/*
**
**  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
   54973.759915       0.000362       22.25089        0.72401        1.00000     0
   54973.760629       0.000353       23.04440        0.74573        1.00000     0
   54973.761356       0.000373       22.78399        0.74339        1.00000     0
   54973.762085       0.000356       23.62890        0.76673        1.00000     0
   54973.762791       0.000350       24.16142        0.78372        1.00000     0
   54973.763523       0.000382       23.33575        0.73597        0.99380     0
   54973.784663       0.000301       20.63459        0.66280        0.99882     0
   54973.785265       0.000301       20.73810        0.66365        1.00000     0
   54973.785870       0.000304       20.68887        0.66200        1.00000     0
   54973.786468       0.000295       21.36992        0.68719        1.00000     0
   54973.787059       0.000295       21.33849        0.68647        1.00000     0
   54973.787643       0.000289       21.64744        0.69114        1.00000     0
   54973.788286       0.000353       19.10053        0.59174        0.99353     0
   54973.826868       0.000399       21.02627        0.68338        0.99564     0
   54973.827661       0.000394       23.00595        0.74830        1.00000     0
   54973.828702       0.000648       21.94556        0.57860        1.00000     0