BURSTT: Bustling Universe Radio Survey Telescope for Taiwan

Abstract

Fast Radio Bursts (FRBs), bright millisecond-duration radio transients are happening thousands of times per day. FRBs' astrophysical mechanisms are still puzzling. Bustling Universe Radio Survey Telescope for Taiwan (BURSTT) is optimized to discover and localize a large sample of bright and nearby FRBs. BURSTT will have a large field-of-view (FoV) of ∼10 4 deg 2 for monitoring the whole visible sky all the time, a 400 MHz effective bandwidth between 300-800 MHz, and the sub-arcsecond localization capability with several outrigger stations hundreds to thousands of km away. Initially, BURSTT will equip with 256 antennas, which we will test different designs and improve the system performance. Through the scalable features, BURSTT could equip with more antennas and eventually optimized designs. We expect that BURSTT initially would detect and localize ∼100 bright (≥100 Jy ms) and nearby FRBs per year to sub-arcsecond precision. Besides, the large FoV yields monitoring FRBs with high cadence, which is crucial to understanding the repetition of FRBs. Multi-

Stellar prospects for FRB gravitational lensing

“…An ultra-widefield FRB survey, which observes a similar region of sky at all times, will be able to search for lensing delays up to the survey duration. We refer to such surveys as coherent all-sky monitors, or CASMs, of which the proposed experiment BURSTT is an example (Lin et al 2022). However, such a design will inevitably be less sensitive than DSA-2000 or CHORD and will therefore probe a more nearby population of FRBs.…”

“…There is at least one proposed FRB survey that falls within the dense aperture array design. The Bustling Universe Radio Survey Telescope in Taiwan (BURSTT) is an example of a coherent all-sky monitor that would have a high FRB detection rate and outriggers for localization (Lin et al 2022). It has been considered explicitly in the context of coherent gravitational lensing.…”

“…Outrigger stations will provide VLBI localizations that will enable new applications of FRB gravitational lensing by massive galaxies. BURSTT-2048 is expected to have an SEFD of 600 Jy and will spend a significant portion of its time near the north celestial pole (Lin et al 2022).…”

“…We first offer a basic formalism for gravitational lensing in the time domain and calculate lensing optical depths at different mass scales. We then forecast total FRB detection rates on DSA-2000 (Hallinan et al 2019), CHORD (Vanderlinde et al 2019), and a coherent all-sky monitor (for example, BURSTT (Lin et al 2022) 1 ), finding they will detect tens of thousands of new FRBs. We combine these rates and their modelled redshift distributions with lensing optical depths to estimate the number of gravitationally lensed FRBs that will be detected on a range of timescales.…”

Detecting Cosmic Strings with Lensed Fast Radio Bursts

“…SKA Phase 2 will provide the best sensitivity owing to its large collecting area, while CHORD and DSA are also expected to detect a large number of FRBs. Bustling Universe Radio Survey Telescope for Taiwan (BURSTT) [60] will also detect ∼ 10 4 FRBs per year owing to its large field of view and Packed Ultra-wideband Mapping Array (PUMA) [61] can even reach a similar sensitivity to SKA-2. It is worth noting that none of these existing surveys are ideal for detecting as many FRBs as possible since the field of view is not wide enough.…”