/*
**
**  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
   56278.494801       0.000194        6.88969        0.50568        0.98507     0        6.07070        0.42926        5.89424        0.43255        0.17646        0.05321
   56278.495220       0.000226        6.03305        0.43732        1.00000     0        5.18811        0.36503        5.06595        0.36730        0.12217        0.04072
   56278.495657       0.000211        6.28607        0.45733        1.00000     0        5.54346        0.39004        5.39842        0.39272        0.14504        0.04587
   56278.496082       0.000214        6.36635        0.46129        0.98649     0        5.51602        0.38907        5.39999        0.39123        0.11603        0.04102
   56278.496528       0.000231        6.12829        0.43652        0.97500     0        5.26516        0.36774        5.18372        0.36924        0.08144        0.03325
   56278.496959       0.000200        6.87925        0.49495        0.97101     0        6.00999        0.42391        5.91518        0.42568        0.09482        0.03871
   56278.497382       0.000223        6.10723        0.44104        0.98701     0        5.29828        0.37371        5.20076        0.37553        0.09752        0.03686
   56278.497784       0.000179        7.64745        0.55168        0.96774     0        6.67777        0.47219        6.57189        0.47416        0.10588        0.04322
   56278.498186       0.000223        6.03103        0.43810        1.00000     0        5.20346        0.36794        5.09345        0.36999        0.11000        0.03889
   56278.498626       0.000217        6.21876        0.45055        0.98667     0        5.44148        0.38381        5.32702        0.38594        0.11446        0.04047
   56278.499184       0.000341        6.23066        0.35998        0.99341     0        5.36629        0.30284        5.26693        0.30432        0.09935        0.02996