Output Product: HEALPix Depth Map

Data product name

VMPZIDHEALPixDepth

Data product custodian

VMPZ-ID

Data model tag

(TBF for ML2A)

Name of the Schema file

(TBF for ML2A)

Schema documentation tag

(TBF for ML2A)

Data product elements

(TBF for ML2A)

Processing Element(s) creating/using the data product

VMPZ-ID

Processing function using the data product

LE3

Detailed description of the data product

This output product is a partial HEALPix map collecting the depth maps, collected as (floating point) weights in the map.

It includes the DepthMapHealpix metadata, a container with a FITS file (of type le3.id.vmpz.healpixdepthmap) describing the depth map for the survey in (partial) HEALPix format, for a given observed band/instrument (Euclid/EXT), and a raw description with polygons of the envelope of the sky covered is added as well to ease future queries on the product (SpatialCoverage metadata, spatialFootprint). Finally, the mask parameters DepthMapHealpixParams can optionally be associated to the product.

Keywords (Primary HDU)

The primary HDU is expected to contain the following keywords, characterizing important parameters of the input product:

  1. DATE-OBS: start of observation with format ‘yyyy-mm-ddThh:mm:ss.sss’ [StringKeyword]

  2. DATE-END: end of observation with format ‘yyyy-mm-ddThh:mm:ss.sss’ [StringKeyword]

  3. TELESCOP: name of the telescope [StringKeyword]

  4. INSTRUME: name of the instrument [StringKeyword]

  5. FILTER: name of the filter [StringKeyword]

  6. FILTLST: selection of filter if intersection of multiple footprints [StringKeyword]

  7. TILEID: identifier of the MER Tile processed (-1 if multiple Tiles) [IntegerKeyword]

  8. LISTID: identifier of a MER list of tiles product (-1 if single Tile) [StringKeyword]

  9. NSIDE_WK: Nside parameter used for frame->HEALPix [StringKeyword]

  10. BITSEL: identifier of the bit of combination of bits used in the depth map (e.g. 0 for least significant bit,..,18) [StringKeyword]

  11. DEPTHEST: estimator used for depth computation [StringKeyword]

and basic software parameters:

  1. SOFTNAME: name of software used [StringKeyword]

  2. SOFTVERS: version of software used [StringKeyword]

Partial HEALPix Footprint Table (First Extension, Binary Table)

The following keywords are used to describe what HEALPix conventions are followed:

  1. TTYPE1 (= ‘PIXEL’) [StringKeyword]

  2. TFORM1 (= ‘K’) [StringKeyword]

  3. TTYPE2 (= ‘WEIGHT’) [StringKeyword]

  4. TFORM2 (= ‘E’) [StringKeyword]

  5. PIXTYPE (= ‘HEALPIX’) [StringKeyword]

  6. ORDERING (= ‘RING’ or ‘NESTED’) [StringKeyword]

  7. COORDSYS (= ‘C’=celestial, ‘E’=ecliptic or ‘G’=galactic) [StringKeyword]

  8. EXTNAME (= ‘DEPTH_MAP’) [StringKeyword]

  9. NSIDE [IntegerKeyword]

  10. INDEXSCHM (= ‘EXPLICIT’) [StringKeyword]

  11. OBJECT (= ‘PARTIAL’) [StringKeyword]

The table is then expected to contain the following columns:

  1. PIXEL: index of pixel [K, int64]

  2. WEIGHT: (floating-point) weight associated to pixel indicating the depth [E, float32]

Note

This is supposed to be object an independent measure