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2 votes
2 answers
366 views

Reduced chi square value

I am currently plotting a continuum of observed data. I need to check the effectiveness of the fitted continuum with the reduced chi-square method. Ideally, should the reduced chi-square value ...
summer's user avatar
  • 31
2 votes
1 answer
183 views

How to convert spectra to log-wavelength and interpolate them into linear spacing in log-wavelength

I want to write a function that cross correlates a spectrum with a quasar template I’d like to ask you how can I convert my flux density vs wavelength spectrum to log-wavelength. It’s not clear to me ...
Q Wolf's user avatar
  • 23
4 votes
2 answers
176 views

How to interpret this spectrum of the "new DESI Quasar at z = 6.53"; what causes the big edge at about 9150 Angstroms?

I'm not exacty sure why but Scitech Daily's Seeing Dark Energy’s True Colors: DESI Creates Largest 3D Map of the Cosmos includes the graphic and caption below. It indicates a quasar in a Hubble image ...
uhoh's user avatar
  • 30.7k