A Real-Time Jet Laboratory in Swift J1727.8-1613

Publications of the Astronomical Society of Australia Cambridge University Press (CUP) (2026) 1-28

Authors:

Callan M Wood, James CA Miller-Jones, Arash Bahramian, Steven J Tingay, Sara E Motta, Hongmin Cao, Thomas D Russell, Francesco Carotenuto, Pikky Atri, Diego Altamirano, Alexandra J Tetarenko, Rob Fender, Elmar Körding, Dipankar Maitra, Sera Markoff, David M Russell, Gregory R Sivakoff, Roberto Soria, Valeriu Tudose

Abstract:

Abstract Multi-wavelength observations of low-mass X-ray binaries (LMXBs) during bright outbursts reveal many details about the coupling of their inflows and outflows. However, only high angular resolution radio observations are able to resolve and track the motion and variability of individual jet ejecta. We present the results of our intensive VLBI campaign on the black-hole low-mass X-ray binary (LMXB) Swift J1727.8-1613 during its 2023-2024 outburst. We observed the repeated quenching and re-establishment of the highly-extended continuous core jet during several transitions between hard-intermediate and soft-intermediate states, and the repeated ejection of transient jets. Using time-dependent visibility model fitting, we tracked the motion of nine discrete jet knots, obtaining some of the most precise measurements of transient jet proper motions and ejection dates in an LMXB. These ejecta were only detectable for a short time with VLBI, and some showed rapid intra-observation flux density variability that was not captured in image reconstructions. For the first time, we use time-dependent visibility modelling to fit a piecewise model for the jet knot flux densities, allowing us to create complex, non-parametric light curves of their intra-observation variability. We observed the launching of multiple ejecta across several state transitions, however, we could not identify a consistent signature of jet ejection in the available X-ray intensity or hardness data. We constrained the intrinsic speeds and bulk Lorentz factors of the jet knots, finding that Swift J1727.8-1613 launched both mildly relativistic (βΓ<1) and highly relativistic (βΓ>2) ejecta throughout its outburst. We used their proper motions to constrain a posterior distribution for the maximum inclination angle of the jet axis, which had 50th, 84th, and 99th percentiles of 40°, 50°, and 66°, respectively. These unique observations of the repeated ejection of transient jets by a single LMXB reveal that fixed parameters such as black-hole mass, black-hole spin, and spin-orbit misalignment do not uniquely determine the varying properties of transient jets, particularly their speeds and Lorentz factors.

A Real-Time Jet Laboratory in Swift J1727.8-1613

(2026)

Authors:

Callan M Wood, James CA Miller-Jones, Arash Bahramian, Steven J Tingay, Sara E Motta, Hongmin Cao, Thomas D Russell, Francesco Carotenuto, Pikky Atri, Diego Altamirano, Alexandra J Tetarenko, Rob Fender, Elmar Körding, Dipankar Maitra, Sera Markoff, David M Russell, Gregory R Sivakoff, Roberto Soria, Valeriu Tudose

BlackHolistic 2026

Nature Astronomy Springer Nature 10:8 (2026) 1087-1088

Authors:

Rob Fender, Jane Dai, Erin Kara, Sera Markoff, Francesca Panessa, Jiri Svoboda, Heino Falcke

Abstract:

Accretion and relativistic jet formation in black holes occur across a wide range of their masses, revealing qualitative and quantitative similarities that connect the entire population of black holes. In March 2026, researchers from all areas across the black hole mass spectrum met in Oxford to educate, explore and forge new research directions.

Charge readout electronics for the DUNE horizontal drift far detector: design and performance in ProtoDUNE-HD

Journal of Instrumentation 21:08 (2026)

Authors:

