Related papers: An extremely soft and weak fast X-ray transient as…

A fast X-ray transient from a weak relativistic jet associated with a type Ic-BL supernova

Massive stars end their lives as core-collapse supernovae, amongst which some extremes are broad-lined type Ic supernovae from Wolf-Rayet stars associated with long-duration gamma-ray bursts (LGRBs) having powerful relativistic jets. Their…

High Energy Astrophysical Phenomena · Physics 2025-07-15 H. Sun , W. -X. Li , L. -D. Liu , H. Gao , X. -F. Wang , W. Yuan , B. Zhang , A. V. Filippenko , D. Xu , T. An , S. Ai , T. G. Brink , Y. Liu , Y. -Q. Liu , C. -Y. Wang , Q. -Y. Wu , X. -F. Wu , Y. Yang , B. -B. Zhang , W. -K. Zheng , T. Ahumada , Z. -G. Dai , J. Delaunay , N. Elias-Rosa , S. Benetti , S. -Y. Fu , D. A. Howell , Y. -F. Huang , M. M. Kasliwal , V. Karambelkar , R. Stein , W. -H. Lei , T. -Y. Lian , Z. -K. Peng , D. D. Frederiks , A. V. Ridnaia , D. S. Svinkin , X. -Y. Wang , A. -L. Wang , D. -M. Wei , J. An , M. Andrews , J. -M Bai , C. -Y. Dai , S. A. Ehgamberdiev , Z. Fan , J. Farah , H. -C. Feng , J. P. U. Fynbo , W. -J. Guo , Z. Guo , M. -K. Hu , J. -W. Hu , S. -Q. Jiang , J. -J. Jin , A. Li , J. -D. Li , R. -Z. Li , Y. -F. Liang , Z. -X. Ling , X. Liu , J. -R. Mao , C. McCully , D. Mirzaqulov , M. Newsome , E. Padilla Gonzalez , X. Pan , G. Terreran , S. Tinyanont , B. -T. Wang , L. -Z. Wang , X. -D. Wen , D. -F. Xiang , S. -J. Xue , J. Yang , Z. -P. Zhu , Z. -M. Cai , A. J. Castro-Tirado , F. -S. Chen , H. -L. Chen , T. -X. Chen , W. Chen , Y. -H. Chen , Y. -F. Chen , Y. Chen , H. -Q. Cheng , B. Cordier , C. -Z. Cui , W. -W. Cui , Y. -F. Dai , D. -W. Fan , H. Feng , J. Guan , D. -W. Han , D. -J. Hou , H. -B. Hu , M. -H. Huang , J. Huo , S. -M. Jia , Z. -Q. Jia , B. -W. Jiang , C. -C. Jin , G. Jin , E. Kuulkers , C. -K. Li , D. -Y. Li , J. -F. Li , L. -H. Li , M. -S. Li , W. Li , Z. -D. Li , C. -Z Liu , H. -Y. Liu , H. -Q. Liu , M. -J. Liu , F. -J. Lu , L. -D. Luo , J. Ma , X. Mao , K. Nandra , P. O'Brien , H. -W. Pan , A. Rau , N. Rea , J. Sanders , L. -M. Song , S. -L. Sun , X. -J. Sun , Y. -Y. Tan , Q. -J. Tang , Y. -H. Tao , H. Wang , J. Wang , L. Wang , W. -X. Wang , Y. -L. Wang , Y. -S. Wang , D. -R. Xiong , H. -T. Xu , J. -J. Xu , X. -P. Xu , Y. -F. Xu , Z. Xu , C. -B. Xue , Y. -L. Xue , A. -L. Yan , H. -N. Yang , X. -T. Yang , Y. -J. Yang , C. Zhang , J. Zhang , M. Zhang , S. -N. Zhang , W. -D. Zhang , W. -J. Zhang , Y. -H. Zhang , Z. Zhang , Z. Zhang , Z. -L. Zhang , D. -H. Zhao , H. -S. Zhao , X. -F. Zhao , Z. -J. Zhao , Y. -L. Zhou , Y. -X. Zhu , Z. -C. Zhu , H. Zou

The soft X-ray transient EP241021a: A cosmic explosion with a complex off-axis jet and cocoon from a massive progenitor

X-ray flashes (XRFs) are fast X-ray transients thought to be softer analogs of gamma-ray bursts (GRBs). With its soft X-ray sensitivity, the Einstein Probe (EP) provides a unique opportunity to study these events. We report multiwavelength…

