HD² Data Products

Download Catalogs, Spectra, and Images

Data Releases

To be determined
Release Date Coverage Description
PDR (z < 0.09) Soon 10 deg² pilot data release
DR1 Planned 100 deg² Y1+Y2 shallow
DR2 Planned 100 deg² Planned

Source Catalogs

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HD2 PDR Source Catalog
FITS format | See Xu et al. (2026) for details
Download

HI Spectra

The calibrated HI spectra for individual sources from the HD² survey are available upon reasonable request to the Principal Investigator (PI).

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HD2 PDR HI Spectra
FITS format | 1D extracted spectra
Contact PI
Note: When requesting data, please provide a brief description of your scientific project and the specific sources or regions of interest.

Data Policy

Usage Rights

The HD² survey data policy is currently under discussion. In principle, survey members have priority access to the data for scientific analysis and publication.

Citation Requirements

If you use HD2 data in your research, please cite the following papers (PDR and DR1):

Pilot Data Release (PDR) Paper:
Chen Xu, Yingjie Jing, Jie Wang, et al., "The FAST Hundred-Deg² HI Deep (HD²) Survey: Early Results from the Pilot Survey"

First Data Release (DR1) Paper:
Paper details coming soon (DR1 paper).

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-HD² survey team (Computational Cosmology Group, NAOC). The HD² 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.