S Abbaslu, F Abd Alrahman, A Abed Abud, R Acciarri, LP Accorsi, MA Acero, MR Adames, G Adamov, M Adamowski, K Adhikari, C Adriano, K Agudelo-Jaramillo, F Akbar, F Alemanno, NS Alex, L Aliaga Soplin, A Alqaisi, M Alrashed, A Alton, R Alvarez, T Alves, A Aman, H Amar, R Amarinei, P Amedo, EPM Amorim, J Anderson, DA Andrade, C Andreopoulos, M Andreotti, MP Andrews, F Andrianala, S Andringa, F Anjarazafy, S Ansarifard, D Antic, A Antonakis, A Aranda-Fernandez, T Araya-Santander, L Arellano, E Arrieta Diaz, MA Arroyave, M Artero Pons, J Asaadi, M Ascencio, A Ashkenazi, L Asquith, E Atkin, D Auguste, A Aurisano, V Aushev, D Autiero, D Ávila Gómez, MB Azam, F Azfar, JJ Back, Y Bae, I Bagaturia, L Bagby, H Bagdu, S Balasubramanian, A Balboni, P Baldi, W Baldini, E Baldo, J Baldonedo, B Baller, B Bambah, F Barao, D Barbu, G Barenboim, P Barham Alzás, GJ Barker, W Barkhouse, E Barlas Yucel, G Barr, W Barrett, D Barrow, JL Barrow, A Basharina-Freshville, A Bashyal, V Basque, M Bassani, D Basu, L Bathe-Peters, JG Batista Sigolo, JBR Battat, F Battisti, J Bautista, F Bay, JLL Bazo Alba, JF Beacom, E Bechetoille, A Beever, B Behera, E Belchior, B Bell, G Bell, L Bellantoni, G Bellettini, V Bellini, O Beltramello, C Benitez Montiel, D Benjamin, K Benslama, F Bento Neves, J Berger, S Berkman, J Bermudez, J Bernal, P Bernardini, A Bersani, E Bertholet, E Bertolini, S Bertolucci, M Betancourt, A Betancur Rodríguez, Y Bezawada, AT Bezerra, A Bhat, V Bhatnagar, M Bhattacharjee, S Bhattacharjee, M Bhattacharya, S Bhuller, B Bhuyan, S Biagi, J Bian, K Biery, B Bilki, A Binau, M Bishai, P Bishop, A Blake, A Blanchet, FD Blaszczyk, GC Blazey, E Blucher, A Bodek, B Bogart, J Boissevain, T Bolton, L Bomben, M Bonesini, C Bonilla-Diaz, A Booth, F Boran, C Borden, R Borges Merlo, D Borodulina, N Bostan, G Botogoske, B Bottino, R Bouet, J Boza, B Brahma, D Brailsford, F Bramati, A Branca, A Brandt, J Bremer, SJ Brice, S Brickner, V Brio, C Brizzolari, C Bromberg, J Brooke, A Bross, G Brunetti, MB Brunetti, N Buchanan, H Budd, J Buergi, A Bundock, D Burgardt, S Butchart, G Caceres V., R Calabrese, R Calabrese, J Calcutt, L Calivers, S Calvez, E Calvo, A Caminata, AF Camino, W Campanelli, A Campani, A Campos Benitez, N Canci, J Capó, I Caracas, D Caratelli, D Carber, G Carini, MF Carneiro, P Carniti, I Caro Terrazas, H Carranza, N Carrara, L Carroll, A Carter, J Carvalho Roberto, E Casarejos, D Casazza, JF Castaño Forero, FA Castaño, C Castromonte, E Catano-Mur, C Cattadori, F Cavalier, F Cavanna, S Centro, G Cerati, C Cerna, A Cervelli, A Cervera Villanueva, J Chakrani, M Chalifour, A Chappell, A Chatterjee, B Chauhan, C Chavez Barajas, H Chen, M Chen, WC Chen, Y Chen, Z Chen, D Cherdack, SS Chhibra, C Chi, F Chiapponi, R Chirco, N Chitirasreemadam, K Cho, S Choate, G Choi, D Chokheli, PS Chong, O Chow, B Chowdhury, D Christian, E Church, MF Cicala, M Cicerchia, V Cicero, R Ciolini, P Clarke, G Cline, AG Cocco, JAB Coelho, A Cohen, J Collazo, J Collot, H Combs, JM Conrad, L Conti, T Contreras, M Convery, K Conway, S Copello, P Cova, C Cox, L Cremonesi, JI Crespo-Anadón, M