Pan-STARRS Photometric and Astrometric Calibration

Eugene. A. Magnier (1); Edward. F. Schlafly (2,3); Douglas P.; Finkbeiner (4,5); J. L. Tonry (1); B. Goldman (6); S. R\"oser (7); E.; Schilbach (7); K. C. Chambers (1); H. A. Flewelling (1); M. E. Huber (1); P.; A. Price (8); W. E. Sweeney (1); C. Z. Waters (1); L. Denneau (1); P. Draper; (9); K. W. Hodapp (1); R. Jedicke (1); R.-P. Kudritzki (1); N. Metcalfe (9),; C. W. Stubbs (10); R. J. Wainscoast (1) ((1) UH Institute for Astronomy; (2); Lawrence Berkeley National Laboratory; (3) Hubble Fellow; (4) ITC; Harvard-Smithsonian Center for Astrophysics; (5) Department of Physics; Harvard University; (6) Max Planck Institute for Astronomy; (7); Astronomisches Rechen-Institut Zentrum f\"ur Astronomie der Universit\"at; Heidelberg; (8) Department of Astrophysical Sciences Princeton University,; (9) Department of Physics Durham University; (10) Harvard-Smithsonian Center; for Astrophysics)

arXiv:1612.05242·astro-ph.IM·November 18, 2020

Pan-STARRS Photometric and Astrometric Calibration

Eugene. A. Magnier (1), Edward. F. Schlafly (2,3), Douglas P., Finkbeiner (4,5), J. L. Tonry (1), B. Goldman (6), S. R\"oser (7), E., Schilbach (7), K. C. Chambers (1), H. A. Flewelling (1), M. E. Huber (1), P., A. Price (8), W. E. Sweeney (1), C. Z. Waters (1), L. Denneau (1)

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TL;DR

This paper details the calibration procedures for the Pan-STARRS1 survey, ensuring consistent photometry and accurate astrometry across a large sky area, with data tied to Gaia DR1 for improved positional accuracy.

Contribution

It introduces comprehensive photometric and astrometric calibration methods for Pan-STARRS1, aligning observations to a uniform system and linking astrometry to Gaia DR1.

Findings

01

Achieved consistent zero points across 30,000 square degrees.

02

Improved positional accuracy by calibrating against Gaia DR1.

03

Reduced systematic effects in photometry and astrometry.

Abstract

We present the details of the photometric and astrometric calibration of the Pan-STARRS1 $3 π$ 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 $δ$ = -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.

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