Now showing items 1-20 of 115

  • Whitecaps and the marine atmosphere, report no. 3 

    Spillane, M. C.; O'Muircheartalgh, I.G.; Monahan, E.C. (1981-04)
    This report covers the period from 1 July, 1980 to 31 March, 1981, and is devoted to a description of the work carried out, and the results obtained, during this interval on the on-going ONR-sponsored study of "The Influence ...
  • Whitecaps and the marine atmosphere, report no. 5 

    Monahan, E. C. (1983-06)
    During this year we have continued making measurements of aerosols and electrostatic charge from our coastal tower in Gort na gCapall on Inishmore. Likewise, the experiments centred on the Whitecap Simulation Tank are ...
  • Whitecaps and the marine atmosphere, report no. 6 

    Doyle, David M. (1984-06)
    This study is concerned with the interdependence of 10m elevation wind speed, oceanic whitecap coverage and marine aerosol concentration. The field work is divided into two distinct phases. On Inishmore Co. Galway. ...
  • Whitecaps and the marine atmosphere, report no. 7 

    Monahan, E. C. (1984-10)
    This report describes the general activities and findings of the Whitecap Project in the 16-month-long period 1 June 1983-30 September 1984. Additional results obtained during this period from this study of whitecaps ...
  • Whitecaps and the marine atmosphere, report no. 8 

    Monahan, E. C. (1985-10)
    During the 12-month-long period covered by this report, i.e. in the 1 October 1984 - 30 September interval, all facets of the Whitecap Project progressed apace. The field work during this year included both international and ...
  • A Search for Pulsed TeV Gamma Ray Emission from the Crab Pulsar 

    Lang, Mark; Gillanders, Gary (1999)
    We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 ...
  • Search for Pulsed TeV Gamma-ray Emission from the Crab Pulsar 

    Lang, Mark; Gillanders, Gary (1999)
    We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10 m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 ...
  • A Search for Pulsed TeV Gamma Ray Emission from the Crab Pulsar 

    Lang, Mark; Gillanders, Gary; Burdett, A. M.; Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Buckley, J. H.; Carter-Lewis, D. A.; Catanese, M.; Cawley, M. F.; D'Vali, M.; Fegan, D. J.; Fegan, S. J.; Finley, J. P.; Gaidos, J. A.; Gillanders, G. H.; Hall, T. A.; Hillas, A. M.; Kildea, J.; Knapp, J.; Krennrich, F.; Lang, M. J.; LeBohec, S.; Lessard, R. W.; Masterson, C.; Moriarty, P.; Quinn, J.; Rose, H. J.; Samuelson, F. W.; Sembroski, G. H.; Srinivasan, R.; Vassiliev, V. V.; Weekes, T. C. (1999)
    We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 ...
  • Search for Pulsed TeV Gamma-ray Emission from the Crab Pulsar 

    Lang, Mark; Gillanders, Gary; Lessard, R. W.; Bond, I. H.; Bradbury, S. M.; Buckley, J. H.; Burdett, A. M.; Carter-Lewis, D. A.; Catanese, M.; Cawley, M. F.; D'Vali, M.; Fegan, D. J.; Finley, J. P.; Gaidos, J. A.; Gillanders, G. H.; Hall, T.; Hillas, A. M.; Krennrich, F.; Lang, M. J.; Masterson, C.; Moriarty, P.; Quinn, J.; Rose, H. J.; Samuelson, F. W.; Sembroski, G. H.; Srinivasan, R.; Vassiliev, V. V.; Weekes, T. C. (1999)
    We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10 m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 ...
  • Cutoff in the TeV Energy Spectrum of Markarian 421 During Strong Flares in 2001 

    Lang, Mark; Gillanders, Gary (2001)
    Exceptionally strong and long lasting flaring activity of the blazar Markarian 421 (Mrk 421) occurred between January and March 2001. Based on the excellent signal-to-noise ratio of the data we derive the energy spectrum ...
  • Discovery of Spectral Variability of Markarian 421 at TeV Energies 

    Lang, Mark; Gillanders, Gary (2002)
    The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10m gamma-ray telescope taken in 2000/2001 revealed exceptionally strong and ...
  • Recent Results from the VERITAS Collaboration 

    Lang, Mark; Gillanders, Gary (2002)
    A decade after the discovery of TeV gamma-rays from the blazar Mrk 421 (Punch et al. 1992), the list of TeV blazars has increased to five BL Lac objects: Mrk 421 (Punch et al. 1992; Petry et al. 1996; Piron et al. 2001), ...
  • A Very High Energy Gamma-Ray Spectrum of 1ES 2344+514 

    Lang, Mark; Gillanders, Gary (2005)
    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 \citep{2344Catanese98}. This detection ...
  • Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope 

    Lang, Mark; Gillanders, Gary (2006)
    We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescope for a total of 65.5 hrs between 2003 and ...
  • TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters 

    Lang, Mark; Gillanders, Gary (2006)
    Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large scale structure formation shocks, galactic winds, or active galactic nuclei. Furthermore, gamma rays may ...
  • The First VERITAS Telescope 

    Lang, Mark; Gillanders, Gary (2006)
    The first atmospheric Cherenkov telescope of VERITAS (the Very Energetic Radiation Imaging Telescope Array System) has been in operation since February 2005. We present here a technical description of the instrument and a ...
  • Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002 

    Lang, Mark; Gillanders, Gary (2006)
    In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray Timing Explorer, the ...
  • Deep optical observations of the interaction of the SS 433 microquasar jet with the W 50 radio continuum shell 

    Redman, Matt P. (2007)
    Four mosaics of deep, continuum-subtracted, CCD images have been obtained over the extensive galactic radio continuum shell, W 50, which surrounds the remarkable stellar system SS 433. Two of these mosaics in the Halpha+[N ...
  • VLT / Infrared Integral Field Spectrometer Observations of Molecular Hydrogen Lines in the Knots in the Planetary Nebula NGC 7293 (the Helix Nebula) 

    Redman, Matt P. (2007)
    Knots are commonly found in nearby planetary nebulae (PNe) and star forming regions. Within PNe, knots are often found to be associated with the brightest parts of the nebulae and understanding the physics involved in knots ...
  • Rotational Modulation of M/L Dwarfs due to Magnetic Spots 

    Butler, Ray (2007)
    We find periodic I-band variability in two ultracool dwarfs, TVLM 513-46546 and 2MASS J00361617+1821104, on either side of the M/L dwarf boundary. Both of these targets are short-period radio transients, with the detected ...