The BINGO Project II: Instrument Description

Abstract

The measurement of diffuse 21-cm radiation from the hyperfine transition of neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers in single-dish telescopes is a challenging task. The BINGO (Baryon Acoustic Oscillations from Integrated Neutral Gas Observations) radio telescope is an instrument designed to detect baryonic acoustic oscillations (BAOs) in the cosmological HI signal, in the redshift interval $0.127\le z\le 0.449$. This paper describes the BINGO radio telescope, including the current status of the optics, receiver, observational strategy, calibration, and the site. BINGO has been carefully designed to minimize systematics, being a transit instrument with no moving dishes and 28 horns operating in the frequency range $980\le \nu \le 1260$ MHz. Comprehensive laboratory tests were conducted for many of the BINGO subsystems and the prototypes of the receiver chain, horn, polarizer, magic tees, and transitions have been successfully tested between 2018 - 2020. The survey was designed to cover $\sim 13\%$ of the sky, with the primary mirror pointing at declination $\delta =-15^{\circ }$. The telescope will see an instantaneous declination strip of $14.75^{\circ }$. The results of the prototype tests closely meet those obtained during the modeling process, suggesting BINGO will perform according to our expectations. After one year of observations with a $60\%$ duty cycle and 28 horns, BINGO should achieve an expected sensitivity of 102 $\mu K$ per 9.33 MHz frequency channel, one polarization, and be able to measure the HI power spectrum in a competitive time frame.

13 pages, accepted for publication in A&A

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Cited by in corpus (19)

• The BINGO Project I: Baryon Acoustic Oscillations from Integrated Neutral Gas Observations
• Constraints on the rotating self-dual black hole with quasi-periodic oscillations
• The BINGO Project VII: Cosmological Forecasts from 21cm Intensity Mapping
• The BINGO Project VI: HI Halo Occupation Distribution and Mock Building
• Prospects for measuring dark energy with 21 cm intensity mapping experiments
• The BINGO Project V: Further steps in Component Separation and Bispectrum Analysis
• The BINGO Project IV: Simulations for mission performance assessment and preliminary component separation steps
• The Tianlai dish array low-z surveys forecasts
• Cosmological Probes of Structure Growth and Tests of Gravity
• RHINO: A large horn antenna for detecting the 21cm global signal
• The BINGO Project IX: Search for Fast Radio Bursts -- A Forecast for the BINGO Interferometry System
• Cosmological constraints from low redshift 21 cm intensity mapping with machine learning
• The BINGO project VIII: On the recoverability of the BAO signal on HI intensity mapping simulations
• Testing synchrotron models and frequency resolution in BINGO 21 cm simulated maps using GNILC
• Analyzing the 21cm forest with Wavelet Scattering Transform: Insight into non-Gaussian features of the 21cm forest
• Expanded Generalized Needlet Internal Linear Combination (eGNILC) Framework for the 21-cm Foreground Removal
• The BINGO/ABDUS Project: Forecast for cosmological parameters from a mock Fast Radio Bursts survey
• Cosmological Forecasts from the Baryon Acoustic Oscillations in 21cm Intensity Mapping
• The BINGO project X. Cosmological parameter constraints from HI Intensity Mapping lognormal simulations