Back to Search
Start Over
Correlation-based Beam Calibration of 21cm Intensity Mapping
- Publication Year :
- 2024
-
Abstract
- Foreground removal presents a significant obstacle in both current and forthcoming intensity mapping surveys. While numerous techniques have been developed that show promise in simulated datasets, their efficacy often diminishes when applied to real-world data. A primary issue is the frequency-dependent variations in the instrumental response. In this paper, we propose a novel approach utilizing the internal cross-correlation among different frequencies to calibrate the beam's frequency fluctuations. Using a simulated dataset that incorporates frequency-dependent random fluctuations into the beam model, we illustrate that our method can achieve considerable improvements over traditional techniques. Our results represent a step forward in enhancing the precision and reliability of foreground removal in intensity mapping surveys.<br />Comment: Accepted for publication in ApJS
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2408.06682
- Document Type :
- Working Paper