/*
**
**  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)
**
**
**  Upper limits have an error listed as -1.00000.
**
*/
      BinCenter          BinHW           Rate      RateError        FracExp  Mode
   54938.982693       0.000203       30.64529        0.97611        1.00000     0
   54938.983101       0.000205       30.23018        0.95945        1.00000     0
   54938.983526       0.000220       28.05374        0.89560        1.00000     0
   54938.983949       0.000203       30.78782        0.97594        1.00000     0
   54938.984447       0.000295       30.79697        0.81297        0.99250     0
   54939.025899       0.000203       30.54541        0.97559        0.99433     0
   54939.026313       0.000211       29.02997        0.92807        1.00000     0
   54939.026753       0.000229       27.05910        0.86302        1.00000     0
   54939.027192       0.000211       29.16961        0.92963        1.00000     0
   54939.027626       0.000223       27.71290        0.87985        1.00000     0
   54939.028058       0.000208       29.56504        0.93851        1.00000     0
   54939.028483       0.000217       28.43278        0.90672        1.00000     0
   54939.028900       0.000200       30.50302        0.98531        1.00000     0
   54939.029487       0.000388       28.92609        0.68506        0.99770     0
   54939.092592       0.000223       27.96019        0.88960        0.99710     0
   54939.093046       0.000231       26.43514        0.84526        1.00000     0
   54939.093497       0.000220       28.03627        0.89423        1.00000     0
   54939.093946       0.000229       26.82744        0.86200        1.00000     0
   54939.094409       0.000234       26.25163        0.84040        1.00000     0
   54939.094852       0.000208       29.40754        0.94286        1.00000     0
   54939.095280       0.000220       27.74084        0.89077        1.00000     0
   54939.095728       0.000229       26.91896        0.85716        1.00000     0
   54939.096174       0.000217       28.38983        0.90403        1.00000     0
   54939.096625       0.000234       26.51765        0.84014        1.00000     0
   54939.097083       0.000223       27.58388        0.87830        1.00000     0
   54939.097528       0.000223       27.42002        0.88334        1.00000     0
   54939.097971       0.000220       28.01628        0.89214        1.00000     0
   54939.098411       0.000220       27.76224        0.89051        1.00000     0
   54939.098940       0.000310       26.55520        0.73528        1.00000     0