1.7k citations · 7.8k across the 88 of their papers we have counts for
7 papers · 1 filter
Investigating ULX accretion flows and cyclotron resonance in NGC 300 ULX1
Filippos Koliopanos, Georgios Vasilopoulos, Johannes Buchner +2
Methods. We analyzed broadband XMM-Newton and NuSTAR observations of NGC 300 ULX1, performing phase-averaged and phase-resolved spectroscopy. We compared two physically motivated m…
X-UDS: The Chandra Legacy Survey of the UKIDSS Ultra Deep Survey Field
Dale D. Kocevski, Guenther Hasinger, Murray Brightman +25
We present the X-UDS survey, a set of wide and deep Chandra observations of the Subaru-XMM Deep/UKIDSS Ultra Deep Survey (SXDS/UDS) field. The survey consists of 25 observations th…
Dramatic X-ray spectral variability of a Compton-thick type-1 QSO at
Torben Simm, Johannes Buchner, Andrea Merloni +6
We report on the discovery of a dramatic X-ray spectral variability event observed in a broad line type-1 QSO. The XMM-Newton spectrum from the year 2000 is characterized…
XZ: Deriving redshifts from X-ray spectra of obscured AGN
Charlotte Simmonds, Johannes Buchner, Mara Salvato +2
Context: Redshifts are fundamental for our understanding of extragalactic X-ray sources. Ambiguous counterpart associations, expensive optical spectroscopy and/or multimission mult…
Quantifying the Bayesian Evidence for a Planet in Radial Velocity Data
Benjamin E. Nelson, Eric B. Ford, Johannes Buchner +5
We present results from a data challenge posed to the radial velocity (RV) community: namely, to quantify the Bayesian "evidence" for n={0,1,2,3} planets in a set of synthetically…
Low frequency view of GW 170817/GRB 170817A with the Giant Meterwave Radio Telescope
L. Resmi, S. Schulze, C. H. Ishwara Chandra +8
The short gamma-ray burst (GRB) 170817A was the first GRB associated with a gravitational-wave event. Due to the exceptionally low luminosity of the prompt -ray and the afterglo…