The 2025 outburst of IGR J17511-3057: timing and spectral insights from NICER and NuSTAR
A. Sanna·A C Albayati·Gaurava K. Jaisawal·T. Di Salvo·Alessandro Papitto·L. Burderi·D. Altamirano·Joel B. Coley·Mason Ng·Christian Malacaria·Tod E. Strohmayer·A. Anitra·Giulia Illiano·Tuğba Boztepe·Deepto Chakrabarty·A. Riggio
Context: IGR J17511−3057 is an accreting millisecond X-ray pulsar and a known type-I burster. The source was observed in outburst for the first time in 2009 and again in 2015, followed by a decade-long quiescence phase. Aims. The source was observed in a new outburst phase starting in February 2025 and lasting at least nine days. We investigated the spectral and temporal properties of IGR J17511−3057, aiming to characterize its current status and highlight possible long-term evolution of its pro