Hae
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Far-infrared photometry of OJ 287 with the Herschel Space Observatory
<p>Context: The blazar OJ 287 has shown a approximate to 12 year quasi-periodicity over more than a century, in addition to the common properties of violent variability in all frequency ranges. It is the strongest known ...
A kilonova as the electromagnetic counterpart to a gravitational-wave source
Gravitational waves were discovered with the detection of binary black-hole mergers(1) and they should also be detectable from lower-mass neutron-star mergers. These are predicted to eject material rich in heavy radioactive ...
Search for AGN counterparts of unidentified Fermi-LAT sources with optical polarimetry Demonstration of the technique
Context. The third Fermi-LAT catalog (3FGL) presented the data of the first four years of observations from the Fermi Gamma-ray Space Telescope mission. There are 3034 sources, 1010 of which still remain unidentified. ...
MAGIC upper limits on the GRB 090102 afterglow
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Indications of a GeV component in the emission from gamma-ray bursts (GRBs) are known since the Energetic Gamma-Ray Experiment Telescope observations during the 1990s and they have been confirmed by the data of the ...
Low-redshift quasars in the SDSS Stripe 82-II. Associated companion galaxies and signature of star formation
We present optical spectroscopy of the close companions of 22 low-redshift (z < 0.5) quasars (QSO) selected from a larger sample of QSO in the SDSS Stripe82 region for which both the host galaxy and the large-scale ...
Core-collapse supernova progenitor constraints using the spatial distributions of massive stars in local galaxies
<p>We study the spatial correlations between the H$alpha$ emission and different types of massive stars in two local galaxies, the Large Magellanic Cloud (LMC) and Messier 33. We compare these to correlations derived for ...
XMM-Newton observations of 1A 0535+262 in quiescence
Accretion onto magnetized neutron stars is expected to be centrifugally inhibited at low accretion rates. Several sources including 1A 0535+262, however, are known to pulsate in quiescence at luminosities below the theoretical ...
Ringo2 Optical Polarimetry of Blazars
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