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:

<server><root>/search/twomass/allsky/allsky?<parameters>

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

These are located at:

<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/image/{fname:20s}

Examples:

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

These are located at:

<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/glint.tbl

Examples:

A trivial change to the format string in the sample code snippets above suffices to generate these URLs.

Persistence Artifact Tables

These are located at:

<server><root>/data/twomass/allsky/allsky/{ordate:6d}{hemisphere:1s}/s{scanno:03d}/pers.tbl

Examples:

A trivial change to the format string in the sample code snippets above suffices to generate these URLs.