/*
**
**  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
   56748.255471       0.000203       32.49165        1.01568        1.00000     0       29.62064        0.92071       29.50311        0.92221        0.11752        0.05256
   56748.255879       0.000205       30.54616        0.97623        1.00000     0       28.27232        0.89316       28.04058        0.89616        0.23173        0.07328
   56748.256279       0.000194       32.98906        1.05454        1.00000     0       30.28912        0.95166       29.92077        0.95640        0.36835        0.09511
   56748.256666       0.000194       32.33096        1.03330        1.00000     0       29.96022        0.94648       29.71465        0.94966        0.24557        0.07766
   56748.257060       0.000200       32.15439        1.03075        1.00000     0       29.38214        0.92362       28.97678        0.92884        0.40537        0.09832
   56748.257453       0.000194       32.56720        1.03755        1.00000     0       30.34892        0.95260       30.02968        0.95671        0.31924        0.08854
   56748.257850       0.000203       30.97028        0.99210        1.00000     0       28.93378        0.90998       28.55771        0.91482        0.37607        0.09402
   56748.258238       0.000185       34.33982        1.09462        1.00000     0       31.67762        0.99578       31.36913        0.99975        0.30850        0.08906
   56748.258727       0.000304       32.20941        0.83380        0.99055     0       29.97069        0.75979       29.52775        0.76438        0.44294        0.08371