Introduction

This page describes how to test run the low-latency multi-messenger analysis pipeline. This pipeline currently focuses on gravitational wave (GW) and high-energy neutrino (HEN) searches. This pipeline listens GW events and upon a trigger initiates searching for HENs and calculates a coincidence significance for spatially and temporally correlated GW and HEN. It then creates a joint skymap for candidate multi-messenger neutrino events. If the significance is higher than the determined threshold for multi-messenger events it sends a multi-messenger event alert.

Purpose

GWHEN-L2AP (Gravitational Wave + High Energy Neutrino Low Latency Analysis Pipeline) is a low-latency GW+HEN analysis pipeline that ran during O2 (using previously reviewed offline analysis methods) with the goal of rapidly identifying joint GW+HEN sources. This review targets the upgrades made to the pipeline, the most major of which is an upgrade to the significance calculation algorithm (see documentation section below).

Documentation

How to test

SSH into the review server using the instructions on the review wiki.

During the test the pipeline will be fully functional except for sending alerts for high significance events and uploading data products.

Test cases

Fake cases

There are fake created edge test scenarios for this review whose significance magnitudes can be ordered easily with respect to each other.

  1. Precise GW skymap temporally and spatially coincident with a neutrino event
  2. Coarse GW skymap temporally and spatially coincident with a neutrino event
  3. Precise GW skymap temporally coincident with a neutrino event
  4. Precise GW skymap spatially coincident with a neutrino event
  5. Coarse GW skymap temporally coincident with a neutrino event

Expectations for significances: a>b>e>c,d ~ 0

Use these commands to run scenario X ...

Generated joint skymaps can be accessed via ...

Real cases

For testing the pipeline with arbitrary real events, use these commands to run events with gracedb ID...

Generated joint skymaps can be accessed via ...

geco,CU,UFL logos GWHEN team: names and emails