Not that I know of but you can create a role that allows users to send jobs to the background and emails the user when the job completes. This obviates the need to stay logged in.
You could create reports for each panel in the dashboard, enabling embedding
for each of the reports, then nab all the iframe
code from the UI and stitch it all together in an unauthenticated dashboard.
Seems weird to me that this is the easiest way to accomplish this...