M F Cawley

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  • S D Biller, A C Breslin, J Buckley, M Catanese, M Carson, D A Carter-Lewis +5 others
  • 1999
We have used data from the TeV γ-ray flare associated with the active galaxy Markarian 421 observed on 15 May 1996 to place bounds on the possible energy-dependence of the speed of light in the context of an effective quantum gravitational energy scale. The possibility of an observable time dispersion in high energy radiation has recently received attention(More)
If supernova remnants (SNRs) are the site of cosmic-ray acceleration, the associated nuclear interactions should result in an observable flux of γ-rays for the nearest SNRs. Measurements of the TeV γ-ray flux from six nearby, radio-bright SNRs have been made with the Whipple Observatory imaging aiř Cerenkov telescope over the period September 1993 to June(More)
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 ∼ > 350 GeV) γ-ray observations taken with the Whipple Observatory γ-ray telescope, data from the Oriented Scintillation Spectrometer Experiment (OSSE) of the(More)
  • P J Boyle, J H Buckley, A M Burdett, J Bussóns Gordo, D A Carter-Lewis, M Catanese +22 others
  • 1997
Based on BACODINE network notification the Whipple Observatory gamma-ray telescope has been used to search for the delayed TeV counterpart to BATSE-detected gamma-ray bursts. In the fast slew mode, any point in the sky can be reached within two minutes of the burst notification. The search strategy, necessary because of the uncertainty in burst position and(More)
We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple ObservatoryÏs 10-m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hr between 1994 November and 1997 March. During this period the Whipple 10 m telescope was operated at its lowest energy threshold to date. Spectral(More)
This self-directed learning module highlights new advances in this topic area. It is part of the chapter on spinal cord injury rehabilitation in the Self-Directed Physiatric Education Program for practitioners and trainees in physical medicine and rehabilitation. This section explores the medical, psychologic, and social challenges facing an individual with(More)
Mkn 421 was observed for about two days with BeppoSAX, prior to and partly overlapping the start of a 1 week continuous exposure with ASCA in April 1998, as part of a worldwide multiwavelength campaign. A pronounced, well defined, flare observed in X-rays was also observed simultaneously at TeV energies by the Whipple Observatory's 10 m gamma-ray telescope.(More)
  • M Catanese, P J Boyle, J H Buckley, A M Burdett, J Bussóns Gordo, D A Carter-Lewis +19 others
  • 1997
Two active galactic nuclei have been detected at TeV energies using the atmospherič Cerenkov imaging technique. The Whipple Observatory γ-ray telescope has been used to observe all the BL Lacertae objects in the northern hemisphere out to a redshift of 0.1. We report the tentative detection of VHE emission from a third BL Lac object, 1ES 2344+514. Progress(More)
The Crab Nebula has become established as the standard candle for TeV gamma-ray astronomy using the atmospheric Cherenkov technique. No evidence for variability has been seen. The spectrum of gamma rays from the Crab Nebula has been measured in the energy range 500 GeV to 8 TeV at the Whipple Observatory by the atmospheric Cherenkov imaging technique. Two(More)
  • V Cormaughton, C W Akerlof, S Biller, P Boyle, J Buckley, D A Carter-Lewis +19 others
  • 1997
Although atmospheric Cherenkov telescopes have restricted fields of view, their fluence sensitivity warrants a search for gamma-ray burst phenomena. A search for 400 GeV gamma-ray bursts on a 1 s timescale using archival data taken between 1988 and 1992 with the Whipple Collaboration 10 m reflector is presented. No evidence of such bursts is found. Bursts(More)