WISE 4-Band AllSky Atlas (L3a) Images

Quick Links

Associated Data Products

Intensity FITS images
Uncertainty FITS images
Coverage FITS images
Positions of spurious sources from diffraction spikes
Positions of spurious sources from optical ghosts
Positions of spurious sources from latents
Positions of spurious sources from halos

Overview

This catalog contains metadata for WISE AllSky Atlas (L3a) Images. 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/allsky/4band_p3am_cdd?<parameters>

For example, <root>/search/wise/allsky/4band_p3am_cdd?POS=10,70 returns metadata for coadds containing (RA, Dec) = (10, 70) deg. Query parameters are documented here.

Generating URLs for data products

WISE AllSky Atlas 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/allsky/4band_p3am_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/allsky/4band_p3am_cdd/00/0083/0083p696_ab41/0083p696_ab41-w3-int-3.fits?center=10,70&size=200pix), one can also download cutouts (see the documentation).

Python code to build a URL:

params = { 'coadd_id': '0293p696_ab41',
           'band': 1,
         }
params['coaddgrp'] = params['coadd_id'][:2]
params['coadd_ra'] = params['coadd_id'][: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/allsky/4band_p3am_cdd/' + path

C code to build a URL:

char url[256];
char coaddgrp[3];
char coadd_ra[5];
const char *coadd_id = "0293p696_ab41";
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/allsky/4band_p3am_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 = "0293p696_ab41";
String server = "serverroot";
int band = 1;
String url = String.format(
    "%1$s/data/wise/allsky/4band_p3am_cdd/%2$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/allsky/4band_p3am_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).