146 citations · 2k across the 56 of their papers we have counts for
40 papers · 1 filter
Disk reflection signatures in the spectrum of the bright Z-source GX 340+0
A. D'Ai, R. Iaria, T. Di Salvo +2
We present the preliminary results of a 50 ks long XMM-Newton observation of the bright Z-source GX 340+0. In this Letter we focus on the study of a broad asymmetric emission line…
Spectral analysis of LMC X-2 with XMM/Newton: unveiling the emission process in the extragalactic Z-source
G. Lavagetto, R. Iaria, A. D'Ai' +2
We present the results of the analysis of an archival observation of LMC X-2 performed with XMM/Newton. The spectra taken by high-precision instruments have never been analyzed bef…
A complex environment around Cir X-1
A. D'Ai, R. Iaria, T. Di Salvo +2
We present the results of an archival 54 ks long Chandra observation of the peculiar source Cir X--1 during the phase passage 0.223-0.261. A comparative analysis of X-ray spectra,…
Broad-band Spectral Evolution of Scorpius X-1 along its Color-Color Diagram
A. D'Aí, P. Zycki, T. Di Salvo +3
We analyze a large collection of RXTE archive data from April 1997 to August 2003 of the bright X-ray source Scorpius X-1 in order to study the broadband spectral evolution of the…
Chandra Observation of the Big Dipper X 1624-490
R. Iaria, G. Lavagetto, A. D'Ai' +2
We present the results of a 73 ks long Chandra observation of the dipping source X 1624-490. During the observation a complex dip lasting 4 hours is observed. We analyse the persis…
Chandra Observation of the Dipping Source XB 1254-690
R. Iaria, T. Di Salvo, G. Lavagetto +2
We present the results of a 53 ks long Chandra observation of the dipping source XB 1254--690. During the observation neither bursts or dips were observed. From the zero-order imag…
Constraints to the EOS of ultradense matter with model-independent astrophysical observations
G. Lavagetto, I. Bombaci, A. D'Ai' +2
The recent discovery of burst oscillations at 1122 Hz in the x-ray transient XTE J1739-285, together with the measurement of the mass of the binary millisecond pulsar PSR J0751+180…
Timing an Accreting Millisecond Pulsar: Measuring the Accretion Torque in IGR J00291+5934
L. Burderi, T. Di Salvo, G. Lavagetto +7
We performed a timing analysis of the fastest accreting millisecond pulsar IGR J00291+5934 using RXTE data taken during the outburst of December 2004. We corrected the arrival time…
A Hard X-ray View on Scorpius X-1 with INTEGRAL: non-Thermal Emission ?
T. Di Salvo, P. Goldoni, L. Stella +12
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the…
Chandra Observation of the Persistent Emission from the Dipping Source XB 1916-053
R. Iaria, T. Di Salvo, G. Lavagetto +2
We present the results of a 50 ks long Chandra observation of the dipping source XB 1916-053. During the observation two X-ray bursts occurred and the dips were not present at each…
The Iron K-shell features of MXB 1728-34 from a Simultaneous Chandra-RXTE Observation
A. D' Ai, T. Di Salvo, R. Iaria +7
We report on a simultaneous Chandra and RossiXTE observation of the low-mass X-ray binary atoll bursting source MXB 1728-34 performed on 2002 March 3-5. We fit the 1.2-35 keV conti…
Resolving the Fe xxv Triplet with Chandra in Cen X-3
R. Iaria, T. Di Salvo, N. R. Robba +3
We present the results of a 45 ks Chandra observation of the high-mass X-ray binary Cen X--3 at orbital phases between 0.13 and 0.40 (in the eclipse post-egress phases). Here we co…
The broad-band spectrum of Cyg X-2 with INTEGRAL
G. Lavagetto, T. Di Salvo, M. Falanga +7
We study the broad band (3-100 keV) spectrum of Cygnus X-2 with INTEGRAL. We find that the spectrum is well fitted by a Comptonized component with a seed-photons temperature of ~1…
Timing an Accreting Millisecond Pulsar: Measuring the Accretion Torque in IGR J00291+5934
L. Burderi, T. Di Salvo, A. Riggio +6
We present here a timing analysis of the fastest accreting millisecond pulsar IGR J00291+5934 using RXTE data taken during the outburst of December 2004. We corrected the arrival t…
Revised orbital parameters of the accreting millisecond pulsar SAX J1808.4-3658
A. Papitto, M. T. Menna, L. Burderi +3
We present temporal analysis of the three outbursts of the X-ray millisecond pulsar SAX J1808.4-3658 that occurred in 1998, 2000 and 2002. With a technique that uses the chi^2 obta…
A broad iron line in the Chandra/HETG spectrum of 4U 1705-44
T. Di Salvo, R. Iaria, M. Mendez +5
We present the results of a Chandra 30 ks observation of the low mass X-ray binary and atoll source 4U 1705-44. Here we concentrate on the study of discrete features in the energy…
High-Energy pulse profile of the Transient X-ray Pulsar SAX J2103.5+4545
M. Falanga, T. Di Salvo, L. Burderi +6
In two recent INTEGRAL papers, Lutovinov et al. (2003) and Blay et al. (2004) report a timing and spectral analysis of the transient Be/X-ray pulsar SAX J2103.5+4545 at high energi…
The role of General Relativity in the evolution of Low Mass X-ray Binaries
Giuseppe Lavagetto, Luciano Burderi, Francesca D'Antona +3
We study the evolution of Low Mass X-ray Binaries (LMXBs) and of millisecond binary radio pulsars (MSPs), with numerical simulations that keep into account the evolution of the com…
High Resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation
A. D'Ai', T. Di Salvo, R. Iaria +5
We report on a simultaneous Chandra and RossiXTE observation of the LMXB atoll bursting source 4U 1728-34 performed on 2002 March 3-5. We fitted the 1.2-35 keV continuum spectrum w…
On the Soft Excess in the X-ray Spectrum of Cir X-1: Revisitation of the Distance to Cir X-1
R. Iaria, M. Spano', T. Di Salvo +5
We report on a 300 ks BeppoSAX (0.12-200 keV) observation of Circinus X-1 (Cir X-1) at phases between 0.62 and 0.84 and on a 90 ks BeppoSAX observation of Cir X--1 at phases 0.11-0…
To accrete or not to accrete: the dilemma of the recycling scenario
L. Burderi, F. D'Antona, T. Di Salvo +3
We study the evolution of a low-mass X-ray binary by coupling a binary stellar evolution code with a general relativistic code that describes the behaviour of the neutron star. We…
The Different Fates of a Low-Mass X-ray Binary. I: Conservative Mass Transfer
G. Lavagetto, L. Burderi, F. D'Antona +3
We study the evolution of a low mass x-ray binary coupling a binary stellar evolution code with a general relativistic code that describes the behavior of the neutron star. We assu…
BeppoSAX serendipitous discovery of the X-ray pulsar SAX J1802.7-2017
G. Augello, R. Iaria, N. R. Robba +4
We report on the serendipitous discovery of a new X-ray source, SAX J1802.7-2017, ~22' away from the bright X-ray source GX 9+1, during a BeppoSAX observation of the latter source…
Disappearance of Hard X-ray Emission in the Last BeppoSAX Observation of the Z Source GX 349+2
R. Iaria, T. Di Salvo, N. R. Robba +4
We report on the results from two BeppoSAX observations of the Z source GX 349+2 performed in February 2001 and covering the broad energy range 0.12-200 keV. The light curve obtain…