2005/11/30 by G. Ghirlanda, M. Magliocchetti, G. Ghisellini +1 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Gamma-ray bursts and supernovae #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2006.00147.x
published as Mon.Not.Roy.Astron.Soc.Lett.368:L20-L24,2006 · 5 pages, 5 figures, accepted for publication in MNRAS
arxiv created 2006/01/26 · openalex publication_date 2006/02/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
Abstract We cross-correlate gamma-ray bursts (GRBs) and X-ray selected clusters of galaxies at z≤ 0.45. We find a positive 2σ signal for the angular cross-correlation function wbc(θ) on scales θ≤ 3° between short GRBs and clusters. Conversely, no correlation is found between clusters and the population of long GRBs. The comparison with the cluster autocorrelation function shows that short GRBs do not trace the cluster distribution, as not all short GRBs are found in clusters. A higher signal in wbc(θ) is found if we only consider the cluster population up to z= 0.1. By comparing the short-burst autocorrelation function with model predictions, we then constrain short bursts to mostly originate within ∼270 Mpc (i.e. z≤ 0.06). Our analysis also reveals that short GRBs are better correlated with ‘normal’ galaxies. The double compact-object merger model for short GRBs would associate them preferentially with early-type galaxies, but the present statistics do not allow us to exclude that at least a fraction of these events might also take place in late-type galaxies, in agreement with recent evidence.