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Tev gamma-ray observations of the galactic center
(IOP Publishing, 2004-05-18)
We report a possible detection of TeV gamma rays from the Galactic center by the Whipple 10 m gamma-ray telescope. Twenty-six hours of data were taken over an extended period from 1995 through 2003 resulting in a total ...
Discovery of spectral variability of markarian 421 at t[clc]e[/clc]v energies
(IOP Publishing, 2002-08-10)
The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10 m gamma-ray telescope taken in 2000/2001 revealed exceptionally strong and ...
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 ...
Limits to quantum gravity effects on energy dependence of the speed of light from observations of tev flares in active galaxies
(American Physical Society (APS), 1999-09-13)
We have used data from a TeV gamma-ray flare associated with the active galaxy Markarian 421 to place bounds on the possible energy dependence of the speed of light in the context of an effective quantum gravitational ...
A very high energy gamma‐ray spectrum of 1es 2344+514
(IOP Publishing, 2005-12-01)
The BL Lacertae (BL Lac) object 1ES 2344+514 (1ES 2344), at a redshift of 0.044, was discovered as a source of very high energy (VHE) gamma rays by the Whipple collaboration in 1995 (Catanese et al.). This detection was ...
Very high‐energy observations of psr b1951+32
(IOP Publishing, 1997-11-01)
PSR B1951 + 32 is a gamma-ray pulsar detected by the Energetic Gamma Ray Experiment Telescope (EGRET) and identified with the 39.5 ms radio pulsar in the supernova remnant CTB 80. The pulsar energy spectrum is consistent ...
Multiwavelength observations of the blazar markarian 421 in 2002 december and 2003 january
(IOP Publishing, 2006-04-20)
We report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection of X-ray and TeV gamma-ray ...
Multiwavelength observations of a flare from markarian 501
(IOP Publishing, 1997-10-01)
We present multiwavelength observations of the BL Lacertae object Markarian 501 (Mrk 501) in 1997 between April 8 and April 19. Evidence of correlated variability is seen in very high energy (VHE; E greater than or similar ...
Cutoff in the t[clc]e[/clc]v energy spectrum of markarian 421 during strong flares in 2001
(IOP Publishing, 2001-10-10)
Exceptionally strong and long- lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal- to- noise ratio of the data, we derive the energy spectrum between 260 ...
Veritas observations of the bl lac object txs 0506+056
(American Astronomical Society, 2018-07-12)
On 2017 September 22, the IceCube Neutrino Observatory reported the detection of the high-energy neutrino event IC 170922A, of potential astrophysical origin. It was soon determined that the neutrino direction was consistent ...