Measurement of $t\bar{t}$ cross section in the lepton+jets channel at $\sqrt{s} =$ 13 TeV with the ATLAS detector

Luminosity data collected in 2016 was analyzed for both the Beams Condition Monitor, BCM, and the LUminosity Cherenkov Integrating Detector, LUCID. The discrepancy between luminosity values of the two apparatuses was determined to be both visible interaction rate, $\mu$, and Bunch Crossing IDentification, BCID, dependent. Scale factors to make BCM in better agreement with LUCID were determined for this data. Data collected in 2015 in $\sqrt{s} = 13$ TeV with $3.2$ fb$^{-1}$ was used to analyze the 8 TeV and 13 TeV transfer functions available for use in the KLFitter tool. After comparing resultant kinematic variable distributions and resolutions, it was determined the 13 TeV transfer functions should be used for $\sqrt{s} = 13$ TeV data analyses.