376 citations · 9.9k across the 229 of their papers we have counts for
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Reclassification of the nearest quasar pair candidate: SDSS J15244+3032 - RXS J15244+3032
E. P. Farina, R. Falomo, A. Treves +3
We present optical spectroscopy of the nearest quasar pair listed in the 13th edition of the Veron-Cetty & Veron catalogue, i.e. the two quasars SDSS J15244+3032 and RXS J15244+303…
On the radio and NIR jet of PKS 2155-304 and its close environment
E. Liuzzo, R. Falomo, A. Treves +13
PKS 2155-304 is one of the brightest BL Lac object in the sky and a very well studied target from radio to TeV bands. We report on high-resolution (~ 0.12 arcsec) direct imaging of…
On the cool gaseous haloes of quasars
E. P. Farina, R. Falomo, R. Decarli +2
We present optical spectroscopy of projected QSO pairs to investigate the MgII and the CIV absorption features imprinted on the spectrum of the background object by the gaseous hal…
On the redshift of the bright BL Lac object PKS 0048-097
Marco Landoni, Renato Falomo, Aldo Treves +4
Aims: The determination of elusive redshifts of bright BL Lac objects Methods: We use the capabilities of newly available spectrograph X-Shooter at European Southern Observatory (E…
The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
The H. E. S. S. Collaboration, :, A. Abramowski +442
Abridged: The giant radio galaxy M 87 with its proximity, famous jet, and very massive black hole provides a unique opportunity to investigate the origin of very high energy (VHE;…
The low-mass end of the Mbh/Mhost relation in quasars
Roberto Decarli, Renato Falomo, Jari K. Kotilainen +3
The Mbh-Mhost relation in quasars has been probed only in a limited parameter space, namely at Mbh~10^9 Msun and Mhost~10^12 Msun. Here we present a study of 26 quasars lying in th…
MAGIC observations of the giant radio galaxy M87 in a low emission state between 2005 and 2007
Karsten Berger, Dijana Dominis Prester, Fabrizio Tavecchio +1
We present the results of a long M87 monitoring campaign in very high energy -rays with the MAGIC-I Cherenkov telescope. A total of 150 hours of data was gathered between 2005 a…
PG 1553+113: five years of observations with MAGIC
MAGIC Collaboration, J. Aleksić, E. A. Alvarez +156
We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs, E > 100 GeV). Power law fits of the individual…
The jet of the BL Lacertae object PKS 2201+044: MAD near-IR adaptive optics observations and comparison with optical, radio and X-ray data
E. Liuzzo, R. Falomo, A. Treves +14
Relativistic jets are a common feature of radio loud active galactic nuclei. Multifrequency observations are a unique tool to constrain their physics. We report on a detailed study…
Geometry and inclination of the broad line region in blazars
Roberto Decarli, Massimo Dotti, Aldo Treves
We study the properties of the broad line region in blazars by comparing the virial estimate of black hole masses with that derived from the mass of the host galaxies. The former i…
A quasar companion to the puzzling quasar SDSS J0927+2943
R. Decarli, R. Falomo, A. Treves +1
We report the discovery of a quasar close to SDSS J0927+2943 (z = 0.713), which is a massive binary / recoiling black hole candidate. The companion quasar is at a projected distanc…
The quasar M_bh - M_host relation through Cosmic Time II - Evidence for evolution from z=3 to the present age
R. Decarli, R. Falomo, A. Treves +3
We study the dependence of the M_bh - M_host relation on the redshift up to z=3 for a sample of 96 quasars the host galaxy luminosities of which are known. Black hole masses were e…
The quasar M_bh - M_host relation through Cosmic Time I - Dataset and black hole masses
R. Decarli, R. Falomo, A. Treves +3
We study the M_bh - M_host relation as a function of Cosmic Time in a sample of 96 quasars from z=3 to the present epoch. In this paper we describe the sample, the data sources and…
The properties of quasar hosts at the peak of the quasar activity
J. K. Kotilainen, R. Falomo, R. Decarli +3
We present near-infrared imaging obtained with ESO VLT/ISAAC of a sample of 16 low luminosity radio-quiet quasars at the epoch around the peak of the quasar activity (2 < z < 3), a…
The jet of the BL Lac object PKS 0521 -365 in the near-IR : MAD adaptive optics observations
R. Falomo, E. Pian, A. Treves +12
BL Lac objects are low--power active nuclei exhibiting a variety of peculiar properties that are caused by the presence of a relativistic jet and orientation effects. We present he…
A new apparent quasar pair: Q2225-403A,B
R. Decarli, A. Treves, R. Falomo
We report the serendipitous discovery of a previously unknown quasar at 10.5" from Q2225-403 (z=2.410). The observation of the broad emission line of MgII_2798 and of the surroundi…
Primordial black holes are again on the limelight
Marco Roncadelli, Aldo Treves, Roberto Turolla
We derive a strong upper bound on the amount of Primordial Black Holes (PBHs) that can still be present in the Universe. Gravitational capture of PBHs by the Milky Way stars during…