Crisler, E Cristaldo, J Crnkovic, G Crone, R Cross, T Cruz, A Cudd, C Cuesta, Y Cui, F Curciarello, D Cussans, O Dalager, W Dallaway, R D'Amico, H da Motta, ZA Dar, R Darby, L Da Silva Peres, Q David, GS Davies, S Davini, J Dawson, R De Aguiar, KH De Barros, P Debbins, MP Decowski, A de Gouvêa, PC De Holanda, P De Jong, P Del Amo Sanchez, G De Lauretis, A Delbart, M Delgado, A Dell'Acqua, G Delle Monache, N Delmonte, P De Lurgio, G De Matteis, JRT de Mello Neto, APA De Mendonca, DM DeMuth, S Dennis, C Densham, P Denton, GW Deptuch, V De Romeri, JP Detje, J Devine, K Dhanmeher, R Dharmapalan, M Dias, A Diaz, JS Díaz, F Díaz, F Di Capua, A Di Domenico, S Di Domizio, S Di Falco, D Di Ferdinando, L Di Giulio, P Ding, L Di Noto, E Diociaiuti, G Di Sciascio, C Distefano, R Di Stefano, R Diurba, M Diwan, Z Djurcic, S Dolan, M Dolce, MJ Dolinski, D Domenici, S Dominguez, S Donati, S Doran, D Douglas, TA Doyle, F Drielsma, DJ Drobner, D Duchesneau, K Duffy, K Dugas, P Dunne, S Durando, B Dutta, DA Dwyer, AS Dyshkant, S Dytman, M Eads, A Earle, S Edayath, D Edmunds, J Eisch, S Elias, J Ellis, W Emark, P Englezos, A Ereditato, DT Ergonul, T Erjavec, CO Escobar, JJ Evans, E Ewart, AC Ezeribe, K Fahey, A Falcone, C Fang, M Fani', F Fanomezana, D Faragher, C Farnese, Y Farzan, J Felix, Y Feng, M Ferreira da Silva, E Fialova, L Fields, P Filip, A Filkins, F Filthaut, G Fiorillo, M Fiorini, NF Fiuza De Barros, S Fogarty, W Foreman, B Fossing, J Fowler, J Franc, K Francis, D Franco, J Franklin, J Freeman, J Fried, A Friedland, S Fuess, IK Furic, K Furman, AP Furmanski, R Gaba, A Gabrielli, AM Gago, F Galizzi, H Gallagher, M Galli, N Gallice, V Galymov, E Gamberini, T Gamble, R Gan, R Gandhi, S Ganguly, F Gao, S Gao, A Garcia, D Garcia-Gamez, MÁ García-Peris, V Garcia Pol, S Gardiner, P Gauzzi, G Ge, N Geffroy, B Gelli, S Gent, A Ghosh, T Giammaria, D Gibin, I Gil-Botella, A Gioiosa, S Giovannella, AK Giri, V Giusti, D Gnani, O Gogota, S Gollapinni, K Gollwitzer, RA Gomes, LS Gomez Fajardo, D Gonzalez-Diaz, J Gonzalez-Santome, MC Goodman, S Goswami, C Gotti, J Goudeau, C Grace, E Gramellini, R Gran, P Granger, C Grant, DR Gratieri, G Grauso, P Green, S Greenberg, WC Griffith, A Gruber, K Grzelak, L Gu, W Gu, V Guarino, M Guarise, R Guenette, M Guerzoni, D Guffanti, A Guglielmi, FY Guo, A Gupta, V Gupta, G Gurung, D Gutierrez, P Guzowski, MM Guzzo, S Gwon, A Habig, R Hafeji, L Hagaman, A Hahn, J Hakenmüller, A Hambardzumyan, T Hamernik, P Hamilton, J Hancock, M Handley, F Happacher, B Harris, DA Harris, L Harris, AL Hart, J Hartnell, T Hartnett, T Hasegawa, CM Hasnip, K Hassinin, R Hatcher, S Hawkins, J Hays, M He, A Heavey, KM Heeger, A Heindel, J Heise, K Heller, P Hellmuth, L Henderson, A Hergenhan, J Hernández, MA Hernandez Morquecho, K Herner, V Hewes, A Higuera, K Hildebrandt, A Himmel, E Hinkle, LR Hirsch, J Ho, J Hoefken Zink, J Hoff, A Holin, C Hong, S Horiuchi, GA Horton-Smith, R Hosokawa, T Houdy, B Howard, I Hristova, MS Hronek, Y Hua, J Huang, RG Huang, X Huang, Z Hulcher, A Hussain, G Iles, N Ilic, AM Iliescu, R Illingworth, F Imamoglu, G Ingratta, A