CRIRES-Specific Tools and Tips

This page refers to the upgraded CRIRES which is currently installed at UT3. For the original (pre-upgrade, pre-August 2014) CRIRES please use the following link.

Generic Tools and information


High S/N flat fields

On a regular basis, we take high S/N flat fields in all wavelength settings, with a minimum S/N of 500 per pixel per exposure. The flat fields are available in the CRIRES specific raw data archive and can be searched there by selecting DPR TYPE = 'FLAT', NDIT '>15' and the desired wavelength setting.


Data Reduction Pipeline

Upgraded instrument: all information is provided on the cr2res pipeline page. Note that the cr2res pipeline is NOT compatible with data taken with the original instrument (pre-upgrade).


VIPER: RV analysis tool  

The RV analysis tool VIPER allows the calculation of radial velocities from CRIRES data with a simultaneous wavelength reference (gas cell data or telluric lines). In case of bugs, questions or requests for feature options, send email to starting the subject with VIPER. Publications using VIPER should cite the following article Zechmeister, Köhler and Chamarthi 2021, Astrophysics Source Code Library, record ascl:2108.006.


Molecfit: correction of telluric lines

A prototype Molecfit workflow for CRIRES has been released.


Line lists and FTS scans of gas cells

  • Calibration tables from NIST. This link provides wave numbers for a number of molecules, useful to calibrate CRIRES spectra from atmospheric lines. In wave number, CRIRES spectral range is [1850 - 10520]/cm.
  • FTS scan of Short Gas Cell (SGC) in the H-band (*.gz, 2.5 MB) and K-band (*.gz, 2 MB)
  • FTS scan of N2O Gas Cell in the LM-bands (*.gz, 1 MB)


Catalogues of telluric standard stars:

Catalogues of spectro-photometric standard stars:

Optical Spectrophotometric Standards of SpT B4-A9. Models for these stars in the range 950 to 5300 nm are collected in this gzipped FITS binary file, part of the static calibration frames (19.3 MB).