This postage Stamp server for 4 Meter All Sky Survey (4MASS) returns radio images of the sky in FITS or JPEG format, or as a contour plot. For detailed general instructions or information about this survey, see the Help File under "general"; or use the links on the forms for help about each item.
The 4MASS survey is being carried out by the NRAO and the Naval Research Lab.
Note: The 4MASS survey has not yet been approved for completion of observations with the VLA. What are available at present are the results of initial observations which include only a small portion of the sky. Much of the region between +70 and +80 degrees declination is included and most of a region bounded by RA=10 50 to RA=18 40 and dec=14 to dec=36.
Note: these images will have a relatively high dynamic range which will cause them to appear as white dots on a black background unless the viewer used has suitable control over brightness, contrast and the range of values to be displayed. The "noise" level in these images is about 100 mJy/beam.
Entire 14 x 14 deg fields can be obtained here or through a simplified form interface. The entire source catalog as a FITS binary table and software here. (Reminder: shift-click will generally force your browser to save the requested image to a file rather than displaying it in a text window.) A catalog browser server is also available to lookup positions in the catalog.
the FITSview family of FITS image viewers is available for a variety of computer systems. For a short discussion of installing external viewers for FITS files click here.
The (USA) National Radio Astronomy Observatory (NRAO) is operated by Associated Universities, Inc. and is a Facility of the (USA) National Science Foundation.Comments? Questions? Problems?