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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 ...
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 ...
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 ...
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 ...
Search for high‐energy gamma rays from an x‐ray–selected blazar sample
(IOP Publishing, 2003-12-20)
Our understanding of blazars has been greatly increased in recent years by extensive multiwavelength observations, particularly in the radio, X-ray, and gamma-ray regions. Over the past decade the Whipple 10 m telescope ...
Detection of the bl lacertae object h1426+428 at tev gamma‐ray energies
(IOP Publishing, 2002-06-01)
A very high energy gamma-ray signal has been detected at the 5.5sigma level from H1426+ 428, an X-ray-selected BL Lacertae object at a redshift of 0.129. The object was monitored from 1995 to 1998 with the Whipple 10 m ...
The tev spectrum of h1426+428
(IOP Publishing, 2002-11-20)
The BL Lac object H1426+428 was recently detected as a high-energy gamma-ray source by the VERITAS collaboration (Horan et al.). We have reanalyzed the 2001 portion of the data used in the detection in order to examine the ...
Constraints on the very high energy emission from bl lacertae objects
(IOP Publishing, 2004-03-01)
We present results from observations of 29 BL Lacertae objects, taken with the Whipple Observatory 10 m gamma-ray telescope between 1995 and 2000. The observed objects are mostly at low redshift (z<0.2), but observations ...