Finder Chart

2MASS, SDSS, and DSS Cutouts

Single Location             Upload Table
Examples:  14h22m23.77s -00d23m15.58s Equ J2000
| 345.11412 +54.85590 gal | NGC5584
Default:  Equatorial J2000  Instructions coordinate examples
Subimage Size arcmin    (Size range:1.0 to 6.0 arcmin)

Flip Instructions
Reproject Instructions
Takes longer, but maintains flux.
Also allows 3color images when
selected. Instructions
Coordinate Grid
Mark Input Position

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 Survey (2MASS) , the Digitized Sky Surveys (DSS) (both First and Second Generation), and the Sloan Digital Sky Survey (SDSS 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.

Caution: 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.