395 citations · 3.6k across the 86 of their papers we have counts for
54 papers · 1 filter
First superburst from a classical low-mass X-ray binary transient
L. Keek, J. J. M. in 't Zand, E. Kuulkers +3
We report the analysis of the first superburst from a transiently accreting neutron star system with the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer. The superburst oc…
Constraining the neutron star equation of state using XMM-Newton
P. G. Jonker, J. Kaastra, M. Mendez +1
We have identified three possible ways in which future XMM-Newton observations can provide significant constraints on the equation of state of neutron stars. First, using a long ob…
Detection of a 1258 Hz high-amplitude kilohertz quasi-periodic oscillation in the ultra-compact X-ray binary 1A 1246-588
P. G. Jonker, J. J. M. in 't Zand, M. Mendez +1
We have observed the ultra-compact low-mass X-ray binary (LMXB) 1A 1246-588 with the Rossi X-ray Timing Explorer (RXTE). In this manuscript we report the discovery of a kilohertz q…
Six new candidate ultracompact X-ray binaries
J. J. M. in 't Zand, P. G. Jonker, C. B. Markwardt
Ultracompact X-ray binaries (UCXBs) appear able to sustain accretion onto the compact accretor at rates lower than in wider X-ray binaries. This may be understood by the smaller ac…
Discovery of X-ray burst triplets in EXO 0748-676
L. Boirin, L. Keek, M. Mendez +5
[Abridged] Type-I X-ray bursts are thermonuclear flashes that take place on the surface of accreting neutron stars. The wait time between consecutive bursts is set by the time requ…
Evidence for 1122 Hz X-Ray Burst Oscillations from the Neutron-Star X-Ray Transient XTE J1739-285
P. Kaaret, Z. Prieskorn, J. J. M. in 't Zand +6
We report on millisecond variability from the X-ray transient XTE J1739-285. We detected six X-ray type I bursts and found evidence for oscillations at 1122 +/- 0.3 Hz in the brigh…
The superburst recurrence time in luminous persistent LMXBs
L. Keek, J. J. M. in 't Zand, A. Cumming
Theory and observations favor stable helium burning as the most important means to produce fuel for superbursts on neutron star surfaces. However, all known superbursters exhibit u…
INTEGRAL survey of the Cassiopeia region in hard X rays
P. R. den Hartog, W. Hermsen, L. Kuiper +3
We report on the results of a deep 1.6 Ms INTEGRAL observation of the Cassiopeia region performed from December 2003 to February 2004. Eleven sources were detected with the imager…
Two new candidate ultra-compact X-ray binaries
C. G. Bassa, P. G. Jonker, J. J. M. in 't Zand +1
We present the identification of the optical counterparts to the low-mass X-ray binaries 1A 1246-588 and 4U 1812-12. We determine the X-ray position of 1A 1246-588 from ROSAT/PSPC…
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL
Jerome Chenevez, Maurizio Falanga, Soeren Brandt +6
INTEGRAL detected on August 31, 2004, an unusual thermonuclear X-ray burst from the low-mass X-ray binary GX 3+1. Its duration was 30 min, which is between the normal burst duratio…
Long Type I X-ray Bursts and Neutron Star Interior Physics
Andrew Cumming, Jared Macbeth, J. J. M. in 't Zand +1
Superbursts are very energetic Type I X-ray bursts discovered in recent years by long term monitoring of X-ray bursters, believed to be due to unstable ignition of carbon in the de…
Chandra observation of the fast X-ray transient IGR J17544-2619: evidence for a neutron star?
J. J. M. in 't Zand
IGR J17544-2619 belongs to a distinct group of at least seven fast X-ray transients that cannot readily be associated with nearby flare stars or pre-main sequence stars and most pr…
On the possibility of a helium white dwarf donor in the presumed ultracompact binary 2S 0918-549
J. J. M. in 't Zand, A. Cumming, M. V. van der Sluys +2
2S 0918-549 is a low-mass X-ray binary (LMXB) with a low optical to X-ray flux ratio. Probably it is an ultracompact binary with an orbital period shorter than 60 min. Such binarie…
The GRB of 1999 January 23: prompt emission and broad-band afterglow modeling
A. Corsi, L. Piro, E. Kuulkers +13
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright gamma-ray burst (GRB) 990123. We present the broad-band spectrum of the prompt emission, including op…
The puzzling case of GRB 990123: multiwavelength afterglow study
E. Maiorano, N. Masetti, E. Palazzi +18
We report on the BeppoSAX data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123, one of the brightest GRBs detected by BeppoSAX. Mainly due to its exceptional brightness,…
The puzzling case of GRB 990123: prompt emission and broad-band afterglow modeling
A. Corsi, L. Piro, E. Kuulkers +13
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright GRB 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and gamm…
Probing the environment in Gamma-ray bursts: the case of an X-ray precursor, afterglow late onset and wind vs constant density profile in GRB011121 and GRB011211
L. Piro, M. De Pasquale, P. Soffitta +9
In this paper we present BeppoSax and XMM observations of two long Gamma-ray bursts, the X-ray rich event of December 11, 2001 (GRB011211) and the hard and very bright event of Nov…
The prompt X-ray emission of GRB011211: possible evidence of a transient absorption feature
F. Frontera, L. Amati, J. J. M. in 't Zand +10
We report on observation results of the prompt X- and gamma-ray emission from GRB011211. This event was detected with the Gamma-Ray Burst Monitor and one of the Wide Field Cameras…
Spectral states and transient behaviour of a sample of X-ray bursters observed by BeppoSax
L. Natalucci, A. Bazzano, F. Capitanio +3
During observation campaigns of the Galactic Bulge region, BeppoSAX detected a total of 21 new X-ray bursters in about 6 years of operation. These sources are mostly transient and…
Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27
L. Amati, F. Frontera, J. J. M. in 't Zand +15
We report on the X-ray observations of the X-ray flash (XRF) which occurred on 2002 April 27, three days before BeppoSAX was switched off. The event was detected with the BeppoSAX…
New BeppoSAX-WFC results on superbursts
J. J. M. in 't Zand, R. Cornelisse, E. Kuulkers +2
Presently seven superbursters have been identified representing 10% of the total Galactic X-ray burster population. Four superbursters were discovered with the Wide Field Cameras (…
A BeppoSAX-WFC viewpoint of new INTEGRAL sources, particularly IGR J17544-2619
Jean in 't Zand, John Heise, Pietro Ubertini +2
Of the 21 new sources that INTEGRAL discovered up to Feb. 1, 2004, five were detected with the BeppoSAX Wide Field Cameras at earlier times. IGR J16320-4751 appears to be a persist…
Superbursts at near-Eddington mass accretion rates
J. J. M. in 't Zand, R. Cornelisse, A. Cumming
Models for superbursts from neutron stars involving carbon shell flashes predict that the mass accretion rate should be anywhere in excess of one tenth of the Eddington limit. Yet,…
Multiwavelength study of the very long GRB 020410
L. Nicastro, J. J. M. in 't Zand, L. Amati +13
GRB 020410 is by far the longest gamma-ray burst (with a duration of about 1600 s) to have been followed up from the X-ray through the radio regime. Afterglow emission was detected…