Faint Images of the Radio Sky at Twenty Centimeters(FIRST) Data
Publish Time:2024-08-31
FIRST -- Faint Images of the Radio Sky at Twenty Centimeters -- is a project designed to produce the radio equivalent of the Palomar Observatory Sky Survey over 10,000 square degrees of the North and South Galactic Caps. Using the NRAO Very Large Array (VLA) and an automated mapping pipeline, we produce images with 1.8" pixels, a typical rms of 0.15 mJy, and a resolution of 5". At the 1 mJy source detection threshold, there are ~90 sources per square degree, ~35% of which have resolved structure on scales from 2-30". 30% of the sources have counterparts in the Sloan Digital Sky Survey. This mirror data set includes catalog and image. The image data is stored in two directories: "image/vla_first/data/" and "image/naro_first/". The first directory contains the complete data, while the second directory's data is more suitable for sharing and dissemination, as it is a subset of the first directory and can be completely replaced by the data in the "vla_first/data/" directory. The star catalog data is stored in the "catalog" directory.
· Data Access ·
♦Introduction♦
Keywords
Radio , Surveys , Stars , Galaxies
Data Volume
370451381419 Bytes
59061 files
♦Sub-datasets and Tables♦
♦Contact Author♦
Author
FIRST Group
Email
archive(at)stsci.edu
♦Contact Publisher
♦
Email
support(at)china-vo.org
Phone
+86-10-64807973
Institution
National Astronomical Data Center
♦Tags♦
waveband
Radio
telescope or project
Faint Images of the Radio Sky at Twenty-cm(FIRST)
subject
Cosmology and Galaxies
Star and Interstellar Matter
data type
Image Data
Catalog Data
Mirror Data
production age
1980-
content level
Research