High Energy Astrophysical Phenomena · Physics 2025-11-12 Giulia Gianfagna , Luigi Piro , Gabriele Bruni , Aishwarya Linesh Thakur , Hendrik Van Eerten , Maria D. Caballero-García , Alberto Castro-Tirado , Yong Chen , Ye-hao Cheng , Maria Gritsevich , Sergiy Guziy , Han He , You-Dong Hu , Shumei Jia , Zhixing Ling , Elisabetta Maiorano , Rosita Paladino , Shashi B. Pandey , Roberta Tripodi , Andrea Rossi , Rubén Sánchez-Ramírez , Shuaikang Yang , Jianghui Yuan , Weimin Yuan , Chen Zhang

EP250827b/SN 2025wkm: An X-ray Flash-Supernova Powered by a Central Engine and Circumstellar Interaction

We present the discovery of EP250827b/SN 2025wkm, an X-ray Flash (XRF) discovered by the Einstein Probe (EP), accompanied by a broad-line Type Ic supernova (SN Ic-BL) at $z = 0.1194$. EP250827b possesses a prompt X-ray luminosity of $\sim…

High Energy Astrophysical Phenomena · Physics 2026-05-07 Gokul P. Srinivasaragavan , Dongyue Li , Xander J. Hall , Ore Gottlieb , Genevieve Schroeder , Heyang Liu , Brendan O'Connor , Chichuan Jin , Mansi Kasliwal , Tomás Ahumada , Qinyu Wu , Christopher L. Fryer , Annabelle E. Niblett , Dong Xu , Maria Edvige Ravasio , Grace Daja , Wenxiong Li , Shreya Anand , Anna Y. Q. Ho , Hui Sun , Daniel A. Perley , Lin Yan , Eric Burns , S. Bradley Cenko , Jesper Sollerman , Nikhil Sarin , Anthony L. Piro , Amar Aryan , M. Coleman Miller , Jie An , Tao An , Moira Andrews , Jule Augustin , Eric C. Bellm , Aleksandra Bochenek , Malte Busmann , Krittapas Chanchaiworawit , Huaqing Chen , Maria D. Caballero-García , Alberto J. Castro-Tirado , Ali Esamdin , Jennifer Faba-Moreno , Joseph Farah , Emilio Fernández-García , Shaoyu Fu , Johan P. U. Fynbo , Julius Gassert , Estefania Padilla Gonzalez , Ignacio Pérez-García , Matthew Graham , Maria Gritsevich , Daniel Gruen , Sergiy Guziy , D. Andrew Howell , Linbo He , Jingwei Hu , You-Dong Hu , Abdusamatjan Iskandar , Joahan Castaneda Jaims , Ji-An Jiang , Ning Jiang , Shuaijiao Jiang , Runduo Liang , Zhixing Ling , Jialian Liu , Xing Liu , Yuan Liu , Frank J. Masci , Curtis McCully , Megan Newsome , Kanthanakorn Noysena , Shashi B. Pandey , Kangrui Ni , Antonella Palmese , Han-Long Peng , Josiah Purdum , Yu-Jing Qin , Sam Rose , Ben Rusholme , Rubén Sánchez-Ramírez , Cassie Sevilla , Roger Smith , Yujia Song , Niharika Sravan , Robert Stein , Constantin Tabor , Giacomo Terreran , Samaporn Tinyanont , Pablo Vega , Letian Wang , Tinggu Wang , Xiaofeng Wang , Siyu Wu , Xuefeng Wu , Kathryn Wynn , Yunfei Xu , Shengyu Yan , Weimin Yuan , Binbin Zhang , Chen Zhang , Zipei Zhu , Xiaoxiong Zuo , Gursimran Bhullar

EP 250108a/SN 2025kg: Observations of the most nearby Broad-Line Type Ic Supernova following an Einstein Probe Fast X-ray Transient

With a small sample of fast X-ray transients (FXTs) with multi-wavelength counterparts discovered to date, the progenitors of FXTs and their connections to gamma-ray bursts (GRBs) and supernovae (SNe) remain ambiguous. Here, we present…

