MeerFish

A Fisher forecast code focusing on upcoming large-sky single-dish HI intensity mapping cosmological surveys with MeerKAT and its successor the SKAO.

• "Meer" is Afrikaans for "more", KAT is the Karoo Array Telescope
  To survey the Universe at radio wavelengths we have MeerKAT
  For providing updated Fisher forecasts we have MeerFish

Getting started:

Git clone this repo: git clone https://github.com/meerklass/MeerFish.git

We then recommend going through the notebook in demo/getting_started.ipynb

Please refer to the notes in Appendix A of https://arxiv.org/abs/2510.27549 for some detailed formalism covering these codes.

Code developers:

Steve Cunnington

Credit:

If you use these codes in your research, we kindly ask that you cite this repository [https://github.com/meerklass/MeerFish] and the accompanying paper Revealing cosmological fluctuations in 21cm intensity maps with MeerKLASS: from maps to power spectra (arXiv reference below):

[https://arxiv.org/abs/2510.27549]

Contact:

For any questions or comments please contact:
Steve Cunnington [steve.cunnington@port.ac.uk]

Feel free to alternatively raise any bug reports by opening a New issue from the Issues tab.