| Name: | Sujay Mate |
| Affiliation: | Tata Insititute of Fundamental Research Mumbai |
| Conference ID : | ASI2024_681 |
| Title : | Searching for second-timescale radio transients with CHIME telescope |
| Authors : | Sujay Mate 1, Shriharsh Tendulkar 1, Arvind Balasubramanian 1, Ziggy Pleunis 2, Paul Scholz 3, Yash Bhusare 4, Kevin Luke 5 |
| Authors Affiliation: | 1. Tata Institute of Fundamental Research, Mumbai - 400005, India
2. Dunlap Institute for Astronomy and Astrophysics, Toronto - M5S 3H4, Canada
3. York University, Toronto - M3J 1P3, Canada
4. National Centre for Radio Astrophysics, Pune-411007, India
5. St. Xavier's Autonomous, Mumbai - 400001, India |
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a transit radio telescope operating across 400 - 800 MHz with a field of view of ~ 200 sq. degrees. The telescope has been regularly detecting Fast Radio Bursts using the CHIME/FRB system. The sensitivity of CHIME/FRB reduces with larger pulse widths due to the current design of its radio frequency interference (RFI) removal algorithms, making it challenging to detect bursts with widths > 50 ms. Hence, slower duration transients are as-yet unexplored and open parameter space. Possible sources for such radio transients could include flaring stars, compact binaries, radio counterparts of binary neutron star mergers or GRBs. In the talk, I will present our transient search pipeline developed to detect slower duration radio transients (50 ms - 5 seconds) in the CHIME data and discuss results obtained from a pilot survey. The pipeline makes use of well-established tools and algorithms such as PRESTO, HDBSCAN and FETCH for RFI cleaning, single-pulse search and event classification. The novel setup is designed from inception to have a built-in system to inject simulated pulses (sampled across DM, fluence and pulse width parameter space) in the real data and recover them using the pipeline. The statistics from the injection system are used to optimise the detection efficiency of the RFI removal algorithm, measure the false alarm rate, and measure the detection completeness of the pipeline. The pipeline will be deployed to detect slow radio transients in the data gathered for the CHIME Slow Pulsar Search project. |
