/*
**
**  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)
**   RawRate                  - Raw source count rate (cts/s)
**   RawError                 - 1 sigma error in the raw count rate (cts/s)
**   NetRate                  - Background subtracted count rate (cts/s)
**   NetError                 - 1 sigma error in the background subtracted count rate (cts/s)
**   BackRate                 - Background count rate (cts/s)
**   BackError                - 1 sigma error in the background count rate (cts/s)
**
**
**  Upper limits have an error listed as -1.00000.
**
*/
      BinCenter          BinHW           Rate      RateError        FracExp  Mode        RawRate       RawError        NetRate       NetError       BackRate      BackError
   55945.398534       0.000370       16.86915        0.54522        1.00000     0       15.71365        0.49592       15.45842        0.49955        0.25523        0.06016
   55945.399249       0.000344       17.86384        0.57988        1.00000     0       16.88524        0.53316       16.56495        0.53772        0.32029        0.06989
   55945.399958       0.000365       16.90209        0.54546        1.00000     0       15.88357        0.50253       15.66750        0.50562        0.21607        0.05579
   55945.400673       0.000350       17.66659        0.56758        1.00000     0       16.55647        0.52356       16.37648        0.52613        0.18000        0.05196
   55945.401413       0.000391       15.74737        0.50996        1.00000     0       14.83951        0.46927       14.59751        0.47272        0.24200        0.05704
   55945.402177       0.000373       16.58783        0.53265        1.00000     0       15.54525        0.49134       15.37641        0.49375        0.16884        0.04874
   55945.402918       0.000367       16.87982        0.54060        1.00000     0       15.79005        0.49908       15.64714        0.50112        0.14291        0.04519
   55945.403668       0.000382       16.27468        0.52110        1.00000     0       15.23748        0.48089       15.08623        0.48305        0.15125        0.04560
   55945.404391       0.000341       18.25870        0.58326        1.00000     0       17.07927        0.53848       16.92546        0.54067        0.15381        0.04864
   55945.405149       0.000417       17.72623        0.52320        0.99888     0       16.67131        0.48186       16.43156        0.48499        0.23974        0.05500