Abstract:
The Crab Nebula was observed in TeV gamma rays with the Whipple Observatory high-resolution atmospheric Cherenkov camera and a signal was detected at the 20 σ level. The energy spectrum derived has the form N(E) × dE = 2.5 × 10 -10 (E/0.4 TeV) -2.4±0.3 photons cm -2 s -1 TeV -1 between 0.4 and 4 TeV. There is no evidence for the pulsar periodicity, and the flux is steady on a monthly time scale. If this signal is used to optimize the technique for gamma-ray detection, then a flux one-tenth that of the Crab can be detected at the 3 σ level in 60 hr of integration time. For an on-axis source the angular resolution is shown to be ±0°1.
Registro:
Documento: |
Artículo
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Título: | Gamma-ray observations of the Crab Nebula at TeV energies |
Autor: | Vacanti, G.; Cawley, M.F.; Colombo, E.; Fegan, D.J.; Hillas, A.M.; Kwok, P.W.; Lang, M.J.; Lamb, R.C.; Lewis, D.A.; Macomb, D.J.; O'Klaherty, K.S.; Reynolds, P.T.; Weekes, T.C. |
Filiación: | Physics Department, Iowa State University, Ames, IA 50011, United States SAP, CEN-SACLAY, 91191 Gif-sur-Yvette, CEDEX, France Physics Department, St. Patrick's College, Maynooth, County Kildare, Ireland Whipple Observatory, Harvard-Smithsonian Ctr. Astrophys. Inst. Astronomia y Fis. del Espacio, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina Physics Department, University College, Dublin, Belfield, Dublin 4, Ireland Physics Department, University of Leeds, Leeds LS2 9JT, United Kingdom NASA, Goddard Space Flight Center, Greenbelt, MD 20771, United States Computer Science Corporation, Space Telescope Institute, 3700 San Martin Drive, Baltimore, MD 21218, United States Whipple Observatory, Box 97, Amado, AZ 85645-0097, United States
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Palabras clave: | Gamma rays: general; Nebulae: Crab Nebula; Pulsars; Radiation mechanisms |
Año: | 1991
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Volumen: | 377
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Número: | 2 PART 1
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Página de inicio: | 467
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Página de fin: | 479
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DOI: |
http://dx.doi.org/10.1086/170376 |
Título revista: | Astrophysical Journal
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Título revista abreviado: | Astrophys. J.
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ISSN: | 0004637X
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v377_n2PART1_p467_Vacanti |
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Citas:
---------- APA ----------
Vacanti, G., Cawley, M.F., Colombo, E., Fegan, D.J., Hillas, A.M., Kwok, P.W., Lang, M.J.,..., Weekes, T.C.
(1991)
. Gamma-ray observations of the Crab Nebula at TeV energies. Astrophysical Journal, 377(2 PART 1), 467-479.
http://dx.doi.org/10.1086/170376---------- CHICAGO ----------
Vacanti, G., Cawley, M.F., Colombo, E., Fegan, D.J., Hillas, A.M., Kwok, P.W., et al.
"Gamma-ray observations of the Crab Nebula at TeV energies"
. Astrophysical Journal 377, no. 2 PART 1
(1991) : 467-479.
http://dx.doi.org/10.1086/170376---------- MLA ----------
Vacanti, G., Cawley, M.F., Colombo, E., Fegan, D.J., Hillas, A.M., Kwok, P.W., et al.
"Gamma-ray observations of the Crab Nebula at TeV energies"
. Astrophysical Journal, vol. 377, no. 2 PART 1, 1991, pp. 467-479.
http://dx.doi.org/10.1086/170376---------- VANCOUVER ----------
Vacanti, G., Cawley, M.F., Colombo, E., Fegan, D.J., Hillas, A.M., Kwok, P.W., et al. Gamma-ray observations of the Crab Nebula at TeV energies. Astrophys. J. 1991;377(2 PART 1):467-479.
http://dx.doi.org/10.1086/170376