375 citations · 1.9k across the 51 of their papers we have counts for
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Correlated spectral and temporal changes in 3C 390.3: a new link between AGN and Galactic Black Hole Binaries?
M. Gliozzi, I. E. Papadakis, C. Raeth
This work presents the results from a systematic search for evidence of temporal changes (i.e., non-stationarity) associated with spectral variations in 3C 390.3, using data from a…
Deep optical observations of the supernova remnants G 126.2+1.6, G 59.8+1.2 and G 54.4-0.3
P. Boumis, F. Mavromatakis, E. M. Xilouris +3
Optical CCD imaging and spectroscopic observations of three supernova remnants are presented. Optical emission from G 54.4-0.3 and G 59.8+1.2 is detected for the first time, while…
16 micron Imaging around the Hubble Deep Field North with the Spitzer IRS
H. I. Teplitz, V. Charmandaris, R. Chary +4
We present a pilot study of 16 micron imaging within the GOODS northern field. Observations were obtained using the PeakUp imaging capability of the Spitzer IRS. We survey 35 squar…
The creation of the Helix planetary nebula (NGC 7293) by multiple events
J. Meaburn, P. Boumis, J. A. Lopez +4
A deep, continuum-subtracted, image of NGC 7293 has been obtained in the light of the Halpha+[N II] emission lines. New images of two filamentary halo stuctures have been obtained…
Further evidence for the presence of a neutron star in 4U 2206+54. INTEGRAL and VLA observations
P. Blay, M. Ribo, I. Negueruela +5
The majority of High Mass X-ray Binaries (HMXBs) behave as X-ray pulsars, revealing that they contain a magnetised neutron star. Among the four HMXBs not showing pulsations, and th…
The relationship between X-ray variability amplitude and black hole mass in active galactic nuclei
Paul M. O'Neill, Kirpal Nandra, Iossif E. Papadakis +1
We have investigated the relationship between the 2-10 keV X-ray variability amplitude and black hole mass for a sample of 46 radio-quiet active galactic nuclei observed by ASCA. T…