Updates to the Fermi GBM Targeted Sub-threshold Search in Preparation for the Third Observing Run of LIGO/Virgo

Adam Goldstein , Rachel Hamburg , Joshua Wood , C. Michelle Hui , William H. Cleveland , Daniel Kocevski , Tyson Littenberg , Eric Burns , Tito Dal Canton (1) , Peter Veres , Bagrat Mailyan , Christian Malacaria , Michael S. Briggs , Colleen A. Wilson-Hodge

1 LAL - Laboratoire de l'Accélérateur Linéaire

In this document, we detail the improvements made to the Fermi GBM targeted sub-threshold search for counterparts to LIGO/Virgo gravitational-wave triggers. We describe the implemented changes and compare the sensitivity of the O3 search to that of the version of the search that operated during O2. Overall, we have improved both the sensitivity and speed of the targeted search. Further improvements to the search have been made for the O3b observing run, including automated upperlimits estimation and incorporating the updated localization systematic with the new version of the search.

Mots clés: detector: sensitivity; VIRGO; LIGO; gravitational radiation; gravitational radiation detector; gravitational radiation: direct detection; gravitational radiation: emission; electromagnetic field: production; gamma ray: burst

Domaines: Astrophysique [astro-ph]

Adam Goldstein, Rachel Hamburg, Joshua Wood, C. Michelle Hui, William H. Cleveland, et al.. Updates to the Fermi GBM Targeted Sub-threshold Search in Preparation for the Third Observing Run of LIGO/Virgo. 2019. ⟨hal-02352517⟩