/*
**
**  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)
**
**
**  Upper limits have an error listed as -1.00000.
**
*/
      BinCenter          BinHW           Rate      RateError        FracExp  Mode
   54978.177791       0.000205       30.53667        0.97788        1.00000     0
   54978.178210       0.000214       28.92443        0.92613        1.00000     0
   54978.178638       0.000214       29.23645        0.93435        1.00000     0
   54978.179069       0.000217       28.79973        0.91507        1.00000     0
   54978.179501       0.000214       29.04321        0.92514        1.00000     0
   54978.179929       0.000214       29.27161        0.92805        1.00000     0
   54978.180351       0.000208       29.70566        0.94928        1.00000     0
   54978.180785       0.000226       27.54178        0.87948        1.00000     0
   54978.181237       0.000226       27.83308        0.88543        1.00000     0
   54978.181668       0.000205       30.40302        0.96349        1.00000     0
   54978.182096       0.000223       28.03541        0.89181        1.00000     0
   54978.182533       0.000214       29.07824        0.92639        1.00000     0
   54978.182964       0.000217       29.03428        0.91882        1.00000     0
   54978.183401       0.000220       28.32719        0.90024        1.00000     0
   54978.183821       0.000200       31.13227        0.99413        1.00000     0
   54978.184240       0.000220       28.25803        0.90913        1.00000     0
   54978.184668       0.000208       29.79906        0.95143        1.00000     0
   54978.185094       0.000217       28.99201        0.92077        1.00000     0
   54978.185528       0.000217       28.49341        0.91160        1.00000     0
   54978.185971       0.000226       27.60017        0.88102        1.00000     0
   54978.186405       0.000208       29.76635        0.95445        1.00000     0
   54978.186833       0.000220       28.70728        0.90783        1.00000     0
   54978.187267       0.000214       29.16423        0.92772        1.00000     0
   54978.187689       0.000208       29.68026        0.94957        1.00000     0
   54978.188120       0.000223       27.76822        0.89407        1.00000     0
   54978.188601       0.000258       27.97001        0.82982        1.00000     0