High Energy Astrophysical Phenomena · Physics 2025-06-19 J. C. Rastinejad , A. J. Levan , P. G. Jonker , C. D. Kilpatrick , C. L. Fryer , N. Sarin , B. P. Gompertz , C. Liu , R. A. J. Eyles-Ferris , W. Fong , E. Burns , J. H. Gillanders , I. Mandel , D. B. Malesani , P. T. O'Brien , N. R. Tanvir , K. Ackley , A. Aryan , F. E. Bauer , S. Bloemen , T. de Boer , C. R. Bom , J. A. Chacon , K. Chambers , T. -W. Chen , A. A. Chrimes , J. N. D. van Dalen , V. D'Elia , M. De Pasquale , M. D. Fulton , P. J. Groot , R. Gupta , D. H. Hartmann , A. P. C. van Hoof , M. E. Huber , L. Izzo , W. Jacobson-Galan , P. Jakobsson , A. Kong , T. Laskar , T. B. Lowe , E. A. Magnier , E. Maiorano , A. Martin-Carrillo , L. Mas-Ribas , D. Mata Sanchez , M. Nicholl , C. J. Nixon , S. R. Oates , G. Paek , J. Palmerio , D. Paris , D. L. A. Pieterse , G. Pugliese , J. A. Quirola Vasquez , J. van Roestel , A. Rossi , A. Rouco Escorial. R. Salvaterra , B. Schneider , S. J. Smartt , K. Smith , I. A. Smith , S. Srivastav , M. A. P. Torres , C. Ventura , P. Vreeswijk , R. Wainscoat , Y. -J. Yang , S. Yang

EP240801a/XRF 240801B: An X-ray Flash Detected by the Einstein Probe and Implications of its Multiband Afterglow

We present multiband observations and analysis of EP240801a, a low-energy, extremely soft gamma-ray burst (GRB) discovered on August 1, 2024 by the Einstein Probe (EP) satellite, with a weak contemporaneous signal also detected by…

High Energy Astrophysical Phenomena · Physics 2025-03-07 Shuai-Qing Jiang , Dong Xu , Agnes P. C. van Hoof , Wei-Hua Lei , Yuan Liu , Hao Zhou , Yong Chen , Shao-Yu Fu , Jun Yang , Xing Liu , Zi-Pei Zhu , Alexei V. Filippenko , Peter G. Jonker , A. S. Pozanenko , He Gao , Xue-Feng Wu , Bing Zhang , Gavin P Lamb , Massimiliano De Pasquale , Shiho Kobayashi , Franz Erik Bauer , Hui Sun , Giovanna Pugliese , Jie An , Valerio D'Elia , Johan P. U. Fynbo , WeiKang Zheng , Alberto J. C. Tirado , Yi-Han Iris Yin , Yuan-Chuan Zou , Adam T. Deller , N. S. Pankov , A. A. Volnova , A. S. Moskvitin , O. I. Spiridonova , D. V. Oparin , V. Rumyantsev , O. A. Burkhonov , Sh. A. Egamberdiyev , V. Kim , M. Krugov , A. M. Tatarnikov , R. Inasaridze , Andrew J. Levan , Daniele Bjørn Malesani , Maria E. Ravasio , Jonathan Quirola-Vásquez , Joyce N. D. van Dalen , Javi Sánchez-Sierras , Daniel Mata Sánchez , Stuart P. Littlefair , Jennifer A. Chacón , Manuel A. P. Torres , Ashley A. Chrimes , Nikhil Sarin , Antonio Martin-Carrillo , Vik Dhillon , Yi Yang , Thomas G. Brink , Rebecca L. Davies , Sheng Yang , Amar Aryan , Ting-Wan Chen , Albert K. H. Kong , Wen-Xiong Li , Rui-Zhi Li , Jirong Mao , Ignacio Pérez-García , Emilio J. Fernández-García , Moira Andrews , Joseph Farah , Zhou Fan , Estefania Padilla Gonzalez , D. Andrew Howell , Dieter Hartmann , Jing-Wei Hu , Páll Jakobsson , Cheng-Kui Li , Zhi-Xing Ling , Curtis McCully , Megan Newsome , Benjamin Schneider , Kaew Samaporn Tinyanont , Ning-Chen Sun , Giacomo Terreran , Qing-Wen Tang , Wen-Xin Wang , Jing-Jing Xu , Wei-Min Yuan , Bin-Bin Zhang , Hai-Sheng Zhao , Juan Zhang

Soft X-ray prompt emission from a high-redshift gamma-ray burst EP240315a

Long gamma-ray bursts (GRBs) are believed to originate from core collapse of massive stars. High-redshift GRBs can probe the star formation and reionization history of the early universe, but their detection remains rare. Here we report the…

