/*
**
**  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
   54204.315941       0.000049       41.17543        2.40693        0.98585     0       35.74020        2.06691       35.53409        2.07716        0.20611        0.20611
   54204.382608       0.000049       42.55889        2.85779        0.98585     0       27.13386        1.80094       26.95376        1.80992        0.18011        0.18011
   54204.448690       0.000165       39.66426        1.26916        0.98997     0       35.89228        1.12882       35.46865        1.13492        0.42363        0.11749
   54204.449087       0.000231       41.14435        1.09274        0.99861     0       36.48552        0.95651       36.16328        0.96038        0.32224        0.08612
   54204.515447       0.000249       34.48862        1.12430        0.99199     0       23.50580        0.74295       23.03453        0.74971        0.47127        0.10048
   54204.515915       0.000220       36.64978        1.18119        1.00000     0       26.88632        0.84184       26.35732        0.84936        0.52900        0.11278
   54204.516410       0.000275       35.32141        1.04457        0.99541     0       25.65448        0.73721       25.15202        0.74377        0.50246        0.09854
   54204.581355       0.000185       37.18088        1.19511        0.99996     0       31.45910        0.99235       31.05511        0.99820        0.40399        0.10797
   54204.581731       0.000191       37.92392        1.20774        1.00000     0       30.50471        0.96224       30.30885        0.96508        0.19587        0.07403
   54204.582122       0.000200       35.91308        1.15413        1.00000     0       29.49779        0.92543       29.01603        0.93237        0.48176        0.11355
   54204.582510       0.000188       38.46967        1.23284        1.00000     0       31.15894        0.97996       30.76118        0.98571        0.39776        0.10631
   54204.582996       0.000298       39.10590        0.99145        0.99897     0       31.57968        0.78412       31.13098        0.78924        0.44870        0.08974