Update README.md

Author: fdannemanndugick

README.md

@@ -32,7 +32,7 @@ Recorded lectures are hosted on the IRIS website [here](https://www.iris.edu/hq/
 9/1 (T) Inversion, gridding (and/or tomography) — Suzan van der Lee, Northwestern U.
 
 ## Authorship
-Individual unit lectures and data exercises are produced by the respective instructor.  This GitHub repository is maintained by Fransiska Dannemann Dugick.
+Individual unit lectures and data exercises are produced by the respective instructor.  This GitHub repository is maintained by Fransiska Dannemann Dugick with assistance from the ROSES2020 instructor team.
 
 ## Installation
 A `.yml` file is provided in order to create a Python environment using conda for running data exercises.  This environment can be created by running: