Exoplaneteers Keep Calling Plots "Allan Variance" Plots When They Aren't
Fuente:
arXiv
Enregistré dans:
| Auteur principal: | |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866908413032660992 |
|---|---|
| author | Kipping, David |
| author_facet | Kipping, David |
| contents | I highlight that there is a substantial number of papers (at least 11 published since 2024) which all refer to a specific type of plot as an "Allan variance" plot, when in fact they seem to be plotting the standard deviation of the residuals versus bin size. The Allan variance quantifies the stability of a time series by calculating the average squared difference between successive time-averaged segments over a specified interval; it is not equivalent to the standard deviation. This misattribution seems particularly prolific in the exoplanet transit spectroscopy community. However, I emphasize that it does not impact the scientific analyses presented in those works. I discuss where this confusion seems to stem from and encourage the community to ensure statistical measures are named correctly to avoid confusion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_13238 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exoplaneteers Keep Calling Plots "Allan Variance" Plots When They Aren't Kipping, David Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics I highlight that there is a substantial number of papers (at least 11 published since 2024) which all refer to a specific type of plot as an "Allan variance" plot, when in fact they seem to be plotting the standard deviation of the residuals versus bin size. The Allan variance quantifies the stability of a time series by calculating the average squared difference between successive time-averaged segments over a specified interval; it is not equivalent to the standard deviation. This misattribution seems particularly prolific in the exoplanet transit spectroscopy community. However, I emphasize that it does not impact the scientific analyses presented in those works. I discuss where this confusion seems to stem from and encourage the community to ensure statistical measures are named correctly to avoid confusion. |
| title | Exoplaneteers Keep Calling Plots "Allan Variance" Plots When They Aren't |
| topic | Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2504.13238 |