Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst

This work presents comprehensive multifrequency radio monitoring of the black hole low-mass X-ray binary (LMXB) Swift J1727.8−1613, which underwent its first recorded outburst after its discovery in 2023 August. Through a considerable community effort, we have coalesced the data from multiple, disti...

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Main Authors: Andrew K. Hughes, Francesco Carotenuto, Thomas D. Russell, Alexandra J. Tetarenko, James C. A. Miller-Jones, Arash Bahramian, Joe S. Bright, Fraser J. Cowie, Rob Fender, Mark A. Gurwell, Jasvinderjit K. Khaulsay, Anastasia Kirby, Serena Jones, Elodie Lescure, Michael McCollough, Richard M. Plotkin, Ramprasad Rao, Saeqa D. Vrtilek, David R. A. Williams-Baldwin, Callan M. Wood, Gregory R. Sivakoff, Diego Altamirano, Piergiorgio Casella, Stéphane Corbel, David R. DeBoer, Melania Del Santo, Constanza Echiburú-Trujillo, Wael Farah, Poshak Gandhi, Karri I. I. Koljonen, Thomas Maccarone, James H. Matthews, Sera B. Markoff, Alexander W. Pollak, David M. Russell, Payaswini Saikia, Noel Castro Segura, Aarran W. Shaw, Andrew Siemion, Roberto Soria, John A. Tomsick, Jakob van den Eijnden
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal
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Online Access:https://doi.org/10.3847/1538-4357/ade2e6
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author Andrew K. Hughes
Francesco Carotenuto
Thomas D. Russell
Alexandra J. Tetarenko
James C. A. Miller-Jones
Arash Bahramian
Joe S. Bright
Fraser J. Cowie
Rob Fender
Mark A. Gurwell
Jasvinderjit K. Khaulsay
Anastasia Kirby
Serena Jones
Elodie Lescure
Michael McCollough
Richard M. Plotkin
Ramprasad Rao
Saeqa D. Vrtilek
David R. A. Williams-Baldwin
Callan M. Wood
Gregory R. Sivakoff
Diego Altamirano
Piergiorgio Casella
Stéphane Corbel
David R. DeBoer
Melania Del Santo
Constanza Echiburú-Trujillo
Wael Farah
Poshak Gandhi
Karri I. I. Koljonen
Thomas Maccarone
James H. Matthews
Sera B. Markoff
Alexander W. Pollak
David M. Russell
Payaswini Saikia
Noel Castro Segura
Aarran W. Shaw
Andrew Siemion
Roberto Soria
John A. Tomsick
Jakob van den Eijnden
author_facet Andrew K. Hughes
Francesco Carotenuto
Thomas D. Russell
Alexandra J. Tetarenko
James C. A. Miller-Jones
Arash Bahramian
Joe S. Bright
Fraser J. Cowie
Rob Fender
Mark A. Gurwell
Jasvinderjit K. Khaulsay
Anastasia Kirby
Serena Jones
Elodie Lescure
Michael McCollough
Richard M. Plotkin
Ramprasad Rao
Saeqa D. Vrtilek
David R. A. Williams-Baldwin
Callan M. Wood
Gregory R. Sivakoff
Diego Altamirano
Piergiorgio Casella
Stéphane Corbel
David R. DeBoer
Melania Del Santo
Constanza Echiburú-Trujillo
Wael Farah
Poshak Gandhi
Karri I. I. Koljonen
Thomas Maccarone
James H. Matthews
Sera B. Markoff
Alexander W. Pollak
David M. Russell
Payaswini Saikia
Noel Castro Segura
Aarran W. Shaw
Andrew Siemion
Roberto Soria
John A. Tomsick
Jakob van den Eijnden
author_sort Andrew K. Hughes
collection DOAJ
description This work presents comprehensive multifrequency radio monitoring of the black hole low-mass X-ray binary (LMXB) Swift J1727.8−1613, which underwent its first recorded outburst after its discovery in 2023 August. Through a considerable community effort, we have coalesced the data from multiple, distinct observing programs; the light curves include ∼10 months and 197 epochs of monitoring from seven radio facilities with observing frequencies ranging from (approximately) 0.3–230 GHz. The primary purpose of this work is to provide the broader astronomical community with these light curves to assist with the interpretation of other observing campaigns, particularly nonradio observing frequencies. We discuss the phenomenological evolution of the source, which included (i) multiple radio flares consistent with the launching of discrete jet ejections, the brightest of which reached ∼1 Jy; (ii) temporally evolving radio spectral indices ( α ), reaching values steeper than expected for optically thin synchrotron emission ( α  < −1) and emission with significant radiative cooling ( α  < −1.5). We have published a digital copy of the data and intend for this work to set a precedent for the community to continue releasing comprehensive radio light curves of future LMXB outbursts.
