/*
**
**  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
   57491.874901       0.000324       19.67219        0.63568        1.00000     0       17.86901        0.56535       17.61060        0.56903        0.25841        0.06460
   57491.875564       0.000339       19.04095        0.60951        1.00000     0       17.24236        0.54335       17.05683        0.54599        0.18553        0.05356
   57491.876232       0.000330       19.49523        0.62259        1.00000     0       17.73125        0.55821       17.55671        0.56068        0.17454        0.05263
   57491.876895       0.000333       19.35221        0.61494        1.00000     0       17.52481        0.55253       17.43043        0.55387        0.09438        0.03853
   57491.877548       0.000321       19.67276        0.63819        1.00000     0       18.02999        0.57044       17.72036        0.57485        0.30963        0.07103
   57491.878188       0.000318       19.81591        0.64453        1.00000     0       18.19390        0.57563       17.84857        0.58054        0.34533        0.07536
   57491.878830       0.000324       19.55244        0.63177        1.00000     0       17.86901        0.56535       17.61060        0.56903        0.25841        0.06460
   57491.879481       0.000327       19.70674        0.62920        1.00000     0       17.94135        0.56398       17.74925        0.56670        0.19210        0.05545
   57491.880135       0.000327       19.57923        0.63007        1.00000     0       17.76406        0.56119       17.53995        0.56438        0.22411        0.05990
   57491.880778       0.000315       20.15009        0.64955        1.00000     0       18.39758        0.58149       18.14865        0.58503        0.24893        0.06427
   57491.881417       0.000324       19.65704        0.63501        1.00000     0       18.01211        0.56761       17.70524        0.57196        0.30687        0.07040
   57491.882048       0.000307       21.09913        0.67355        1.00000     0       19.08836        0.60063       18.90064        0.60329        0.18772        0.05660
   57491.882687       0.000333       19.17292        0.61628        1.00000     0       17.48996        0.55198       17.26975        0.55511        0.22021        0.05885
   57491.883532       0.000512       21.05026        0.52104        0.99647     0       19.18435        0.46680       18.95871        0.46927        0.22563        0.04810
   57491.943362       0.000301       20.81771        0.66497        0.99639     0       19.41002        0.61257       19.24607        0.61476        0.16394        0.05184
   57491.943981       0.000318       19.71781        0.63122        1.00000     0       18.24854        0.57649       18.07865        0.57876        0.16989        0.05122
   57491.944606       0.000307       20.31984        0.64919        1.00000     0       18.88046        0.59735       18.75225        0.59907        0.12822        0.04533
   57491.945222       0.000310       20.20766        0.64788        1.00000     0       18.79762        0.59325       18.59122        0.59600        0.20640        0.05725
   57491.946009       0.000477       19.97589        0.51727        1.00000     0       18.68563        0.47631       18.47971        0.47853        0.20592        0.04605