All products of the CRIRES pipeline that are delivered to end-users or are ingested into the ESO archive follow certain naming conventions. This is done to have human-readable names rather than archive or original file names. Naming schemes exist for both calibration and science products.

 

CALIBRATION PRODUCT CODES

Naming scheme

The naming scheme has the product type, the date of creation, and pipeline-relevant parameter values all recognisable from its name. The general scheme is:

CR_<TYPE>_<DATE><VERSION>_<PARAMS>.<SUFFIX> .

Instrument code

All CRIRES calibration product names start with CR. All VLT instruments follow the same scheme, i.e. their calibration products also start with a two letter instrument code.

Type of product

The product type is given by the fits key HIERARCH.ESO.PRO.CATG. A short form of this is coded in the name using a four character scheme:

1st letter P product file 2nd to 4th letter ... type of product

The following types of calibration products presently exist:

Date of origin, version

The date of origin is identical to the date of the raw data measurement. It is coded as, e.g., 070402 for Apr 02, 2007. The version of a file is indicated by capital letters always starting with A. Versioning is supported for most types of files (see table above). In the remaining cases, only one version per day is created (version is always A).

Instrumental parameters

Those parameters which are relevant for the specific type of calibration product are included in its name. The following schemes are used:

PARAMETER CODE USED FOR FILE TYPES DIT<DIT> PDRK <WLEN>nm PFLT, PDIS, PWMA DIT<DIT>_<WLEN>nm PEFF, PEXT, PCOM, PPRF, PCON

where

PARAMETER EXPLANATION VALUES <DIT> detector DIT in sec e.g. 1, 15, 60 <WLEN> reference wavelength on chip 3 in nm e.g. 1090.4

Extension

All files have extension .fits .

Examples

CR_PDRK_070402A_DIT60.fits is a dark product (master) frame from 2007-04-02 with DIT=60 sec.

CR_PDIS_070411B_1648.9nm.fits is the second (from at least two) dispersion solution table from 2007-04-11 for 1648.9 nm reference wavelength.

CR_PEFF_070411A_DIT15_5050.4nm.fits is a standard star product for 5050.4 nm reference wavelength measured with DIT=15 sec on 2007-04-11.

Naming scheme

The naming scheme has the product type, the ID of the observation block, a time stamp, and pipeline-relevant parameter values all recognisable from its name. The general scheme is:

CR_<TYPE>_<OB_ID>_<TIMESTAMP>_<PARAMS>.<SUFFIX> .

Instrument code

CRIRES science product names start with CR. All VLT instruments follow the same scheme, i.e. their calibration products also start with a two letter instrument code.

Type of product

The product type is given by the fits key HIERARCH.ESO.PRO.CATG. A short form of this is coded in the name using a four character scheme:

1st letter S science product file 2nd to 4th letter ... type of product

The following types of calibration products presently exist:

The ID of the observation block that has been used to measure the raw science frame. It has usually six digits, e.g. 154718.

Time stamp

The time stamp has the form <YEAR>-<MONTH>-<DAY>T<HOUR>:<MINUTE>:<SECOND>.<MILLISEC>. It has the same value that is used in the archive filename of the raw file, e.g. 2007-04-18T04:45:19.435.

Instrumental parameters

The instrumental parameters for the science frames are the same as for the calibrations in order to identify matching files:

PARAMETER CODE USED FOR FILE TYPES DIT<DIT>_<WLEN>nm SEXT, SCOM, SCON, SPRF, SBGD, SWMA, SWMP

where

PARAMETER EXPLANATION VALUES <DIT> detector DIT in sec e.g. 1, 15, 60 <WLEN> reference wavelength on chip 3 in nm e.g. 1090.4

Extension

All files have extension .fits .

Example

VI_SEXT_218201_2007-04-02T08:53:01.761_DIT30_1202.9nm.fits: table with extracted science spectra, statistical errors, etc.; the ID of the OB was 218201, the (first) raw file was measured on 2 April 2005 at 08:53:01.761 (UT) with reference wavelength 1202.9 nm and a DIT of 30 sec.