# 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 Average over columns 1-6 # # 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 0.0008 0.0006 0.0006 0.0005 0.0005 KFILTER_SDSS 8010 0.0027 0.0019 0.0019 0.0019 0.0018 KFILTER_SDSS 8080 0.0084 0.0056 0.0056 0.0055 0.0055 KFILTER_SDSS 8150 0.0211 0.0133 0.0129 0.0126 0.0122 KFILTER_SDSS 8220 0.0416 0.0255 0.0246 0.0237 0.0228 KFILTER_SDSS 8290 0.0647 0.0410 0.0399 0.0388 0.0377 KFILTER_SDSS 8360 0.0847 0.0568 0.0561 0.0554 0.0547 KFILTER_SDSS 8430 0.0985 0.0663 0.0654 0.0645 0.0637 KFILTER_SDSS 8500 0.1072 0.0727 0.0718 0.0708 0.0699 KFILTER_SDSS 8570 0.1116 0.0765 0.0756 0.0746 0.0737 KFILTER_SDSS 8640 0.1126 0.0780 0.0770 0.0761 0.0752 KFILTER_SDSS 8710 0.1105 0.0772 0.0763 0.0753 0.0743 KFILTER_SDSS 8780 0.1057 0.0745 0.0735 0.0726 0.0716 KFILTER_SDSS 8850 0.0988 0.0706 0.0697 0.0688 0.0679 KFILTER_SDSS 8920 0.0911 0.0649 0.0638 0.0627 0.0617 KFILTER_SDSS 8990 0.0833 0.0547 0.0523 0.0500 0.0478 KFILTER_SDSS 9060 0.0761 0.0527 0.0510 0.0494 0.0479 KFILTER_SDSS 9130 0.0702 0.0488 0.0471 0.0456 0.0440 KFILTER_SDSS 9200 0.0658 0.0481 0.0471 0.0461 0.0452 KFILTER_SDSS 9270 0.0618 0.0425 0.0408 0.0391 0.0375 KFILTER_SDSS 9340 0.0573 0.0302 0.0266 0.0235 0.0208 KFILTER_SDSS 9410 0.0527 0.0306 0.0278 0.0252 0.0229 KFILTER_SDSS 9480 0.0485 0.0275 0.0247 0.0222 0.0200 KFILTER_SDSS 9550 0.0447 0.0263 0.0238 0.0216 0.0196 KFILTER_SDSS 9620 0.0409 0.0273 0.0257 0.0241 0.0227 KFILTER_SDSS 9690 0.0365 0.0279 0.0272 0.0266 0.0260 KFILTER_SDSS 9760 0.0319 0.0237 0.0229 0.0221 0.0214 KFILTER_SDSS 9830 0.0272 0.0215 0.0212 0.0209 0.0206 KFILTER_SDSS 9900 0.0228 0.0184 0.0182 0.0180 0.0178 KFILTER_SDSS 9970 0.0188 0.0152 0.0150 0.0148 0.0147 KFILTER_SDSS 10040 0.0152 0.0123 0.0121 0.0120 0.0118 KFILTER_SDSS 10110 0.0120 0.0097 0.0095 0.0094 0.0093 KFILTER_SDSS 10180 0.0092 0.0074 0.0073 0.0072 0.0071 KFILTER_SDSS 10250 0.0070 0.0056 0.0055 0.0055 0.0054 KFILTER_SDSS 10320 0.0052 0.0042 0.0042 0.0041 0.0040 KFILTER_SDSS 10390 0.0039 0.0032 0.0031 0.0031 0.0030 KFILTER_SDSS 10460 0.0030 0.0024 0.0024 0.0024 0.0023 KFILTER_SDSS 10530 0.0024 0.0019 0.0019 0.0019 0.0019 KFILTER_SDSS 10600 0.0019 0.0016 0.0016 0.0015 0.0015 KFILTER_SDSS 10670 0.0016 0.0013 0.0013 0.0013 0.0012 KFILTER_SDSS 10740 0.0012 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 0.0003 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