253 citations · 1.3k across the 31 of their papers we have counts for
13 papers · 1 filter
A strong optical flare before the rising afterglow of GRB 080129
J. Greiner, T. Krühler, S. McBreen +11
We report on GROND observations of a 40 sec duration (rest-frame) optical flare from GRB 080129 at redshift 4.349. The rise- and decay time follow a power law with indices +12 and…
Three X-ray transients in M31 observed with Swift
R. Voss, W. Pietsch, F. Haberl +5
The purpose of this study is to find transient X-ray sources in M31, and to investigate and classify their nature. Three X-ray transients were observed with Swift. For each of the…
Looking for black-holes in X-ray binaries with XMM-Newton: XTE J1817-330 and XTE J1856+053
Gloria Sala, Jochen Greiner, Natalia Primak
The X-ray binary XTE J1817-330 was discovered in outburst on 26 January 2006 with RXTE/ASM. One year later, another X-ray transient discovered in 1996, XTE J1856+053, was detected…
V5116 Sgr, an Eclipsing Supersoft Post-Outburst Nova?
Gloria Sala, Margarita Hernanz, Carlo Ferri +1
V5116 Sgr (Nova Sgr 2005 No. 2), discovered on 2005 July 4, was observed with XMM-Newton in March 2007, 20 months after the optical outburst. The X-ray spectrum shows that the nova…
XMM-Newton observations of XTE J1817-330 and XTE J1856+053
Gloria Sala, Jochen Greiner, Eugenio Bottacini +1
The black hole candidate XTE J1817-330 was discovered in outburst on 26 January 2006 with RXTE/ASM. One year later, on 28 February 2007, another X-ray transient discovered in 1996,…
XMM-Newton and INTEGRAL observations of the black hole candidate XTE J1817-330
Gloria Sala, Jochen Greiner, Marco Ajello +2
The galactic black hole candidate XTE J1817-330 was discovered in outburst by RXTE in January 2006. We present here the results of an XMM-Newton Target of opportunity observation (…
XMM-Newton observations of Nova Sgr 1998
M. Hernanz, G. Sala
We report on X-ray observations of Nova Sagittarius 1998 (V4633 Sgr), performed with XMM-Newton at three different epochs, 934, 1083 and 1265 days after discovery. The nova was det…
GRO J1655-40: from ASCA and XMM-Newton Observations
Xiao-Ling Zhang, Shuang Nan Zhang, Gloria Sala +3
We have analysed four ASCA observations (1994--1995, 1996--1997) and three XMM-Newton observations (2005) of this source, in all of which the source is in high/soft state. We model…
XMM-Newton observations of the microquasars GRO J1655-40 and GRS 1915+105
Gloria Sala, Jochen Greiner, Frank Haberl +4
We present results of a sequence of XMM-Newton observations of the two microquasars GRO J1655-40 and GRS 1915+105. The observations were preformed using the EPIC-pn camera in the B…
Models for the soft X-ray emission of post-outburst classical novae
Gloria Sala, Margarita Hernanz
A hydrostatic and stationary white dwarf envelope model has been developed for the study of the post-outburst phases of classical novae and their soft X-ray emission. Several white…
Envelope models for the supersoft X-ray emission of V1974 Cyg
Gloria Sala, Margarita Hernanz
The evolution of the soft X-ray emission of V1974 Cyg has been simulated by a white dwarf envelope model with steady hydrogen burning. The comparison of the results obtained from R…
XMM-Newton Observations of Recent Galactic Novae
Margarita Hernanz, Gloria Sala
We report on the observations of five recent galactic classical novae, performed with XMM-Newton. Some of them show emission in the whole range from 0.2 to 8.0 keV, up to 3 years a…
The Turn-off of Classical Novae Observed Through X-rays: Models versus ROSAT Observations of V1974 Cyg
Gloria Sala, Margarita Hernanz
Detection of X-ray emission from classical novae in their post-outburst stages provides crucial information about the nova phenomenon. The soft X-ray emission gives a direct insigh…