/*
**
**  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
   54950.955964       0.000237       26.66829        0.85503        1.00000     0
   54950.956453       0.000252       24.64671        0.78879        1.00000     0
   54950.956936       0.000231       27.47880        0.87823        1.00000     0
   54950.957411       0.000243       25.97173        0.82847        1.00000     0
   54950.957888       0.000234       26.55977        0.84395        1.00000     0
   54950.958366       0.000243       25.85604        0.82273        1.00000     0
   54950.958849       0.000240       26.19286        0.83555        1.00000     0
   54950.959332       0.000243       25.52857        0.81669        1.00000     0
   54950.959809       0.000234       26.46269        0.84652        1.00000     0
   54950.960295       0.000252       25.11357        0.80045        1.00000     0
   54950.960796       0.000249       24.94837        0.80078        1.00000     0
   54950.961297       0.000252       25.01320        0.79499        1.00000     0
   54950.961783       0.000234       26.74279        0.85383        1.00000     0
   54950.962260       0.000243       25.56907        0.82074        1.00000     0
   54950.962746       0.000243       25.68592        0.82364        1.00000     0
   54950.963232       0.000243       25.81930        0.82430        1.00000     0
   54950.963716       0.000240       26.13742        0.83516        1.00000     0
   54950.964193       0.000237       26.00119        0.83703        1.00000     0
   54950.964676       0.000246       25.55444        0.81244        1.00000     0
   54950.965171       0.000249       25.14607        0.79887        1.00000     0
   54950.965663       0.000243       25.82236        0.81912        1.00000     0
   54950.966140       0.000234       26.50833        0.84673        1.00000     0
   54950.966612       0.000237       26.26508        0.83768        1.00000     0
   54950.967104       0.000255       24.59003        0.78192        1.00000     0
   54950.967605       0.000246       25.17904        0.80513        1.00000     0
   54950.968094       0.000243       25.65760        0.82042        1.00000     0
   54950.968577       0.000240       25.77455        0.82981        1.00000     0
   54950.969118       0.000301       24.85249        0.72593        1.00000     0