# 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 6 # # 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 0.0009 0.0006 0.0006 0.0006 0.0006 KFILTER_SDSS 8010 0.0028 0.0019 0.0019 0.0019 0.0019 KFILTER_SDSS 8080 0.0086 0.0058 0.0058 0.0057 0.0057 KFILTER_SDSS 8150 0.0226 0.0142 0.0139 0.0135 0.0131 KFILTER_SDSS 8220 0.0465 0.0285 0.0275 0.0265 0.0255 KFILTER_SDSS 8290 0.0764 0.0484 0.0471 0.0458 0.0445 KFILTER_SDSS 8360 0.1044 0.0700 0.0691 0.0683 0.0674 KFILTER_SDSS 8430 0.1253 0.0843 0.0832 0.0821 0.0810 KFILTER_SDSS 8500 0.1384 0.0939 0.0927 0.0915 0.0903 KFILTER_SDSS 8570 0.1439 0.0987 0.0974 0.0962 0.0950 KFILTER_SDSS 8640 0.1416 0.0981 0.0969 0.0957 0.0945 KFILTER_SDSS 8710 0.1322 0.0924 0.0912 0.0900 0.0889 KFILTER_SDSS 8780 0.1189 0.0839 0.0828 0.0817 0.0806 KFILTER_SDSS 8850 0.1058 0.0755 0.0745 0.0736 0.0726 KFILTER_SDSS 8920 0.0953 0.0679 0.0668 0.0656 0.0645 KFILTER_SDSS 8990 0.0873 0.0573 0.0548 0.0524 0.0501 KFILTER_SDSS 9060 0.0808 0.0559 0.0542 0.0524 0.0508 KFILTER_SDSS 9130 0.0752 0.0523 0.0505 0.0488 0.0472 KFILTER_SDSS 9200 0.0704 0.0515 0.0504 0.0494 0.0483 KFILTER_SDSS 9270 0.0659 0.0453 0.0435 0.0417 0.0400 KFILTER_SDSS 9340 0.0610 0.0321 0.0284 0.0250 0.0221 KFILTER_SDSS 9410 0.0558 0.0325 0.0294 0.0267 0.0242 KFILTER_SDSS 9480 0.0509 0.0289 0.0260 0.0233 0.0210 KFILTER_SDSS 9550 0.0463 0.0272 0.0247 0.0223 0.0203 KFILTER_SDSS 9620 0.0414 0.0276 0.0260 0.0244 0.0230 KFILTER_SDSS 9690 0.0358 0.0273 0.0267 0.0261 0.0255 KFILTER_SDSS 9760 0.0301 0.0223 0.0216 0.0209 0.0202 KFILTER_SDSS 9830 0.0248 0.0197 0.0194 0.0191 0.0188 KFILTER_SDSS 9900 0.0207 0.0167 0.0165 0.0163 0.0161 KFILTER_SDSS 9970 0.0173 0.0140 0.0138 0.0136 0.0135 KFILTER_SDSS 10040 0.0143 0.0116 0.0114 0.0113 0.0111 KFILTER_SDSS 10110 0.0115 0.0093 0.0092 0.0090 0.0089 KFILTER_SDSS 10180 0.0089 0.0072 0.0071 0.0070 0.0069 KFILTER_SDSS 10250 0.0066 0.0054 0.0053 0.0052 0.0052 KFILTER_SDSS 10320 0.0049 0.0040 0.0039 0.0039 0.0038 KFILTER_SDSS 10390 0.0036 0.0029 0.0029 0.0028 0.0028 KFILTER_SDSS 10460 0.0027 0.0022 0.0021 0.0021 0.0021 KFILTER_SDSS 10530 0.0021 0.0017 0.0017 0.0016 0.0016 KFILTER_SDSS 10600 0.0017 0.0014 0.0014 0.0013 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 0.0006 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 0.0003 0.0003 0.0003 0.0003 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