Title: A recalibration of optical photometry: Tycho-2, Stromgren, and
       aJohnson systems 
Author: Maiz Apellaniz J.
Table: Recommended photon-counting sensitivity curves for the 
       Johnson UBV standard system
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Byte-by-byte Description of file: datafile3.txt
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   Bytes Format Units Label  Explanations
--------------------------------------------------------------------------------
   1-  4 I4     0.1nm UWave  ? Johnson U filter wavelength in Angstroms
   6- 10 F5.3   ---   U-P    ? Johnson U filter sensitivity
  12- 15 I4     0.1nm BWave  ? Johnson B filter wavelength in Angstroms
  17- 21 F5.3   ---   B-P    ? Johnson B filter sensitivity
  23- 26 I4     0.1nm VWave  Johnson V filter wavelength in Angstroms
  28- 32 F5.3   ---   V-P    Johnson V filter sensitivity
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3050 0.000 3600 0.000 4700 0.000 
3100 0.237 3650 0.011 4750 0.004 
3150 0.403 3700 0.033 4800 0.032 
3200 0.489 3750 0.058 4850 0.084 
3250 0.504 3800 0.144 4900 0.172 
3300 0.508 3850 0.348 4950 0.310 
3350 0.511 3900 0.601 5000 0.478 
3400 0.513 3950 0.817 5050 0.650 
3450 0.516 4000 0.958 5100 0.802 
3500 0.528 4050 1.000 5150 0.913 
3550 0.603 4100 0.995 5200 0.978 
3600 0.741 4150 0.995 5250 1.000 
3650 0.889 4200 0.994 5300 0.994 
3700 0.985 4250 0.976 5350 0.977 
3750 1.000 4300 0.950 5400 0.950 
3800 0.965 4350 0.921 5450 0.911 
3850 0.841 4400 0.888 5500 0.862 
3900 0.648 4450 0.845 5550 0.806 
3950 0.424 4500 0.792 5600 0.747 
4000 0.231 4550 0.733 5650 0.690 
4050 0.109 4600 0.673 5700 0.634 
4100 0.035 4650 0.619 5750 0.579 
4150 0.000 4700 0.569 5800 0.523 
           4750 0.519 5850 0.467 
           4800 0.467 5900 0.413 
           4850 0.414 5950 0.363 
           4900 0.362 6000 0.317 
           4950 0.315 6050 0.274 
           5000 0.272 6100 0.234 
           5050 0.232 6150 0.200 
           5100 0.193 6200 0.168 
           5150 0.155 6250 0.140 
           5200 0.121 6300 0.114 
           5250 0.096 6350 0.089 
           5300 0.075 6400 0.067 
           5350 0.054 6450 0.050 
           5400 0.034 6500 0.037 
           5450 0.018 6550 0.027 
           5500 0.007 6600 0.020 
           5550 0.001 6650 0.016 
           5600 0.000 6700 0.013 
                      6750 0.012 
                      6800 0.010 
                      6850 0.009 
                      6900 0.007 
                      6950 0.004 
                      7000 0.000 
