ASAS-SN Rates IV: Constraints on the Kilonova Rate
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| author | Desai, Dhvanil D. Shappee, Benjamin J. Kochanek, Christopher S. Stanek, Krzysztof Z. Auchettl, Katie Beacom, John F. Cooke, Jeff Dong, Subo Hoogendam, Willem B. Prieto, Jose L. Thompson, Todd A. Tucker, Michael A. Van Bemmel, Natasha |
| author_facet | Desai, Dhvanil D. Shappee, Benjamin J. Kochanek, Christopher S. Stanek, Krzysztof Z. Auchettl, Katie Beacom, John F. Cooke, Jeff Dong, Subo Hoogendam, Willem B. Prieto, Jose L. Thompson, Todd A. Tucker, Michael A. Van Bemmel, Natasha |
| contents | Kilonovae (KNe) are the electromagnetic signatures of neutron star mergers and are likely the dominant site of cosmic $r$-process nucleosynthesis. However, their intrinsic rate remains poorly constrained due to a paucity of confirmed events. We use the All-Sky Automated Survey for Supernovae (ASAS-SN) to place limits on the rate of bright, nearby KNe over an 11-year baseline ranging from 2014 to 2024. To evaluate the survey's completeness for KNe, we employ an injection-recovery simulation using a shock-cooling cocoon model calibrated to the early blue emission of the only well-sampled KN, SSS17a (AT 2017gfo). Finding no KNe within the survey, we calculate a $2σ$ ($\sim95\%$) upper limit on the local volumetric KN rate of $R_{\mathrm{KN}} < 4400\,\mathrm{yr}^{-1}\,\mathrm{Gpc}^{-3}$. Despite ASAS-SN's shallower limiting magnitude compared to other time-domain searches, its continuous, high-cadence, all-sky monitoring yields a constraint that is competitive with the strongest results from electromagnetic surveys but remains a factor of 18 higher than the LIGO-Virgo-KAGRA GWTC-4 estimate of the binary neutron star merger rate. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_26871 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | ASAS-SN Rates IV: Constraints on the Kilonova Rate Desai, Dhvanil D. Shappee, Benjamin J. Kochanek, Christopher S. Stanek, Krzysztof Z. Auchettl, Katie Beacom, John F. Cooke, Jeff Dong, Subo Hoogendam, Willem B. Prieto, Jose L. Thompson, Todd A. Tucker, Michael A. Van Bemmel, Natasha High Energy Astrophysical Phenomena Kilonovae (KNe) are the electromagnetic signatures of neutron star mergers and are likely the dominant site of cosmic $r$-process nucleosynthesis. However, their intrinsic rate remains poorly constrained due to a paucity of confirmed events. We use the All-Sky Automated Survey for Supernovae (ASAS-SN) to place limits on the rate of bright, nearby KNe over an 11-year baseline ranging from 2014 to 2024. To evaluate the survey's completeness for KNe, we employ an injection-recovery simulation using a shock-cooling cocoon model calibrated to the early blue emission of the only well-sampled KN, SSS17a (AT 2017gfo). Finding no KNe within the survey, we calculate a $2σ$ ($\sim95\%$) upper limit on the local volumetric KN rate of $R_{\mathrm{KN}} < 4400\,\mathrm{yr}^{-1}\,\mathrm{Gpc}^{-3}$. Despite ASAS-SN's shallower limiting magnitude compared to other time-domain searches, its continuous, high-cadence, all-sky monitoring yields a constraint that is competitive with the strongest results from electromagnetic surveys but remains a factor of 18 higher than the LIGO-Virgo-KAGRA GWTC-4 estimate of the binary neutron star merger rate. |
| title | ASAS-SN Rates IV: Constraints on the Kilonova Rate |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.26871 |