WISE 3-Band Cryo L3a Image Metadata Table

Quick Links

Associated Data Products

Overview

This catalog contains metadata for WISE 3-band Cryo 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. 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/cryo_3band/3band_p3am_cdd?<parameters>

For example, <root>/search/wise/cryo_3band/3band_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 3-band Cryo 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/cryo_3band/3band_p3am_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-int-3.fits

Example:

By appending center and size parameters (e.g <root>/data/wise/cryo_3band/3band_p3am_cdd/00/0083/0083p696_ab31/0083p696_ab31-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': '0083p696_ab31',
           '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/cryo_3band/3band_p3am_cdd/' + path

C code to build a URL:

char url[256];
char coaddgrp[3];
char coadd_ra[5];
const char *coadd_id = "0083p696_ab31";
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/cryo_3band/3band_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 = "0083p696_ab31";
String server = "serverroot";
int band = 1;
String url = String.format(
    "%1$s/data/wise/cryo_3band/3band_p3am_cdd/%2$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/cryo_3band/3band_p3am_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-unc-3.fits.gz

Example:

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/cryo_3band/3band_p3am_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-w{band:1d}-cov-3.fits.gz

Example:

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.

Positions of spurious sources from diffraction spikes

These are stored in IPAC ASCII table files containing 2 columns: ra and dec, the J2000 right ascensions and declinations of WISE 3-band Cryo Atlas sources believed to be spurious detections from diffraction spikes. If there are no such sources for a frame, then no position table is stored and visiting the URL generated according to the recipe below will return a 404 Not Found HTTP response. The tables are located at:

<server><root>/data/wise/cryo_3band/3band_p3am_cdd/{coaddgrp:s}/{coadd_ra:s}/{coadd_id:s}/{coadd_id:s}-art-w{band:1d}-D.tbl

Example:

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

Positions of spurious sources from optical ghosts

These are stored in IPAC ASCII table files containing 2 columns: ra and dec, the J2000 right ascensions and declinations of WISE 3-band Cryo Atlas sources believed to be spurious detections from optical ghosts. If there are no such sources for a frame, then no position table is stored and visiting the URL generated according to the recipe below will return a 404 Not Found HTTP response. The tables are located at:

<server><root>/data/wise/cryo_3band/3band_p3am_cdd/{scangrp:s}/{scan_id:s}/{frame_num:03d}/{scan_id:s}{frame_num:03d}-art-w{band:1d}-O.tbl

Example:

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

Positions of spurious sources from latents

These are stored in IPAC ASCII table files containing 2 columns: ra and dec, the J2000 right ascensions and declinations of WISE 3-band Cryo Atlas sources believed to be spurious detections from latents. If there are no such sources for a frame, then no position table is stored and visiting the URL generated according to the recipe below will return a 404 Not Found HTTP response. The tables are located at:

<server><root>/data/wise/cryo_3band/3band_p3am_cdd/{scangrp:s}/{scan_id:s}/{frame_num:03d}/{scan_id:s}{frame_num:03d}-art-w{band:1d}-P.tbl

Example:

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

Positions of spurious sources from halos

These are stored in IPAC ASCII table files containing 2 columns: ra and dec, the J2000 right ascensions and declinations of WISE 3-band Cryo Atlas sources believed to be spurious detections from halos. If there are no such sources for a frame, then no position table is stored and visiting the URL generated according to the recipe below will return a 404 Not Found HTTP response. The tables are located at:

<server><root>/data/wise/cryo_3band/3band_p3am_cdd/{scangrp:s}/{scan_id:s}/{frame_num:03d}/{scan_id:s}{frame_num:03d}-art-w{band:1d}-H.tbl

Example:

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