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Your search keyword '"H. Teräsranta"' showing total 3 results
Start Over Author "H. Teräsranta" Journal aip conference proceedings
3 results on '"H. Teräsranta"'

1. EGRET observations of PKS 0528+134 from 1991 to 1997

Author

A. Witzel, Alan P. Marscher, R. C. Hartman, D. J. Thompson, Alex Kraus, E. Valtaoja, A. Mücke, H. Teräsranta, Reshmi Mukherjee, S. J. Wagner, M. Pohl, Stanley D. Hunter, P. F. Michelson, C. von Montigny, P. Sreekumar, Merja Tornikoski, E. J. Schneid, D. A. Kniffen, Brenda Dingus, Thomas P. Krichbaum, J. A. Esposito, Steven D. Bloom, H. A. Mayer-Hasselwander, Gottfried Kanbach, W. A. Mahoney, Olaf Reimer, P. L. Nolan, D. L. Bertsch, and Y. C. Lin

Subjects
Physics, Active galactic nucleus, biology, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Flux, Astronomy, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, biology.organism_classification, Spectral line, Egret, Spectral analysis, Gamma-ray burst, Astrophysics::Galaxy Astrophysics
Abstract

The compact, radio-loud quasar PKS 0528+134 has been one of the brightest active galactic nuclei (AGN) detected by EGRET. The flux history of the source including data up to March 1997, as well as the spectra measured during the flaring and non-flaring states is presented. Multiwavelength observations of PKS 0528+134 are also presented. A detailed relativistic SSC jet model agrees well with the multiwavelength spectrum; the data, however are insufficient to discriminate between this and other emission models.

Published
1997
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2. Multiwavelength observations of the February 1996 high-energy flare in the blazar 3C 279

Author

W. N. Johnson, Merja Tornikoski, R. Thompson, M. Pohl, J. Caplinger, Anthony Lawson, D. Nair, Werner Collmar, P. Turcotte, M. R. Kidger, Alan P. Marscher, R. C. Hartman, D. J. Thompson, Annalisa Celotti, Ann E. Wehrle, Walter Kieran Gear, John T. Stocke, G. Ghisellini, A. F. Schirmer, G. M. Madejski, Steve Penton, Wolfram Freudling, H. Teräsranta, A. Drucker, J. Dalton, L. Maraschi, Yoji Kondo, A. Sillanpää, Rita M. Sambruna, Chris Shrader, W. Xu, E. I. Robson, Patrick B. Hall, A. C. Zook, C. M. Urry, N. Gonzalez-Perez, C. E. Fichtel, K. McNaron-Brown, Ian M. McHardy, Thomas J. Balonek, Elena Pian, Jerry T. Bonnell, Stephen C. Unwin, Hugh D. Aller, S. J. Wagner, Matthew J. Renda, Aldo Treves, G. Tosti, Greg Aldering, H. Inoue, Renato Falomo, James R. Webb, F. Makino, L. O. Takalo, Paul S. Smith, M. Villata, Jamie Stevens, Joseph E. Pesce, C. M. Raiteri, M. Sikora, Margo F. Aller, P. Boltwood, R. I. Kollgaard, Dana E. Backman, B. McCollum, E. Valtaoja, and James D. Kurfess

Subjects
Physics, High energy, Brightness, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, law.invention, law, ROSAT, Astrophysics::Solar and Stellar Astrophysics, Spectral analysis, Gamma-ray burst, Blazar, Flare
Abstract

We report CGRO, RXTE, ASCA, ROSAT, IUE, HST and ground-based observations of a large flare in 3C 279 in February 1996. X-rays and γ-rays peaked simultaneously (within one day). We show simultaneous spectral energy distributions prior to and near the flare peak. The γ-ray flare was the brightest ever observed in this source.

Published
1997
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3. Radio to γ-ray observations of 3C 454.3:1993–1995

Author

L. Lanteri, A. G. Smith, K. Nilsson, G. F. Lawrence, Walter Kieran Gear, S. Katajainen, Merja Tornikoski, E. M. Moore, G. M. Madejski, H. Teräsranta, E. J. Hooper, W. N. Johnson, E. I. Robson, Reshmi Mukherjee, R. Wichmann, M. Villata, D. B. Pierkowski, A. Witzel, M. Sikora, C. von Montigny, A. Peila, G. de Francesco, J. N. González-Pérez, Jamie Stevens, A. D. Nair, Yiing Lin, C. M. Raiteri, L. O. Takalo, Hugh D. Aller, M. Pohl, Wolfgang Reich, Alan P. Marscher, R. C. Hartman, A. Sillanpää, Monique Aller, S. J. Wagner, M. F. Aller, Philip A. Hughes, Alex Kraus, T. Pursimo, Werner Collmar, M. Chiaberge, G. G. Lichti, G. Ghisellini, M. R. Kidger, M. C. Begelman, I. S. Glass, H. Steppe, S. D. Clements, K. McNaron-Brown, Thomas J. Balonek, Markos Georganopoulos, M. Herter, Pekka Heinämäki, and E. Valtaoja

Subjects
Physics, Brightness, Active galactic nucleus, Astronomy, Spectral analysis, Astrophysics, Gamma-ray burst, Galactic nuclei
Abstract

Results from a multiwaveband study of the γ-ray-bright compact radio source 3C 454.3 are presented.

Published
1997
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