/*
**
**  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
   55920.511446       0.000460       14.11312        0.46297        1.00000     0       12.63739        0.39903       12.32333        0.40415        0.31406        0.06411
   55920.512343       0.000437       14.83259        0.47886        1.00000     0       13.30692        0.42017       13.11402        0.42332        0.19291        0.05156
   55920.513234       0.000454       14.18847        0.46192        1.00000     0       12.82390        0.40452       12.55885        0.40884        0.26505        0.05927
   55920.514146       0.000457       14.08720        0.45966        1.00000     0       12.69202        0.40116       12.42864        0.40546        0.26337        0.05889
   55920.515037       0.000434       14.84669        0.47876        1.00000     0       13.34221        0.42213       13.17576        0.42485        0.16645        0.04805
   55920.515911       0.000440       14.76532        0.47515        1.00000     0       13.21938        0.41741       13.05512        0.42009        0.16426        0.04742
   55920.516793       0.000443       14.59810        0.47422        0.99346     0       13.21938        0.41741       12.97299        0.42143        0.24639        0.05808
   55920.517667       0.000431       15.10355        0.49194        0.99329     0       13.59019        0.42890       13.30903        0.43349        0.28117        0.06287
   55920.518529       0.000431       14.85414        0.48515        1.00000     0       13.43176        0.42496       13.15248        0.42953        0.27928        0.06245
   55920.519374       0.000414       15.56182        0.50474        1.00000     0       14.05137        0.44368       13.80402        0.44772        0.24735        0.05999
   55920.520222       0.000434       14.69127        0.48054        1.00000     0       13.34221        0.42213       13.05092        0.42689        0.29129        0.06356
   55920.521429       0.000773       14.48701        0.35799        0.99625     0       13.14218        0.31461       12.86841        0.31799        0.27377        0.04628