Searches for Prompt Low-Frequency Radio Counterparts to Gravitational Wave Event S250206dm with the OVRO-LWA Time Machine
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| Format: | Preprint |
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2025
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| author | Kosogorov, Nikita Hallinan, Gregg Law, Casey Hickish, Jack Dowell, Jayce Mooley, Kunal P. Anderson, Marin M. Bowman, Judd D. Byrne, Ruby Catha, Morgan Chen, Bin Chen, Xingyao Chhabra, Sherry D'Addario, Larry Davis, Ivey Elder, Katherine Gary, Dale Harnach, Charlie Hellbourg, Greg Hobbs, Rick Hodge, David Hodges, Mark Huang, Yuping Isella, Andrea Jacobs, Daniel C. Kemby, Ghislain Klinefelter, John T. Kolopanis, Matthew Lamb, James Mahesh, Nivedita Mondal, Surajit O'Donnell, Brian Plant, Kathryn Posner, Corey Powell, Travis Prayag, Vinand Rizo, Andres Romero-Wolf, Andrew Shi, Jun Taylor, Greg Trim, Jordan Virgin, Mike Vydula, Akshatha Weinreb, Sandy White, Scott Woody, David Yu, Sijie Zentmeyer, Thomas Zhang, Peijin |
| author_facet | Kosogorov, Nikita Hallinan, Gregg Law, Casey Hickish, Jack Dowell, Jayce Mooley, Kunal P. Anderson, Marin M. Bowman, Judd D. Byrne, Ruby Catha, Morgan Chen, Bin Chen, Xingyao Chhabra, Sherry D'Addario, Larry Davis, Ivey Elder, Katherine Gary, Dale Harnach, Charlie Hellbourg, Greg Hobbs, Rick Hodge, David Hodges, Mark Huang, Yuping Isella, Andrea Jacobs, Daniel C. Kemby, Ghislain Klinefelter, John T. Kolopanis, Matthew Lamb, James Mahesh, Nivedita Mondal, Surajit O'Donnell, Brian Plant, Kathryn Posner, Corey Powell, Travis Prayag, Vinand Rizo, Andres Romero-Wolf, Andrew Shi, Jun Taylor, Greg Trim, Jordan Virgin, Mike Vydula, Akshatha Weinreb, Sandy White, Scott Woody, David Yu, Sijie Zentmeyer, Thomas Zhang, Peijin |
| contents | We report on a search for prompt, low-frequency radio emission from the gravitational-wave (GW) merger S250206dm using the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA). Early alerts favored a neutron-star-containing merger, making this a compelling target. Motivated by theoretical predictions of coherent radio bursts from mergers involving a neutron star, we utilized the OVRO-LWA Time Machine system to analyze voltage data recorded around the time of the event. The Time Machine is a two-stage voltage buffer and processing pipeline that continuously buffers raw data from all antennas across the array's nearly full-hemisphere instantaneous field of view, enabling retrospective beamforming, dedispersion, and fast-transient candidate identification. For this event, we analyzed a 30-minute interval beginning 3.5 minutes after the merger, which included two minutes of pre-alert data recovered by the ring buffer. We searched the 50% localization probability region with millisecond time resolution in the 69-86 MHz frequency band. No radio counterpart was detected above a 7-sigma fluence detection threshold of ~150 Jy ms. Using Bayesian analysis, we place a 95% confidence upper limit on the source luminosity of L95 = 4 x 10^41 erg s^-1. These constraints start to probe the bright end of the coherent-emission parameter space predicted by jet-ISM shock processes, magnetar and blitzar-like mechanisms, and recent simulation-based scenarios for neutron-star-containing mergers. This study presents the first sensitive, large-area, millisecond-timescale search for prompt low-frequency radio emission from a GW merger with the OVRO-LWA, establishing a framework in which about ten additional events will yield stringent population-level constraints. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_18543 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searches for Prompt Low-Frequency Radio Counterparts to Gravitational Wave Event S250206dm with the OVRO-LWA Time Machine Kosogorov, Nikita Hallinan, Gregg Law, Casey Hickish, Jack Dowell, Jayce Mooley, Kunal P. Anderson, Marin M. Bowman, Judd D. Byrne, Ruby Catha, Morgan Chen, Bin Chen, Xingyao Chhabra, Sherry D'Addario, Larry Davis, Ivey Elder, Katherine Gary, Dale Harnach, Charlie Hellbourg, Greg Hobbs, Rick Hodge, David Hodges, Mark Huang, Yuping Isella, Andrea Jacobs, Daniel C. Kemby, Ghislain Klinefelter, John T. Kolopanis, Matthew Lamb, James Mahesh, Nivedita Mondal, Surajit O'Donnell, Brian Plant, Kathryn Posner, Corey Powell, Travis Prayag, Vinand Rizo, Andres Romero-Wolf, Andrew Shi, Jun Taylor, Greg Trim, Jordan Virgin, Mike Vydula, Akshatha Weinreb, Sandy White, Scott Woody, David Yu, Sijie Zentmeyer, Thomas Zhang, Peijin High Energy Astrophysical Phenomena We report on a search for prompt, low-frequency radio emission from the gravitational-wave (GW) merger S250206dm using the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA). Early alerts favored a neutron-star-containing merger, making this a compelling target. Motivated by theoretical predictions of coherent radio bursts from mergers involving a neutron star, we utilized the OVRO-LWA Time Machine system to analyze voltage data recorded around the time of the event. The Time Machine is a two-stage voltage buffer and processing pipeline that continuously buffers raw data from all antennas across the array's nearly full-hemisphere instantaneous field of view, enabling retrospective beamforming, dedispersion, and fast-transient candidate identification. For this event, we analyzed a 30-minute interval beginning 3.5 minutes after the merger, which included two minutes of pre-alert data recovered by the ring buffer. We searched the 50% localization probability region with millisecond time resolution in the 69-86 MHz frequency band. No radio counterpart was detected above a 7-sigma fluence detection threshold of ~150 Jy ms. Using Bayesian analysis, we place a 95% confidence upper limit on the source luminosity of L95 = 4 x 10^41 erg s^-1. These constraints start to probe the bright end of the coherent-emission parameter space predicted by jet-ISM shock processes, magnetar and blitzar-like mechanisms, and recent simulation-based scenarios for neutron-star-containing mergers. This study presents the first sensitive, large-area, millisecond-timescale search for prompt low-frequency radio emission from a GW merger with the OVRO-LWA, establishing a framework in which about ten additional events will yield stringent population-level constraints. |
| title | Searches for Prompt Low-Frequency Radio Counterparts to Gravitational Wave Event S250206dm with the OVRO-LWA Time Machine |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.18543 |