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 viper@uni-goettingen.de 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).