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Euclid: The Early Release Observations Lens Search Experiment

(2024)

Authors:

JA Acevedo Barroso, CM O'Riordan, B Clément, C Tortora, TE Collett, F Courbin, R Gavazzi, RB Metcalf, V Busillo, IT Andika, R Cabanac, HM Courtois, J Crook-Mansour, L Delchambre, G Despali, LR Ecker, A Franco, P Holloway, N Jackson, K Jahnke, G Mahler, L Marchetti, P Matavulj, A Melo, M Meneghetti, LA Moustakas, O Müller, AA Nucita, A Paulino-Afonso, J Pearson, K Rojas, C Scarlata, S Schuldt, S Serjeant, D Sluse, SH Suyu, M Vaccari, A Verma, G Vernardos, M Walmsley, H Bouy, GL Walth, DM Powell, M Bolzonella, J-C Cuillandre, M Kluge, T Saifollahi, M Schirmer, C Stone, A Acebron, L Bazzanini, A Díaz-Sánchez, NB Hogg, LVE Koopmans, S Kruk, L Leuzzi, A Manjón-García, F Mannucci, BC Nagam, R Pearce-Casey, L Scharré, J Wilde, B Altieri, A Amara, S Andreon, N Auricchio, C Baccigalupi, M Baldi, A Balestra, S Bardelli, A Basset, P Battaglia, R Bender, D Bonino, E Branchini, M Brescia, J Brinchmann, A Caillat, S Camera, GP Candini, V Capobianco, C Carbone, J Carretero, S Casas, M Castellano, G Castignani, S Cavuoti, A Cimatti, C Colodro-Conde, G Congedo, CJ Conselice, L Conversi, Y Copin, L Corcione, M Cropper, A Da Silva, H Degaudenzi, G De Lucia, J Dinis, F Dubath, X Dupac, S Dusini, M Farina, S Farrens, S Ferriol, M Frailis, E Franceschi, S Galeotta, B Garilli, K George, W Gillard, B Gillis, C Giocoli, P Gómez-Alvarez, A Grazian, F Grupp, L Guzzo, SVH Haugan, H Hoekstra, W Holmes, I Hook, F Hormuth, A Hornstrup, M Jhabvala, B Joachimi, E Keihänen, S Kermiche, A Kiessling, B Kubik, M Kunz, H Kurki-Suonio, D Le Mignant, S Ligori, PB Lilje, V Lindholm, I Lloro, G Mainetti, E Maiorano, O Mansutti, S Marcin, O Marggraf, M Martinelli, N Martinet, F Marulli, R Massey, E Medinaceli, M Melchior, Y Mellier, E Merlin, G Meylan, M Moresco, L Moscardini, E Munari, R Nakajima, C Neissner, RC Nichol, S-M Niemi, JW Nightingale, C Padilla, S Paltani, F Pasian, K Pedersen, WJ Percival, V Pettorino, S Pires, G Polenta, M Poncet, LA Popa, L Pozzetti, F Raison, R Rebolo, A Renzi, J Rhodes, G Riccio, E Romelli, M Roncarelli, E Rossetti, R Saglia, Z Sakr, AG Sánchez, D Sapone, P Schneider, T Schrabback, A Secroun, G Seidel, S Serrano, C Sirignano, G Sirri, J Skottfelt, L Stanco, J Steinwagner, P Tallada-Crespí, D Tavagnacco, AN Taylor, I Tereno, R Toledo-Moreo, F Torradeflot, I Tutusaus, EA Valentijn, L Valenziano, T Vassallo, Y Wang, J Weller, E Zucca, C Burigana, V Scottez, M Viel

A Radio Flare in the Long-lived Afterglow of the Distant Short GRB 210726A: Energy Injection or a Reverse Shock from Shell Collisions?

The Astrophysical Journal American Astronomical Society 970:2 (2024) 139

Authors:

Genevieve Schroeder, Lauren Rhodes, Tanmoy Laskar, Anya Nugent, Alicia Rouco Escorial, Jillian C Rastinejad, Wen-fai Fong, Alexander J van der Horst, Péter Veres, Kate D Alexander, Alex Andersson, Edo Berger, Peter K Blanchard, Sarah Chastain, Lise Christensen, Rob Fender, David A Green, Paul Groot, Ian Heywood, Assaf Horesh, Luca Izzo, Charles D Kilpatrick, Elmar Körding, Amy Lien

Abstract:

We present the discovery of the radio afterglow of the short gamma-ray burst (GRB) 210726A, localized to a galaxy at a photometric redshift of z ∼ 2.4. While radio observations commenced ≲1 day after the burst, no radio emission was detected until ∼11 days. The radio afterglow subsequently brightened by a factor of ∼3 in the span of a week, followed by a rapid decay (a “radio flare”). We find that a forward shock afterglow model cannot self-consistently describe the multiwavelength X-ray and radio data, and underpredicts the flux of the radio flare by a factor of ≈5. We find that the addition of substantial energy injection, which increases the isotropic kinetic energy of the burst by a factor of ≈4, or a reverse shock from a shell collision are viable solutions to match the broadband behavior. At z ∼ 2.4, GRB 210726A is among the highest-redshift short GRBs discovered to date, as well as the most luminous in radio and X-rays. Combining and comparing all previous radio afterglow observations of short GRBs, we find that the majority of published radio searches conclude by ≲10 days after the burst, potentially missing these late-rising, luminous radio afterglows.

ANDES, the high resolution spectrograph for the ELT: science goals, project overview, and future developments

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13096 (2024) 1309613-1309613-26

Authors:

A Marconi, M Abreu, V Adibekyan, V Alberti, S Albrecht, J Alcaniz, M Aliverti, C Allende Prieto, JD Alvarado-Gomez, CS Alves, PJ Amado, M Amate, MI Andersen, S Antoniucci, E Artigau, C Bailet, C Baker, V Baldini, A Balestra, SA Barnes, F Baron, SCC Barros, SM Bauer, M Beaulieu, O Bellido-Tirado, B Benneke, T Bensby, EA Bergin, P Berio, K Biazzo, L Bigot, A Bik, JL Birkby, N Blind, O Boebion, I Boisse, E Bolmont, JS Bolton, M Bonaglia, X Bonfils, L Bonhomme, F Borsa, J-C Bouret, A Brandeker, W Brandner, CH Broeg, M Brogi, D Brousseau, A Brucalassi, J Brynnel, LA Buchhave, DF Buscher, L Cabona, A Cabral, G Calderone, R Calvo-Ortega, F Cantalloube, BL Canto Martins, L Carbonaro, Y Caujolle, G Chauvin, B Chazelas, A-L Cheffot, YS Cheng, A Chiavassa, L Christensen, R Cirami, M Cirasuolo, NJ Cook, RJ Cooke, I Coretti, S Covino, N Cowan, G Cresci, S Cristiani, V Cunha Parro, G Cupani, V D'Odorico, K Dadi, I de Castro Leão, A De, JR De Medeiros, F Debras, M Debus, A Delorme, O Demangeon, F Derie, M Dessauges-Zavadsky, P Di Marcantonio, S Di Stefano, F Dionies, A Domiciano de Souza, R Doyon, J Dunn, S Egner, D Ehrenreich, JP Faria, D Ferruzzi, C Feruglio, M Fisher, A Fontana, BS Frank, C Fuesslein, M Fumagalli, T Fusco, J Fynbo, O Gabella, W Gaessler, E Gallo, X Gao, L Genolet, M Genoni, P Giacobbe, E Giro, RS Gonçalves, OA Gonzalez, JI González-Hernández, C Gouvret, F Gracia Témich, MG Haehnelt, C Haniff, A Hatzes, R Helled, HJ Hoeijmakers, I Hughes, P Huke, Y Ivanisenko, AS Järvinen, SP Järvinen, A Kaminski, J Kern, J Knoche, A Kordt, H Korhonen, AJ Korn, D Kouach, G Kowzan, L Kreidberg, M Landoni, AA Lanotte, A Lavail, B Lavie, D Lee, M Lehmitz, J Li, W Li, J Liske, C Lovis, S Lucatello, D Lunney, MJ MacIntosh, N Madhusudhan, L Magrini, R Maiolino, J Maldonado, L Malo, AWS Man, T Marquart, CMJ Marques, EL Marques, P Martinez, A Martins, CJAP Martins, JHC Martins, P Maslowski, C Mason, E Mason, RA McCracken, MAF Melo E Sousa, P Mergo, G Micela, D Milaković, P Mollière, MA Monteiro, D Montgomery, C Mordasini, J Morin, A Mucciarelli, MT Murphy, M N'Diaye, N Nardetto, B Neichel, N Neri, AT Niedzielski, E Niemczura, B Nisini, L Nortmann, P Noterdaeme, NJ Nunes, L Oggioni, F Olchewsky, E Oliva, H Önel, L Origlia, G Östlin, NN-Q Ouellette, E Pallé, P Papaderos, G Pariani, L Pasquini, J Peñate Castro, F Pepe, C Peroux, L Perreault Levasseur, S Perruchot, P Petit, O Pfuhl, L Pino, J Piqueras, N Piskunov, A Pollo, K Poppenhaeger, M Porru, J Puschnig, A Quirrenbach, E Rauscher, R Rebolo, EMA Redaelli, S Reffert, DT Reid, A Reiners, P Richter, M Riva, S Rivoire, C Rodríguez-López, IU Roederer, D Romano, M Roth, S Rousseau, J Rowe, A Saccardi, S Salvadori, N Sanna, NC Santos, P Santos Diaz, J Sanz-Forcada, M Sarajlic, J-F Sauvage, D Savio, A Scaudo, S Schäfer, RP Schiavon, TM Schmidt, C Selmi, R Simoes, A Simonnin, S Sivanandam, M Sordet, R Sordo, F Sortino, D Sosnowska, SG Sousa, A Spang, R Spiga, E Stempels, JRY Stevenson, KG Strassmeier, A Suárez Mascareño, A Sulich, X Sun, NR Tanvir, F Tenegi-Sanginés, S Thibault, SJ Thompson, P Tisserand, A Tozzi, M Turbet, J-P Véran, P Vallée, I Vanni, R Varas, A Vega-Moreno, KA Venn, A Verma, J Vernet, M Viel, G Wade, C Waring, M Weber, J Weder, B Wehbé, J Weingrill, M Woche, M Xompero, E Zackrisson, A Zanutta, MR Zapatero Osorio, M Zechmeister, J Zimara

