/*
**
**  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
   55272.946912       0.000347       33.18623        2.52229        0.94167     0        3.54572        0.25072        3.44353        0.25144        0.10219        0.01898
   55272.947589       0.000330       29.62452        2.20017        0.95614     0        3.69422        0.26057        3.55540        0.26154        0.13882        0.02252
   55272.948203       0.000284       31.21275        2.25222        0.97959     0        4.21534        0.29659        4.11994        0.29726        0.09540        0.01989
   55272.948770       0.000284       30.43126        2.23075        0.95918     0        4.28372        0.30215        4.13969        0.30316        0.14403        0.02470
   55272.949360       0.000301       28.13317        2.02780        0.98077     0        3.94774        0.27845        3.87357        0.27897        0.07417        0.01702
   55272.949930       0.000263       33.36709        2.43598        0.97802     0        4.52438        0.31913        4.38568        0.32010        0.13870        0.02491
   55272.950480       0.000286       31.34099        2.33312        0.94949     0        4.26241        0.30140        4.06754        0.30276        0.19486        0.02873
   55272.951065       0.000298       30.60498        2.24441        0.97087     0        4.02670        0.28402        3.88733        0.28500        0.13937        0.02356
   55272.951606       0.000243       37.21458        2.68333        0.97619     0        4.91061        0.34637        4.81348        0.34705        0.09712        0.02172
   55272.952303       0.000454       30.55855        1.81558        0.96504     0        3.97990        0.22940        3.87215        0.23001        0.10775        0.01683