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

The M31 survey data policy is currently under discussion. Project members have priority access to the data products.

Citation Requirements

Publications using M31 survey data should cite the following papers:

  • HiFAST pipeline papers (Jing et al. 2024; Liu et al. 2024; Xu et al. 2025; Chen et al. 2026)
  • Relevant M31 paper

Acknowledgment Text

"This research made use of data from the FAST M31 Survey, conducted by the CCG group. The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is a national major science research facility in China, operated by the 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.