WISE Preliminary Release Atlas Images

SIA query base URL	<root>/sia/wise/prelim/p3am_cdd
SIA metadata query URL	<root>/sia/wise/prelim/p3am_cdd?FORMAT=METADATA
Query base URL	<root>/search/wise/prelim/p3am_cdd
Column listing	<root>/search/wise/prelim/p3am_cdd?FORMAT=METADATA&ct=html
Browse data	<root>/data/wise/prelim/p3am_cdd/

Overview

The wise/prelim/p3am_cdd catalog contains metadata for WISE Preliminary Release Atlas images. Each row in the catalog consists of metadata for a single coadd, and is uniquely identified by the coadd_id and band columns. This page documents the URL structure of the WISE Preliminary Release Atlas images, and how one goes about mapping the results of a query like <root>/search/wise/prelim/p3am_cdd?POS=10,50 to associated data product URLs.

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

Generating URLs for data products

WISE Preliminary Release 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/prelim/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/prelim/p3am_cdd/00/0092/0092p499_aa11/0092p499_aa11-w3-int-3.fits?center=10,50&size=200pix), one can also download cutouts (see the documentation).

Python code to build a URL:

params = { 'coadd_id': '0092p499_aa11',
           '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/prelim/p3am_cdd/' + path

C code to build a URL:

char url[256];
char coaddgrp[3];
char coadd_ra[5];
const char *coadd_id = "0092p499_aa11";
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/prelim/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 = "0092p499_aa11";
String server = "serverroot";
int band = 1;
String url = String.format(
    "%1$s/data/wise/prelim/p3am_cdd/%2$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/prelim/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).