Data Model: oow

General Description
The oow files contain exposure level inverse variance weights from the telescope after reduction by the NOIRLab Community Pipeline. For each file, an extension is present for each CCD present in the exposure. For most exposures, this is 62. Only S29 is shown in the data model for clarity.
Naming Convention
c4d_[0-9]{6}_[0-9]{6}_oow_[grizY]_v1\.fits\.fz, where the numeric label corresponds to a rough exposure date-time, "oow" indicates this is a weights file, the band observed is indicated (grizY), and a version number for the NOIRLab community pipeline which performs image preprocessing is appended. This naming convention follows the convention set by NOIRLab.
Approximate Size
311 MB
File Type
FITS
Sections

HDU0: PRIMARY

Exposure level header containing meta information about the telescope, pointing, etc. For more details, see the NOIRLab (formerly NOAO) documentation. Identical to ooi file in structure (see ooi model), though may differ in some values (for example write time or compression dither seed).

HDU1: S29

Weights from the CCD specified by the HDU name. Header contains CCD level information from the telescope. Header structure identical to ooi file (see ooi model), though may differ in some values.

HDU Type
IMAGE
HDU Size
5 MB

Examples

An example oow file is linked here: c4d_190503_101849_oow_z_v1.fits.fz