/*
**
**  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
   54974.159791       0.000356       17.64534        0.56440        1.00000     0
   54974.160480       0.000333       18.72975        0.60215        1.00000     0
   54974.161154       0.000341       18.42809        0.59271        1.00000     0
   54974.161845       0.000350       17.83903        0.57117        1.00000     0
   54974.162563       0.000367       17.00883        0.54939        1.00000     0
   54974.163275       0.000344       18.01034        0.57750        1.00000     0
   54974.163966       0.000347       18.27624        0.58405        1.00000     0
   54974.164803       0.000489       17.55921        0.48123        0.99789     0
   54974.226669       0.000330       19.11741        0.60985        0.99471     0
   54974.227343       0.000344       18.17599        0.58236        1.00000     0
   54974.228040       0.000353       17.51659        0.56335        1.00000     0
   54974.228738       0.000344       18.08241        0.58266        1.00000     0
   54974.229432       0.000350       17.87533        0.57529        1.00000     0
   54974.230109       0.000327       18.94272        0.61191        1.00000     0
   54974.230789       0.000353       17.63631        0.56431        1.00000     0
   54974.231544       0.000402       17.72709        0.53164        1.00000     0