/*
**
**  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
   55557.815269       0.000535       11.49487        0.37524        1.00000     0       10.82884        0.34244       10.59086        0.34573        0.23798        0.04760
   55557.816337       0.000532       11.64161        0.37530        1.00000     0       10.90947        0.34464       10.75633        0.34676        0.15313        0.03828
   55557.817385       0.000515       12.04436        0.38779        1.00000     0       11.27720        0.35626       11.12880        0.35832        0.14840        0.03832
   55557.818400       0.000501       12.39697        0.39975        1.00000     0       11.62629        0.36692       11.45324        0.36932        0.17305        0.04197
   55557.819028       0.000127        9.73216        0.70403        1.00000     0        9.15160        0.64550        8.99151        0.65045        0.16009        0.08005
   55557.819682       0.000527       11.72428        0.37904        1.00000     0       10.99633        0.34791       10.83184        0.35019        0.16449        0.03990
   55557.820741       0.000532       11.62615        0.37660        1.00000     0       10.94213        0.34516       10.74114        0.34793        0.20099        0.04386
   55557.821812       0.000538       11.39443        0.37299        1.00000     0       10.79216        0.34094       10.52706        0.34460        0.26510        0.05010
   55557.822853       0.000503       12.25491        0.39730        1.00000     0       11.52494        0.36427       11.32252        0.36707        0.20242        0.04526
   55557.823872       0.000515       11.98279        0.38906        1.00000     0       11.28846        0.35644       11.07080        0.35945        0.21766        0.04640
   55557.825374       0.000987       12.09084        0.28170        1.00000     0       11.36203        0.25836       11.17095        0.26026        0.19108        0.03141