High Energy Astrophysical Phenomena · Physics 2024-04-26 Y. Liu , H. Sun , D. Xu , D. S. Svinkin , J. Delaunay , N. R. Tanvir , H. Gao , C. Zhang , Y. Chen , X. -F. Wu , B. Zhang , W. Yuan , J. An , G. Bruni , D. D. Frederiks , G. Ghirlanda , J. -W. Hu , A. Li , C. -K. Li , J. -D. Li , D. B. Malesani , L. Piro , G. Raman , R. Ricci , E. Troja , S. D. Vergani , Q. -Y. Wu , J. Yang , B. -B. Zhang , Z. -P. Zhu , A. de Ugarte Postigo , A. G. Demin , D. Dobie , Z. Fan , S. -Y. Fu , J. P. U. Fynbo , J. -J. Geng , G. Gianfagna , Y. -D. Hu , Y. -F. Huang , S. -Q. Jiang , P. G. Jonker , Y. Julakanti , J. A. Kennea , A. A. Kokomov , E. Kuulkers , W. -H. Lei , J. K. Leung , A. J. Levan , D. -Y. Li , Y. Li , S. P. Littlefair , X. Liu , A. L. Lysenko , Y. -N. Ma , A. Martin-Carrillo , P. O'Brien , T. Parsotan , J. Quirola-Vasquez , A. V. Ridnaia , S. Ronchini , A. Rossi , D. Mata-Sanchez , B. Schneider , R. -F. Shen , A. L. Thakur , A. Tohuvavohu , M. A. P. Torres , A. E. Tsvetkova , M. V. Ulanov , J. -J. Wei , D. Xiao , Y. -H. I. Yin , M. Bai , V. Burwitz , Z. -M. Cai , F. -S. Chen , H. -L. Chen , T. -X. Chen , W. Chen , Y. -F. Chen , Y. -H. Chen , H. -Q. Cheng , C. -Z. Cui , W. -W. Cui , Y. -F. Dai , Z. -G. Dai , J. Eder , D. -W. Fan , C. Feldman , H. Feng , Z. Feng , P. Friedrich , X. Gao , J. Guan , D. -W Han , J. Han , D. -J. Hou , H. -B. Hu , T. Hu , M. -H. Huang , J. Huo , I. Hutchinson , Z. Ji , S. -M. Jia , Z. -Q. Jia , B. -W. Jiang , C. -C. Jin , G. Jin , J. -J. Jin , A. Keereman , H. Lerman , J. -F. Li , L. -H. Li , M. -S. Li , W. Li , Z. -D. Li , T. -Y. Lian , E. -W. Liang , Z. -X. Ling , C. -Z. Liu , H. -Y. Liu , H. -Q. Liu , M. -J. Liu , Y. -R. Liu , F. -J. Lu , H. -J. LU , L. -D. Luo , F. L. Ma , J. Ma , J. -R. Mao , X. Mao , M. McHugh , N. Meidinger , K. Nandra , J. P. Osborne , H. -W. Pan , X. Pan , M. E. Ravasio , A. Rau , N. Rea , U. Rehman , J. Sanders , A. Santovincenzo , L. -M. Song , J. Su , L. -J. Sun , S. -L. Sun , X. -J. Sun , Y. -Y. Tan , Q. -J. Tang , Y. -H. Tao , J. -Z. Tong , H. Wang , J. Wang , L. Wang , W. -X. Wang , X. -F. Wang , X. -Y. Wang , Y. -L. Wang , Y. -S. Wang , D. -M. Wei , R. Willingale , S. -L. Xiong , H. -T. Xu , J. -J. Xu , X. -P. Xu , Y. -F. Xu , Z. Xu , C. -B. Xue , Y. -L. Xue , A. -L. Yan , F. Yang , H. -N. Yang , X. -T. Yang , Y. -J Yang , Y. -W. Yu , J. Zhang , M. Zhang , S. -N. Zhang , W. -D. Zhang , W. -J. Zhang , Y. -H. Zhang , Z. Zhang , Z. Zhang , Z. -L. Zhang , D. -H. Zhao , H. -S. Zhao , X. -F. Zhao , Z. -J. Zhao , L. -X. Zhou , Y. -L. Zhou , Y. -X. Zhu , Z. -C. Zhu , X. -X. Zuo

