LIST OF PIPELINE PRODUCTS CODES

The names of all 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 parameter values all recognizable from the product name.

Since the begin of period 75 (April 2005), both science and calibration product files are renamed. (Actually, there was a transition phase extending for some instruments from April towards the end of the year 2005).

Before that date only calibration products followed the common scheme which is described here. (Some instruments had their own naming scheme which is described below, if applicable).

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

Instrument code

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

Type of product

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

1st letter M or P calibration product   S science product   G general calibration product (as of P82) 2nd to 4th letter ... type of product

instrument code

With the beginning of 2006 all ISAAC calibration product and science product names have changed as part of a major upgrade. The product names start with IS_.

All products based on observations and calibrations taken before 2006 follow the old naming scheme.

product type

The type of product is coded with four letters:
 

1st letter S for science 1st letter M for master calibration 1st letter P for calibration products 2nd - 4 th letter .[A-Z][A-Z][A-Z] for product specific naming

Table 1: composition of the 4-letter product code

calibration product letter code

The following Table 2 shows the naming convention, the product category key given in the product header and short description of the calibration product type:

Table 2: calibration product naming scheme

Static calibration product letter code

With P82 (October 2008), the static calibration products are also named according to the standard ISAAC naming scheme. Before that date their names did not follow a strict naming scheme. The following table lists the codes in the new name scheme:

Table 3: Static calibration product naming scheme

science product letter code

The following Table 4 shows the types of science products:

Code PRO.CATG Type of file IS_SICO COADDED_IMG, LW_COADDED_IMG science coadded image, (SW, LW) IS_SISO STARS_TAB table of extracted sources IS_SISK SKY_TAB table of sky background values       IS_SCOM OBS_COMBINED science co-added spectrum IS_SEXT OBS_EXTRACTED science extracted spectrum

Table 4: science product naming scheme

date

The date of origin is identical to the date of the raw data measurement. It is coded as, e.g., YYMMDD (e.g. 000915 for Oct 15, 2000). The version of a file is indicated by capital letters always starting with A.

instrumental parameters

For calibration products the following setup parameters are included:

• darks: arm, readmode, DIT : (e.g. IS_MDRK_060101A_SW_NonDest_120.fits)
• photometric zeropoints, twilight flats and illumination products: arm, filter (e.g. IS_PIZP_060101A_SW_H.fiits)
• linearity products: arm, readmode (e.g. IS_PLIA_060201A_LW_DoubleCorrLowBias.fits)
• spectroscopic flats, flux standard stars and telluric standards: arm, grating, filter, wavelength, slit (e.g. IS_MSFL_060301A_SW_LR_2.200_SK_sl2.fits)
• startrace frames: arm, grating (e.g. IS_PSTS_060101A_SW_LR.fits)
• spectroscopic arc frames: arm, grating, filter, wavelength, slit, lamp (e.g. IS_PACF_060301A_SW_MR_2.323_SK_sl2_Xe+Ar.fits)

Science products have the following naming scheme:

• science imaging products: OB number, timestamp of acquisition, arm, filter
  (e.g. IS_SICO_234567_2006-03-01T03:22:17_LW_J+Block.fits)
• science spectroscopy products: OB number, timestamp, arm, grating, filter, wavelength, slit
  (e.g. IS_SCOM_12765_2006-03-17T05:17:33_SW_MR_SZ_1.295_sl03t.fits)

where

• wavelength is the central wavelength in microns (e.g. 2.102),
• filter is either a broad band or a narrow band filter (e.g. Ks, NB_2.13),
• slit is coded as sl1, sl2, or sl03t, where t is the abbreviation for tilted
• lamp is coded as Xe or Ar or Xe+Ar, dependent on which calibration lamp is used.
• grating is either LR or MR
• arm is either SW or LW
• DIT is coded without trailing zeros (e.g 10.000000 becomes 10, 3.5534600 becomes 3.55346)
• readmode is the full string of the detetcor DET.NCORRS.NAME key, e.g. DoubleCorrHighBias.