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spelling doaj-art-a4c435f9336e41ecbc6b2f7f276e8c2b2025-08-20T02:40:08ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988110910.3847/1538-4357/ade2e6Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 OutburstAndrew K. Hughes0https://orcid.org/0000-0003-0764-0687Francesco Carotenuto1https://orcid.org/0000-0002-0426-3276Thomas D. Russell2https://orcid.org/0000-0002-7930-2276Alexandra J. Tetarenko3https://orcid.org/0000-0003-3906-4354James C. A. Miller-Jones4https://orcid.org/0000-0003-3124-2814Arash Bahramian5https://orcid.org/0000-0003-2506-6041Joe S. Bright6https://orcid.org/0000-0002-7735-5796Fraser J. Cowie7https://orcid.org/0009-0009-0079-2419Rob Fender8Mark A. Gurwell9https://orcid.org/0000-0003-0685-3621Jasvinderjit K. Khaulsay10Anastasia Kirby11Serena Jones12Elodie Lescure13Michael McCollough14https://orcid.org/0000-0002-8384-3374Richard M. Plotkin15https://orcid.org/0000-0002-7092-0326Ramprasad Rao16https://orcid.org/0000-0002-1407-7944Saeqa D. Vrtilek17https://orcid.org/0000-0002-7521-9897David R. A. Williams-Baldwin18https://orcid.org/0000-0001-7361-0246Callan M. Wood19https://orcid.org/0000-0002-2758-0864Gregory R. Sivakoff20https://orcid.org/0000-0001-6682-916XDiego Altamirano21https://orcid.org/0000-0002-3422-0074Piergiorgio Casella22https://orcid.org/0000-0002-0752-3301Stéphane Corbel23https://orcid.org/0000-0001-5538-5831David R. DeBoer24https://orcid.org/0000-0003-3197-2294Melania Del Santo25https://orcid.org/0000-0002-1793-1050Constanza Echiburú-Trujillo26https://orcid.org/0000-0001-8436-1847Wael Farah27https://orcid.org/0000-0002-0161-7243Poshak Gandhi28https://orcid.org/0000-0003-3105-2615Karri I. I. Koljonen29https://orcid.org/0000-0002-9677-1533Thomas Maccarone30James H. Matthews31https://orcid.org/0000-0002-3493-7737Sera B. Markoff32https://orcid.org/0000-0001-9564-0876Alexander W. Pollak33https://orcid.org/0000-0002-3430-7671David M. Russell34https://orcid.org/0000-0002-3500-631XPayaswini Saikia35https://orcid.org/0000-0002-5319-6620Noel Castro Segura36https://orcid.org/0000-0002-5870-0443Aarran W. Shaw37https://orcid.org/0000-0002-8808-520XAndrew Siemion38https://orcid.org/0000-0003-2828-7720Roberto Soria39https://orcid.org/0000-0002-4622-796XJohn A. Tomsick40https://orcid.org/0000-0001-5506-9855Jakob van den Eijnden41https://orcid.org/0000-0002-5686-0611Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UKINAF—Osservatorio Astronomico di Roma , Via Frascati 33, I-00076, Monte Porzio Catone (RM), ItalyINAF, Istituto di Astrofisica Spaziale e Fisica Cosmica , Via U. La Malfa 153, I-90146 Palermo, ItalyDepartment of Physics and Astronomy, University of Lethbridge , Lethbridge, AB T1K 3M4, CanadaInternational Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, AustraliaInternational Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, AustraliaDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK; Breakthrough Listen, Astrophysics, Department of Physics, The University of Oxford , Keble Road, Oxford, OX1 3RH, UKDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UKDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK; Department of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701, South AfricaCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USADepartment of Physics and Astronomy, The University of Sheffield , Hicks Building, Hounsfield Road, Sheffield, S3 7RH, UKInternational Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, AustraliaInternational Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, AustraliaDepartment of Physics and Astronomy, University of Lethbridge , Lethbridge, AB T1K 3M4, CanadaCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USADepartment of Physics, University of Nevada , Reno, NV 89557, USA; Nevada Center for Astrophysics, University of Nevada , Las Vegas, NV 89154, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USAJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester , Manchester, M13 9PL, UKInternational Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, AustraliaDepartment of Physics, University of Alberta , CCIS 4-181, Edmonton, AB T6G 2E1, CanadaSchool of Physics & Astronomy, University of Southampton , SO17 1BJ, UKINAF—Osservatorio Astronomico di Roma , Via Frascati 33, I-00076, Monte Porzio Catone (RM), ItalyUniversité Paris Cité and Université Paris Saclay , CEA, CNRS, AIM, F-91190 Gif-sur-Yvette, FranceRadio Astronomy Lab, University of California , Berkeley, CA 94720-3411, USAINAF, Istituto di Astrofisica Spaziale e Fisica Cosmica , Via U. La Malfa 153, I-90146 Palermo, ItalyDepartment of Astrophysical and Planetary Sciences, JILA, Duane Physics Bldg., 2000 Colorado Ave., University of Colorado , Boulder, CO 80309, USASETI Institute , 339 Bernardo Ave, Suite 200 Mountain View, CA 94043, USASchool of Physics & Astronomy, University