Ioannisian, M Ismerio Oliveira, CM Jackson, A Jacobi, V Jain, C James, E James, W Jang, B Jargowsky, D Jena, I Jentz, C Jiang, J Jiang, A Jipa, JH Jo, FR Joaquim, AM Johnson, W Johnson, C Jollet, M Joshi, N Jovancevic, M Judah, CK Jung, KY Jung, T Junk, Y Jwa, M Kabirnezhad, AC Kaboth, I Kadenko, O Kalikulov, D Kalra, M Kandemir, S Kar, C Karagianni, G Karagiorgi, G Karaman, A Karcher, Y Karyotakis, SP Kasetti, L Kashur, A Kauther, N Kazaryan, L Ke, E Kearns, PT Keener, A Kelly, KJ Kelly, R Keloth, O Kemularia, J Kerby, Y Kermaidic, W Ketchum, SH Kettell, N Khan, A Khvedelidze, D Kim, J Kim, MJ Kim, S Kim, B King, M King, M Kirby, A Kish, J Klein, J Kleykamp, T Kobilarcik, L Koch, K Koehler, LW Koerner, DH Koh, K Kong, M Kordosky, VA Kostelecký, I Kotler, M Kramer, F Krennrich, T Kroupova, S Kubota, M Kubu, VA Kudryavtsev, G Kufatty, A Kumar, J Kumar, M Kumar, P Kumar, S Kumaran, J Kunzmann, V Kus, T Kutter, J Kvasnicka, T Labree, M Lachat, T Lackey, I Lalău, A Lambert, BJ Land, CE Lane, N Lane, K Lang, M Langstaff, F Lanni, S Lanzi, J Larkin, P Lasorak, D Last, G Laurenti, E Lavaut, W Lavrijsen, H Lay, I Lazanu, R LaZur, M Lazzaroni, S Leardini, J Learned, G Lehmann Miotto, R Lehnert, M Leitner, H Lemoine, D Leon Silverio, LM Lepin, JD Lewis, J-Y Li, SW Li, Y Li, RCR Lima, R Lima, CS Lin, D Lindebaum, S Linden, A Lister, BR Littlejohn, J Liu, Y Liu, M Lkhagvadorj, S Lockwitz, I Lomidze, J Lopez, I López de Rego, N López-March, A Lopez Moreno, JM LoSecco, A Lozano Sanchez, X-G Lu, KB Luk, X Luo, G Lupi, E Luppi, AA Machado, P Machado, CT Macias, JR Macier, A Madorsky, S Magill, C Magueur, K Mahn, A Maio, N Majeed, K Majumdar, A Malige, S Mameli, M Man, RC Mandujano, J Maneira, S Manly, K Manolopoulos, M Manrique Plata, S Manthey Corchado, L Manzanillas-Velez, E Mao, M Marchan, A Marchionni, D Marfatia, C Mariani, J Maricic, R Marie, F Marinho, AD Marino, T Markiewicz, F Das Chagas Marques, M Marshak, CM Marshall, J Marshall, J Martin, M Martin, L Martina, J Martín-Albo, DA Martinez Caicedo, M Martinez-Casales, F Martínez López, S Martynenko, V Mascagna, A Mastbaum, M Masud, F Matichard, G Matteucci, J Matthews, C Mauger, N Mauri, K Mavrokoridis, I Mawby, T McAskill, N McConkey, B McConnell, KS McFarland, C McGivern, C McGrew, A McNab, C McNulty, J Mead, L Meazza, VCN Meddage, A Medhi, M Mehmood, B Mehta, P Mehta, F Mei, P Melas, L Mellet, TCD Melo, O Mena, DP Méndez, A Menegolli, G Meng, A Mengarelli, ACEA Mercuri, A Meregaglia, G Merino, MD Messier, S Metallo, W Metcalf, M Mewes, H Meyer, T Miao, J Micallef, A Miccoli, G Michna, R Milincic, F Miller, G Miller, W Miller, A Minotti, L Miralles Verge, C Mironov, S Miscetti, P Mishra, SR Mishra, D Mladenov, I Mocioiu, A Mogan, PS Mohan, R Mohanta, TA Mohayai, N Mokhov, J Molina, L Molina Bueno, E Montagna, A Montanari, C Montanari, D Montanari, D Montanino, LM Montaño Zetina, M Mooney, AF Moor, M Moore, Z Moore, B Moreira, D Moreno, G Moreno-Granados, O Moreno-Palacios, L Morescalchi, A Morita, E Motuk, CA Moura, W Mu, L Mualem, J Mueller, M Muether, A Muir, Y Mukhamejanov, A Mukhamejanova, E Muldoon, M