Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model

Details Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012exa....33..211z&link_type=abstract

Experimental Astronomy, Volume 33, Issue 1, pp.211-223

Astronomy and Astrophysics

Astronomy

Lamost, Spectrum Extraction, Fiber Spectra, 2-D Point-Spread Function (Psf), 2-D Exponential Polynomial

Scientific paper

A spectrum extraction method based on a two-dimensional (2-D) exponential polynomial model is proposed in this paper. It is presented for extracting the flux of the fiber spectrum from a two-dimensional image observed by Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST). Due to the effects of the environments and the instruments, centers of the fiber spectra deviate from the ideal, and the energy is expanded to the neighbors in the form of a point-spread function (PSF) in two dimensions. Thus we use a 2-D model to fit the PSF. In spatial orientation and wavelength orientation, the flat-field images and the calibration lamp images are respectively used to evaluate the parameters of the 2-D exponential polynomial model. With the 2-D exponential polynomial model, the spectrum flux is extracted based on the least square theory. The experiments are processed through simulated profiles to demonstrate the effectiveness of the proposed algorithm. Especially, its superiority of restraining noise and fitting asymmetric fiber profiles is proved.

Affiliated with

Also associated with

No associations

Rating

Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model 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 Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fiber spectrum extraction for LAMOST based on 2-D exponential polynomial model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1558752