Gamma-ray astronomy

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Constraints on short gamma-ray burst physics and their host galaxies from systematic radio follow-up campaigns

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 532:2 (2024) 2820-2831

Authors:

SI Chastain, AJ van der Horst, GE Anderson, L Rhodes, D d’Antonio, ME Bell, RP Fender, PJ Hancock, A Horesh, C Kouveliotou, KP Mooley, A Rowlinson, SD Vergani, RAMJ Wijers, PA Woudt
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H.E.S.S. observations of the 2021 periastron passage of PSR B1259-63/LS 2883

Astronomy & Astrophysics EDP Sciences 687 (2024) a219

Authors:

F Aharonian, F Ait Benkhali, J Aschersleben, H Ashkar, M Backes, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, K Bernlöhr, M Böttcher, C Boisson, J Bolmont, M de Bony de Lavergne, J Borowska, M Bouyahiaoui, R Brose, A Brown, F Brun, B Bruno, T Bulik, C Burger-Scheidlin, S Caroff, S Casanova, J Celic, M Cerruti, T Chand, S Chandra, A Chen, J Chibueze, O Chibueze, G Cotter, J Damascene Mbarubucyeye, J Devin, J Djuvsland, A Dmytriiev, K Egberts, S Einecke, J-P Ernenwein, G Fontaine, S Funk, S Gabici, YA Gallant, D Glawion, JF Glicenstein, P Goswami, G Grolleron, L Haerer, B Heß, W Hofmann, TL Holch, M Holler, Zhiqiu Huang, M Jamrozy, F Jankowsky, V Joshi, I Jung-Richardt, E Kasai, K Katarzyński, D Khangulyan, R Khatoon, B Khélifi, W Kluźniak, Nu Komin, K Kosack, D Kostunin, A Kundu, RG Lang, S Le Stum, F Leitl, A Lemière, M Lemoine-Goumard, J-P Lenain, F Leuschner, J Mackey, D Malyshev, G Martí-Devesa, R Marx, A Mehta, PJ Meintjes, A Mitchell, R Moderski, L Mohrmann, A Montanari, E Moulin, T Murach, M de Naurois, J Niemiec, S Ohm, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, RD Parsons, U Pensec, G Peron, DA Prokhorov, G Pühlhofer, M Punch, A Quirrenbach, M Regeard, A Reimer, O Reimer, I Reis, H Ren, F Rieger, B Rudak, E Ruiz-Velasco, V Sahakian, H Salzmann, A Santangelo, M Sasaki, J Schäfer, F Schüssler, HM Schutte, JNS Shapopi, S Spencer, Ł Stawarz, R Steenkamp, S Steinmassl, C Steppa, K Streil, I Sushch, T Takahashi, T Tanaka, AM Taylor, R Terrier, C Thorpe-Morgan, M Tluczykont, T Unbehaun, C van Eldik, B van Soelen, M Vecchi, C Venter, J Vink, T Wach, SJ Wagner, F Werner, A Wierzcholska, M Zacharias, AA Zdziarski, A Zech, N Żywucka
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Fast X-ray/IR observations of the black hole transient Swift~J1753.5--0127: from an IR lead to a very long jet lag

(2024)

Authors:

Alberto Ulgiati, Federico Maria Vincentelli, Piergiorgio Casella, Alexandra Veledina, Thomas Maccarone, David Russell, Phil Uttley, Filippo Ambrosino, Maria Cristina Baglio, Matteo Imbrogno, Andrea Melandri, Sara Elisa Motta, Kiran O'Brien, Andrea Sanna, Tariq Shahbaz, Diego Altamirano, Rob Fender, Dipankar Maitra, Julien Malzac
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A disc wind origin for the optical spectra of dwarf novae in outburst

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 532:1 (2024) 1199-1211

Authors:

Yusuke Tampo, Christian Knigge, Knox S Long, James H Matthews, Noel Castro Segura
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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.
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