# 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): r # # 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 5230 0.0000 0.0000 0.0000 0.0000 0.0000 KFILTER_SDSS 5280 0.0019 0.0013 0.0013 0.0012 0.0012 KFILTER_SDSS 5330 0.0016 0.0011 0.0011 0.0010 0.0010 KFILTER_SDSS 5380 0.0020 0.0014 0.0013 0.0013 0.0012 KFILTER_SDSS 5430 0.0359 0.0246 0.0238 0.0229 0.0221 KFILTER_SDSS 5480 0.1300 0.0894 0.0863 0.0833 0.0804 KFILTER_SDSS 5530 0.2580 0.1775 0.1714 0.1655 0.1599 KFILTER_SDSS 5580 0.3842 0.2644 0.2554 0.2467 0.2383 KFILTER_SDSS 5630 0.4893 0.3368 0.3254 0.3144 0.3038 KFILTER_SDSS 5680 0.5624 0.3873 0.3743 0.3617 0.3495 KFILTER_SDSS 5730 0.6084 0.4193 0.4053 0.3918 0.3787 KFILTER_SDSS 5780 0.6359 0.4386 0.4242 0.4102 0.3967 KFILTER_SDSS 5830 0.6514 0.4501 0.4355 0.4214 0.4078 KFILTER_SDSS 5880 0.6607 0.4575 0.4431 0.4291 0.4155 KFILTER_SDSS 5930 0.6673 0.4635 0.4493 0.4356 0.4223 KFILTER_SDSS 5980 0.6733 0.4694 0.4557 0.4423 0.4294 KFILTER_SDSS 6030 0.6767 0.4739 0.4607 0.4480 0.4355 KFILTER_SDSS 6080 0.6758 0.4755 0.4631 0.4510 0.4392 KFILTER_SDSS 6130 0.6748 0.4767 0.4649 0.4535 0.4423 KFILTER_SDSS 6180 0.6780 0.4802 0.4690 0.4579 0.4472 KFILTER_SDSS 6230 0.6840 0.4853 0.4744 0.4636 0.4531 KFILTER_SDSS 6280 0.6902 0.4902 0.4795 0.4690 0.4587 KFILTER_SDSS 6330 0.6945 0.4937 0.4832 0.4729 0.4629 KFILTER_SDSS 6380 0.6958 0.4949 0.4847 0.4746 0.4648 KFILTER_SDSS 6430 0.6942 0.4940 0.4840 0.4743 0.4647 KFILTER_SDSS 6480 0.6909 0.4919 0.4823 0.4728 0.4636 KFILTER_SDSS 6530 0.6895 0.4913 0.4820 0.4729 0.4640 KFILTER_SDSS 6580 0.6882 0.4903 0.4813 0.4724 0.4637 KFILTER_SDSS 6630 0.6580 0.4673 0.4585 0.4498 0.4413 KFILTER_SDSS 6680 0.5645 0.3989 0.3909 0.3831 0.3754 KFILTER_SDSS 6730 0.4170 0.2947 0.2890 0.2834 0.2779 KFILTER_SDSS 6780 0.2432 0.1739 0.1712 0.1685 0.1659 KFILTER_SDSS 6830 0.1000 0.0702 0.0687 0.0673 0.0659 KFILTER_SDSS 6880 0.0332 0.0221 0.0213 0.0205 0.0198 KFILTER_SDSS 6930 0.0152 0.0104 0.0101 0.0098 0.0095 KFILTER_SDSS 6980 0.0081 0.0058 0.0057 0.0056 0.0055 KFILTER_SDSS 7030 0.0040 0.0028 0.0028 0.0028 0.0027 KFILTER_SDSS 7080 0.0022 0.0016 0.0016 0.0016 0.0016 KFILTER_SDSS 7130 0.0015 0.0010 0.0010 0.0010 0.0010 KFILTER_SDSS 7180 0.0007 0.0004 0.0004 0.0004 0.0004 KFILTER_SDSS 7230 0.0000 0.0000 0.0000 0.0000 0.0000