ISAAC pipeline: codes for product files

ISAAC pipeline:
old (up to 2005) product naming scheme

List of codes for ISAAC pipeline products

Names of calibration products follow a certain naming convention. This is done to have human-readable names rather than archive or original 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 its name. With period 67, also an instrument code is added.

Instrument code

With the begin of period 67 (2001-04-01), all ISAAC calibration product names start with IS_ in order to be able to distinguish between, e.g., spectroscopic flat frames from FORS and ISAAC in case of archive downloads. The other VLT instruments follow the same scheme, i.e. their calibration products also start with a 2letter instrument code.

All earlier files delivered carry the old names without instrument code.

Type of product

The type of product is coded with four letters:

1^stletter S or L short or long wavelength arm

2^nd letter .I, S.or G imaging, spectroscopy or generic

The following types of calibration products presently exist *)

Code	Type of file
IS_SIDK	short wavelength imaging dark
IS_SITF	short wavelength imaging twilight flat
IS_GIZP	short wavelength generic imaging zero point
IS_SSDK	short wavelength spectroscopic dark
IS_SIIL	short wavelength imaging illumination

IS_SSFL	short wavelength spectroscopic flat low resolution
IS_SSFM	short wavelength spectroscopic flat medium resolution
IS_SSAL	short wavelength spectroscopic arc table low resolution
IS_SSAM	short wavelength spectroscopic arc table medium resolution
IS_SSSL	short wavelength spectroscopic standard low resolution
IS_SSSM	short wavelength spectroscopic standard medium resolution
IS_SSST	short wavelength spectroscopy startrace

IS_LGDD	long wavelength generic dark DoubleCorrelatedHigh readout
IS_LGDU	long wavelength generik dark Uncorr readout
IS_LGDF	long wavelength generic dark Fowlersampling readout
IS_LITF	long wavelength imaging twilight flat
IS_LISF	long wavelength imaging sky flat
IS_LIZP	long wavelength imaging zero point
IS_LIIL	long wavelength imaging illumination
IS_LILI	long wavelength imaging linearity

IS_LSAL	long wavelength spectroscopic arc tabler low resolution
IS_LSAM	long wavelength spectroscopic arc table medium resolution
IS_LSFL	long wavelength spectroscopic flat low resolution
IS_LSFM	long wavelength spectroscopic flat medium resolution
IS_LSST	long wavelength spectroscopy startrace

The following types of science products presently exist:

Code Type of file

IS_SIJC short wavelength imaging jittered coadded

IS_SSCL short wavelength spectroscopy coadded LowRes grating

IS_SSCM short wavelength spectroscopy coadded MedRes grating

IS_LIJC
long wavelength imaging jittered coadded

IS_LSCL long wavelength spectroscopy coadded LowRes grating

IS_LSCM long wavelength spectroscopy coadded MedRes grating

Date of origin, version

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

Those parameters which are relevant for the specific type of calibration product are included in its name.

Darks, like SIDK, SSDK, LGDU, LGDF and LGDD, the DIT (discrete integration time) is given (e.g. IS_SIDK_011025B_DIT=10.fits)
GIZP is coded as <UT>_<STD>_<FILTER> (e.g. IS_GIZP_011104A_08_S842E_Js.paf)
SITF, the filter is given (e.g. IS_SITF_012212_Ks.fits)
spectroscopic arcs use <FILTER>_<SLIT>_<WLEN>_<LAMP> (e.g. IS_SSAL_012205A_SK_s06t_2202_Xe.tfits)
spectroscopic flats use <FILTER>_<SLIT>_<WLEN> (e.g. IS_SSFM_011104A_J_sl1_1253.fits)
science images use <FILTER>_<OB>
science spectroscopy use <FILTER>_<SLIT>_<WLEN>_<OB>
spectroscopic standards use <STD>_<FILTER>_<SLIT>_<WLEN>_<OB>

where

STD is the name of the standard,
WLEN is the central wavelength in microns (2.102 micron is coded as 210 and 0.903 micron is coded as 090),
(since 2004-04-01) WLEN is the central wavelength in microns (2.102 micron is coded as 2102 and 0.903 micron is coded as 0903),
FILTER is either a broad band or narrow band filter (e.g. Ks),
SLIT is coded as sl1, sl2, or s03t, where t is the abbreviation for tilted
LAMP is coded as Xe or Ar or Xe+Ar, dependent oln which calibration lamp is used.
UT is coded as hh (e.g. 03)

Extension

2D product images contain the .fits extension. 1D data with the .tfits extension are given in fits table format. The pipeline provides in addition VLT compliant plain ASCII parameter files with the .paf extension. Extractions of the eclipse log file are given with a .log extension. The pipeline jitter and spjitter recipes produce in addition ini files with the .ini extension and a status file with the .ascii extension. The calibration associtiation tools provide a calibration list with the .calibs extension.

Send comments to <Wolfgang.Hummel@eso.org>
Last update: Apr.. 23, 2004