SkyView name and links to interfaces and help SkyView Home Page SkyView Help Page SkyView Non-Astronomer Interface SkyView Basic Interface SkyView Advanced Interface SkyView Java Interface SkyView Home Page

SkyView in a Jar

--- Version 2.1 released March 5, 2007 ---
Today you can run SkyView on your own machine! You can get SkyView's capabilities without going through SkyView's Web site with the new SkyView-in-a-Jar tool.

Just download one file, the SkyView JAR, to get started. The SkyView JAR is executable so that you can use it immediately, e.g., try

    java -jar skyview.jar survey=dss position=3c273 
after you download the file. This should generate a file output.fits with the an image of 3C273 from the Digitized Sky Survey.

You will need a recent version of Java (at least V1.5 or 5 depending upon whether whether you are talking about the development environment or language) or higher which is available for all major platforms. For Linux, Windows and SPARC platforms you can find the latest release through the Sun Java web pages . A MacOS/X version and installation instructions are also available.

This application supports the functionality of the SkyView Web pages for generating files. It includes essentially all the surveys available through the standard SkyView web interface. You can generate FITS and graphic images. The program lets you treat your own files as surveys and you can add other surveys linking tp external data you might be interested in. It is especially easy to add a survey when the data is available through the Virtual Observatory Simple Image Access protocol.

Features include:

  • >70 surveys
  • Grid overlays, contours, smoothing
  • Catalogs from HEASARC, VizieR, NED and other VO sources
  • ImageJ data visualization capabilities
  • Outputs in FITS and several graphic image formats including JPEG, GIF, BMP and TIFF.
  • High order resamplers including Lanczos and Spline resampling which retain more information when using well-sampled images.
  • An efficient exact-area flux-conserving reampler.
  • Several de-edging algorithms to match image backgrounds when mosaics are made from images with disparate backgrounds.
  • Several ways of choosing the source image to sample.
  • Multi-order samplers (using a low order sampler near image defects)
  • Smaller memory footprint which enables very large images to be generated.
  • Ability for users to easily add in their own surveys.
  • Easy linking to datasets described by the Virtual Obsevatory Simple Image Access protocol
  • Extensible design that allows users to plug in their own samplers, projections, coordinate systems, mosaickers, ... to deal with any special requirements they might have.
  • Independent processing so that users do not share the limited resources of the SkyView Web server. The program can run on many clients simultaneously.
  • Java source files included in the JAR for users who wish to modify or extend functionality.

Highlights of V2.1

  • New surveys
    • ROSAT All Sky Survey intensity maps.
    • Much improved IRAS survey image (IRIS).
    • EUVE and ROSAT WFC extreme UV surveys
    • nH all-sky map
    • The original DSS survey along with DSS1R and DSS1B surveys.
  • New capabilities
    • New 'offset 'setting allows generation of image segments.
    • Image contours with specified scaling, numbers and limits.
    • Changes to FITS processing to allow larger images.
    • Smoothing of output images.
    • Independent smoothing settings for contours and components of RGB images.
    • New plotting settings
  • Regression tests included
  • Upgrade to using ImageJ v1.38k
  • Support for CGI processing
  • Formatted output of survey descriptions
  • Revised and enhanced documentation

A User's Guide is available in Word and HTML. The JavaDocs for the Java classes are also available.

Please contact Tom McGlynn or Laura McDonald if you have questions or comments about this package.