«A Microquasar Odyssey: Unveiling the Complexities»

X-ray spectral and timing evolution during the 2023-2024 outburst of GX 339-4

15 Sept 2025, 13:08

2m

Palazzo Municipale - Sala delle Capriate (Cefalù (Palermo))

Flash-talk Flash-talk Broadband Spectroscopy (modelling and observation)

Speaker

Mr Federico Ferretti (Università degli Studi Roma Tre)

Description

GX 339–4 is a low-mass X-ray binary often used as an archetype, showing typical source behaviors. The source undergoes a full outburst every 2-3 years, passing through all known accretion
states. The 2023-2024 outburst was monitored as part of a multiwavelength campaign, which
included X-ray observations by IXPE and NICER. We
used NICER data to analyze the spectral-timing properties of GX 339-4 and compare them
to those of previous outbursts. This spectral-timing information is used to characterize the
evolution of the source during the outburst and to search for time-lags in the X-ray light curves.
We will present the preliminary results of this analysis.