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VIII. Post-Cryo Data Release

1. Introduction

c. How to Access the Post-Cryo Data Products


  1. Online Access
    1. Single-exposure Working Database and Other Tables
    2. Images
  2. Application Programming Interface
  3. Electronic Access to the Full Source Database

WISE science data products are distributed to the community via the online and computer-compatible services of the NASA/IPAC Infrared Science Archive (IRSA).

i. Online Access

  1. Source Working Database and Other Tables

    The WISE/IRSA archive contains the Post-Cryo and Post-Cryo Preliminary Single-exposure Source Database that provide positions and photometry measured from the individual WISE Post-Cryo exposures, and the metadata tables associated with the Single-exposure images and source tables. Logical queries on the WISE Post-Cryo Databases can be made via the IRSA/Gator online query engine. Gator enables searches on any Table attribute, such as position, brightness, color, quality flags, etc., or combinations thereof. Queries may be submitted using either a simple "Query-By-Table" form or with user-customizable SQL input. For example, one common query type is to search for all sources within a specified sky region, which can be most efficiently achieved using the query panel with spatial constraints.

    Note: Gator is not designed to support very large downloads of the WISE Catalogs or Databases. Specifically, if the return data volume exceeds 2Gb, Gator will truncate the query. So be cautious when your return table is close to 2Gb in size. See below for Database bulk download instructions.

  2. Images

    Image data available in the WISE archive includes the Post-Cryo Single-exposure (L1b) images. These FITS format images, including science intensity images, uncertainty maps, and Bit-mask maps are accessed using the IRSA WISE Image Archive Service. This web-based interface enables selection, display and retrieval of any Single-exposure images based on position and time of observation using the information stored in the image metadata. The returned images are in the native pixel format and projection of the image products. Both interactive and batch requests are supported by the image service.

ii. Application Programming Interface

IRSA provides program-friendly interfaces to query and retrieve tabular and image data from the WISE mission. These URL-accessible services provide query and download functionality that can be accessed directly from a web browser, or by writing and running a simple "wget" or "curl" script on their local Unix system. Documentation on using these services is available on the IRSA site via the following links:

IRSA catalog query service (Gator) program interface documentation

IRSA image query service program interface documentation

iii. Electronic Access to the Full Source Working Database

The Post-Cryo Single-exposure Source Database is available in compressed bzip2 ASCII form for bulk download at

The Database is divided into multiple, separate compressed files, each file containing the source records within a distinct declination band. Wget scripts are available at the above URL to download all of the Database parts. The tables are formatted in a simple bar-delimited manner consistent with convenient loading into a database server. The column order and contents of the columns are as described in Section VIII.2.a.i.

Be aware that the Database Tables are extremely large, even in bzip2-compressed format. Please follow the links for each of the tables to determine how much storage space is required to download and unpack the tables.

Last update: 2017 June 8

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