CRAFTS for Fast Radio Bursts Extending the dispersion-fluence relation with new FRBs detected by FAST

Understand

We report three new FRBs discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), namely FRB 181017.J0036+11, FRB 181118 and FRB 181130, through the Commensal Radio Astronomy FAST Survey (CRAFTS).

• Together with FRB 181123 that was reported earlier, all four FAST-discovered FRBs share the same characteristics of low fluence ($\leq$0.2 Jy ms) and high dispersion measure (DM, $>1000$ \dmu), consistent with the anti-correlation between DM and fluence of the entire FRB population.
• FRB 181118 and FRB 181130 exhibit band-limited features.
• FRB 181130 is prominently scattered ($\tau_s\simeq8$ ms) at 1.25 GHz.