/*
**
**  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
   54926.980620       0.000200       31.81051        1.00671        1.00000     0       29.58542        0.92681       29.36258        0.92924        0.22284        0.06719
   54926.981017       0.000197       31.94206        1.01832        1.00000     0       29.75535        0.93628       29.46757        0.93943        0.28779        0.07691
   54926.981413       0.000200       31.41560        1.00118        1.00000     0       29.23701        0.92134       28.99391        0.92401        0.24310        0.07018
   54926.981815       0.000203       31.05446        0.98639        1.00000     0       28.84796        0.90863       28.66824        0.91060        0.17972        0.05991
   54926.982215       0.000197       32.16541        1.02216        1.00000     0       29.72589        0.93581       29.52033        0.93807        0.20556        0.06500
   54926.982608       0.000197       32.80972        1.04839        1.00000     0       29.78481        0.93674       29.43536        0.94057        0.34946        0.08476
   54926.983005       0.000200       31.59446        1.00816        1.00000     0       29.06281        0.91859       28.86023        0.92082        0.20258        0.06406
   54926.983398       0.000194       32.54760        1.03329        1.00000     0       30.16956        0.94978       29.98179        0.95184        0.18777        0.06259
   54926.983792       0.000200       32.34234        1.02767        1.00000     0       29.35315        0.92316       29.13031        0.92561        0.22284        0.06719
   54926.984191       0.000200       31.34381        0.99767        1.00000     0       29.09184        0.91905       28.92978        0.92083        0.16207        0.05730
   54926.984587       0.000197       31.70390        1.01434        1.00000     0       29.54913        0.93303       29.26134        0.93619        0.28779        0.07691
   54926.985088       0.000304       32.52169        0.83106        0.99731     0       30.15012        0.75947       29.82976        0.76228        0.32036        0.06539