Articles written in Journal of Astrophysics and Astronomy
Volume 43 All articles Published: 15 December 2022 Article ID 0099 ORIGINAL RESULTS
Detecting galaxies in a large H
ABINASH KUMAR SHAW MANOJ JAGANNATH AISHRILA MAZUMDER ARNAB CHAKRABORTY NARENDRA NATH PATRA RAJESH MONDAL SAMIR CHOUDHURI
The upcoming square kilometer array (SKA) is expected to produce humongous amount of data for undertaking H
Volume 44 All articles Published: 13 March 2023 Article ID 0019 TECHNICAL REVIEW
Synthetic observations with the Square Kilometre Array: Development towards an end-to-end pipeline
AISHRILA MAZUMDER ABHIRUP DATTA MAYURI SATHYANARAYANA RAO ARNAB CHAKRABORTY SAURABH SINGH ANSHUMAN TRIPATHI MADHURIMA CHOUDHURY
Detection of the redshifted 21-cm signal of neutral hydrogen from the cosmic dawn and the epoch of reionization (EoR) is one of the final frontiers of modern observational cosmology. The inherently faint signal makes it susceptible to contamination by several sources like astrophysical foregrounds and instrumental systematics. Nevertheless, developments achieved in the recent developments will combine to make signal detection possible with the upcoming Square Kilometer Array (SKA), both statistically and via tomography.This review describes an indigenously developed end-to-end pipeline that simulates sensitive interferometric observations. It mainly focuses on the requirements for Hi detection in interferometers. In its present form, it canmimic the effects of realistic point source foregrounds and systematics—calibration error and position error on 21-cm observations. The performance of the pipeline is demonstrated for test cases with 0.01% calibration errorand position error. Its performance is consistent across telescope, foreground and signal models. The focus of the simulation pipeline during the initial stages was for EoR science. But since this is a general interferometric simulation pipeline, it will be helpful to the entire SKA user community, irrespective of the science goals.
Volume 44, 2023
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