Gravitational-wave and electromagnetic detections in the context of the CosmoDC2 LSST synthetic catalog
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918385569234944 |
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| author | Menote, Ranier Marra, Valerio Sturani, Riccardo Andrade-Oliveira, Felipe Bom, Clécio R. Collaboration, The LSST Dark Energy Science |
| author_facet | Menote, Ranier Marra, Valerio Sturani, Riccardo Andrade-Oliveira, Felipe Bom, Clécio R. Collaboration, The LSST Dark Energy Science |
| contents | We release CosmoDC2_BCO, a synthetic catalog of gravitational-wave events and electromagnetic counterparts associated with galaxies from CosmoDC2. The catalog provides intrinsic and extrinsic source parameters, signal-to-noise ratios, parameter uncertainties, sky localization areas, and kilonova apparent magnitudes in LSST filters. Our results show that third-generation detector networks substantially increase detection rates and improve parameter estimation. Second-generation detectors, when combined with third-generation ones, significantly enhance sky localization and distance precision, particularly for BNS mergers. Assuming a simplified Target of Opportunity strategy, we estimate that an LSST-like survey, partnered with the CE+ET+LVK network at 70% duty cycle, could detect about 5000 kilonovae with GW counterparts over a 10-year period on a 16000 deg^2 footprint, predominantly from low-mass BNS mergers that produce long-lived supermassive neutron star remnants. While this is a substantial number, it represents only a small fraction of the total neutron star mergers expected to be observed by third-generation networks. These projections rely on several simplifying assumptions-including the adopted merger rate, the kilonova luminosity distribution, and the configuration and scheduling of future surveys-which introduce notable uncertainties. Therefore, the estimated detection numbers should be interpreted with appropriate caution. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_18727 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gravitational-wave and electromagnetic detections in the context of the CosmoDC2 LSST synthetic catalog Menote, Ranier Marra, Valerio Sturani, Riccardo Andrade-Oliveira, Felipe Bom, Clécio R. Collaboration, The LSST Dark Energy Science High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics We release CosmoDC2_BCO, a synthetic catalog of gravitational-wave events and electromagnetic counterparts associated with galaxies from CosmoDC2. The catalog provides intrinsic and extrinsic source parameters, signal-to-noise ratios, parameter uncertainties, sky localization areas, and kilonova apparent magnitudes in LSST filters. Our results show that third-generation detector networks substantially increase detection rates and improve parameter estimation. Second-generation detectors, when combined with third-generation ones, significantly enhance sky localization and distance precision, particularly for BNS mergers. Assuming a simplified Target of Opportunity strategy, we estimate that an LSST-like survey, partnered with the CE+ET+LVK network at 70% duty cycle, could detect about 5000 kilonovae with GW counterparts over a 10-year period on a 16000 deg^2 footprint, predominantly from low-mass BNS mergers that produce long-lived supermassive neutron star remnants. While this is a substantial number, it represents only a small fraction of the total neutron star mergers expected to be observed by third-generation networks. These projections rely on several simplifying assumptions-including the adopted merger rate, the kilonova luminosity distribution, and the configuration and scheduling of future surveys-which introduce notable uncertainties. Therefore, the estimated detection numbers should be interpreted with appropriate caution. |
| title | Gravitational-wave and electromagnetic detections in the context of the CosmoDC2 LSST synthetic catalog |
| topic | High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.18727 |