Pan-STARRS Photometric and Astrometric Calibration
  We present the details of the photometric and astrometric calibration of the Pan-STARRS1 $3\pi$ Survey. The photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations onto a photometric system with consistent zero points over the entire area surveyed, the ~30,000 square degrees north of $\delta$ = -30 degrees. The astrometric calibration compensates for similar systematic effects so that positions, proper motions, and parallaxes are reliable as well. The Pan-STARRS Data Release 2 (DR2) astrometry is tied to the Gaia DR1 release. 
Eugene. A. Magnier (1), Edward. F. Schlafly (2,3), Douglas P.   Finkbeiner (4,5), J. L. Tonry (1), B. Goldman (6), S. R\"ose...
astro-ph.IM