The Astrophysical Journal (Jan 2025)
Comprehensive Radio Monitoring of the Black Hole X-Ray Binary Swift J1727.8−1613 during Its 2023–2024 Outburst
- 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
Affiliations
- Andrew K. Hughes
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
- Francesco Carotenuto
- ORCiD
- INAF—Osservatorio Astronomico di Roma , Via Frascati 33, I-00076, Monte Porzio Catone (RM), Italy
- Thomas D. Russell
- ORCiD
- INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica , Via U. La Malfa 153, I-90146 Palermo, Italy
- Alexandra J. Tetarenko
- ORCiD
- Department of Physics and Astronomy, University of Lethbridge , Lethbridge, AB T1K 3M4, Canada
- James C. A. Miller-Jones
- ORCiD
- International Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, Australia
- Arash Bahramian
- ORCiD
- International Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, Australia
- Joe S. Bright
- ORCiD
- Department 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
- Fraser J. Cowie
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
- Rob Fender
- Department 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 Africa
- Mark A. Gurwell
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Jasvinderjit K. Khaulsay
- Department of Physics and Astronomy, The University of Sheffield , Hicks Building, Hounsfield Road, Sheffield, S3 7RH, UK
- Anastasia Kirby
- International Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, Australia
- Serena Jones
- International Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, Australia
- Elodie Lescure
- Department of Physics and Astronomy, University of Lethbridge , Lethbridge, AB T1K 3M4, Canada
- Michael McCollough
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Richard M. Plotkin
- ORCiD
- Department of Physics, University of Nevada , Reno, NV 89557, USA; Nevada Center for Astrophysics, University of Nevada , Las Vegas, NV 89154, USA
- Ramprasad Rao
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Saeqa D. Vrtilek
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- David R. A. Williams-Baldwin
- ORCiD
- Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester , Manchester, M13 9PL, UK
- Callan M. Wood
- ORCiD
- International Centre for Radio Astronomy Research, Curtin University , GPO Box U1987, Perth, WA 6845, Australia
- Gregory R. Sivakoff
- ORCiD
- Department of Physics, University of Alberta , CCIS 4-181, Edmonton, AB T6G 2E1, Canada
- Diego Altamirano
- ORCiD
- School of Physics & Astronomy, University of Southampton , SO17 1BJ, UK
- Piergiorgio Casella
- ORCiD
- INAF—Osservatorio Astronomico di Roma , Via Frascati 33, I-00076, Monte Porzio Catone (RM), Italy
- Stéphane Corbel
- ORCiD
- Université Paris Cité and Université Paris Saclay , CEA, CNRS, AIM, F-91190 Gif-sur-Yvette, France
- David R. DeBoer
- ORCiD
- Radio Astronomy Lab, University of California , Berkeley, CA 94720-3411, USA
- Melania Del Santo
- ORCiD
- INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica , Via U. La Malfa 153, I-90146 Palermo, Italy
- Constanza Echiburú-Trujillo
- ORCiD
- Department of Astrophysical and Planetary Sciences, JILA, Duane Physics Bldg., 2000 Colorado Ave., University of Colorado , Boulder, CO 80309, USA
- Wael Farah
- ORCiD
- SETI Institute , 339 Bernardo Ave, Suite 200 Mountain View, CA 94043, USA
- Poshak Gandhi
- ORCiD
- School of Physics & Astronomy, University of Southampton , SO17 1BJ, UK
- Karri I. I. Koljonen
- ORCiD
- Department of Physics, Norwegian University of Science and Technology , NO-7491 Trondheim, Norway
- Thomas Maccarone
- Department of Physics and Astronomy, Texas Tech University , Lubbock, TX 79409-1051, USA
- James H. Matthews
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
- Sera B. Markoff
- ORCiD
- Anton 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 Netherlands
- Alexander W. Pollak
- ORCiD
- SETI Institute , 339 Bernardo Ave, Suite 200 Mountain View, CA 94043, USA
- David M. Russell
- ORCiD
- Center for Astrophysics and Space Science (CASS), New York University Abu Dhabi , PO Box 129188, Abu Dhabi, UAE
- Payaswini Saikia
- ORCiD
- Center for Astrophysics and Space Science (CASS), New York University Abu Dhabi , PO Box 129188, Abu Dhabi, UAE
- Noel Castro Segura
- ORCiD
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV 4 7AL, UK
- Aarran W. Shaw
- ORCiD
- Department of Physics and Astronomy, Butler University , 4600 Sunset Avenue, Indianapolis, IN 46208, USA
- Andrew Siemion
- ORCiD
- Department 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, Malta
- Roberto Soria
- ORCiD
- INAF—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, Australia
- John A. Tomsick
- ORCiD
- Space Sciences Lab, University of California, Berkeley , 7 Gauss Way, Berkeley, CA 94720, USA
- Jakob van den Eijnden
- ORCiD
- Anton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands; Department of Physics, University of Warwick , Coventry, CV4 7AL, UK
- DOI
- https://doi.org/10.3847/1538-4357/ade2e6
- Journal volume & issue
-
Vol. 988,
no. 1
p. 109
Abstract
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.
Keywords
