Finder Chart is a visualization tool that allows cross-comparison
of images from various surveys of different wavelengths and different
epochs. In addition to web-viewable JPEGs, images in FITS format are
also available for download either singly or in bulk. In this release
access is provided to imaging data sets from the Two Micron All Sky
the Digitized Sky Surveys
(both First and Second Generation), and the Sloan Digital Sky Survey
Data Release 7). Here is a summary of
information on these datasets
Currently the table upload option is restricted to no more than 1000
positions. The service can be accessed by an
HTTP program interface
DSS and SDSS data do not reside at IRSA; the successful retrieval of
DSS and SDSS data depends on the operations of the DSS and SDSS services.
Reprojected images maintain exact photometry whereas the default
images use a nearest-neighbor pixel interpolation (faster) that
cannot be used for photometric measurement.
This service makes use of components of Montage, funded by the National
Aeronautics and Space Administration's Earth Science Technology Office,
Computational Technologies Project, under Cooperative Agreement
Number NCC5-626 between NASA and the California Institute of Technology.