# 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): z # # Instrument: SDSS telescope at APO Column 1 # # 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 7730 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 7800 0.0001 0.0001 0.0001 0.0001 0.0001 KFILTER_SDSS 7870 0.0003 0.0002 0.0002 0.0002 0.0002 KFILTER_SDSS 7940 0.0008 0.0006 0.0005 0.0005 0.0005 KFILTER_SDSS 8010 0.0027 0.0018 0.0018 0.0018 0.0018 KFILTER_SDSS 8080 0.0079 0.0053 0.0053 0.0052 0.0052 KFILTER_SDSS 8150 0.0204 0.0129 0.0125 0.0122 0.0118 KFILTER_SDSS 8220 0.0419 0.0257 0.0248 0.0239 0.0230 KFILTER_SDSS 8290 0.0691 0.0438 0.0426 0.0414 0.0403 KFILTER_SDSS 8360 0.0957 0.0642 0.0634 0.0626 0.0618 KFILTER_SDSS 8430 0.1157 0.0778 0.0768 0.0758 0.0748 KFILTER_SDSS 8500 0.1253 0.0850 0.0839 0.0828 0.0817 KFILTER_SDSS 8570 0.1266 0.0868 0.0857 0.0847 0.0836 KFILTER_SDSS 8640 0.1231 0.0853 0.0842 0.0832 0.0822 KFILTER_SDSS 8710 0.1175 0.0821 0.0810 0.0800 0.0790 KFILTER_SDSS 8780 0.1108 0.0781 0.0771 0.0760 0.0750 KFILTER_SDSS 8850 0.1030 0.0735 0.0726 0.0716 0.0707 KFILTER_SDSS 8920 0.0944 0.0673 0.0661 0.0650 0.0639 KFILTER_SDSS 8990 0.0867 0.0569 0.0544 0.0521 0.0498 KFILTER_SDSS 9060 0.0802 0.0555 0.0538 0.0521 0.0504 KFILTER_SDSS 9130 0.0750 0.0521 0.0504 0.0487 0.0471 KFILTER_SDSS 9200 0.0714 0.0523 0.0512 0.0501 0.0490 KFILTER_SDSS 9270 0.0675 0.0465 0.0446 0.0427 0.0410 KFILTER_SDSS 9340 0.0624 0.0329 0.0290 0.0256 0.0226 KFILTER_SDSS 9410 0.0567 0.0330 0.0299 0.0271 0.0246 KFILTER_SDSS 9480 0.0513 0.0291 0.0261 0.0235 0.0211 KFILTER_SDSS 9550 0.0464 0.0272 0.0247 0.0224 0.0203 KFILTER_SDSS 9620 0.0415 0.0277 0.0261 0.0245 0.0230 KFILTER_SDSS 9690 0.0365 0.0278 0.0272 0.0265 0.0259 KFILTER_SDSS 9760 0.0313 0.0232 0.0225 0.0218 0.0210 KFILTER_SDSS 9830 0.0264 0.0209 0.0206 0.0203 0.0200 KFILTER_SDSS 9900 0.0219 0.0177 0.0175 0.0173 0.0171 KFILTER_SDSS 9970 0.0179 0.0145 0.0143 0.0141 0.0140 KFILTER_SDSS 10040 0.0144 0.0117 0.0115 0.0114 0.0112 KFILTER_SDSS 10110 0.0114 0.0092 0.0091 0.0089 0.0088 KFILTER_SDSS 10180 0.0088 0.0071 0.0070 0.0069 0.0068 KFILTER_SDSS 10250 0.0066 0.0054 0.0053 0.0052 0.0051 KFILTER_SDSS 10320 0.0049 0.0040 0.0039 0.0039 0.0038 KFILTER_SDSS 10390 0.0037 0.0030 0.0029 0.0029 0.0028 KFILTER_SDSS 10460 0.0028 0.0022 0.0022 0.0022 0.0022 KFILTER_SDSS 10530 0.0022 0.0018 0.0017 0.0017 0.0017 KFILTER_SDSS 10600 0.0018 0.0014 0.0014 0.0014 0.0014 KFILTER_SDSS 10670 0.0015 0.0012 0.0012 0.0012 0.0011 KFILTER_SDSS 10740 0.0012 0.0010 0.0009 0.0009 0.0009 KFILTER_SDSS 10810 0.0009 0.0008 0.0008 0.0007 0.0007 KFILTER_SDSS 10880 0.0008 0.0006 0.0006 0.0006 0.0006 KFILTER_SDSS 10950 0.0006 0.0005 0.0005 0.0005 0.0005 KFILTER_SDSS 11020 0.0005 0.0004 0.0004 0.0004 0.0004 KFILTER_SDSS 11090 0.0003 0.0002 0.0002 0.0002 0.0002 KFILTER_SDSS 11160 0.0001 0.0001 0.0001 0.0001 0.0001 KFILTER_SDSS 11230 0.0000 0.0000 0.0000 0.0000 0.0000