uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Geometrical model fitting for interferometric data: GEM-FIND
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
Show others and affiliations
2012 (English)In: Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 2012, Vol. 8445Conference paper (Refereed)
Abstract [en]

We developed the tool GEM-FIND that allows to constrain the morphology and brightness distribution of ob- jects. The software fits geometrical models to spectrally dispersed interferometric visibility measurements in the N-band using the Levenberg-Marquardt minimization method. Each geometrical model describes the bright- ness distribution of the object in the Fourier space using a set of wavelength-independent and/or wavelength- dependent parameters. In this contribution we numerically analyze the stability of our nonlinear fitting approach by applying it to sets of synthetic visibilities with statistically applied errors, answering the following questions: How stable is the parameter determination with respect to (i) the number of uv-points, (ii) the distribution of points in the uv-plane, (iii) the noise level of the observations?

Place, publisher, year, edition, pages
2012. Vol. 8445
, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-196849DOI: 10.1117/12.925881OAI: oai:DiVA.org:uu-196849DiVA: diva2:610951
Society of Photo-Optical Instrumentation Engineers 4135 (SPIE) Conference
Available from: 2013-03-13 Created: 2013-03-13 Last updated: 2013-03-13

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Theoretical Astrophysics
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 474 hits
ReferencesLink to record
Permanent link

Direct link