A parsec scale X-ray extended structure from the X-ray binary Circinus X-1 (2008)
Soleri, P., Heinz, S., Fender, R., Wijnands, R., Tudose, V., Altamirano, D., ...
We present the results of the analysis of two Chandra observations of Circinus X-1 performed in 2007, for a total exposure time of ~50 ks. The source was observed with the High Resolution Camera...
Abada-Simon, M., Casares, J., Evans, A., Eyres, S., Fender, R., Garrington, S., ...
We have used ISO to observe the Magnetic Cataclysmic Variable AE Aquarii in the previously unexplored range from 4.8 $\mu$m up to 170 $\mu$m in the framework of a coordinated multi-wavelength...
Abada-Simon, M., Casares, J., Evans, A., Eyres, S., Fender, R., Garrington, S., ...
We have used ISO to observe the Magnetic Cataclysmic Variable AE Aquarii in the previously unexplored range from 4.8 $\mu$m up to 170 $\mu$m in the framework of a coordinated multi-wavelength...
Abada-Simon, M., Casares, J., Evans, A., Eyres, S., Fender, R., Garrington, S., ...
We have used ISO to observe the Magnetic Cataclysmic Variable AE Aquarii in the previously unexplored range from 4.8 $\mu$m up to 170 $\mu$m in the framework of a coordinated multi-wavelength...
Measuring the accretion rate and kinetic luminosity functions of supermassive black holes (2007)
Koerding, E. G., Jester, S., Fender, R.
We derive accretion rate functions (ARFs) and kinetic luminosity functions (KLF) for jet-launching supermassive black holes. The accretion rate as well as the kinetic power of an active galaxy is...
Gallo, E., Migliari, S., Markoff, S., Tomsick, J., Bailyn, C., Berta, S., ...
(Abridged) Among the various issues that remain open in the field of accretion onto black hole X-ray binaries (BHBs) is the way the gas accretes at very low Eddington ratios, in the so-called...
The variability plane of accreting compact objects (2007)
Koerding, E. G., Migliari, S., Fender, R., Belloni, T., Knigge, C., McHardy, I.
Recently, it has been shown that soft-state black hole X-ray binaries and active galactic nuclei populate a plane in the space defined by the black hole mass, accretion rate and characteristic...
Measuring the accretion rate and kinetic luminosity functions of supermassive black holes (2007)
Körding, E. G., Jester, S., Fender, R.
We derive accretion rate functions (ARFs) and kinetic luminosity functions (KLFs) for jet-launching supermassive black holes. The accretion rate as well as the kinetic power of an active galaxy is...
A very brief description of LOFAR - the Low Frequency Array (2006)
Falcke, H., Van Haarlem, M. P., De Bruyn, A. G., Braun, R., Röttgering, H. J. A., Stappers, B., ...
LOFAR (Low Frequency Array) is an innovative radio telescope optimized for the frequency range 30-240 MHz. The telescope is realized as a phased aperture array without any moving parts. Digital beam...
LOFAR - Opening up a new window on the Universe (2006)
Rottgering, H. J. A., Braun, R., Barthel, P. D., Van Haarlem, M. P., Miley, G. K., Morganti, R., ...
LOFAR, the Low Frequency Array, is a next-generation radio telescope that is being built in Northern Europe and expected to be fully operational at the end of this decade. It will operate at...
Gallo, E., Fender, R., Miller-Jones, J., Merloni, A., Jonker, P., Heinz, S., ...
Deep observations with the Very Large Array of A0620-00, performed in 2005 August, resulted in the first detection of radio emission from a black hole binary at X-ray luminosities as low as 10^{-8.5}...
Wijnands, R., Rupen, M., Maccarone, T., Homan, J., Cornelisse, R., ...
We present the first results of our X-ray monitoring campaign on a 1.7 square degree region centered on Sgr A* using the satellites XMM-Newton and Chandra. The purpose of this campaign is to monitor...
A dark jet dominates the power output of the stellar black hole Cygnus X-1 (2005)
Gallo, E., Fender, R., Kaiser, C., Russell, D., Morganti, R., Oosterloo, T., ...
Accreting black holes are thought to emit the bulk of their power in the X-ray band by releasing the gravitational potential energy of the infalling matter. At the same time, they are capable of...
On the Soft Excess in the X-ray Spectrum of Cir X-1: Revisitation of the Distance to Cir X-1 (2004)
Iaria, R., Spano', M., Di Salvo, T., Robba, N. R., Burderi, L., Fender, R., ...
We report on a 300 ks BeppoSAX (0.12-200 keV) observation of Circinus X-1 (Cir X-1) at phases between 0.62 and 0.84 and on a 90 ks BeppoSAX observation of Cir X--1 at phases 0.11-0.16. Using the...
Using SKA to observe relativistic jets from X-ray binary systems (2004)
I briefly outline our current observational understanding of the relativistic jets observed from X-ray binary systems, and how their study may shed light on analogous phenomena in Active Galactic...
An ultra-relativistic outflow from a neutron star accreting gas from a companion (2004)
Fender, R., Wu, K., Johnston, H., Tzioumis, T., Jonker, P., Spencer, R., ...
Collimated relativistic outflows—also known as jets—are amongst the most energetic phenomena in the Universe. They are associated with supermassive black holes in distant active galactic nuclei,...
