remove reference to igor and typos fixes

1 files changed, 2 insertions, 2 deletions

diff --git a/two-photon-interference.tex b/two-photon-interference.tex
index 490fbd3..7b15de3 100644
--- a/two-photon-interference.tex
+++ b/two-photon-interference.tex
@@ -214,9 +214,9 @@ Eq.~\ref{2slit_wDif}. Estimate the uncertainty in these parameters due to laser
 your measured values are within experimental uncertainty from the manufacturer's specs: the center-to-center
 slit separation is 0.353 mm (or 0.406 or 0.457 mm, depending on what two-slit mask you have installed).
 
-Use Igor to fit your data with Eqs.~(\ref{1slit}) and (\ref{2slit_wDif}). You will need to add these functions using ``Add new function'' option. Note that in this case you will have to provide a list of initial guesses for all the fitting parameters. A few tips:
+Fit your data with Eqs.~(\ref{1slit}) and (\ref{2slit_wDif}). You will need to add these functions using ``Add new function'' option. Note that in this case you will have to provide a list of initial guesses for all the fitting parameters. A few tips:
 \begin{itemize}
-\item Make sure that units of all your measured values are self-consistent - the program will go crazy trying to combine measurements in meters and and micrometers together!
+\item Make sure that units of all your measured values are self-consistent - the program will go crazy trying to combine measurements in meters and micrometers together!
 \item Try to plot your function for guesstimated values before doing a fit with it. This catches many silly errors.
 \item You will have to fit for a term to account for the overall normalization and also for the fact that the maximum is not set at $x=0$. In other words, substitute $x \rightarrow x-x_0$. Estimate both of these (for the normalization, look at what happens when $x-x_0 = 0$) but include them as free parameters in the fit.
 \item You need to add a parameter to account for the non-zero background you observed when the laser was off.