2MASS All-Sky Image Metadata Table
Quick Links
Associated Data Products
Overview
This catalog contains metadata for 2MASS All-Sky Images. Each row in the catalog consists of metadata for a single image, and is uniquely identified by the ordate, hemisphere and fname columns. A complete listing of available columns can be accessed by clicking the link above.
Metadata queries can be issued at the following URL:
For example, <root>/search/twomass/allsky/allsky?POS=0,0 returns metadata for images containing (RA,Dec) = (0, 0). Query parameters are documented here.
Generating URLs for data products
2MASS All-Sky Image data product URLs are built using the values of the ordate, hemisphere, scanno, and fname columns.
- All-Sky FITS Images
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These are located at:
<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/image/{fname:20s}Examples:
- <root>/data/twomass/allsky/allsky/990916n/s028/image/hi0280150.fits.gz
- <root>/data/twomass/allsky/allsky/000122s/s070/image/ki0700033.fits.gz
By appending center and size parameters (e.g. <root>/data/twomass/allsky/allsky/990916n/s028/image/hi0280150.fits.gz?center=352.38,38.63&size=100pix), one can also download cutouts (see the detailed documentation).
Python code to build a URL:
params = { 'ordate': 990916, 'hemisphere': 'n' 'scanno': 028 'fname': 'hi0280150.fits.gz' } path = str.format( '{ordate:6d}{hemisphere:1s}/s{scanno:03d}/image/{fname:20s}' **params) url = 'serverroot/data/twomass/allsky/allsky/' + path
C code to build a URL:
char url[256]; const char *ordate = "990916"; const char *hemisphere = "n"; const char *fname = "hi0280150.fits.gz"; const char *server = "serverroot"; int scanno = 28; snprintf( url, sizeof(url), "%s/data/twomass/allsky/allsky/%s%s/s%03d/%s", server, ordate, hemisphere, scanno, fname );
Java code to build a URL:
String ordate = "990916"; String hemisphere = "n"; String fname = "hi0280150.fits.gz"; String server = "serverroot"; int scanno = 28; String url = String.format( "%1$s/data/twomass/allsky/allsky/%2$s%3$s/s%4$03d/%5$s", server, ordate, hemisphere, scanno, fname );
- Glint Artifact Tables
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These are located at:
<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/glint.tblExamples:
- <root>/data/twomass/allsky/allsky/000102s/s015/glint.tbl
- <root>/data/twomass/allsky/allsky/981108n/s116/glint.tbl
A trivial change to the format string in the sample code snippets above suffices to generate these URLs.
- Persistence Artifact Tables
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These are located at:
<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/pers.tblExamples:
- <root>/data/twomass/allsky/allsky/000102s/s015/pers.tbl
- <root>/data/twomass/allsky/allsky/981108n/s116/pers.tbl
A trivial change to the format string in the sample code snippets above suffices to generate these URLs.