The interstellar medium is a complex 'ecosystem' with gas constituents in the
atomic, molecular, and ionized states, dust, magnetic fields, and relativistic
particles. The Canadian Galactic Plane Survey has imaged these constituents
with angular resolution of the order of arcminutes. This paper presents radio
continuum data at 408 MHz over the area 52 degrees < longitude < 193 degrees,
-6.5 degrees < latitude < 8.5 degrees, with an extension to latitude = 21
degrees in the range 97 degrees < longitude < 120 degrees, with angular
resolution 2.8' x 2.8' cosec(declination). Observations were made with the
Synthesis Telescope at the Dominion Radio Astrophysical Observatory as part of
the Canadian Galactic Plane Survey. The calibration of the survey using
existing radio source catalogs is described. The accuracy of 408-MHz flux
densities from the data is 6%. Information on large structures has been
incorporated into the data using the single-antenna survey of Haslam (1982).
The paper presents the data, describes how it can be accessed electronically,
and gives examples of applications of the data to ISM research.Comment: Accepted for publication in the Astronomical Journa
