status DOI

IGRINS RV: A Radial Velocity Pipeline for IGRINS#

IGRINS RV is a python open source pipeline for extracting radial velocities (RVs) from spectra taken with the Immersion GRating INfrared Spectrometer (IGRINS). It uses a modified forward modeling technique that leverages telluric absorption lines as a common-path wavelength calibrator. IGRINS RV achieves an RV precision in the H and K bands of around 25-30 m/s for narrow-line stars, and it has successfully recovered the planet-induced RV signals of both HD 189733 and τ Boo A. Visit Stahl et al. 2021 to see the published paper.

If you have any questions, suggestions, or wish to report a bug, please let us know by either opening an issue or contacting us: Asa G. Stahl (asa.stahl@rice.edu) or Shih-Yun Tang (sytang@lowell.edu). More on how to contribute can be found in Q: How do I help make IGRINS RV better? page.

News:

  • 2022/05/23: IGRINS RV v1.0.1

    • No changes in the main code

    • What’s new?:

      1. Move stuff from the wiki page to the readthedocs site for version control

  • 2021/06/09: IGRINS RV v1.0.0 First Public Release!!

  • 2021/02/18: IGRINS RV v0.9.6-beta.3 public beta is ready for JOSS review!!
    (minor bugs related to example data fixed)

  • 2021/01/29: IGRINS RV v0.9.6-beta.1 public beta
    (update the ability to process IGRINS data at Gemini South)

  • 2020/12/05: IGRINS RV v0.9.5-beta.1 public beta is under internal review and testing!!
    (update with modeling the flux suppression effect)

  • 2020/08/04: IGRINS RV v0.9-beta.1 public beta is under internal review and testing!!

  • 2020/06/23: IGRINS RV v0.85 is under internal review.. will come to public soon!!

For the sake of efficiency, IGRINS RV is broken up into several different steps. After installed (see Installation) all the required packages, the best way to learn how these steps work is to follow our Demo with Example Data (GJ281) using the example data provided. The demo will demonstrate how one user might run the steps of IGRINS RV to go from raw data to final RV measurements.

Quick Start

As you go through the demo, navigate to the other document pages as they are linked to get a more detailed description of how each step works and why you’re running it. Once you’ve finished the demo and would like to begin analyzing your real science targets, these other pages will also explain what options you have for modifying the code’s default inputs to best suit the needs of your science:

Setup

Main RV program

Other

Please cite these papers if you use IGRINS RV: