FAST discovery of an FRB in the POP survey

ATel #17800; Y. C. Zhang(NAOC), L. Qian(NAOC), M. Zhu(NAOC), P. Jiang(NAOC), G. Y. Zhang(NAOC), L. Y. Wang(NAOC), X. Y. Zhang(NAOC), Z. Pan(NAOC)
on 14 May 2026; 15:33 UT
Credential Certification: Lei Qian (lqian@nao.cas.cn)

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We report the detection of a single pulse from a new fast radio burst (FRB) source using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Designated as DFC001 (short for drift-scan FRB candidate), the pulse was identified by a TrensientX-based single-pulse search pipeline on 2026 March 30, in the POP (Piggyback Observation of Pulsars, https://fast.bao.ac.cn/cms/article/2034282224688386050) survey archival data taken on 2024 May 19 (MJD 60449.100143131, 2024-05-19 10:24:12.366 UTC). The observation used the 19-beam L-band receiver (1.05-1.45 GHz), dual linear polarizations, 1024 frequency channels, and a sampling time of 196.608 \mu s. Assuming the source was in the beam center at the pulse arrival time, the coordinate is RA (J2000) = 01:19:06.76 and Dec (J2000) = -12:07:35.5. The dispersion measure (DM) is 1846.7 pc cm^-3.The pulse width is 3.7 ms, with a signal-to-noise ratio of 22.0. Using the YMW16 model, the maximum Galactic DM along this line of sight is 21 pc cm^-3, confirming an extragalactic origin. The inferred distance with the YMW16 model is 5.6 Gpc. A follow-up tracking observation was conducted on 2026-04-28 for one hour by FAST. No pulse or periodic signal was detected, suggesting that DFC001 may be non-repeating. Further observations may be conducted in the future. 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 the National Astronomical Observatories, Chinese Academy of Sciences. Please send email to L. Qian (lqian@nao.cas.cn) and Z. Pan (panzc@bao.ac.cn) for further information.