The X-Ray Transient 080109 in NGC 2770: an X-Ray Flash Associated with a Normal Core-Collapse Supernova

Although it is generally thought that long-duration gamma-ray bursts (LGRBs) are associated with core-collapse supernovae (SNe), so far only four pairs of GRBs and SNe with firmly established connection have been found. All the four GRB-SNe…

Astrophysics · Physics 2008-07-22 Li-Xin Li

Characterising EP241107a: Multiwavelength Observations of an Einstein Probe-detected Fast X-ray Transient

Fast X-ray Transients (FXTs) represent a new class of highly luminous transients in soft X-rays ($\sim$0.3-10 keV) associated with violent astrophysical processes. They manifest as short, singular flashes of X-ray photons with durations…

High Energy Astrophysical Phenomena · Physics 2025-12-17 D. Eappachen , A. Balasubramanian , Vishwajeet Swain , G. C. Anupama , D. K. Sahu , V. Bhalerao , T. Ahumada , I. Andreoni , Sudhanshu Barway , J. Carney , J. Freeburn , M. M. Kasliwal , Tanishk Mohan , A. C. Rodriguez , G. Waratkar

JWST and HST observations of the host galaxy and supernova, SN 2024aihh in EP240801a at z=1.67

We present James Webb Space Telescope (JWST) and Hubble Space Telescope (HST) observations of the counterpart of EP240801a, at z=1.67, the first fast X-ray transient (FXT) identified as an X-ray flash (XRF) by the Einstein Probe (EP) and…

High Energy Astrophysical Phenomena · Physics 2025-12-15 Agnes P. C. van Hoof , Andrew J. Levan , Peter G. Jonker , Morgan Fraser , Luca Izzo , Andrew S. Fruchter , Joyce N. D. van Dalen , Nial R. Tanvir , Jens Hjorth , Antonio Martin-Carrillo , Nikhil Sarin , Laura C. Cotter , Jonathan A. Quirola-Vásquez , Maria E. Ravasio , Javi Sánchez-Sierras , Manuel A. P. Torres , Shuai-Qing Jiang , Dong Xu

XRF 241001A/SN 2024aiiq: A Faint Soft X-ray Transient Detected by SVOM with a Broad-Line Type Ic Supernova Revealed by JWST

X-ray flashes (XRFs) are a type of gamma-ray bursts (GRBs) with prompt emission predominantly below 30 keV poorly detected by previous missions. The advent of the SVOM mission, with its wide-field instrument ECLAIRs, provides a new way to…

High Energy Astrophysical Phenomena · Physics 2026-04-23 B. Schneider , M. Brunet , B. P. Gompertz , D. Turpin , D. B. Malesani , O. Godet , A. J. Levan , F. Daigne , N. Sarin , N. A. Rakotondrainibe , A. Martin-Carrillo , J. T. Palmerio , C. C. Thöne , H. L. Li , A. Saccardi , A. de Ugarte Postigo , S. Antier , V. Buat , D. Ďurovčíková , L. Izzo , J. K. Leung , G. Mo , Y. L. Qiu , S. D. Vergani , J. Wang , J. Y. Wei , L. P. Xin , R. Mochkovitch , B. Zhang , H. B. Cai , S. Campana , A. Coleiro , B. Cordier , P. D'Avanzo , N. Dagoneau , V. D'Elia , Y. W. Dong , D. Götz , S. Guillot , X. H. Han , D. H. Hartmann , L. Huang , Y. F. Huang , P. Jakobsson , A. Klotz , C. Lachaud , X. M. Lu , P. Maggi , M. De Pasquale , F. Piron , R. Salvaterra , S. Schanne , J. Sollerman , N. R. Tanvir , Z. Vidadi , P. Wang , C. Wu , S. L. Xiong , Y. Xu , T. Zafar , P. P. Zhang , S. N. Zhang , S. J. Zheng

EP250108a/SN 2025kg: A Jet-Driven Stellar Explosion Interacting With Circumstellar Material

We present optical, radio, and X-ray observations of EP250108a/SN 2025kg, a broad-line Type Ic supernova (SN Ic-BL) accompanying an Einstein Probe (EP) fast X-ray transient (FXT) at $z=0.176$. EP250108a/SN 2025kg possesses a double-peaked…

