Story perspectives

FAST Releases FASHI Data, Building Largest Extragalactic HI Catalogue

By Drooid · Sep 13, 2026, 2:43 PM UTC · How we work

Summary

Story summary

FAST released the second batch of FASHI data, creating the largest extragalactic neutral hydrogen catalogue.
The FASHI catalogue lists 156,411 extragalactic sources, nearly five times Arecibo’s total detections.
FASHI surveyed about three times more sky than Arecibo’s ALFALFA survey (2005-2012).
Researchers called the release a legacy dataset that prepares the community for the Square Kilometre Array.

1 of 1

Story summary

FAST released the second batch of FASHI data, creating the largest extragalactic neutral hydrogen catalogue.
The FASHI catalogue lists 156,411 extragalactic sources, nearly five times Arecibo’s total detections.
FASHI surveyed about three times more sky than Arecibo’s ALFALFA survey (2005-2012).
Researchers called the release a legacy dataset that prepares the community for the Square Kilometre Array.