HI Intensity Mapping with the MIGHTEE Survey: First Results of the HI Power Spectrum
Aishrila Mazumder; Laura Wolz; Zhaoting Chen; Sourabh Paul; Mario Santos; Matt Jarvis; Junaid Townsend; Srikrishna Sekhar · 2025 · arXiv
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Abstract (excerpt)
We present the first results of the HI intensity mapping power spectrum analysis with the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) survey. We use data covering $\sim$4 square degrees in the COSMOS field using a frequency range 962.5 MHz to 1008.42 MHz, equivalent to HI emission in $0.4<z<0.48$. The data consists of 15 pointings with a total of 94.2 hours on-source. We verify the suitability of the MIGHTEE data for HI intensity mapping by testing for residual systematics across frequency, baselines and pointings. We also vary the window used for HI signal measu
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Metadata source: arXiv