Ignacio Pérez-García

Minutes-long soft X-ray prompt emission from a compact object merger

An Li, Chen-Wei Wang, Niccolò Passaleva, Jie An et autres

cn, it, hk, au, fr, mx, es, Égypte, gb, ru, fi, us, ge, nl, in, th, uz (code pays fourni par la source)

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

Gokul P. Srinivasaragavan, Dongyue Li, Xander J. Hall, Ore Gottlieb et autres

Abstract 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 ∼10 45 erg s …

us, cn, cl, rs, nl, it, gb, se, tw, de, th, es, dk, fi, jp, in, sk (code pays fourni par la source)

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

Gokul P. Srinivasaragavan, Dongyue Li, Xander J. Hall, Ore Gottlieb et autres

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 similar to 10(45) erg s(-1), …

us, cn, gb, nl, tw, de, es, fi, jp (code pays fourni par la source)

An extremely bright slow-rising afterglow from an off-axis jet in GRB 260310A

Yu-Han Yang, Roberto Ricci, Eleonora Troja, Muskan Yadav et autres

We present a multi-wavelength study of GRB 260310A, a nearby long-duration gamma-ray burst at $z\simeq0.153$ associated with a broad-lined Type Ic supernova. Despite its modest prompt gamma-ray output, $E_{γ,\rm iso}\simeq3.5\times10^{50}$ erg, GRB 260310A exhibits one of the brightest afterglows ever observed in …

An extremely bright slow-rising afterglow from an off-axis jet in GRB 260310A

Yu-Han Yang, Roberto Ricci, Eleonora Troja, Muskan Yadav et autres

We present a multi-wavelength study of GRB 260310A, a nearby long-duration gamma-ray burst at $z\simeq0.153$ associated with a broad-lined Type Ic supernova. Despite its modest prompt gamma-ray output, $E_{γ,\rm iso}\simeq3.5\times10^{50}$ erg, GRB 260310A exhibits one of the brightest afterglows ever observed in …

it, cn, hk, es, us, gb, de, ua, cz, fi (code pays fourni par la source)

Extremely Luminous Optical Afterglow of an Energetic Gamma-Ray Burst GRB 230204B

Rahul Gupta, Judith L. Racusin, Vladimir Lipunov, Y. -D. Hu et autres

Abstract Robotic telescope networks play an important role in capturing early and bright optical afterglows, providing critical insights into the energetics and emission mechanisms of GRBs. In this study, we analyze GRB 230204B, an exceptionally energetic and multipulsed long GRB, detected by …

Minutes-long soft X-ray prompt emission from a compact object merger

An Y. Li, Chen-Wei Wang, Niccolò Passaleva, Jie An et autres

Compact object mergers are multi-messenger sources and known progenitors of some gamma-ray bursts, bright flashes of high-energy radiation powered by a central engine, either an accreting black hole or a neutron star. Our understanding of these events has so far been shaped …

Minutes-long soft X-ray prompt emission from a compact object merger

An Y. Li, Chen-Wei Wang, Niccolò Passaleva, Jie An et autres

Compact object mergers are multi-messenger sources and known progenitors of some gamma-ray bursts, bright flashes of high-energy radiation powered by a central engine, either an accreting black hole or a neutron star. Our understanding of these events has so far been shaped …

cn, it, au, hk, fr, mx, es, Égypte, gb, ru, fi, us, ge, nl, kr (code pays fourni par la source)

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

Yi-Han Iris Yin, Yuan Fang, Bin‐Bin Zhang, Chen Deng et autres

Abstract 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 the recent growing samples of fast X-ray transients observed by …

cn, us, hk, es, ru, fi, au, dk, nl (code pays fourni par la source)

Deciphering the Physical Origin of GRB 240825A: A Long GRB Lacking a Bright Supernova

Rahul Gupta, Judith L. Racusin, R. Sanchez-Ramirez, Yi Hu et autres

We present a comprehensive multiwavelength analysis of GRB 240825A, a bright gamma-ray burst (GRB) detected by Fermi and Swift, with a prompt duration ($T_{\rm 90}$ $\sim$ 4 sec in 50-300 keV in GBM) near the boundary separating short and long GRBs, prompting …

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

Shuai-Qing Jiang, Dong Xu, Agnes P. C. van Hoof, Wei‐Hua Lei et autres

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

fr (code pays fourni par la source)

Early Optical Follow-Up Observations of Einstein Probe X-Ray Transients During the First Year

S. S. Wu, Ignacio Pérez-García, Alberto Javier Castro-Tirado, Y. D. Hu et autres

We present early follow-up observations of Einstein Probe (EP) X-ray transients, following its first year of operation. EP is a dedicated wide-field X-ray observatory that is transforming our understanding of the dynamic X-ray universe. During its first year, EP successfully detected a …

es, cn, ru, se, fi, ua, mx (code pays fourni par la source)