The complex time behaviour of the microquasar GRS 1915+105 in the ρ-class observed with BeppoSAX. III: The hard X-ray delay and limit cycle mapping

Abstract

The microquasar GRS1915+105 was observed by BeppoSAX in October 2000 for about ten days while the source was in ρ-mode, which is characterized by a quasi-regular type I bursting activity. This paper presents a systematic analysis of the delay of the hard and soft X-ray emission at the burst peaks. The lag, also apparent from the comparison of the [1.7-3.4] keV light curves with those in the [6.8-10.2] keV range, is evaluated and studied as a function of time, spectral parameters, and flux. We apply the limit cycle mapping technique, using as independent variables the count rate and the mean photon rate. The results using this technique were also cross-checked using a more standard approach with the cross-correlation methods. Data are organized in runs, each relative to a continuous observation interval. The detected hard-soft delay changes in the course of the pointing from about 3 s to about 10 s and presents a clear correlation with the baseline count rate.

accepted for publication in A&A

References in corpus (4)

• The faint "heartbeats" of IGR J17091-3624: an exceptional black-hole candidate
• Radiation Pressure and Mass Ejection in Rho-like States of GRS 1915+105
• Joint spectral-timing modelling of the hard lags in GX 339-4: constraints on reflection models
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Cited by in corpus (4)

• Non-linear oscillator models for the X-ray bursting of the microquasar GRS 1915+105
• New insight into the Rapid Burster by Insight-HXMT
• Time properties of the the rho-class burst of the microquasar GRS 1915+105 observed with BeppoSAX in April 1999
• Lyapunov functions for a non-linear model of the X-ray bursting of the microquasar GRS 1915+105