/*
**
**  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
   55273.950297       0.000292       21.93898        0.69658        1.00000     0
   55273.950873       0.000284       22.61259        0.72016        1.00000     0
   55273.951434       0.000278       23.35353        0.74914        1.00000     0
   55273.951990       0.000278       23.65169        0.75236        1.00000     0
   55273.952557       0.000289       22.52844        0.71980        1.00000     0
   55273.953147       0.000301       21.80549        0.69275        1.00000     0
   55273.953729       0.000281       23.22420        0.73945        1.00000     0
   55273.954302       0.000292       22.20250        0.70931        1.00000     0
   55273.955051       0.000457       23.13983        0.58220        0.99858     0