A Statistical Analysis of the Accuracy of the Digitized Magnitudes of Photometric Plates on the Timescale of Decades with an Application to the Century-Long Light Curve of KIC 8462852

@article{Hippke2016ASA,
  title={A Statistical Analysis of the Accuracy of the Digitized Magnitudes of Photometric Plates on the Timescale of Decades with an Application to the Century-Long Light Curve of KIC 8462852},
  author={M. Hippke and D. Angerhausen and M. Lund and J. Pepper and K. Stassun},
  journal={The Astrophysical Journal},
  year={2016},
  volume={825},
  pages={73}
}
We present a statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the timescale of decades. In our examination of archival Johnson B photometry from the Harvard DASCH archive, we find a median rms scatter of light curves of the order of 0.15 mag over the range B ~ 9–17 for all calibrations. Slight underlying systematics (trends or flux discontinuities) are on a level of 0.2 mag per century (1889–1990) for the majority of constant stars. These historic data… Expand
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