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| FIRST survey | |
|---|---|
| Name | FIRST |
| Acronym | FIRST |
| Mission type | Astronomical survey |
| Wavelength | Radio, Far-infrared |
| Telescope type | Interferometric survey |
FIRST survey
The FIRST survey was a major astronomical sky survey conducted with radio and far-infrared facilities to map extragalactic sources and Galactic structure, producing extensive source catalogs used by researchers in observational cosmology, galaxy evolution, and star formation. Initiatives building on FIRST data intersected with projects at institutions such as Harvard-Smithsonian Center for Astrophysics, Max Planck Institute for Radio Astronomy, National Radio Astronomy Observatory, European Southern Observatory, and Space Telescope Science Institute and informed follow-up programs using facilities like Very Large Array, Atacama Large Millimeter/submillimeter Array, Herschel Space Observatory, Spitzer Space Telescope, and Chandra X-ray Observatory.
The project targeted high-resolution imaging over large sky areas to identify radio-loud active galactic nuclei, star-forming galaxies, and Galactic continuum sources, linking radio catalogs with optical and infrared surveys including Sloan Digital Sky Survey, Two Micron All-Sky Survey, Wide-field Infrared Survey Explorer, Galaxy Evolution Explorer, and Pan-STARRS. Objectives included constraining luminosity functions for quasar populations discovered in surveys like 2dF Galaxy Redshift Survey and mapping radio jets associated with sources studied by Hubble Space Telescope and Very Long Baseline Array. Collaborations involved research groups at California Institute of Technology, University of Cambridge, Imperial College London, Princeton University, Yale University, Columbia University, and University of Chicago.
Survey strategy combined interferometric observations with single-dish measurements from arrays and antennas maintained by organizations such as National Radio Astronomy Observatory, Jodrell Bank Observatory, Westerbork Synthesis Radio Telescope, and Australia Telescope National Facility. Instrumentation specifications referenced receiver systems developed at MIT Haystack Observatory, correlators influenced by designs from Joint Institute for VLBI ERIC, cryogenic front-ends similar to those used on Green Bank Telescope, and calibration schemes informed by standards at International Astronomical Union. Observing bands overlapped regimes probed by missions like Infrared Astronomical Satellite and Planck (spacecraft), enabling multiwavelength cross-identification with catalogs from Sloan Digital Sky Survey and spectroscopic samples from DEEP2 Galaxy Redshift Survey and VIMOS-VLT Deep Survey.
Observation campaigns were scheduled to optimize coverage in coordination with time allocation committees at facilities associated with National Radio Astronomy Observatory, European Southern Observatory, and Space Telescope Science Institute. Raw visibilities were processed using software systems derived from packages at Astronomical Image Processing System, Common Astronomy Software Applications, and analysis pipelines influenced by projects at Harvard & Smithsonian and Max Planck Institute for Astrophysics. Calibration used flux density scales tied to standards observed by Perley–Butler flux scale teams, and imaging employed deconvolution algorithms related to CLEAN implementations pioneered at NRAO. Quality assessment referenced methodologies from surveys like FIRST (Faint Images of the Radio Sky at Twenty-Centimeters) predecessors and cross-checks with datasets from NVSS and SUMSS.
Public data releases included source catalogs, image mosaics, spectral index maps, and value-added cross-match tables integrating identifiers from Sloan Digital Sky Survey, Two Micron All-Sky Survey, Wide-field Infrared Survey Explorer, and X-ray associations from Chandra X-ray Observatory and XMM-Newton. Data formats adhered to standards advocated by International Virtual Observatory Alliance and were accessible through archives maintained by NASA/IPAC Infrared Science Archive, European Space Agency, and institutional repositories at Harvard-Smithsonian Center for Astrophysics. Derived products supported spectroscopic follow-up programs using telescopes like Keck Observatory, Very Large Telescope, Subaru (telescope), and Gemini Observatory.
Analyses produced constraints on radio luminosity functions for radio galaxy and quasar populations, contributing to studies of feedback processes in galaxies observed with Hubble Space Telescope and ALMA. Cross-matched samples enabled measurement of star-formation rates in luminous infrared galaxy samples identified by Spitzer Space Telescope and Herschel Space Observatory, and investigations of active galactic nucleus demographics compared with findings from SDSS spectroscopic catalogs and X-ray surveys by Chandra X-ray Observatory. The survey informed large-scale structure studies connected to results from Baryon Oscillation Spectroscopic Survey and contributed to lensing and clustering analyses used by teams at Planck (spacecraft) and Dark Energy Survey. Studies leveraging the catalogs addressed radio source morphology taxonomy building on work from Fanaroff–Riley classification and jet physics studied in conjunction with Very Long Baseline Array campaigns.
The legacy included widely used reference catalogs that supported research at institutions such as Harvard University, Princeton University, University of Cambridge, Max Planck Society, and California Institute of Technology; spinoff projects and archival science continue to enable discoveries by teams at European Southern Observatory, National Radio Astronomy Observatory, and Space Telescope Science Institute. The survey informed design considerations for next-generation facilities like Square Kilometre Array and motivated multiwavelength synergy in programs involving James Webb Space Telescope, ALMA, and future radio surveys by Next Generation Very Large Array. Training of early-career researchers led to career placements at organizations including NASA, European Space Agency, and major universities worldwide.
Category:Astronomical surveys