Interpreting the Recent Upper Limit on the Gravitational Wave Background from the Parkes Pulsar Timing Array

TL;DR

This paper discusses the recent upper limit on the gravitational wave background from pulsar timing data, clarifying misconceptions about the implications for supermassive black hole binaries.

Contribution

It offers critical commentary and clarification on the interpretation of gravitational wave background limits from pulsar timing array data.

Findings

Clarifies misconceptions about gravitational wave limits

Highlights importance of data interpretation in astrophysics

Emphasizes need for accurate communication of scientific results

Abstract

We provide comments on the article by Shannon et al. (Sep 2015) entitled "Gravitational waves from binary supermassive black holes missing in pulsar observations". The purpose of this letter is to address several misconceptions of the public and other scientists regarding the conclusions of that work.