Raw Data

IGRINS-2 data are stored in Multi-Extension FITS (MEF) files, following the Gemini Standard data format. Each raw dataset consists of 5 MEF files, with the following structure:

• Extension 0: Primary Header Unit
• Extension 1: H-band data and header
• Extension 2: K-band data and header
• Extension 3: Compressed SVC images of the field in a cube
• Extension 4: Uncompressed, cut-out SVC images of the slit region in a cube
• Extension 5: Binary table containing the full headers of the SVC images in Extension 3

Data Reduction

IGRINS-2 data will be reduced using a dedicated IGRINS Pipeline Package (PLP), developed specifically for IGRINS-2. The pipeline will be integrated into Gemini's DRAGONS plaform in the future and made publicly available. Until then, IGRINS-2 data will be processed by the instrument team, and the reduced data will be accessible via the Gemini Observatory Archive within 4 weeks after observation. For inquiries or support regarding data reduction, please contact igrins2_science@noirlab.edu.

Reduced Data Products

For detailed description, see this page. 

• spec.fits: 1D extracted spectrum:
  • Extension 1: 1D spectrum
  • Extension 2: 1D variance
  • Extension 3: Wavelength array (in microns)
• spec2d.fits: Rectified 2D spectrum:
  • Extension 1: 2D spectrum
  • Extension 2: 2D variance
  • Extension 3: Wavelength array (in microns)
• spec_a0v.fits: Telluric-corrected 1D spectrum:
  • Extension 1: Target spectrum divided by A0V standard star, scaled by a Vega model
  • Extension 2: 1D variance
  • Extension 3: Wavelength array (in microns)

Citation

The primary reference to be cited by users of the IGRINS-2 PLP is:

• Kaplan, K., Lee, J.-J, Sawczynec, E., Kim, H.-J. 2024, igrins/plp, v3.0.0, Zenodo, doi:10.5281/zenodo.11080095

Useful Links

• IGRINS-2 Pipeline Wiki