A multi-scale, multi-wavelength source extraction method: getsources

Details A multi-scale, multi-wavelength source extraction method: getsources A multi-scale, multi-wavelength source extraction method: getsources

2012-04-20

arxiv.org/abs/1204.4508v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

31 pages, 27 figures, to be published in Astronomy & Astrophysics

Scientific paper

We present a multi-scale, multi-wavelength source extraction algorithm called getsources. Although it has been designed primarily for use in the far-infrared surveys of Galactic star-forming regions with Herschel, the method can be applied to many other astronomical images. Instead of the traditional approach of extracting sources in the observed images, the new method analyzes fine spatial decompositions of original images across a wide range of scales and across all wavebands. It cleans those single-scale images of noise and background, and constructs wavelength-independent single-scale detection images that preserve information in both spatial and wavelength dimensions. Sources are detected in the combined detection images by following the evolution of their segmentation masks across all spatial scales. Measurements of the source properties are done in the original background-subtracted images at each wavelength; the background is estimated by interpolation under the source footprints and overlapping sources are deblended in an iterative procedure. In addition to the main catalog of sources, various catalogs and images are produced that aid scientific exploitation of the extraction results. We illustrate the performance of getsources on Herschel images by extracting sources in sub-fields of the Aquila and Rosette star-forming regions. The source extraction code and validation images with a reference extraction catalog are freely available.

Affiliated with

Also associated with

No associations

Rating

A multi-scale, multi-wavelength source extraction method: getsources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A multi-scale, multi-wavelength source extraction method: getsources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A multi-scale, multi-wavelength source extraction method: getsources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-5102