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product names
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Data product names

The names of all calibration pipeline products follow a certain naming convention. This is done to have human-readable rather than technical file names. The naming scheme has been chosen to have the type of product, its date of creation, and its pipeline-relevant setup values recognizable in the product name.

The general format of user-oriented product file names is the same for all VLT/VLTI instruments.

On the archive interface, the master calibrations can be associated to science files and downloaded. Then they carry technical filenames (the archive filename ARCFILE). In order to rename them to the original filenames, search for the fits header key ORIGFILE. The naming scheme of ORIGFILE is described here.

Instrument code

All product names start with two letters which are specific for the instrument. For instance: UVES product names start with 'UV', VISIR names with 'VR'.

Product category

The full value of the product category is coded in the FITS header key HIERARCH.ESO.PRO.CATG. A short form of this tag is encoded in four characters being unique per instrument:

1st letter M or P calibration product
G general (static) calibration product
2nd to 4th letter ... type of product

Calibration products come in two flavours: dynamic ones (being updated regularly, short validity), and static ones (never or rarely updated). The static ones are also called 'general' because they often are not derived from raw data (like e.g. a line catalogue).

Both product types are stored in the archive and are available for download through the calSelector service.

All MUSE pipeline product names start with "MU_".

Dynamic calibrations. There are following types of dynamic calibration products of MUSE:

Code type of file PRO_CATG
MBIA master bias MASTER_BIAS
MDRK master dark MASTER_DARK
MFLA master lamp flat MASTER_FLAT
PFTT slices tracing table TRACE_TABLE
MFLS master sky flat MASTER_SKYFLAT
PWCT wavecal table WAVECAL_TABLE
MDCS datacube for standard star DATACUBE_STD
MSDR instrument response STD_RESPONSE
MSDT telluric lines STD_TELLURIC
MDCA datacube for astrometry DATACUBE_ASTROMETRY
MAWC wcs from astrometric observation ASTROMETRY_WCS

Static calibrations. The following table lists the codes in the name scheme:

Code type of file PRO_CATG
GASR astrometry reference table ASTROMETRY_REFERENCE
GBPT bad pixel table BADPIX_TABLE
GEOT geometry table GEOMETRY_TABLE
GEXT extinction table EXTINCT_TABLE
GFIL list of filters FILTER_LIST
GLNC catalog of spectroscopic lines LINE_CATALOG
GSFT standard stars flux table STD_FLUX_TABLE
GSKL sky lines SKY_LINES
GLST lsf table LSF_TABLE

The remaining part of the names follow the same convention as for the dynamic products (see below).

Date of origin, version

The date of origin is identical to the date of the raw data measurement. It is coded like, e.g., 141015 for Oct 15, 2014.

The version of a file is indicated by capital letters, starting with A. Versioning is supported when reasonable, otherwise it is always A.

Instrument parameters

The instrument parameters characterizing a setup are included in the product name. Most MUSE products have the following scheme:


  • INS.MODE is either WFM-NOAO-E (wide field mode - no AO - extended range) or WFM-NOAO-N (wide field mode - no AO - nominal range), or WFM-AO-N_Blue-Na2, WFM-AO-E_Na correspondingly
  • INS.OPTI1.NAME (filter) is either Clear, Blue for noAO and Na Blue-Na2 for AO modes

Static calibration products either have some setup part, or contain some self-explanatory string like e.g. MU_GSFT_140101A_stdflux_table.fits for the standard stars' table.


All product files have extension .fits. They have either image format or binary table format. NOTE: all MUSE image pipeline products have in addition to the image part extensions with the statistics (STAT) and data quality (DQ) for each IFU/CHANNEL.


MU_MBIA_140822A_WFM-NOAO-E_Clear_SCI1.0.fits: master bias taken on 2014-08-22

MU_MFLA_140606B_WFM-NOAO-N_Blue_SCI1.0.fits: master flatfield taken on 2014-06-06 (second one that day).

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