Galaxy Zoo DESI: large-scale bars as a secular mechanism for triggering AGNs

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 532:2 (2024) 2320-2330

Authors:

Izzy L Garland, Mike Walmsley, Maddie S Silcock, Leah M Potts, Josh Smith, Brooke D Simmons, Chris J Lintott, Rebecca J Smethurst, James M Dawson, William C Keel, Sandor Kruk, Kameswara Bharadwaj Mantha, Karen L Masters, David O’Ryan, Jürgen J Popp, Matthew R Thorne

Discovery of the Optical and Radio Counterpart to the Fast X-Ray Transient EP 240315a

The Astrophysical Journal Letters American Astronomical Society 969:1 (2024) L14

Authors:

JH Gillanders, L Rhodes, S Srivastav, F Carotenuto, J Bright, ME Huber, HF Stevance, SJ Smartt, KC Chambers, T-W Chen, R Fender, A Andersson, AJ Cooper, PG Jonker, FJ Cowie, T de Boer, N Erasmus, MD Fulton, H Gao, J Herman, C-C Lin, T Lowe, EA Magnier, H-Y Miao

Abstract:

Fast X-ray Transients (FXTs) are extragalactic bursts of soft X-rays first identified ≳10 yr ago. Since then, nearly 40 events have been discovered, although almost all of these have been recovered from archival Chandra and XMM-Newton data. To date, optical sky surveys and follow-up searches have not revealed any multiwavelength counterparts. The Einstein Probe, launched in 2024 January, has started surveying the sky in the soft X-ray regime (0.5–4 keV) and will rapidly increase the sample of FXTs discovered in real time. Here we report the first discovery of both an optical and radio counterpart to a distant FXT, the fourth source publicly released by the Einstein Probe. We discovered a fast-fading optical transient within the 3′ localization radius of EP 240315a with the all-sky optical survey ATLAS, and our follow-up Gemini spectrum provides a redshift, z = 4.859 ± 0.002. Furthermore, we uncovered a radio counterpart in the S band (3.0 GHz) with the MeerKAT radio interferometer. The optical (rest-frame UV) and radio luminosities indicate that the FXT most likely originates from either a long gamma-ray burst or a relativistic tidal disruption event. This may be a fortuitous early mission detection by the Einstein Probe or may signpost a mode of discovery for high-redshift, high-energy transients through soft X-ray surveys, combined with locating multiwavelength counterparts.