Browsing Externally hosted open access publications with University of Galway authors (1) by Subject "galaxies : active"
Now showing items 1-5 of 5
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A multiwavelength view of the tev blazar markarian 421: correlated variability, flaring, and spectral evolution
(IOP Publishing, 2005-09-01)We report results from an intensive multiwavelength monitoring campaign on the TeV blazar Mrk 421 over the period of 2003 - 2004. The source was observed simultaneously at TeV energies with the Whipple 10 m telescope and ... -
A search for tev gamma‐ray emission from high‐peaked flat‐spectrum radio quasars using the whipple air cerenkov telescope
(IOP Publishing, 2004-10-01)Blazars have traditionally been separated into two broad categories based on their optical emission characteristics. Blazars with faint or no emission lines are referred to as BL Lacertae objects ( BL Lacs), and blazars ... -
Measurement of the multi‐tev gamma‐ray flare spectra of markarian 421 and markarian 501
(IOP Publishing, 1999-01-20)The energy spectrum of Markarian 421 in flaring states has been measured from 0.3 to 10 TeV using both small and large zenith angle observations with the Whipple Observatory 10 m imaging telescope. The large zenith angle ... -
Observation of m87 at 400 gev with the whipple 10 meter telescope
(IOP Publishing, 2004-07-20)We present results from observations taken with the Whipple 10 m very high energy gamma-ray telescope with maximal sensitivity at 400 GeV during 39 hr between 2000 and 2003 in the direction of the giant radio galaxy M87. ... -
Simultaneous x-ray and t[clc]e[/clc]v observations of a rapid flare from markarian 421
(IOP Publishing, 1999-12-01)Mrk 421 was observed for about 2 days with BeppoSAX in 1998 April as part of a worldwide multiwavelength campaign. A large, well-defined flare was observed in X-rays. The same flare was observed simultaneously at TeV ...