# 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 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 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 0.0029 0.0020 0.0019 0.0019 0.0019 KFILTER_SDSS 8080 0.0085 0.0057 0.0057 0.0056 0.0056 KFILTER_SDSS 8150 0.0206 0.0130 0.0127 0.0123 0.0120 KFILTER_SDSS 8220 0.0389 0.0239 0.0230 0.0222 0.0214 KFILTER_SDSS 8290 0.0576 0.0365 0.0355 0.0345 0.0335 KFILTER_SDSS 8360 0.0732 0.0491 0.0485 0.0479 0.0473 KFILTER_SDSS 8430 0.0848 0.0570 0.0563 0.0555 0.0548 KFILTER_SDSS 8500 0.0926 0.0628 0.0620 0.0612 0.0604 KFILTER_SDSS 8570 0.0978 0.0671 0.0662 0.0654 0.0646 KFILTER_SDSS 8640 0.1014 0.0702 0.0694 0.0685 0.0677 KFILTER_SDSS 8710 0.1039 0.0726 0.0717 0.0707 0.0698 KFILTER_SDSS 8780 0.1038 0.0732 0.0722 0.0713 0.0703 KFILTER_SDSS 8850 0.1010 0.0721 0.0712 0.0703 0.0694 KFILTER_SDSS 8920 0.0962 0.0685 0.0674 0.0663 0.0651 KFILTER_SDSS 8990 0.0893 0.0587 0.0561 0.0536 0.0513 KFILTER_SDSS 9060 0.0813 0.0563 0.0545 0.0528 0.0511 KFILTER_SDSS 9130 0.0742 0.0515 0.0498 0.0481 0.0465 KFILTER_SDSS 9200 0.0699 0.0512 0.0501 0.0490 0.0480 KFILTER_SDSS 9270 0.0666 0.0458 0.0439 0.0421 0.0404 KFILTER_SDSS 9340 0.0626 0.0330 0.0291 0.0257 0.0227 KFILTER_SDSS 9410 0.0581 0.0338 0.0307 0.0278 0.0252 KFILTER_SDSS 9480 0.0540 0.0306 0.0275 0.0247 0.0222 KFILTER_SDSS 9550 0.0503 0.0296 0.0268 0.0243 0.0220 KFILTER_SDSS 9620 0.0466 0.0311 0.0292 0.0275 0.0258 KFILTER_SDSS 9690 0.0425 0.0324 0.0316 0.0309 0.0302 KFILTER_SDSS 9760 0.0379 0.0282 0.0272 0.0263 0.0255 KFILTER_SDSS 9830 0.0331 0.0262 0.0258 0.0254 0.0250 KFILTER_SDSS 9900 0.0280 0.0226 0.0223 0.0221 0.0219 KFILTER_SDSS 9970 0.0230 0.0186 0.0183 0.0181 0.0179 KFILTER_SDSS 10040 0.0184 0.0148 0.0146 0.0144 0.0143 KFILTER_SDSS 10110 0.0143 0.0116 0.0114 0.0113 0.0111 KFILTER_SDSS 10180 0.0109 0.0088 0.0087 0.0086 0.0085 KFILTER_SDSS 10250 0.0082 0.0066 0.0065 0.0065 0.0064 KFILTER_SDSS 10320 0.0061 0.0050 0.0049 0.0048 0.0048 KFILTER_SDSS 10390 0.0046 0.0038 0.0037 0.0037 0.0036 KFILTER_SDSS 10460 0.0036 0.0029 0.0029 0.0028 0.0028 KFILTER_SDSS 10530 0.0029 0.0023 0.0023 0.0023 0.0022 KFILTER_SDSS 10600 0.0023 0.0019 0.0019 0.0018 0.0018 KFILTER_SDSS 10670 0.0019 0.0015 0.0015 0.0015 0.0015 KFILTER_SDSS 10740 0.0015 0.0012 0.0012 0.0012 0.0012 KFILTER_SDSS 10810 0.0011 0.0009 0.0009 0.0009 0.0009 KFILTER_SDSS 10880 0.0009 0.0007 0.0007 0.0007 0.0007 KFILTER_SDSS 10950 0.0007 0.0006 0.0006 0.0006 0.0006 KFILTER_SDSS 11020 0.0006 0.0005 0.0005 0.0005 0.0005 KFILTER_SDSS 11090 0.0004 0.0003 0.0003 0.0003 0.0003 KFILTER_SDSS 11160 0.0002 0.0001 0.0001 0.0001 0.0001 KFILTER_SDSS 11230 0.0000 0.0000 0.0000 0.0000 0.0000