An ultra-relativistic outflow from a neutron star accreting gas from a companion (2004)
Fender, R., Wu, K., Johnston, H., Tzioumis, T., Jonker, P., Klis, M. Van Der
Collimated relativistic outflows-also known as jets-are amongst the most energetic phenomena in the Universe. They are associated with supermassive black holes in distant active galactic nuclei,...
Simultaneous radio and X-ray observations of the low-mass X-ray binary GX 13+1 (2004)
Homan, J., Wijnands, R., Rupen, M.P., Fender, R., Hjellming, R.M., Klis, M. Van Der, ...
We present the results of two simultaneous X-ray/radio observations of the low-mass X-ray binary GX 13+1, performed in July/ August 1999 with the Rossi X-ray Timing Explorer and the Very Large Array....
Exploring the role of jets in X-ray binaries and low-luminosity AGN (2004)
Markoff, S., Nowak, M., Falcke, H., Maccarone, T., Fender, R.
The Connection Between Radio Quiet AGN and the High/Soft State of X-Ray Binaries (2003)
Maccarone, T. J., Gallo, E., Fender, R.
A large sample of AGN studied here shows a ``quenching'' of the radio emission occurs when the luminosity is at a few percent to about 10% of the Eddington rate, just as is seen in the high/soft...
Modeling the X-ray Contribution of X-ray Binary Jets (2003)
Markoff, S., Nowak, M., Corbel, S., Fender, R., Falcke, H.
Astrophysical jets exist in both XRBs and AGN, and seem to share common features, particularly in the radio. While AGN jets are known to emit X-rays, the situation for XRB jets is not so clear. Radio...
Exploring the role of jets in the radio/X-ray correlations of GX 339-4 (2003)
Markoff, S., Nowak, M., Corbel, S., Fender, R., Falcke, H.
The Galactic black hole candidate X-ray binary GX 339-4 spends most of its time in the low/hard state, making it an ideal candidate for modeling the assumedly low accretion phase. The radio emission...
Exploring the Role of Jets in the Radio/X-ray Correlations of GX339-4 (2002)
Markoff, S., Nowak, M., Corbel, S., Fender, R., Falcke, H.
The Galactic black hole candidate X-ray binary GX339-4 spends most of its time in the low/hard state, making it an ideal candidate for modeling the assumedly low accretion phase. The radio emission...
Assessing the X-ray Contribution from Jets in X-ray Binaries (2002)
S. Marko, M. Nowak, S. Corbel, R. Fender, H. Falcke
Astrophysical jets exist from the stellar scale up to AGN, and seem to share common features particularly in the radio. But while AGN jets are known to emit X-rays, the situation for XRB jets is not...
Chandra imaging spectroscopy of 1E 1740.7 - 2942 (2002)
We have observed the black hole candidate 1E 1740.7 - 2942, the brightest persistent hard X-ray source within a few degrees of the Galactic centre, for 10 ksec with Chandra (ACIS-I) on August 2000....
Assessing the X-ray Contribution from Jets in X-ray Binaries (2002)
Markoff, S., Nowak, M., Corbel, S., Fender, R., Falcke, H.
Astrophysical jets exist from the stellar scale up to AGN, and seem to share common features particularly in the radio. But while AGN jets are known to emit X-rays, the situation for XRB jets is not...
Do High Frequency QPOs Depend on Phase of Low Frequency QPOs in XTE J1550-564 ? (2002)
We have studied the dependence of the high frequency Quasi-periodic Oscillation (QPO) (~284 Hz) on the phase of the low frequency QPO (~6 Hz) in the black hole X-ray binary XTE J1550-564 in the...
On the correlation between radio and X-ray flux in Low/Hard state Black Holes (2002)
Gallo, E., Fender, R., Pooley, G.
Radio emission from X-ray binary systems (XRBs) has developed in recent years from being peculiar phenomenon to being recognised as an ubiquitous property of several classes of XRBs. In this scenario...
The power of jets : new clues from radio circular polarization and X-rays (2002)
Falcke, H., Beckert, T., Markoff, S., Körding, E., Bower, G. C., Fender, R.
VLT optical observations of V821 Ara(=GX339-4) in an extended "off" state (2001)
Shahbaz, T., Fender, R., Charles, P. A.
We report on low-resolution spectroscopy of GX339-4 during its current, extended X-ray `off' state in May 2000 (r=20.1) obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS1)....
Observations have revealed strong evidence for powerful jets in the Low/Hard states of black hole candidate X-ray binaries. Correlations between the radio and IR, and radio and X-ray bands suggest...
d in Falcke & Marko (2000), Marko, Falcke & Fender (2000), respectively, and references therein. We include a representative gure, which includes only synchrotron emission from the jet. Surprisingly,...
Simultaneous radio and X-ray observations of Galactic Centre low mass X-ray binaries (2000)
Berendsen, S. G. H., Fender, R., Kuulkers, E., Heise, J.
We have performed simultaneous X-ray and radio observations of thirteen Galactic centre low-mass X-ray binaries in 1998 April using the Wide-Field Cameras onboard BeppoSAX and the Australia Telescope...
Identification of a Likely Radio Counterpart of the Rapid Burster (1999)
Moore, C. B., Rutledge, R. E., Fox, D. W., Guerriero, R. A., Lewin, W. H. G., Fender, R., ...
We have identified a likely radio counterpart to the low-mass X-ray binary MXB 1730-335 (the Rapid Burster). The counterpart has shown 8.4 GHz radio on/off behavior correlated with the X-ray on/off...