Deep Neural Networks for estimation of gamma-ray burst redshifts

Tamador Aldowma, Soebur Razzaque

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

While the available set of gamma-ray burst (GRB) data with known redshift is currently limited, a much larger set of GRB data without redshift is available from different instruments. This data includes well-measured prompt gamma-ray flux and spectral information. We estimate the redshift of a selection of these GRBs detected by Fermi-GBM and Konus-Wind using machine learning techniques that are based on spectral parameters. We find that Deep Neural Networks with Random Forest models employing non-linear relations among input parameters can reasonably reproduce the pseudo-redshift distribution of GRBs, mimicking the distribution of GRBs with spectroscopic redshift. Furthermore, we find that the pseudo-redshift samples of GRBs to satisfy (i) Amati relation between the peak photon energy of the time-averaged energy spectrum in the cosmological rest frame of the GRB Ei,p and the isotropic-equivalent radiated energy Eiso during the prompt phase; and (ii) Yonetoku relation between Ei,p and isotropic-equivalent luminosity Liso, both measured during the peak flux interval.

Original languageEnglish
Pages (from-to)2676-2685
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume529
Issue number3
DOIs
Publication statusPublished - 1 Apr 2024

Keywords

  • (stars:) gamma-ray burst: general
  • methods: data analysis

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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