The FAST Ultra-Deep Survey (FUDS): observational strategy, calibration and data reduction

Abstract

The FAST Ultra-Deep Survey (FUDS) is a blind survey that aims for the direct detection of HI in galaxies at redshifts $z<0.42$. The survey uses the multibeam receiver on the Five Hundred Meter Aperture Spherical Telescope (FAST) to map six regions, each of size 0.72 deg${}^2$ at high sensitivity ($\sim 50\mu$Jy) and high frequency resolution (23 kHz). The survey will enable studies of the evolution of galaxies and their HI content with an eventual sample size of $\sim 1000$. We present the science goals, observing strategy, the effects of radio frequency interference (RFI) at the FAST site, our mitigation strategies and the methods for calibration, data reduction and imaging as applied to initial data. The observations and reductions for the first field, FUDS0, are completed, with around 128 HI galaxies detected in a preliminary analysis. Example spectra are given in this paper, including a comparison with data from the overlapping GAL2577 field of Arecibo Ultra-Deep Survey (AUDS).

arXiv comment17 pages, 19 figures, 6 tables, accepted for publication in PASA

References in corpus (33)

• Astropy: A Community Python Package for Astronomy
• The Star Formation History of Field Galaxies
• The CANADA-FRANCE REDSHIFT SURVEY XIII: The luminosity density and star-formation history of the Universe to z ~ 1
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• The VLA Low-frequency Sky Survey
• The HIPASS catalogue: Omega_HI and environmental effects on the HI mass function of galaxies
• Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation
• On the (Non)Evolution of HI Disks over Cosmic Time
• The Arecibo Legacy Fast ALFA Survey: X. The HI Mass Function and Omega_HI From the 40% ALFALFA Survey
• Discovery of Damped Lyman-Alpha Systems at Redshifts Less Than 1.65 and Results on their Incidence and Cosmological Mass Density
• The ALFALFA HI mass function: A dichotomy in the low-mass slope and a locally suppressed 'knee' mass
• Near-Infrared and Optical Luminosity Functions from the 6dF Galaxy Survey
• Detection of HI in distant galaxies using spectral stacking
• The Arecibo Dual-Beam Survey: The HI Mass Function of Galaxies
• HIGHz: A Survey of the Most HI-Massive Galaxies at z~0.2
• A New 1.4GHz Radio Continuum Map of the Sky South of Declination +25 deg
• The busy function: a new analytic function for describing the integrated 21-cm spectral profile of galaxies
• Morphology, Environment, and the HI Mass Function
• Galaxy And Mass Assembly (GAMA): The dependence of the galaxy luminosity function on environment, redshift and colour
• The Parkes HI Zone of Avoidance Survey
• An HI Survey of Six Local Group Analogs. II. HI properties of group galaxies
• Hydrogen 21-Centimeter Emission from a Galaxy at Cosmological Distance
• Environmental dependence of the HI mass function in the ALFALFA 70% catalogue
• The HI Mass Function and Velocity Width Function of Void Galaxies in the Arecibo Legacy Fast ALFA Survey
• HI in Abell 3128
• The HI Parkes Zone of Avoidance Survey: the Northern Extension
• Spectroscopic Confusion: Its Impact on Current and Future Extragalactic HI Surveys
• The evolution of neutral hydrogen over the past 11 Gyr via HI 21 cm absorption
• The Arecibo Ultra-Deep Survey
• The HI mass function in the Parkes HI Zone of Avoidance survey
• The ALFALFA HI velocity width function
• The Ursa Major Association of Galaxies. VI: A relative dearth of gas-rich dwarf galaxies
• Bivariate luminosity-HI mass distribution function of galaxies based on the NIBLES survey

Cited by in corpus (7)

• Deep Investigation of Neutral Gas Origins (DINGO): HI stacking experiments with early science data
• The most distant HI galaxies discovered by the 500 m dish FAST
• HI content of massive red spiral galaxies observed by FAST
• HiFAST : An HI Data Calibration and Imaging Pipeline for FAST II. Flux Density Calibration
• HiFAST: An HI Data Calibration and Imaging Pipeline for FAST III. Standing Wave Removal
• FAST Ultra-Deep Survey (FUDS): Data Release for FUDS0
• The FAST Hundred-Deg${}^2$ HI Deep (HD${}^2$) Survey: Early Results from the Pilot Survey