The Pan-STARRS1 data archive home page

PS1 dome
PS1 News
Papers describing the instrument, survey, and data analysis
PS1 Surveys, Chambers, K.C., et al.
PS1 Data Processing, Magnier, E. A., et al.
PS1 Pixel Processing, Waters, C. Z., et al.
PS1 Source Detection, Magnier, E. A., et al.
PS1 Calibration, Magnier, E. A., et al.
PS1 Database, Flewelling, H. A., et al.
PanSTARRS1 Quick Facts
LocationHaleakala, Hawaii
Telescope1.8 m diameter
Field of view3 degree diameter, 7 square degree FOV
Filtersg, r, i, z, y
Detectors60 orthogonal transfer arrays
Surveys

3pi Steradian Survey,

Medium Deep Survey

Sky coverageNorth of declination -30 degree
3pi stack
5σ depth
grizy < 23.3, 23.2, 23.1, 22.3, 21.3
Single epoch
5σ depth
grizy < 22.0, 21.8, 21.5, 20.9, 19.7
Saturation12-14 mag, depends on seeing
Median seeing grizy = 1.31, 1.19, 1.11, 1.07, 1.02 arcsec

Welcome to the starting point for access to data from the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS).  This page provides a brief summary of the facilities and data products to guide Pan-STARRS archive users.  More complete information is provided on linked pages (see below).

Pan-STARRS is a system for wide-field astronomical imaging developed and operated by the Institute for Astronomy at the University of Hawaii. Pan-STARRS1 (PS1) is the first part of Pan-STARRS to be completed and is the basis for Data Release 1 (DR1).  The PS1 survey used a 1.8 meter telescope and its 1.4 Gigapixel camera (GPC1; see PS1 GPC1 camera) to image the sky in five broadband  filters (g, r, i, z, y). The PS1 Science Consortium funded the operation of the Pan-STARRS1 telescope, situated at Haleakala Observatories near the summit of Haleakala in Hawaii, for the purposes of astronomical research. The PS1 consortium is made up of astronomers and engineers from 14 institutions from six countries.

The data from PS1 are archived at the Space Telescope Science Institute (STScI) in Baltimore Maryland, and can be accessed through MAST, the Mikulski Archive for Space Telescopes. Additional support for the PS1 public science archive is provided by the Gordon and Betty Moore Foundation.

The web site for Pan-STARRS1 in Hawaii also describes the project.

Quick links to the MAST PS1 Archive User Interface

Use the following links to jump right to the MAST PS1 Science Archive interfaces and get started using PS1 data!

Object Catalog Search: http://archive.stsci.edu/panstarrs/search.php
Image Cutout Server: http://ps1images.stsci.edu/cgi-bin/ps1cutouts
Casjobs SQL Server: http://mastweb.stsci.edu/ps1casjobs

Users of the current PS1 DR1 data should be aware of a few issues and inconsistencies in the data.
(1) 1.5% of the sky has missing data. That should be fixed soon.
(2) The stack positions (raStack, decStack) have considerably larger systematic astrometric errors than the mean epoch positions (raMean, decMean).
(3) The astrometric and photometric keywords in the image headers are slightly inconsistent with the astrometry and photometry for catalog objects. The catalog quantities are more accurate due to post-image-processing improvements.

See the PS1 DR1 caveats page for more details.

What data is available in DR1 and what data will be available in DR2?

The full data processing procedures and data products that result from them are described in PS1 data processing procedures.  

PS1 data products are served from an archive operated by the Space Telescope Science Institute (STScI), in Baltimore, Maryland.

  • The PS1 archive includes images and catalogs from several defined surveys, including observations of three quarters of the sky ("3PI Survey," which is available in DR1) carried out several times per filter and over a four-year time span.  In addition, there were nightly observations of ten smaller fields distributed across the sky (the "Medium Deep Survey," not part of DR1).
  • The PS1 archive includes a  simple image search form for retrieving image cutouts and full images and a catalog search form to search the catalogs for objects near a sky position. A CasJobs SQL interface allows expert users to craft more sophisticated queries.

The following  image and catalog products are available in DR1: 

  • Stack images are co-added images made from the multiple exposures taken over the survey.  Stacks provide the best signal-to-noise, and the source catalogs created from the stacks are recommended as a starting point for data analysis.
  • Mean values of the point-source and extended-object photometry from the  warp images are also available in DR1.

The following  image and  catalog products will be made available in DR2:

  • Warp images are the result of resampling and realigning the camera images into a skycell of the  PS1 Sky Tessellation, a set of common pixel-grid images with simple projections from the sky. Warps are astrometrically and photometrically calibrated.
  • Extracted photometry for point sources and extended objects from the  warp images will be made available in DR2. The DR2 source database will allow users to extract information on any time variation of source photometry.
  • All data from DR1 will be available in DR2 as well.

PS1 data release dates

  • PS1 DR1 occurred on December 19, 2016.
  • PS1 DR2 is scheduled for mid-May 2017

PS1 thumbnail sketch

Want a short, succinct summary of PS1, how it was executed and what kinds of data have been produced?  Check out the slide deck below.  It is now a few months old, and so details should come from these pages, but it presents a good summary of the project.

metcalfe_nam2015.pdf

How to use the PS1 documentation

You are on the home page of the web pages at STScI created to document and explain PS1 and its data products.  This first release of PS1 documentation is intentionally minimal in order to focus on the main issues a potential user of the PS1 dataset will face.  Details will be added as time permits and as questions arise from users.

These user information pages for PS1 are intended to be individually focused and broken down into a well-linked tree.  They approximate the structure of Wikipedia.

In particular, this structure makes it possible for users to search specifically within the domain of this documentation, reducing false positives significantly.  We welcome suggestions and comments that can improve our presentation. Contact archive@stsci.edu with suggestions.

PS1 user information topics

There are five primary informational topics, with links below, that provide further details:

How to get help

Credit where it is due

Here is the text for acknowledging PS1 in your publications:

The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen's University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation.

In addition, please cite the following papers describing the instrument, survey, and data analysis as appropriate:

  1. The Pan-STARRS1 Surveys, Chambers, K.C., et al.
  2. Pan-STARRS Data Processing System, Magnier, E. A., et al.
  3. Pan-STARRS Pixel Processing: Detrending, Warping, Stacking, Waters, C. Z., et al.
  4. Pan-STARRS Pixel Analysis: Source Detection and Characterization, Magnier, E. A., et al.
  5. Pan-STARRS Photometric and Astrometric Calibration, Magnier, E. A., et al.
  6. The Pan-STARRS1 Database and Data Products, Flewelling, H. A., et al.

People and organizations that built and supported PS1

Fourteen organizations in six nations (plus two funding organizations) supported the Pan-STARRS1 survey.

Many individuals contributed to the creation of the Pan-STARRS survey and archive.

2017 January 3