extended source


Also found in: Medical.

extended source

[ik′stend·əd ′sȯrs]
(astronomy)
A radio source that has a large angular extent and is strongest at longer wavelengths, as distinguished from a compact source.
(optics)
A source of radiation that can be resolved by the eye or a specified instrument into a geometrical image.
References in periodicals archive ?
The mine maintains a large stockpile downstream from the crusher, serving as both a surge pile during normal operations and an extended source of plant feed when mining operations are interrupted.
A spectrum of an extended source covering the entire visible range (say, 350-700 nm) could be obtained with an iFTS without the use of a filter, the only constraints being the optics transmission and the detector's quantum efficiency (which, in this wavelength range, are both excellent).
Apart from N source nodes and M syndromes as in usual scheme, there are L numbers of extended source nodes called parity nodes and extended syndrome nodes for rate adaption.
Describing in detail the process of party funding during the transition period (1990-2001) and being itself an extended source of information that can explain the current political situation in the above-mentioned countries the volume can be, very helpful for academic researchers, students and practitioners.
The article's scholarship is traditional in style, giving little attention to questions of historiography, but the translation is excellent, making it a useful extended source for the more advanced undergraduate.
The reference lamp, which was used to obtain the spectral response correction is an extended source, while the orange glass spectrum was taken for a line source (the laser beam is focused inside the cuvette).
Among the site's tools is the 2MASS Extended Source Image Server.
External as well as internal evidence supports the fact that Aphra Behn had at hand a copy of the 1675 edition of La Rochefoucauld's Maximes, the fourth of the five authorized versions and the first to contain 413 maxims; indeed the epigram: |Nos vertus ne sont le plus souvent, que des vices cachez' first appeared in this fourth edition (1675) while the following Maxime which is its extended source:
Having carefully examining the supernova's belated radio emissions, the Australian team concludes that the signals come from an extended source surrounding the explosion site, rather than from a compact object such as a central pulsar.
The theoretical prediction of the behavior of transient waves for arbitrary extended source distributions in space and time can be obtained once the time-domain dynamic Green's tensor is known.
In addition, the exhaust plume of a jet engine is an extended source target of constant duration and intensity, while flares are point sources of very short duration, perhaps 1-1.5 sec.
Abbas, "Direct mathematical method for calculating full-energy peak efficiency and coincidence corrections of HPGe detectors for extended sources," Nuclear Instruments and Methods in Physics Research Section B, vol.

Full browser ?