# 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 4 # # 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 0.0006 0.0006 0.0005 KFILTER_SDSS 8010 0.0028 0.0019 0.0019 0.0019 0.0019 KFILTER_SDSS 8080 0.0085 0.0057 0.0057 0.0056 0.0056 KFILTER_SDSS 8150 0.0209 0.0132 0.0128 0.0125 0.0121 KFILTER_SDSS 8220 0.0399 0.0245 0.0236 0.0227 0.0219 KFILTER_SDSS 8290 0.0601 0.0381 0.0370 0.0360 0.0350 KFILTER_SDSS 8360 0.0748 0.0502 0.0495 0.0489 0.0483 KFILTER_SDSS 8430 0.0826 0.0556 0.0548 0.0541 0.0534 KFILTER_SDSS 8500 0.0873 0.0592 0.0584 0.0577 0.0569 KFILTER_SDSS 8570 0.0895 0.0614 0.0606 0.0599 0.0591 KFILTER_SDSS 8640 0.0908 0.0629 0.0622 0.0614 0.0606 KFILTER_SDSS 8710 0.0926 0.0647 0.0639 0.0631 0.0623 KFILTER_SDSS 8780 0.0928 0.0655 0.0646 0.0637 0.0629 KFILTER_SDSS 8850 0.0898 0.0641 0.0633 0.0625 0.0617 KFILTER_SDSS 8920 0.0836 0.0595 0.0585 0.0576 0.0566 KFILTER_SDSS 8990 0.0765 0.0502 0.0480 0.0459 0.0439 KFILTER_SDSS 9060 0.0699 0.0484 0.0468 0.0454 0.0439 KFILTER_SDSS 9130 0.0644 0.0447 0.0432 0.0418 0.0404 KFILTER_SDSS 9200 0.0599 0.0438 0.0429 0.0420 0.0411 KFILTER_SDSS 9270 0.0558 0.0384 0.0368 0.0353 0.0339 KFILTER_SDSS 9340 0.0516 0.0272 0.0240 0.0212 0.0187 KFILTER_SDSS 9410 0.0469 0.0273 0.0247 0.0224 0.0203 KFILTER_SDSS 9480 0.0427 0.0242 0.0217 0.0195 0.0176 KFILTER_SDSS 9550 0.0391 0.0230 0.0208 0.0189 0.0171 KFILTER_SDSS 9620 0.0360 0.0240 0.0226 0.0212 0.0200 KFILTER_SDSS 9690 0.0329 0.0251 0.0245 0.0240 0.0234 KFILTER_SDSS 9760 0.0298 0.0221 0.0214 0.0207 0.0200 KFILTER_SDSS 9830 0.0263 0.0209 0.0205 0.0202 0.0199 KFILTER_SDSS 9900 0.0226 0.0182 0.0180 0.0178 0.0176 KFILTER_SDSS 9970 0.0187 0.0151 0.0149 0.0147 0.0145 KFILTER_SDSS 10040 0.0149 0.0121 0.0119 0.0118 0.0116 KFILTER_SDSS 10110 0.0116 0.0094 0.0092 0.0091 0.0090 KFILTER_SDSS 10180 0.0087 0.0071 0.0070 0.0069 0.0068 KFILTER_SDSS 10250 0.0065 0.0052 0.0052 0.0051 0.0050 KFILTER_SDSS 10320 0.0048 0.0039 0.0038 0.0038 0.0037 KFILTER_SDSS 10390 0.0036 0.0029 0.0029 0.0029 0.0028 KFILTER_SDSS 10460 0.0028 0.0023 0.0023 0.0022 0.0022 KFILTER_SDSS 10530 0.0023 0.0019 0.0018 0.0018 0.0018 KFILTER_SDSS 10600 0.0019 0.0015 0.0015 0.0015 0.0015 KFILTER_SDSS 10670 0.0016 0.0013 0.0013 0.0012 0.0012 KFILTER_SDSS 10740 0.0013 0.0010 0.0010 0.0010 0.0010 KFILTER_SDSS 10810 0.0010 0.0008 0.0008 0.0008 0.0008 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