/*
**
**  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
   55951.404583       0.000324        9.65274        0.71188        1.00000     0        3.59527        0.25359        3.48346        0.25462        0.11181        0.02282
   55951.405356       0.000448        8.62057        0.62556        0.95484     0        2.73428        0.19238        2.66730        0.19300        0.06698        0.01537
   55951.406282       0.000477        8.73840        0.63852        0.94545     0        2.56838        0.18161        2.49479        0.18229        0.07358        0.01569
   55951.407153       0.000394       10.18103        0.74274        0.96324     0        3.05853        0.21627        2.97488        0.21704        0.08364        0.01825
   55951.408018       0.000466        8.94511        0.65189        0.93789     0        2.66669        0.18809        2.59067        0.18879        0.07602        0.01621
   55951.408970       0.000486        8.47646        0.62344        0.93452     0        2.56478        0.18091        2.47172        0.18176        0.09305        0.01759
   55951.409948       0.000492        8.20967        0.60079        0.95294     0        2.47325        0.17489        2.39917        0.17557        0.07408        0.01545
   55951.410943       0.000503        7.81166        0.58593        0.96552     0        2.39685        0.16906        2.26951        0.17023        0.12734        0.01989
   55951.411962       0.000515        7.83899        0.57366        0.94944     0        2.37081        0.16764        2.29980        0.16829        0.07101        0.01481
   55951.412948       0.000472        8.34247        0.62270        0.96933     0        2.53587        0.17931        2.41698        0.18040        0.11888        0.01981
   55951.413984       0.000564        7.25287        0.52282        0.97436     0        2.19312        0.15207        2.11898        0.15273        0.07415        0.01427