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1NASA Technical Reports Server (NTRS) 20020039047: Continuum Fitting HST QSO Spectra
By NASA Technical Reports Server (NTRS)
The Principal Component Analysis (PCA) method which we are using to fit and describe QSO spectra relies upon the fact that QSO continuum are generally very smooth and simple except for emission and absorption lines. To see this we need high signal-to-noise (S/N) spectra of QSOs at low redshift which have relatively few absorption lines in the Lyman-a forest. We need a large number of such spectra to use as the basis set for the PCA analysis which will find the set of principal component spectra which describe the QSO family as a whole. We have found that too few HST spectra have the required S/N and hence we need to supplement them with ground based spectra of QSOs at higher redshift. We have many such spectra and we have been working to make them suitable for this analysis. We have concentrated on this topic since 12/15/01.
“NASA Technical Reports Server (NTRS) 20020039047: Continuum Fitting HST QSO Spectra” Metadata:
- Title: ➤ NASA Technical Reports Server (NTRS) 20020039047: Continuum Fitting HST QSO Spectra
- Author: ➤ NASA Technical Reports Server (NTRS)
- Language: English
“NASA Technical Reports Server (NTRS) 20020039047: Continuum Fitting HST QSO Spectra” Subjects and Themes:
- Subjects: ➤ NASA Technical Reports Server (NTRS) - CONTINUOUS SPECTRA - CONTINUUMS - LINE SPECTRA - QUASARS - SPECTRUM ANALYSIS - FITTING - RED SHIFT - SIGNAL TO NOISE RATIOS - Tytler, David
Edition Identifiers:
- Internet Archive ID: NASA_NTRS_Archive_20020039047
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The book is available for download in "texts" format, the size of the file-s is: 4.33 Mbs, the file-s for this book were downloaded 43 times, the file-s went public at Wed Oct 19 2016.
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