Mulhearn, D Munford, LJ Munteanu, H Muramatsu, J Muraz, M Murphy, T Murphy, A Mytilinaki, J Nachtman, Y Nagai, S Nagu, H Nam, D Naples, S Narita, J Nava, D Navas-Nicolás, A Navrer-Agasson, N Nayak, M Nebot-Guinot, A Nehm, JK Nelson, O Neogi, J Nesbit, M Nessi, D Newbold, M Newcomer, D Newmark, L Nguyen, R Nichol, FJ Nicolas-Arnaldos, A Nielsen, A Nikolica, J Nikolov, E Niner, X Ning, K Nishimura, A Norman, A Norrick, F Noto, P Novella, A Nowak, JA Nowak, M Oberling, JP Ochoa-Ricoux, S Oh, SB Oh, A Olivier, T Olson, Y Onel, Y Onishchuk, A Oranday, GP Orebi Gann, AIR Orimogunje, M Osbiston, JE Ossa Sanchez, L O'Sullivan, L Otiniano Ormachea, L Pagani, O Palamara, S Palestini, JM Paley, M Pallavicini, C Palomares, B Pan, S Pan, M Panareo, P Panda, V Pandey, W Panduro Vazquez, E Pantic, V Paolone, A Papadopoulou, R Papaleo, D Papoulias, S Paramesvaran, J Park, J Park, Y Park, S Parke, S Parsa, M Parvu, D Pasciuto, S Pascoli, L Pasqualini, G Patel, JL Paton, C Patrick, L Patrizii, RB Patterson, T Patzak, A Paudel, L Paulucci, Z Pavlovic, G Pawloski, D Payne, A Peake, V Pec, E Pedreschi, SJM Peeters, L Pelegrina-Gutiérrez, W Pellico, E Pennacchio, A Penzo, OLG Peres, YF Perez Gonzalez, L Pérez-Molina, C Pernas, J Perry, D Pershey, G Pessina, G Petrillo, C Petta, R Petti, M Pfaff, V Pia, GM Piacentino, L Pickering, G Piemonti, L Pierini, F Pietropaolo, M Pimenta Sampaio, VL Pimentel, G Pinaroli, S Pincha, J Pinchault, K Pitts, P Plesniak, K Pletcher, K Plows, C Pollack, F Polleri, T Pollmann, F Pompa, X Pons, N Poonthottathil, F Poppi, J Porter, LG Porto Paixão, M Pozzato, R Pradhan, L Prais, T Prakash, M Prest, F Psihas, D Pugnere, D Pullia, X Qian, J Quelin-Lechevranton, JL Raaf, V Radeka, J Rademacker, F Raffaelli, A Rafique, U Rahaman, A Rahe, S Rajagopalan, M Rajaoalisoa, I Rakhno, L Rakotondravohitra, MA Ralaikoto, L Ralte, L Ralte, MA Ramirez Delgado, B Ramson, SS Randriamanampisoa, A Rappoldi, G Raselli, T Rath, P Ratoff, R Raut, R Ray, H Razafinime, RF Razakamiandra, EM Rea, JS Real, B Rebel, R Rechenmacher, M Reggiani-Guzzo, J Reichenbacher, SD Reitzner, E Renner, S Repetto, S Rescia, F Resnati, JV Restrepo Laverde, C Reynolds, S Riboldi, C Riccio, G Riccobene, JS Ricol, M Rigan, A Rikalo, A Ritchie-Yates, D Rivera, A Rivetti, A Robert, E Robles, A Roche, M Roda, D Rodas Rodríguez, MJO Rodrigues, J Rodriguez Rondon, S Rosauro-Alcaraz, P Rosier, D Ross, M Rossella, M Ross-Lonergan, N Roy, P Roy, C Royon, C Rubbia, D Rudik, A Ruggeri, G Ruiz Ferreira, K Rushiya, B Russell, E Sabater Andres, S Sacerdoti, N Saduyev, D Sagar, S Saha, SK Sahoo, N Sahu, S Sakhiyev, P Sala, N Sallin, G Salmoria, S Samanta, MC Sanchez, A Sánchez-Castillo, P Sanchez-Lucas, DA Sanders, S Sanfilippo, G Santoni, D Santoro, N Saoulidou, P Sapienza, I Sarcevic, I Sarra, C Sauer, L Sauer, G Savage, V Savinov, A Scanu, A Scaramelli, T Schefke, H Schellman, S Schifano, P Schlabach, DW Schmitz, AW Schneider, K Scholberg, A Schroeder, A Schukraft, B Schuld, S Schwartz, A Segade, H Segal, E Segreto, A Selyunin, D Senadheera, CR Senise, J Sensenig, SH Seo, D Seppela, MH Shaevitz, P