High Energy Astrophysical Phenomena · Physics 2025-07-10 Gokul P. Srinivasaragavan , Hamid Hamidani , Genevieve Schroeder , Nikhil Sarin , Anna Y. Q. Ho , Anthony L. Piro , S. Bradley Cenko , Shreya Anand , Jesper Sollerman , Daniel A. Perley , Keiichi Maeda , Brendan O'Connor , Hanindyo Kuncarayakti , M. Coleman Miller , Tomás Ahumada , Jada L. Vail , Paul Duffell , Ranadeep Ghosh Dastidar , Igor Andreoni , Aleksandra Bochenek , Seán J. Brennan , Jonathan Carney , Ping Chen , James Freeburn , Avishay Gal-Yam , Wynn Jacobson-Galán , Mansi M. Kasliwal , Jiaxuan Li , Maggie L. Li , Niharika Sravan , Daniel E. Warshofsky

The Radio Counterpart to the Fast X-ray Transient EP240414a

Despite being operational for only a short time, the Einstein Probe mission, with its large field of view and rapid localisation capabilities, has already significantly advanced the study of rapid variability in the soft X-ray sky. We…

High Energy Astrophysical Phenomena · Physics 2025-10-30 Joe S. Bright , Francesco Carotenuto , Rob Fender , Carmen Choza , Andrew Mummery , Peter G. Jonker , Stephen J. Smartt , David R. DeBoer , Wael Farah , James Matthews , Alexander W. Pollak , Lauren Rhodes , Andrew Siemion

The Einstein Probe transient EP240414a: Linking Fast X-ray Transients, Gamma-ray Bursts and Luminous Fast Blue Optical Transients

Detections of fast X-ray transients (FXTs) have been accrued over the last few decades. However, their origin has remained mysterious. There is now rapid progress thanks to timely discoveries and localisations with the Einstein Probe…

High Energy Astrophysical Phenomena · Physics 2024-10-01 Joyce N. D. van Dalen , Andrew J. Levan , Peter G. Jonker , Daniele B. Malesani , Luca Izzo , Nikhil Sarin , Jonathan Quirola-Vásquez , Daniel Mata Sánchez , Antonio de Ugarte Postigo , Agnes P. C. van Hoof , Manuel A. P. Torres , Steve Schulze , Stuart P. Littlefair , Ashley Chrimes , Maria E. Ravasio , Franz E. Bauer , Antonio Martin-Carrillo , Morgan Fraser , Alexander J. van der Horst , Pall Jakobsson , Paul O'Brien , Massimiliano De Pasquale , Giovanna Pugliese , Jesper Sollerman , Nial R. Tanvir , Tayyaba Zafar , Joseph P. Anderson , Lluís Galbany , Avishay Gal-Yam , Mariusz Gromadzki , Tomas E. Muller-Bravo , Fabio Ragosta , Jacco H. Terwel

Spectral Hardening Reveals Afterglow Emergence in Long-Duration Fast X-ray Transients: A Case Study of GRB 250404A/EP250404a

The prompt emission and afterglow phases of gamma-ray bursts (GRBs) have been extensively studied, yet the transition between these two phases remains inadequately characterized due to limited multiwavelength observational coverage. Among…

High Energy Astrophysical Phenomena · Physics 2025-08-21 Yi-Han Iris Yin , Yuan Fang , Bin-Bin Zhang , Chen Deng , Jun Yang , Run-Chao Chen , Yuan Liu , Yehao Cheng , Dong Xu , Xiaofeng Wang , Rongfeng Shen , Rui-Zhi Li , Jirong Mao , Wen-Xiong Li , Alberto Javier Castro-Tirado , Weihua Lei , Shao-Yu Fu , Yuan-Pei Yang , Shuai-Qing Jiang , Jie An , Chun Chen , Zhong-Nan Dong , Guowang Du , Ali Esamdin , Zhou Fan , Haicheng Feng , Lu Feng , Emilio Fernández-García , Xing Gao , Maria Gritsevich , Wei-Jian Guo , Jingwei Hu , You-Dong Hu , Yanlong Hua , Abdusamatjan Iskandar , Junjie Jin , Niu Li , Xia Li , Ziwei Li , Jia-Qi Lin , Dezi Liu , Jinzhong Liu , Qichun Liu , Xiaowei Liu , Xing Liu , Daniele B. Malesani , Ignacio Pérez-García , Hui Sun , Xue-Feng Wu , Yun-Ao Xiao , Ding-Rong Xiong , Shengyu Yan , Beibei Zhang , Jinghua Zhang , Haichang Zhu , Zipei Zhu , Hu Zou , Weimin Yuan , Bing Zhang

