/*
**
**  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
   54973.559102       0.000272       23.44692        0.75965        1.00000     0
   54973.559646       0.000272       23.84311        0.75694        1.00000     0
   54973.560205       0.000286       22.35093        0.72226        1.00000     0
   54973.560760       0.000269       23.82370        0.76659        1.00000     0
   54973.561293       0.000263       24.32259        0.77989        1.00000     0
   54973.561837       0.000281       23.05328        0.73771        1.00000     0
   54973.562395       0.000278       23.14352        0.73817        1.00000     0
   54973.562951       0.000278       22.88510        0.74223        1.00000     0
   54973.563521       0.000292       21.74150        0.70287        1.00000     0
   54973.564114       0.000301       21.42076        0.68439        1.00000     0
   54973.564690       0.000275       23.34784        0.74567        1.00000     0
   54973.565251       0.000286       22.30990        0.71726        1.00000     0
   54973.565833       0.000295       21.79078        0.69794        1.00000     0
   54973.566408       0.000281       22.66320        0.73013        1.00000     0
   54973.566961       0.000272       23.44431        0.75512        1.00000     0
   54973.567528       0.000295       21.64952        0.70046        1.00000     0
   54973.568098       0.000275       23.40915        0.74770        1.00000     0
   54973.568654       0.000281       22.50951        0.73138        1.00000     0
   54973.569227       0.000292       21.91060        0.70783        1.00000     0
   54973.569956       0.000437       23.87641        0.60085        1.00000     0