# 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 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 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 0.0007 0.0005 0.0005 0.0005 0.0005 KFILTER_SDSS 8010 0.0025 0.0017 0.0017 0.0017 0.0017 KFILTER_SDSS 8080 0.0078 0.0053 0.0052 0.0052 0.0051 KFILTER_SDSS 8150 0.0210 0.0132 0.0129 0.0125 0.0122 KFILTER_SDSS 8220 0.0432 0.0265 0.0255 0.0246 0.0237 KFILTER_SDSS 8290 0.0689 0.0436 0.0424 0.0413 0.0401 KFILTER_SDSS 8360 0.0898 0.0602 0.0594 0.0587 0.0580 KFILTER_SDSS 8430 0.1033 0.0695 0.0686 0.0677 0.0668 KFILTER_SDSS 8500 0.1131 0.0767 0.0757 0.0748 0.0738 KFILTER_SDSS 8570 0.1191 0.0817 0.0807 0.0797 0.0787 KFILTER_SDSS 8640 0.1200 0.0831 0.0821 0.0811 0.0801 KFILTER_SDSS 8710 0.1152 0.0805 0.0795 0.0785 0.0775 KFILTER_SDSS 8780 0.1067 0.0752 0.0742 0.0732 0.0723 KFILTER_SDSS 8850 0.0973 0.0695 0.0686 0.0677 0.0668 KFILTER_SDSS 8920 0.0891 0.0635 0.0624 0.0614 0.0603 KFILTER_SDSS 8990 0.0814 0.0534 0.0511 0.0489 0.0467 KFILTER_SDSS 9060 0.0742 0.0514 0.0497 0.0482 0.0466 KFILTER_SDSS 9130 0.0678 0.0471 0.0455 0.0440 0.0425 KFILTER_SDSS 9200 0.0619 0.0453 0.0444 0.0434 0.0425 KFILTER_SDSS 9270 0.0567 0.0391 0.0375 0.0359 0.0344 KFILTER_SDSS 9340 0.0522 0.0275 0.0243 0.0214 0.0189 KFILTER_SDSS 9410 0.0483 0.0281 0.0255 0.0231 0.0210 KFILTER_SDSS 9480 0.0454 0.0258 0.0232 0.0208 0.0187 KFILTER_SDSS 9550 0.0428 0.0252 0.0228 0.0207 0.0188 KFILTER_SDSS 9620 0.0396 0.0264 0.0248 0.0233 0.0219 KFILTER_SDSS 9690 0.0347 0.0265 0.0259 0.0253 0.0247 KFILTER_SDSS 9760 0.0290 0.0215 0.0208 0.0202 0.0195 KFILTER_SDSS 9830 0.0236 0.0187 0.0184 0.0181 0.0178 KFILTER_SDSS 9900 0.0193 0.0156 0.0154 0.0153 0.0151 KFILTER_SDSS 9970 0.0161 0.0130 0.0128 0.0127 0.0125 KFILTER_SDSS 10040 0.0134 0.0108 0.0107 0.0105 0.0104 KFILTER_SDSS 10110 0.0109 0.0088 0.0086 0.0085 0.0084 KFILTER_SDSS 10180 0.0086 0.0069 0.0068 0.0067 0.0066 KFILTER_SDSS 10250 0.0066 0.0053 0.0052 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 0.0021 KFILTER_SDSS 10530 0.0021 0.0017 0.0017 0.0017 0.0017 KFILTER_SDSS 10600 0.0017 0.0014 0.0014 0.0014 0.0013 KFILTER_SDSS 10670 0.0014 0.0011 0.0011 0.0011 0.0011 KFILTER_SDSS 10740 0.0011 0.0009 0.0009 0.0009 0.0008 KFILTER_SDSS 10810 0.0008 0.0007 0.0007 0.0007 0.0007 KFILTER_SDSS 10880 0.0007 0.0006 0.0005 0.0005 0.0005 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