89 citations · 153 across the 16 of their papers we have counts for
6 papers · 1 filter
GRB 060607A: A GRB with Bright Asynchronous Early -ray and Optical Emissions
Houri Ziaeepour, Stephen T. Holland, Patricia T. Boyd +8
The early optical emission of the moderately high redshift () GRB 060607A shows a remarkable broad and strong peak with a rapid rise and a relatively slow power-law decay.…
The XMM-Newton Serendipitous Survey V. Optical identification of the XMM-Newton Medium sensitivity Survey (XMS)
X. Barcons, F. J. Carrera, M. T. Ceballos +53
We present the XMM-Newton Medium sensitivity Survey (XMS), including a total of 318 X-ray sources found among the serendipitous content of 25 XMM-Newton target fields. The XMS comp…
Distinguishing between Dark Energy Models
Houri Ziaeepour
Recent data and new data analysis methods show that most probably the parameter in the equation of state of the dark energy is smaller than -1 at low redshifts. We briefly revi…
The XMM-SSC survey of hard-spectrum XMM-Newton sources 1: optically bright sources
M. J. Page, I. Lehmann, Th. Boller +15
We present optical and X-ray data for a sample of serendipitous XMM-Newton sources that are selected to have 0.5-2 keV vs 2-4.5 keV X-ray hardness ratios which are harder than the…
Nonparametric determination of redshift evolution index of Dark Energy
Houri Ziaeepour
We propose a nonparametric method to determine the sign of γ- the redshift evolution index of dark energy. This is important for distinguishing between positive energy models, a co…
GRB 050822: Detailed analysis of an XRF observed by Swift
O. Godet, K. L. Page, J. Osborne +10
We report on the temporal and spectral characteristics of the early X-ray emission from the GRB 050822 as observed by Swift. This burst is likely to be an XRF showing major X-ray f…