/*
**
**  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
   55851.895643       0.000642        5.63102        0.41020        0.83782     0        2.17570        0.15308        2.13656        0.15344        0.03914        0.01046
   55851.896780       0.000495        6.12770        0.44360        0.95906     0        2.44309        0.17275        2.39553        0.17319        0.04757        0.01228
   55851.897851       0.000576        5.43037        0.39418        0.95980     0        2.09773        0.14833        2.05145        0.14876        0.04629        0.01123
   55851.898976       0.000550        5.53829        0.39958        0.95263     0        2.21363        0.15653        2.17628        0.15687        0.03735        0.01036
   55851.899980       0.000454        6.97821        0.50060        0.96178     0        2.66669        0.18809        2.62881        0.18844        0.03788        0.01142
   55851.900926       0.000492        6.00889        0.43517        0.95882     0        2.45808        0.17381        2.40703        0.17428        0.05105        0.01276
   55851.901890       0.000472        6.25643        0.44987        0.95706     0        2.56838        0.18161        2.53171        0.18195        0.03667        0.01106
   55851.902793       0.000431        6.47653        0.47375        0.99329     0        2.72075        0.19191        2.63642        0.19268        0.08433        0.01721
   55851.903623       0.000399        6.92144        0.50067        0.98551     0        2.96081        0.20884        2.89581        0.20943        0.06501        0.01577
   55851.904537       0.000515        5.65874        0.40678        0.94382     0        2.38492        0.16864        2.35087        0.16895        0.03405        0.01027
   55851.905515       0.000463        6.33915        0.45325        0.95625     0        2.64493        0.18610        2.60754        0.18644        0.03739        0.01127
   55851.906792       0.000813        6.35691        0.33983        0.96797     0        2.68094        0.14052        2.63505        0.14083        0.04589        0.00937