/*
**
**  Swift/XRT light curve for Mrk 421.
**
**  Data taken from the automatic processing at http://www.swift.psu.edu/monitoring/
**
**  When using these data and results in publications, please reference M.C. Stroh & A.D. Falcone 2013, ApJS, 207, 28; arXiv: 1305.4949.
**
**  Key:
**
**   BinCenter                - Center of time bin (MJD)
**   BinHW                    - One-half of the full time bin size (days)
**   Rate                     - The background subtracted, PSF corrected and pile-up corrected source count rate (cts/s).
**   RateError                - 1 sigma error in source count rate (cts/s)
**   FracExp                  - Conversion factor between bin size and observing time
**   Mode                     - 0 if in Windowed Timing (WT)
**                              1 if in Photon Counting (PC)
**   RawRate                  - Raw source count rate (cts/s)
**   RawError                 - 1 sigma error in the raw count rate (cts/s)
**   NetRate                  - Background subtracted count rate (cts/s)
**   NetError                 - 1 sigma error in the background subtracted count rate (cts/s)
**   BackRate                 - Background count rate (cts/s)
**   BackError                - 1 sigma error in the background count rate (cts/s)
**
**
**  Upper limits have an error listed as -1.00000.
**
*/
      BinCenter          BinHW           Rate      RateError        FracExp  Mode        RawRate       RawError        NetRate       NetError       BackRate      BackError
   55947.132171       0.000463       14.05002        0.44941        1.00000     0       12.52085        0.39594       12.41715        0.39718        0.10370        0.03127
   55947.133080       0.000446       14.57786        0.46779        1.00000     0       13.06071        0.41219       12.90400        0.41405        0.15671        0.03918
   55947.133980       0.000454       14.20186        0.45712        1.00000     0       12.78562        0.40391       12.61269        0.40596        0.17293        0.04076
   55947.134874       0.000440       14.70964        0.47345        1.00000     0       13.20620        0.41720       13.02758        0.41932        0.17862        0.04210
   55947.135748       0.000434       14.90962        0.48169        0.99333     0       13.43176        0.42496       13.22930        0.42737        0.20246        0.04527
   55947.136598       0.000417       15.49761        0.50065        1.00000     0       13.92597        0.44016       13.70600        0.44277        0.21997        0.04800
   55947.137487       0.000472       13.54271        0.44117        1.00000     0       12.27811        0.38846       12.01901        0.39154        0.25910        0.04897
   55947.138415       0.000457       14.16145        0.45724        1.00000     0       12.67934        0.40096       12.48841        0.40322        0.19093        0.04269
   55947.139298       0.000425       15.23440        0.49186        1.00000     0       13.62813        0.43096       13.42292        0.43340        0.20522        0.04589
   55947.140175       0.000451       14.41466        0.46203        1.00000     0       12.84190        0.40610       12.71620        0.40759        0.12570        0.03486
   55947.141066       0.000440       14.84729        0.47793        1.00000     0       13.25892        0.41803       13.06045        0.42038        0.19847        0.04438
   55947.142270       0.000764       15.72862        0.37054        1.00000     0       14.03094        0.32630       13.89953        0.32745        0.13141        0.02740