Short gamma-ray bursts within 200 Mpc

34Citations
Citations of this article
20Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

We present a systematic search for short-duration gamma-ray bursts (GRBs) in the local Universe based on 14 yr of observations with the Neil Gehrels Swift Observatory. We cross-correlate the GRB positions with the GLADE catalogue of nearby galaxies, and find no event at a distance ≲100 Mpc and four plausible candidates in the range 100 Mpc ≲ D ≲ 200 Mpc. Although affected by low statistics, this number is higher than the one expected for chance alignments to random galaxies, and possibly suggests a physical association between these bursts and nearby galaxies. By assuming a local origin, we use these events to constrain the range of properties for X-ray counterparts of neutron star mergers. Optical upper limits place tight constraints on the onset of a blue kilonova, and imply either low masses (≲ 10−3 M☉) of lanthanide-poor ejecta or unfavorable orientations (θobs ≳ 30 deg). Finally, we derive that the all-sky rate of detectable short GRBs within 200 Mpc is 1.3+1.7−0.8 yr−1 (68 per cent confidence interval), and discuss the implications for the GRB outflow structure. If these candidates are instead of cosmological origin, we set a upper limit of ≲2.0 yr−1 (90 per cent confidence interval) to the rate of nearby events detectable with operating gamma-ray observatories, such as Swift and Fermi.

Cite

CITATION STYLE

APA

Dichiara, S., Troja, E., O’Connor, B., Marshall, F. E., Beniamini, P., Cannizzo, J. K., … Sakamoto, T. (2020). Short gamma-ray bursts within 200 Mpc. Monthly Notices of the Royal Astronomical Society, 492(4), 5011–5022. https://doi.org/10.1093/MNRAS/STAA124

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free