Shanahan, P Sharma, R Kumar, S Sharma Poudel, K Shaw, T Shaw, J Shen, C Shepherd-Themistocleous, J Shi, W Shi, S Shin, S Shivakoti, A Shmakov, I Shoemaker, D Shooltz, R Shrock, M Siden, J Silber, L Simard, J Sinclair, G Sinev, Jaydip Singh, J Singh, L Singh, P Singh, V Singh, S Singh Chauhan, R Sipos, C Sironneau, G Sirri, K Siyeon, K Skarpaas, J Smedley, J Smith, RS Smith-Jones, J Smolik, M Smy, M Snape, EL Snider, P Snopok, M Soares Nunes, H Sobel, M Soderberg, H Sogarwal, CJ Solano Salinas, S Söldner-Rembold, N Solomey, V Solovov, WE Sondheim, T Sonius, M Sorbara, M Sorel, J Soto-Oton, A Sousa, K Soustruznik, D Souza Correia, F Spinella, J Spitz, NJC Spooner, D Stalder, M Stancari, L Stanco, J Steenis, R Stein, HM Steiner, AF Steklain Lisbôa, J Stewart, B Stillwell, J Stock, T Stokes, T Strauss, L Strigari, A Stuart, W Su, A Surdo, L Suter, A Sutton, Y Suvorov, R Svoboda, SK Swain, C Sweeney, B Szczerbinska, AM Szelc, A Sztuc, A Taffara, N Talukdar, J Tamara, HA Tanaka, S Tang, N Taniuchi, AM Tapia Casanova, A Tapper, S Tariq, E Tatar, R Tayloe, AM Teklu, K Tellez Giron Flores, J Tena Vidal, P Tennessen, M Tenti, K Terao, F Terranova, S Teruel, G Testera, A Thea, S Thomas, A Thompson, C Thorpe, M Timalsina, SC Timm, E Tiras, V Tishchenko, S Tiwari, N Todorović, L Tomassetti, A Tonazzo, L Tong, D Torbunov, D Torres Muñoz, M Torti, M Tortola, Y Torun, N Tosi, D Totani, M Toups, C Touramanis, V Trabattoni, D Tran, J Trevor, E Triller, S Trilov, D Trotta, WH Trzaska, Y Tsai, Y-T Tsai, Z Tsamalaidze, KV Tsang, N Tsverava, SZ Tu, S Tufanli, C Tunnell, S Turnberg, J Turner, M Tuzi, M Tzanov, MA Uchida, J Ureña González, J Urheim, T Usher, H Utaegbulam, S Uzunyan, MR Vagins, P Vahle, GA Valdiviesso, E Valencia, R Valentim, Z Vallari, E Vallazza, JWF Valle, R Van Berg, DV Forero, P Van Gemmeren, A Vannozzi, M Van Nuland-Troost, F Varanini, N Vaughan, K Vaziri, A Vázquez-Ramos, J Vega, J Vences, S Ventura, A Verdugo, M Verzocchi, J Vesic, K Vetter, M Vicenzi, H Vieira de Souza, C Vignoli, C Vilela, E Villa, S Viola, B Viren, GV Stenico, R Vizarreta, AP Vizcaya Hernandez, S Vlachos, G Vorobyev, Q Vuong, AV Waldron, L Walker, H Wallace, M Wallach, J Walsh, T Walton, L Wan, B Wang, J Wang, L Wang, MHLS Wang, X Wang, Y Wang, Y Wang, D Warner, L Warsame, MO Wascko, D Waters, A Watson, K Wawrowska, A Weber, CM Weber, M Weber, H Wei, A Weinstein, S Westerdale, M Wetstein, Q Weyrich, K Whalen, AJ White, LH Whitehead, D Whittington, F Wieler, J Wilhelmi, MJ Wilking, A Wilkinson, C Wilkinson, RJ Wilson, P Winter, J Wolcott, J Wolfs, T Wongjirad, A Wood, K Wood, E Worcester, M Worcester, K Wresilo, M Wright, M Wrobel, S Wu, Z Wu, J Wyenberg, BM Wynne, Y Xiao, Z Xie, D Xing, B Yaeggy, A Yahaya, N Yahlali, E Yandel, G Yang, J Yang, T Yang, A Yankelevich, L Yates, U Yevarouskaya, K Yonehara, T Young, B Yu, H Yu, J Yu, K Yu, W Yuan, R Zaki, J Zalesak, L Zambelli, B Zamorano, A Zani, L Zazueta, GP Zeller, J Zennamo, J Zettlemoyer, K Zeug, C Zhang, S Zhang, Y Zhang, L Zhao, M Zhao, K Zhu, ED Zimmerman, S Zucchelli, A Zummo, V Zutshi, R Zwaska, The DUNE collaboration

