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Multiwavelength observations of mrk 501 in 2008
(EDP Sciences, 2014-12-17)
Context. Blazars are variable sources on various timescales over a broad energy range spanning from radio to very high energy (>100 GeV, hereafter VHE). Mrk 501 is one of the brightest blazars at TeV energies and ...
A search for pulsations from geminga above 100 gev with veritas
(IOP Publishing, 2015-02-09)
We present the results of 71.6 hr of observations of the Geminga pulsar (PSR J0633+1746) with the VERITAS very-high-energy gamma-ray telescope array. Data taken with VERITAS between 2007 November and 2013 February were ...
Deep optical observations of the -ray pulsar psr j0007+7303 in the cta 1 supernova remnant
(Oxford University Press (OUP), 2013-01-29)
The Fermi Large Area Telescope discovered the time signature of a radio-silent pulsar coincident with RX J0007.0+7302, a plerion-like X-ray source at the centre of the CTA 1 supernova remnant. The inferred timing parameters ...
Firstnustarobservations of mrk 501 within a radio to tev multi-instrument campaign
(IOP Publishing, 2015-10-09)
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 2013 April 1 and August 10, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. ...
Dark spot, spiral waves and the sw sextantis behaviour: it is all about ux ursae majoris
(Oxford University Press (OUP), 2010-10-12)
We present an analysis of time-resolved, medium-resolution optical spectroscopic observations of UX Ursae Majoris (UX UMa) in the blue (3920-5250 A) and red (6100-7200 A) wavelength ranges that were obtained in 1999 April ...
The most powerful flaring activity from the nlsy1 pmn j0948+0022
(Oxford University Press (OUP), 2014-11-27)
We report on multifrequency observations performed during 2012 December-2013 August of the first narrow-line Seyfert 1 galaxy detected in gamma-rays, PMN J0948+0022 (z = 0.5846). A y -ray flare was observed by the Large ...
Phase connecting multi-epoch radio data for the ultracool dwarf tvlm 513-46546
(EDP Sciences, 2010-11-19)
Context. Radio data obtained for the ultracool dwarf TVLM 513-46546 has indicated a rotation period of approximate to 1.96 h via regular radio pulses, but how stable is this period. This has major implications regarding ...
Multiwavelength observations of markarian 421 in 2005-2006
(IOP Publishing, 2009-03-31)
Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 ...
Bf eridani: a cataclysmic variable with a massive white dwarf and an evolved secondary
(Oxford University Press (OUP), 2008-05-01)
We present high- and medium-resolution spectroscopic observations of the cataclysmic variable BF Eridani (BF Eri) during its low and bright states. The orbital period of this system was found to be 0.270881(3) d. The ...