Data details

Below, we provide injection summary files from the LIGO-Virgo-KAGRA (LVK) Collaboration for the second part of the third observing run (O3b). These files also include results from the IAS-HM search pipeline, as detailed in the paper Wadekar et al. 2024. The IAS-HM pipeline also incorporates higher modes (HMs), specifically the 33 and 44 modes in addition to the dominant 22 mode, in the search templates. Thanks to the mode-by-mode filtering approach, the computational cost of this pipeline is only three times that of a standard 22-mode-only search.

The provided files correspond to three different injection sets:

1. Binary Black Hole (BBH) injection set
2. Intermediate-Mass Black Hole (IMBH) binary injection set
3. Mixture injection set: Constructed as a union of all four injection sets (Binary Neutron Star (BNS), Neutron Star-Black Hole (NSBH), BBH, and IMBH binary).

These injection sets are publicly available on Zenodo.

Each injection summary file contains datasets such as component masses, spins, distances, and other parameters of the injected signals, along with their corresponding sampling probabilities. This information, combined with the astrophysical probability (pastro) and/or the inverse false alarm rate (IFAR) of detected injections, is sufficient to compute the sensitivity volume of the corresponding search pipeline. The files include pastro and IFAR values for the (same) injection signals from the five standard LVK pipelines: Coherent WaveBurst (cwb), GstLAL (gstlal), Multi-Band Template Analysis (mbta), PyCBC BBH-Focused Search (pycbc_bbh), and PyCBC Broad Search (pycbc_hyperbank). These LVK pipelines do not incorporate HMs in their search templates.

We provide the IAS pipeline results by including the following additional datasets:

•  pastro_IAS_hm and IFAR_IAS_hm: Representing results from the IAS-HM pipeline that includes higher modes.
•  pastro_IAS_22 and IFAR_IAS_22: Representing results from the 22-mode-only limit of the IAS-HM pipeline (where HMs are turned off).

It is important to note that the IAS-HM pipeline is specifically designed to search for BBH mergers where the black hole masses exceed 3 Msun. As a result, we do not provide IAS-HM results for the BNS and NSBH injection sets. In the mixture injection file, which includes these sets, we assign zero values to the additional IAS datasets (pastro_IAS_hm, IFAR_IAS_hm, pastro_IAS_22, IFAR_IAS_22) for such injections.

Acknowledgements

This research has made use of data or software obtained from the Gravitational Wave Open Science Center (gwosc.org), a service of the LIGO Scientific Collaboration, the Virgo Collaboration, and KAGRA. This material is based upon work supported by NSF's LIGO Laboratory which is a major facility fully funded by the National Science Foundation, as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. Virgo is funded, through the European Gravitational Observatory (EGO), by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale di Fisica Nucleare (INFN) and the Dutch Nikhef, with contributions by institutions from Belgium, Germany, Greece, Hungary, Ireland, Japan, Monaco, Poland, Portugal, Spain. KAGRA is supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan Society for the Promotion of Science (JSPS) in Japan; National Research Foundation (NRF) and Ministry of Science and ICT (MSIT) in Korea; Academia Sinica (AS) and National Science and Technology Council (NSTC) in Taiwan.