M31 Data Products

Download Cubes, Maps, and Catalogs

Data Releases

Currently Not Released

HI Data Cubes

The primary data product is the 3D HI data cube covering the M31 halo.

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M31 HI Data Cube
FITS cube | Currently Not Released
Download
Currently Not Released: Data cubes are currently restricted to project members. For research collaboration or specific spectra requests, please contact the PI.

Moment Maps

Moment maps derived from the data cube:

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Moment 0 - Integrated Intensity
FITS image | Total HI column density | Currently Not Released
Download
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Moment 1 - Velocity Field
FITS image | Mean line-of-sight velocity | Currently Not Released
Download
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Moment 2 - Velocity Dispersion
FITS image | Velocity dispersion | Currently Not Released
Download

High-Velocity Cloud Catalog

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M31 HVC Catalog
FITS table | Ongoing
Download

Background HI Sources

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Background HI Source Catalog
FITS/CSV format | Extra-galactic sources | Ongoing
Download
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HI Spectra of Background Sources
FITS format | 1D extracted spectra | Ongoing
Contact PI

Data Policy

Usage Rights

For data that has not yet been released, the M31 survey data policy is currently under discussion. Project members have priority access to the data products.

Citation Requirements

If you use M31 data in your research, please cite the following papers:

Relevant M31 papers
See the Publication page.

HiFAST pipeline papers:
Jing et al. 2024; Liu et al. 2024; Xu et al. 2025; Chen et al. 2026

Acknowledgment Text

Additionally, please acknowledge the FAST telescope and the CCG group in your publications using the template below:

Acknowledgement Template

This work made use of the data from FAST (Five-hundred-meter Aperture Spherical radio Telescope) (https://cstr.cn/31116.02.FAST). FAST is a Chinese national mega-science facility, operated by National Astronomical Observatories, Chinese Academy of Sciences. We acknowledge the support from the FAST-M31 survey team (Computational Cosmology Group, NAOC). The M31 survey data were reduced using the HiFAST pipeline.

Data Access Questions

For questions about data products, format, or access issues, please contact PI or visit our people page.