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11 papers
Searching for the most powerful thermonuclear X-ray bursts with the Neil Gehrels Swift Observatory
J. J. M. in 't Zand, M. J. W. Kries, D. M. Palmer +1
We searched for thermonuclear X-ray bursts from Galactic neutron stars in all event mode data of the Neil Gehrels Swift Observatory collected until March 31, 2018. In particular, w…
The Large Observatory for X-ray Timing (LOFT)
M. Feroci, the LOFT Consortium
High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultra-dense matter and to black hole masses an…
The Orbit of the Eclipsing X-ray Pulsar EXO 1722-363
Thomas W. J. Thompson, John A. Tomsick, J. J. M. in 't Zand +2
With recent and archival Rossi X-Ray Timing Explorer (RXTE) X-ray measurements of the heavily obscured X-ray pulsar EXO 1722-363 (IGR J17252-3616), we carried out a pulse timing an…
X-ray Transients from X-ray Binaries to Gamma Ray Bursts
John Heise, Jean in 't Zand
We discuss three classes of x-ray transients to highlight three new types of transients found with the Wide Field Cameras onboard BeppoSAX. First there are the transients related t…
Observations of Eddington-limited type-I X-ray bursts from 4U 1812-12
M. Cocchi, A. Bazzano, L. Natalucci +5
During more than 3 years (August 1996-October 1999) monitoring of a 40x40 degree sky region around the Galactic Centre by the Wide Field Cameras on board BeppoSAX, a total of 8 typ…
Discovery of the peculiar supernova 1998bw in the error box of GRB980425
T. J. Galama, P. M. Vreeswijk, J. van Paradijs +42
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from G…
BeppoSAX follow-up search for the X-ray afterglow of GRB970111
M. Feroci, L. A. Antonelli, M. Guainazzi +17
The BeppoSAX satellite has recently opened a new way towards the solution of the long standing gamma-ray bursts' (GRBs) enigma, providing accurate coordinates few hours after the e…
Detection of X-ray bursts in the globular cluster NGC 6652
J. J. M. in 't Zand, F. Verbunt, J. Heise +5
Two type I X-ray bursts were detected from a position consistent with the transient X-ray source in NGC 6652 with the Wide Field Camera of the BeppoSAX satellite, strongly suggesti…
Spectral Properties of the Prompt X-ray emission and Afterglow from the Gamma-Ray Burst of 28 February 1997
F. Frontera, E. Costa, L. Piro +18
We report high-energy spectral data of the prompt emission of GRB970228 and its X-ray afterglow. We establish that the nature of the X-ray afterglow emission is non-thermal and sim…
The Optical Transient of GRB970228, 16 hours after the burst
F. Pedichini, A. Di Paola, L. Stella +13
Until recently the positions of gamma ray bursts were not sufficiently well known within a short timescale to localize and identify them with known celestial sources. Following the…
Radio and Optical Follow-up Observations and Improved IPN Position of GRB 970111
T. J. Galama, P. J. Groot, R. G. Strom +12
We report on Westerbork 840 MHz, 1.4 and 5 GHz radio observations of the improved IPN-WFC error box of the gamma-ray burst GRB 970111, between 26.4 hours and 120 days after the eve…