 0.2156 0.1995 0.1847 0.1709 KFILTER_SDSS 4180 0.3910 0.2359 0.2191 0.2035 0.1890 KFILTER_SDSS 4230 0.4121 0.2516 0.2344 0.2184 0.2035 KFILTER_SDSS 4280 0.4283 0.2642 0.2469 0.2307 0.2156 KFILTER_SDSS 4330 0.4419 0.2753 0.2580 0.2418 0.2266 KFILTER_SDSS 4380 0.4543 0.2858 0.2686 0.2524 0.2371 KFILTER_SDSS 4430 0.4642 0.2948 0.2777 0.2616 0.2465 KFILTER_SDSS 4480 0.4705 0.3014 0.2847 0.2689 0.2540 KFILTER_SDSS 4530 0.4762 0.3076 0.2913 0.2758 0.2611 KFILTER_SDSS 4580 0.4842 0.3152 0.2991 0.2838 0.2693 KFILTER_SDSS 4630 0.4918 0.3223 0.3065 0.2914 0.2771 KFILTER_SDSS 4680 0.4961 0.3270 0.3115 0.2967 0.2827 KFILTER_SDSS 4730 0.4984 0.3302 0.3150 0.3005 0.2866 KFILTER_SDSS 4780 0.5007 0.3332 0.3182 0.3040 0.2904 KFILTER_SDSS 4830 0.5031 0.3362 0.3216 0.3076 0.2943 KFILTER_SDSS 4880 0.5055 0.3393 0.3250 0.3113 0.2982 KFILTER_SDSS 4930 0.5087 0.3426 0.3286 0.3151 0.3021 KFILTER_SDSS 4980 0.5131 0.3466 0.3326 0.3192 0.3064 KFILTER_SDSS 5030 0.5171 0.3500 0.3361 0.3228 0.3100 KFILTER_SDSS 5080 0.5187 0.3517 0.3379 0.3247 0.3121 KFILTER_SDSS 5130 0.5170 0.3511 0.3376 0.3246 0.3121 KFILTER_SDSS 5180 0.5117 0.3481 0.3349 0.3222 0.3100 KFILTER_SDSS 5230 0.4870 0.3319 0.3195 0.3076 0.2961 KFILTER_SDSS 5280 0.3892 0.2658 0.2561 0.2467 0.2377 KFILTER_SDSS 5330 0.2499 0.1710 0.1649 0.1590 0.1533 KFILTER_SDSS 5380 0.1216 0.0834 0.0804 0.0776 0.0748 KFILTER_SDSS 5430 0.0393 0.0270 0.0260 0.0251 0.0242 KFILTER_SDSS 5480 0.0159 0.0109 0.0105 0.0102 0.0098 KFILTER_SDSS 5530 0.0066 0.0046 0.0044 0.0042 0.0041 KFILTER_SDSS 5580 0.0025 0.0017 0.0017 0.0016 0.0015 KFILTER_SDSS 5630 0.0017 0.0012 0.0011 0.0011 0.0011 KFILTER_SDSS 5680 0.0014 0.0009 0.0009 0.0009 0.0008 KFILTER_SDSS 5730 0.0009 0.0006 0.0006 0.0006 0.0006 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