Dr. James Gillanders: Publications

Calculations of multipole transitions in Sn II for kilonova analysis

The European Physical Journal D Springer Nature 77:7 (2023) 126

Authors:

AI Bondarev, JH Gillanders, C Cheung, MS Safronova, S Fritzsche

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Panning for gold, but finding helium: Discovery of the ultra-stripped supernova SN 2019wxt from gravitational-wave follow-up observations

Astronomy & Astrophysics EDP Sciences 675 (2023) a201

Authors:

I Agudo, L Amati, T An, FE Bauer, S Benetti, MG Bernardini, R Beswick, K Bhirombhakdi, T de Boer, M Branchesi, SJ Brennan, E Brocato, MD Caballero-García, E Cappellaro, N Castro Rodríguez, AJ Castro-Tirado, KC Chambers, E Chassande-Mottin, S Chaty, T-W Chen, A Coleiro, S Covino, F D’Ammando, P D’Avanzo, V D’Elia, A Fiore, A Flörs, M Fraser, S Frey, C Frohmaier, M Fulton, L Galbany, C Gall, H Gao, J García-Rojas, G Ghirlanda, S Giarratana, JH Gillanders, M Giroletti, BP Gompertz, M Gromadzki, KE Heintz, J Hjorth, Y-D Hu, ME Huber, A Inkenhaag, L Izzo, ZP Jin, PG Jonker, DA Kann, EC Kool, R Kotak, G Leloudas, AJ Levan, C-C Lin, JD Lyman, EA Magnier, K Maguire, I Mandel, B Marcote, D Mata Sánchez, S Mattila, A Melandri, MJ Michałowski, J Moldon, M Nicholl, A Nicuesa Guelbenzu, SR Oates, F Onori, M Orienti, R Paladino, Z Paragi, M Perez-Torres, E Pian, G Pignata, S Piranomonte, J Quirola-Vásquez, F Ragosta, A Rau, S Ronchini, A Rossi, R Sánchez-Ramírez, OS Salafia, S Schulze, SJ Smartt, KW Smith, J Sollerman, S Srivastav, RLC Starling, D Steeghs, HF Stevance, NR Tanvir, V Testa, MAP Torres, A Valeev, SD Vergani, D Vescovi, R Wainscost, D Watson, K Wiersema, Ł Wyrzykowski, J Yang, S Yang, DR Young

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Modelling the spectra of the kilonova AT2017gfo -- II: Beyond the photospheric epochs

(2023)

Authors:

JH Gillanders, SA Sim, SJ Smartt, S Goriely, A Bauswein

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A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A

The Astrophysical Journal Letters American Astronomical Society 949:2 (2023) l39

Authors:

Gokul P Srinivasaragavan, Brendan O’Connor, S Bradley Cenko, Alexander J Dittmann, Sheng Yang, Jesper Sollerman, GC Anupama, Sudhanshu Barway, Varun Bhalerao, Harsh Kumar, Vishwajeet Swain, Erica Hammerstein, Isiah Holt, Shreya Anand, Igor Andreoni, Michael W Coughlin, Simone Dichiara, Avishay Gal-Yam, M Coleman Miller, Jaime Soon, Roberto Soria, Joseph Durbak, James H Gillanders, Sibasish Laha, Anna M Moore, Fabio Ragosta, Eleonora Troja

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A structured jet explains the extreme GRB 221009A.

Science advances 9:23 (2023) eadi1405

Authors:

Brendan O'Connor, Eleonora Troja, Geoffrey Ryan, Paz Beniamini, Hendrik van Eerten, Jonathan Granot, Simone Dichiara, Roberto Ricci, Vladimir Lipunov, James H Gillanders, Ramandeep Gill, Michael Moss, Shreya Anand, Igor Andreoni, Rosa L Becerra, David AH Buckley, Nathaniel R Butler, Stephen B Cenko, Aristarkh Chasovnikov, Joseph Durbak, Carlos Francile, Erica Hammerstein, Alexander J van der Horst, Mansi M Kasliwal, Chryssa Kouveliotou, Alexander S Kutyrev, William H Lee, Gokul P Srinivasaragavan, Vladislav Topolev, Alan M Watson, Yuhan Yang, Kirill Zhirkov

Abstract:

Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far the brightest burst ever observed. Because of its enormous energy (E_iso ≈ 10⁵⁵ erg) and proximity (z ≈ 0.15), GRB 221009A is an exceptionally rare event that pushes the limits of our theories. We present multiwavelength observations covering the first 3 months of its afterglow evolution. The x-ray brightness decays as a power law with slope ≈t^-1.66, which is not consistent with standard predictions for jetted emission. We attribute this behavior to a shallow energy profile of the relativistic jet. A similar trend is observed in other energetic GRBs, suggesting that the most extreme explosions may be powered by structured jets launched by a common central engine.

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Dr. James Gillanders

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Calculations of multipole transitions in Sn II for kilonova analysis

Authors:

Panning for gold, but finding helium: Discovery of the ultra-stripped supernova SN 2019wxt from gravitational-wave follow-up observations

Authors:

Modelling the spectra of the kilonova AT2017gfo -- II: Beyond the photospheric epochs

Authors:

A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A

Authors:

A structured jet explains the extreme GRB 221009A.

Authors:

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Dr. James Gillanders

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Calculations of multipole transitions in Sn II for kilonova analysis

Authors:

Panning for gold, but finding helium: Discovery of the ultra-stripped supernova SN 2019wxt from gravitational-wave follow-up observations

Authors:

Modelling the spectra of the kilonova AT2017gfo -- II: Beyond the photospheric epochs

Authors:

A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A

Authors:

A structured jet explains the extreme GRB 221009A.

Authors:

Abstract: