The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.
To start a query for public PanSTARRS data go to the PS1 archive website at the Space Telescope Science Institute at http://panstarrs.stsci.edu/ and access with your username and password. To obtain a username and password please write a request to firstname.lastname@example.org.
Do you need a photometric catalog or light curves?
If you need to download a photometric catalog or a light curve from the PanSTARRS data archive please follow the instructions under photometric catalog queries.
Do you need images?
If you need to download images from the PanSTARRS data archive please follow the instructions under postage stamps.