# 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 3 # # 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 0.0075 0.0050 0.0050 0.0049 0.0049 KFILTER_SDSS 8150 0.0181 0.0114 0.0111 0.0108 0.0105 KFILTER_SDSS 8220 0.0340 0.0209 0.0201 0.0194 0.0187 KFILTER_SDSS 8290 0.0507 0.0321 0.0312 0.0304 0.0295 KFILTER_SDSS 8360 0.0647 0.0434 0.0429 0.0423 0.0418 KFILTER_SDSS 8430 0.0749 0.0504 0.0497 0.0490 0.0484 KFILTER_SDSS 8500 0.0819 0.0556 0.0548 0.0541 0.0534 KFILTER_SDSS 8570 0.0875 0.0600 0.0592 0.0585 0.0578 KFILTER_SDSS 8640 0.0915 0.0634 0.0626 0.0618 0.0611 KFILTER_SDSS 8710 0.0925 0.0646 0.0638 0.0630 0.0622 KFILTER_SDSS 8780 0.0899 0.0634 0.0626 0.0617 0.0609 KFILTER_SDSS 8850 0.0842 0.0602 0.0594 0.0586 0.0579 KFILTER_SDSS 8920 0.0766 0.0546 0.0537 0.0528 0.0519 KFILTER_SDSS 8990 0.0686 0.0451 0.0431 0.0412 0.0394 KFILTER_SDSS 9060 0.0617 0.0427 0.0414 0.0401 0.0388 KFILTER_SDSS 9130 0.0568 0.0395 0.0381 0.0369 0.0356 KFILTER_SDSS 9200 0.0539 0.0394 0.0386 0.0378 0.0370 KFILTER_SDSS 9270 0.0511 0.0352 0.0337 0.0323 0.0310 KFILTER_SDSS 9340 0.0476 0.0251 0.0221 0.0195 0.0172 KFILTER_SDSS 9410 0.0441 0.0256 0.0233 0.0211 0.0191 KFILTER_SDSS 9480 0.0409 0.0232 0.0208 0.0187 0.0168 KFILTER_SDSS 9550 0.0379 0.0223 0.0202 0.0183 0.0166 KFILTER_SDSS 9620 0.0349 0.0233 0.0219 0.0206 0.0194 KFILTER_SDSS 9690 0.0316 0.0241 0.0236 0.0230 0.0225 KFILTER_SDSS 9760 0.0280 0.0208 0.0201 0.0195 0.0188 KFILTER_SDSS 9830 0.0242 0.0192 0.0189 0.0186 0.0183 KFILTER_SDSS 9900 0.0204 0.0164 0.0162 0.0161 0.0159 KFILTER_SDSS 9970 0.0166 0.0134 0.0132 0.0131 0.0129 KFILTER_SDSS 10040 0.0132 0.0107 0.0105 0.0104 0.0103 KFILTER_SDSS 10110 0.0103 0.0083 0.0082 0.0081 0.0080 KFILTER_SDSS 10180 0.0080 0.0065 0.0064 0.0063 0.0062 KFILTER_SDSS 10250 0.0061 0.0049 0.0049 0.0048 0.0047 KFILTER_SDSS 10320 0.0046 0.0038 0.0037 0.0037 0.0036 KFILTER_SDSS 10390 0.0036 0.0029 0.0029 0.0028 0.0028 KFILTER_SDSS 10460 0.0028 0.0023 0.0022 0.0022 0.0022 KFILTER_SDSS 10530 0.0022 0.0018 0.0018 0.0018 0.0017 KFILTER_SDSS 10600 0.0018 0.0015 0.0015 0.0015 0.0014 KFILTER_SDSS 10670 0.0015 0.0012 0.0012 0.0012 0.0012 KFILTER_SDSS 10740 0.0012 0.0010 0.0009 0.0009 0.0009 KFILTER_SDSS 10810 0.0009 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 0.0004 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