Abstract:

DUNE (Deep Underground Neutrino Experiment) is a long-baseline neutrino oscillation experiment currently under construction, whose far detectors will be the largest liquid argon time projection chambers ever built. This detector design calls for custom-built cryogenic front-end electronics to meet its performance requirements. This paper describes the charge readout electronics that will be used in the DUNE horizontal drift (HD) far detector and presents performance results using data from the ProtoDUNE-HD detector, a 770 ton liquid argon time projection chamber operated at the CERN Neutrino Platform in 2024 that served as the final prototype of the DUNE HD design.

The Eye of Sauron in SN 2025ngs: A Short-plateau Cousin of SN 1998S with Evidence for a Ring-like Circumstellar Medium

The Astrophysical Journal American Astronomical Society 1006:2 (2026) 230

Authors:

Conor L Ransome, David J Sand, K Azalee Bostroem, Aravind P Ravi, Bhagya M Subrayan, Jennifer E Andrews, Zachary G Lane, Yize Dong, Anya Nugent, Stefano Valenti, Jeniveve Pearson, Manisha Shrestha, Samaporn Tinyanont, Brian Hsu, Moira Andrews, Dominik Bánhidi, Imre Barna Bíró, Collin Christy, István Csányi, Joseph Farah, Noah Franz, Emily T Hoang, Griffin Hosseinzadeh, D Andrew Howell, Daryl Janzen, Saurabh W Jha, Lindsey A Kwok, Chang Liu, Michael Lundquist, Aidan Martas, Curtis McCully, Darshana Mehta, Nicolas E Meza Retamal, Nathan Smith, Tamás Szalai, Sergiy Vasylyev, V Ashley Villar, Kathryn Wynn

Abstract:

Interacting supernovae probe the twilight years of massive stars, exhibiting signatures of interaction between the supernova ejecta and surrounding material expelled from the progenitor. We present the peculiar interacting supernova, SN 2025ngs in NGC 5961 (37.8 Mpc). This transient toes the line between strongly interacting supernovae (Type IIn) and Type IIP supernovae. SN 2025ngs presents photometrically as a short-plateau supernova, with a plateau duration t PT≈70 days. Interaction features subside within a week postexplosion, consistent with the growing number of flash supernovae, giving way to a short period where a typical IIP spectrum is exhibited. Towards the drop off the plateau, interaction features re-emerge, exhibiting complex Hα profiles throughout the rest of the transient evolution. We compare with models of early spectra, finding the abundances generally consistent with a supergiant progenitor with a high mass-loss rate (10−3 M⊙ yr−1). Early, high-resolution spectra reveal a double-horned Hα profile, providing strong evidence for shock interaction with a proximate disk-like circumstellar medium. Spectroscopically, SN 2025ngs closely resembles the luminous SN 1998S, despite photometric differences, with SN 2025ngs having a relatively modest peak magnitude of MV = −17.9 mag, adding another member to the surprisingly diverse 98S-like group.