Open Access Publications from the University of California

## Constraints on Short Lived Signals at 150 GHz

• Author(s): Harrington, Nicholas Lee
Fast radio bursts (FRBs) are bright, millisecond flashes of radio radiation detected at frequencies between 800 MHz and 8 GHz. We present the first rate constraints on millisecond duration celestial transients like FRBs at 150 GHz. Using a year of data from the South Pole Telescope we searched for signals with a similar phenomenology at 150 GHz and found no evidence for a celestial population. The 0.9 upper confidence limit is $1.1 \times 10^{5} \text{sky}^{-1}\text{ day}^{-1}$ for 1 ms signals with fluence above 10 Jy ms. The search sensitivity is expected to increase dramatically with future microwave telescopes due to increases in spectral information and a reduced background rate.