of Southampton , SO17 1BJ, UKDepartment of Physics, Norwegian University of Science and Technology , NO-7491 Trondheim, NorwayDepartment of Physics and Astronomy, Texas Tech University , Lubbock, TX 79409-1051, USADepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UKAnton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands; Gravitation and Astroparticle Physics Amsterdam Institute, University of Amsterdam , Science Park 904, 1098 XH 195 196 Amsterdam, The NetherlandsSETI Institute , 339 Bernardo Ave, Suite 200 Mountain View, CA 94043, USACenter for Astrophysics and Space Science (CASS), New York University Abu Dhabi , PO Box 129188, Abu Dhabi, UAECenter for Astrophysics and Space Science (CASS), New York University Abu Dhabi , PO Box 129188, Abu Dhabi, UAEDepartment of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV 4 7AL, UKDepartment of Physics and Astronomy, Butler University , 4600 Sunset Avenue, Indianapolis, IN 46208, USADepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK; Breakthrough Listen, Astrophysics, Department of Physics, The University of Oxford , Keble Road, Oxford, OX1 3RH, UK; SETI Institute , 339 Bernardo Ave, Suite 200, Mountain View, CA 94043, USA; Berkeley SETI Research Centre, University of California , Berkeley, CA 94720, USA; Department of Physics and Astronomy, University of Manchester , Manchester, M13 9PL, UK; University of Malta , Institute of Space Sciences and Astronomy, Msida, MSD2080, MaltaINAF—Osservatorio Astrofisico di Torino , Strada Osservatorio 20, I-10025 Pino Torinese, Italy; Sydney Institute for Astronomy, School of Physics A28, The University of Sydney , Sydney, NSW 2006, AustraliaSpace Sciences Lab, University of California, Berkeley , 7 Gauss Way, Berkeley, CA 94720, USAAnton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands; Department of Physics, University of Warwick , Coventry, CV4 7AL, UKThis work presents comprehensive multifrequency radio monitoring of the black hole low-mass X-ray binary (LMXB) Swift J1727.8−1613, which underwent its first recorded outburst after its discovery in 2023 August. Through a considerable community effort, we have coalesced the data from multiple, distinct observing programs; the light curves include ∼10 months and 197 epochs of monitoring from seven radio facilities with observing frequencies ranging from (approximately) 0.3–230 GHz. The primary purpose of this work is to provide the broader astronomical community with these light curves to assist with the interpretation of other observing campaigns, particularly nonradio observing frequencies. We discuss the phenomenological evolution of the source, which included (i) multiple radio flares consistent with the launching of discrete jet ejections, the brightest of which reached ∼1 Jy; (ii) temporally evolving radio spectral indices ( α ), reaching values steeper than expected for optically thin synchrotron emission ( α  < −1) and emission with significant radiative cooling ( α  < −1.5). We have published a digital copy of the data and intend for this work to set a precedent for the community to continue releasing comprehensive radio light curves of future LMXB outbursts.https://doi.org/10.3847/1538-4357/ade2e6AccretionRadio continuum emissionBlack holesRelativistic jetsX-ray binary stars
spellingShingle Andrew K. Hughes
Francesco Carotenuto
Thomas D. Russell
Alexandra J. Tetarenko
James C. A. Miller-Jones
Arash Bahramian
Joe S. Bright
Fraser J. Cowie
Rob Fender
Mark A. Gurwell
Jasvinderjit K. Khaulsay
Anastasia Kirby
Serena Jones
Elodie Lescure
Michael McCollough
Richard M. Plotkin
Ramprasad Rao
Saeqa D. Vrtilek
David R. A. Williams-Baldwin
Callan M. Wood
Gregory R. Sivakoff
Diego Altamirano
Piergiorgio Casella
Stéphane Corbel
David R. DeBoer
Melania Del Santo
Constanza Echiburú-Trujillo
Wael Farah
Poshak Gandhi
Karri I. I. Koljonen
Thomas Maccarone
James H. Matthews
Sera B. Markoff
Alexander W. Pollak
David M. Russell
Payaswini Saikia
Noel Castro Segura
Aarran W. Shaw
Andrew Siemion
Roberto Soria
John A. Tomsick
Jakob van den Eijnden
Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
The Astrophysical Journal
Accretion
Radio continuum emission
Black holes
Relativistic jets
X-ray binary stars
title Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
title_full Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
title_fullStr Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
title_full_unstemmed Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
title_short Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
title_sort comprehensive radio monitoring of the black hole x ray binary swift j1727 8 1613 during its 2023 2024 outburst
topic Accretion
Radio continuum emission
Black holes
Relativistic jets
X-ray binary stars
url https://doi.org/10.3847/1538-4357/ade2e6
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