/*
**
**  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
   55957.409485       0.000446       15.94156        0.51604        1.00000     0       13.03469        0.41178       12.82182        0.41483        0.21287        0.05018
   55957.410358       0.000428       16.09283        0.52139        1.00000     0       13.53605        0.42805       13.31455        0.43122        0.22150        0.05221
   55957.411218       0.000431       15.80855        0.51562        1.00000     0       13.47210        0.42560       13.17874        0.42979        0.29336        0.05988
   55957.412054       0.000405       16.91272        0.54472        1.00000     0       14.35247        0.45319       14.15734        0.45598        0.19514        0.05038
   55957.412882       0.000422       16.23922        0.52418        1.00000     0       13.70776        0.43369       13.52064        0.43638        0.18712        0.04831
   55957.413721       0.000417       16.56866        0.53502        1.00000     0       13.92597        0.44016       13.72361        0.44306        0.20236        0.05059
   55957.414569       0.000431       15.82380        0.51396        1.00000     0       13.47210        0.42560       13.21541        0.42927        0.25669        0.05601
   55957.415431       0.000431       15.91208        0.51224        1.00000     0       13.49899        0.42602       13.31564        0.42865        0.18335        0.04734
   55957.416258       0.000396       17.10874        0.55293        1.00000     0       14.60827        0.46219       14.39557        0.46523        0.21270        0.05318
   55957.417048       0.000394       17.48376        0.56106        1.00000     0       14.80406        0.46698       14.62997        0.46947        0.17409        0.04828
   55957.417896       0.000454       15.03196        0.48525        1.00000     0       12.81114        0.40432       12.61394        0.40714        0.19721        0.04783
   55957.418802       0.000451       15.03391        0.48718        1.00000     0       12.89327        0.40691       12.65977        0.41024        0.23350        0.05221
   55957.419667       0.000414       16.50196        0.53675        0.99301     0       14.20676        0.44769       13.89894        0.45208        0.30782        0.06283
   55957.420483       0.000402       16.77701        0.54582        1.00000     0       14.39808        0.45554       14.12292        0.45948        0.27515        0.06004
   55957.421554       0.000668       15.62558        0.40919        1.00000     0       13.45097        0.34154       13.16714        0.34481        0.28383        0.04731