Performance of FAST with an Ultra-Wide Bandwidth Receiver at 500-3300 MHz

Abstract

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has been running for several years. A new Ultra-Wide Bandwidth (UWB) receiver, simultaneously covering 500-3300 MHz, has been mounted in the FAST feed cabin and passed a series of observational tests. The whole UWB band is separated into four independent bands. Each band has 1048576 channels in total, resulted in a spectral resolution of 1 kHz. At 500-3300 MHz, the antenna gain is around 14.3-7.7 K/Jy, the aperture efficiency is around 0.56-0.30, the system temperature is around 88-130 K, and the HPBW is around 7.6-1.6 arcmin. The measured standard deviation of pointing accuracy is better than ~7.9 arcsec, when zenith angle (ZA) is within 26.4deg. The sensitivity and stability of the UWB receiver are confirmed to satisfy expectation by spectral observations, e.g., HI and OH. The FAST UWB receiver already has a good performance for taking sensitive observations in various scientific goals.

11 pages, 7 figures, 2 tables, published in Research in Astronomy and Astrophysics

References in corpus (11)

• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• The Fundamental Performance of FAST with 19-beam Receiver at L Band
• A repeating fast radio burst associated with a persistent radio source
• A bimodal burst energy distribution of a repeating fast radio burst source
• The FAST Galactic Plane Pulsar Snapshot survey: I. Project design and pulsar discoveries
• An Early Transition to Magnetic Supercriticality in Star Formation
• Radio Frequency Interference Mitigation based on the ArPLS and SumThreshold Method
• Radio Frequency Interference Mitigation and Statistics in the Spectral Observations of FAST
• Peering into the Milky Way by FAST: II. Ionized gas in the inner Galactic disk revealed by the piggyback line observations of the FAST GPPS survey
• A 4-6 GHz Radio Recombination Line Survey in the Milky Way
• The atomic gas of star-forming galaxies at z$\sim$0.05 as revealed by the Five-hundred-meter Aperture Spherical Radio Telescope

Cited by in corpus (7)

• The FAST all sky HI survey (FASHI): The first release of catalog
• HiFAST: an HI data calibration and imaging pipeline for FAST
• HiFAST: An HI Data Calibration and Imaging Pipeline for FAST III. Standing Wave Removal
• Prospects for cosmological research with the FAST array: 21-cm intensity mapping survey observation strategies
• FASHI: An untargeted survey of the 21 cm HI absorption galaxies with FAST
• FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies
• FASHI: A search for extragalactic OH megamasers with FAST