The curious case of EP241021a: Unraveling the mystery of its exceptional rebrightening

Fast X-ray Transients (FXTs) are a rare and poorly understood phenomenon with a variety of possible progenitors. The launch of the Einstein Probe (EP) mission has facilitated a rapid increase in the real-time discovery and follow-up of…

High Energy Astrophysical Phenomena · Physics 2025-09-17 Malte Busmann , Brendan O'Connor , Julian Sommer , Daniel Gruen , Paz Beniamini , Ramandeep Gill , Michael J. Moss , Antonella Palmese , Arno Riffeser , Yu-Han Yang , Eleonora Troja , Simone Dichiara , Roberto Ricci , Noel Klingler , Claus Gössl , Lei Hu , Arne Rau , Christoph Ries , Geoffrey Ryan , Michael Schmidt , Muskan Yadav , Gregory R. Zeimann

The Soft X-ray Aspect of Gamma-ray Bursts in the Einstein Probe Era

The Einstein Probe (EP) satellite, dedicated at time-domain high-energy astrophysics and multi-messenger astronomy, was recently launched and successfully put into operation. The wide-field X-ray telescope (WXT, 0.5-4 keV) onboard has…

High Energy Astrophysical Phenomena · Physics 2025-04-22 Hao-Xuan Gao , Jin-Jun Geng , Yi-Fang Liang , Hui Sun , Fan Xu , Xue-Feng Wu , Yong-Feng Huang , Zi-Gao Dai , Wei-Min Yuan

Long-term radio monitoring of the fast X-ray transient EP240315a: evidence for a relativistic jet

The recent launch of Einstein Probe (EP) in early 2024 opened up a new window onto the transient X-ray sky, allowing for real-time discovery and follow-up of fast X-ray transients (FXRTs). Multi-wavelength observations of FXRTs and their…

High Energy Astrophysical Phenomena · Physics 2024-07-29 R. Ricci , E. Troja , Y. Yang , M. Yadav , Y. Liu , H. Sun , X. Wu , H. Gao , B. Zhang , W. Yuan

The Radio Properties of Type Ibc Supernovae

Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all these events result from the death of massive…

Astrophysics · Physics 2008-11-26 Alicia M. Soderberg

An optical supernova associated with the X-ray flash XRF 060218

Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supernovae were not hitherto known to be associated with GRBs,…

Astrophysics · Physics 2008-11-26 E. Pian , P. A. Mazzali , N. Masetti , P. Ferrero , S. Klose , E. Palazzi , E. Ramirez-Ruiz , S. E. Woosley , C. Kouveliotou , J. Deng , A. V. Filippenko , R. Foley , J. Fynbo , D. A. Kann , W. Li , J. Hjorth , K. Nomoto , F. Patat , D. Sauer , J. Sollerman , P. M. Vreeswijk , E. W. Guenther , A. Levan , P. O'Brien , N. Tanvir , R. A. M. J. Wijers , C. Dumas , O. Hainaut , D. S. Wong , D. Baade , L. Wang , L. Amati , E. Cappellaro , A. J. Castro-Tirado , S. Ellison , F. Frontera , A. S. Fruchter , J. Greiner , K. Kawabata , C. Ledoux , K. Maeda , P. Moller , L. Nicastro , E. Rol , R. Starling

Characterization of a peculiar Einstein Probe transient EP240408a: an exotic gamma-ray burst or an abnormal jetted tidal disruption event?

We present the results of our multi-wavelength (X-ray to radio) follow-up campaign of the Einstein Probe transient EP240408a. The initial 10 s trigger displayed bright soft X-ray (0.5-4 keV) radiation with peak luminosity $L_\textrm{X}…

High Energy Astrophysical Phenomena · Physics 2025-01-14 B. O'Connor , D. Pasham , I. Andreoni , J. Hare , P. Beniamini , E. Troja , R. Ricci , D. Dobie , J. Chakraborty , M. Ng , N. Klingler , V. Karambelkar , S. Rose , S. Schulze , G. Ryan , S. Dichiara , I. Monageng , D. Buckley , L. Hu , G. Srinivasaragavan , G. Bruni , T. Cabrera , S. B. Cenko , H. van Eerten , J. Freeburn , E. Hammerstein , M. Kasliwal , C. Kouveliotou , K. Kunnumkai , J. K. Leung , A. Lien , A. Palmese , T. Sakamoto