Blind QSO reconstruction challenge: Exploring methods to reconstruct the Ly$alpha$ emission line of QSOs
Bradley Greig, Sarah E. I. Bosman, Frederick B. Davies, Dominika v{D}urovv{c}’ikov’a, Hassan Fathivavsari, Bin Liu, Romain A. Meyer, Zechang Sun, Valentina D’Odorico, Simona Gallerani, Andrei Mesinger, Yuan-Sen Ting
arXiv:2404.01556v1 Announce Type: new
Abstract: Reconstructing the intrinsic Ly$alpha$ line flux from high-$z$ QSOs can place constraints on the neutral hydrogen content of the intergalactic medium during reionisation. There are now $gtrsim10$ different Ly$alpha$ reconstruction pipelines using different methodologies to predict the Ly$alpha$ line flux from correlations with the spectral information redward of Ly$alpha$. However, there have been few attempts to directly compare the performance of these pipelines. Therefore, we devised a blind QSO challenge to compare these reconstruction pipelines on a uniform set of objects. Each author was provided de-identified, observed rest-frame QSO spectra with spectral information only redward of 1260AA rest-frame to ensure unbiased reconstruction. We constructed two samples of 30 QSOs, from X-Shooter and SDSS both spanning $3.5
Abstract: Reconstructing the intrinsic Ly$alpha$ line flux from high-$z$ QSOs can place constraints on the neutral hydrogen content of the intergalactic medium during reionisation. There are now $gtrsim10$ different Ly$alpha$ reconstruction pipelines using different methodologies to predict the Ly$alpha$ line flux from correlations with the spectral information redward of Ly$alpha$. However, there have been few attempts to directly compare the performance of these pipelines. Therefore, we devised a blind QSO challenge to compare these reconstruction pipelines on a uniform set of objects. Each author was provided de-identified, observed rest-frame QSO spectra with spectral information only redward of 1260AA rest-frame to ensure unbiased reconstruction. We constructed two samples of 30 QSOs, from X-Shooter and SDSS both spanning $3.5
2024-04-03
