Disc-Jet coupling in the LMXB 4U1636-53 from INTEGRAL

Abstract

We report on the spectral analysis results of the neutron star, atoll type, low mass X-ray Binary 4U1636-53 observed by INTEGRAL and BeppoSAX satellites. Spectral behavior in three different epochs corresponding to three different spectral states has been deeply investigated. Two data set spectra show a continuum well described by one or two soft blackbody plus a Comptonized components with changes in the Comptonizing electrons and black body temperature and the accretion rates, which are typical of the spectral transitions from high to low state. In one occasion INTEGRAL spectrum shows, for first time in this source, a hard tail dominating the emission above 30 keV. The total spectrum is fitted as the sum of a Comptonized component similar to soft state and a power-law component (Gamma=2.76), indicating the presence of a non thermal electron distribution of velocities. In this case, a comparison with hard tails detected in soft states from neutron stars systems and some black hole binaries suggests that a similar mechanism could originate these components in both cases.

6 pages, 4 figures, 2 tables. accepted ApJ

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Cited by in corpus (22)

• Relativistic Iron Line Emission from the Neutron Star Low-mass X-ray Binary 4U 1636-536
• BeppoSAX observation of 4U 1705-44: detection of hard X-ray emission in the soft state
• Broad-band Spectral Evolution of Scorpius X-1 along its Color-Color Diagram
• X-ray variability patterns and radio/X-ray correlations in Cyg X-1
• A very rare triple-peaked type-I X-ray burst in the low-mass X-ray binary 4U 1636-53
• Spectral and Timing Properties of Atoll Source 4U 1705-44 : LAXPC/AstroSat Results
• INTEGRAL: science highlights and future prospects
• Wobbling and precessing jets from warped disks in binary systems
• New insights on the puzzling LMXB 1RXS J180408.9-342058: the intermediate state, the clocked type-I X-ray bursts and much more
• The Galactic LMXB Population and the Galactic Centre Region
• Super-Orbital Variability in Hard X-rays
• Spectral states evolution of 4U 1728-34 observed by INTEGRAL and RXTE: non-thermal component detection
• Burst-Disk Interaction in 4U 1636-536 as observed by NICER
• Iron-line and continuum variations in the XMM-Newton and Suzaku spectra of the neutron-star low-mass X-ray binary 4U 1636-53
• On the disc reflection spectroscopy of NS LMXB Serpens~X-1: analysis of a recent NuSTAR observation
• The imprint of carbon combustion on a superburst from the accreting neutron star 4U 1636-536
• Phase lags of quasi-periodic oscillations across source states in the low-mass X-ray binary 4U 1636-53
• The study of multi-peaked type-I X-ray bursts in the neutron-star low mass X-ray binary 4U 1636$-$536 with RXTE
• Correlated Optical/X-ray Long-term Variability in LMXB 4U1636-536
• Hard X-ray Tail Discovered in the Clocked Burster GS 1826-238
• The hard X-ray emission along the "Z" track in GX 17+2
• Insight-HXMT Detections of Hard X-ray Tails in Scorpius X-1