WISE Pass 1 Level 3o (Operational Coadd) Image Metadata Table

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Associated Data Products

Overview

This catalog contains metadata for WISE Pass 1 Level 3o (operational) coadds. Each row in the catalog consists of metadata for a single coadd, and is uniquely identified by the coadd_id and band 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/wise/pass1/i3om_cdd?<parameters>

For example, <root>/search/wise/pass1/i3om_cdd?POS=10,0 returns metadata for coadds containing (RA,Dec) = (10, 0) deg. Query parameters are documented here.

Generating URLs for data products

WISE Pass 1 Level 3o data product URLs are built using the values of the coadd_id and band columns. For the purposes of illustrating URL generation, we introduce two quantities derived from coadd_id: coaddgrp and coadd_ra. Please note that these do not correspond to columns in the metadata table. The first quantity, coaddgrp, consists of the first 2 characters of coadd_id. The second, coadd_ra, consists of the first 4 characters of coadd_id.

Note: MD5 checksums for all data products are stored. Checksum URLs are obtained by simply appending ".md5" to the data product URL.

Intensity FITS images

These are located at:

<server><root>/data/wise/pass1/i3om_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-int-3.fits

Examples:

By appending center and size parameters (e.g <root>/data/wise/pass1/i3om_cdd/00/0099/0099p001_d197_2/0099p001_d197_2-w1-int-3.fits?center=10,0&size=200pix), one can also download cutouts (see the documentation).

Python code to build a URL:

params = { 'coadd_id': '0099p001_d197_2',
           'band': 1,
         }
params['coaddgrp'] = params['coadd_id'][:2]
params['coadd_ra'] = params['coadd_ra'][:4]
path = str.format(
    '{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-int-3.fits',
    **params)
url = 'serverroot/data/wise/pass1/i3om_cdd/' + path

C code to build a URL:

char url[256];
char coaddgrp[3];
char coadd_ra[5];
const char *coadd_id = "0099p001_d197_2";
const char *server = "serverroot";
int band = 1;
memcpy(coaddgrp, coadd_id, 2);
coaddgrp[2] = '\0';
memcpy(coadd_ra, coadd_id, 4);
coaddgrp[4] = '\0';
snprintf(url, sizeof(url),
         "%s/data/wise/pass1/i3om_cdd/%s/%s/%s/%s-w%1d-int-3.fits",
         server, coaddgrp, coadd_ra, coadd_id, coadd_id, band);

Java code to build a URL:

String coadd_id = "0099p001_d197_2";
String server = "serverroot";
int band = 1;
String url = String.format(
    "%1$s/data/wise/pass1/i3om_cdd/%2$s/%3$s/%4$s/%4$s-w%5$1d-int-3.fits",
    server, coadd_id.substring(0,2), coadd_id.substring(0,4), coadd_id, band);
Uncertainty FITS images

These are located at:

<server><root>/data/wise/pass1/i3om_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-unc-3.fits.gz

Examples:

Append center and size parameters to these URLs to download a cutout instead of a full image (see the cutouts documentation).

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

Coverage FITS images

These are located at:

<server><root>/data/wise/pass1/i3om_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-cov-3.fits.gz

Examples:

Append center and size parameters to these URLs to download a cutout instead of a full image (see the cutouts documentation).

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