INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane

B. J. Teegarden; K. Watanabe; P. Jean; J. Knödlseder; V. Lonjou; J. P. Roques; G. K. Skinner; P. von Ballmoos; G. Weidenspointner; A. Bazzano; Y. M. Butt; A. Decourchelle; A. C. Fabian; A. Goldwurm; M. Güdel; D. C. Hannikainen; D. H. Hartmann; Allan Hornstrup; W.H. G. Lewin; K. Makishima; A. Malzac; J. Miller; A. N. Parmar; S. P. Reynolds; R. E. Rothschild; V. Schönfelder; J. A. Tomsick; J. Vink

INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane

B. J. Teegarden, K. Watanabe, P. Jean, J. Knödlseder, V. Lonjou, J. P. Roques, G. K. Skinner, P. von Ballmoos, G. Weidenspointner, A. Bazzano, Y. M. Butt, A. Decourchelle, A. C. Fabian, A. Goldwurm, M. Güdel, D. C. Hannikainen, D. H. Hartmann, Allan Hornstrup, W.H. G. Lewin, K. MakishimaA. Malzac, J. Miller, A. N. Parmar, S. P. Reynolds, R. E. Rothschild, V. Schönfelder, J. A. Tomsick, J. Vink

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Abstract

The center of our Galaxy is a known strong source of electron‐positron 511 keV annihilation radiation. Thus far, however, there have been no reliable detections of annihilation radiation outside of the central radian of our Galaxy. One of the primary objectives of the INTEGRAL (International Gamma‐Ray Astrophysics Laboratory) mission, launched in 2002 October, is the detailed study of this radiation. The Spectrometer on INTEGRAL (SPI) is a high‐resolution, coded‐aperture gamma‐ray telescope with an unprecedented combination of sensitivity, angular resolution, and energy resolution. We report results from the first 10 months of observation. During this period a significant fraction of the observing time was spent in or near the Galactic plane. No positive annihilation flux was detected outside of the central region () of our Galaxy. In this paper we describe the observations and data analysis methods and give limits on the 511 keV flux.

Original language	English
Journal	Astrophysical Journal
Volume	621
Pages (from-to)	296-300
ISSN	0004-637X
Publication status	Published - 2005

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Teegarden, B. J., Watanabe, K., Jean, P., Knödlseder, J., Lonjou, V., Roques, J. P., Skinner, G. K., von Ballmoos, P., Weidenspointner, G., Bazzano, A., Butt, Y. M., Decourchelle, A., Fabian, A. C., Goldwurm, A., Güdel, M., Hannikainen, D. C., Hartmann, D. H., Hornstrup, A., Lewin, W. H. G., ... Vink, J. (2005). INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane. Astrophysical Journal, 621, 296-300.

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title = "INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane",

abstract = "The center of our Galaxy is a known strong source of electron‐positron 511 keV annihilation radiation. Thus far, however, there have been no reliable detections of annihilation radiation outside of the central radian of our Galaxy. One of the primary objectives of the INTEGRAL (International Gamma‐Ray Astrophysics Laboratory) mission, launched in 2002 October, is the detailed study of this radiation. The Spectrometer on INTEGRAL (SPI) is a high‐resolution, coded‐aperture gamma‐ray telescope with an unprecedented combination of sensitivity, angular resolution, and energy resolution. We report results from the first 10 months of observation. During this period a significant fraction of the observing time was spent in or near the Galactic plane. No positive annihilation flux was detected outside of the central region () of our Galaxy. In this paper we describe the observations and data analysis methods and give limits on the 511 keV flux.",

author = "Teegarden, {B. J.} and K. Watanabe and P. Jean and J. Kn{\"o}dlseder and V. Lonjou and Roques, {J. P.} and Skinner, {G. K.} and {von Ballmoos}, P. and G. Weidenspointner and A. Bazzano and Butt, {Y. M.} and A. Decourchelle and Fabian, {A. C.} and A. Goldwurm and M. G{\"u}del and Hannikainen, {D. C.} and Hartmann, {D. H.} and Allan Hornstrup and Lewin, {W.H. G.} and K. Makishima and A. Malzac and J. Miller and Parmar, {A. N.} and Reynolds, {S. P.} and Rothschild, {R. E.} and V. Sch{\"o}nfelder and Tomsick, {J. A.} and J. Vink",

year = "2005",

language = "English",

volume = "621",

pages = "296--300",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

}

Teegarden, BJ, Watanabe, K, Jean, P, Knödlseder, J, Lonjou, V, Roques, JP, Skinner, GK, von Ballmoos, P, Weidenspointner, G, Bazzano, A, Butt, YM, Decourchelle, A, Fabian, AC, Goldwurm, A, Güdel, M, Hannikainen, DC, Hartmann, DH, Hornstrup, A, Lewin, WHG, Makishima, K, Malzac, A, Miller, J, Parmar, AN, Reynolds, SP, Rothschild, RE, Schönfelder, V, Tomsick, JA & Vink, J 2005, 'INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane', Astrophysical Journal, vol. 621, pp. 296-300.

TY - JOUR

T1 - INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane

AU - Teegarden, B. J.

AU - Watanabe, K.

AU - Jean, P.

AU - Knödlseder, J.

AU - Lonjou, V.

AU - Roques, J. P.

AU - Skinner, G. K.

AU - von Ballmoos, P.

AU - Weidenspointner, G.

AU - Bazzano, A.

AU - Butt, Y. M.

AU - Decourchelle, A.

AU - Fabian, A. C.

AU - Goldwurm, A.

AU - Güdel, M.

AU - Hannikainen, D. C.

AU - Hartmann, D. H.

AU - Hornstrup, Allan

AU - Lewin, W.H. G.

AU - Makishima, K.

AU - Malzac, A.

AU - Miller, J.

AU - Parmar, A. N.

AU - Reynolds, S. P.

AU - Rothschild, R. E.

AU - Schönfelder, V.

AU - Tomsick, J. A.

AU - Vink, J.

PY - 2005

Y1 - 2005

N2 - The center of our Galaxy is a known strong source of electron‐positron 511 keV annihilation radiation. Thus far, however, there have been no reliable detections of annihilation radiation outside of the central radian of our Galaxy. One of the primary objectives of the INTEGRAL (International Gamma‐Ray Astrophysics Laboratory) mission, launched in 2002 October, is the detailed study of this radiation. The Spectrometer on INTEGRAL (SPI) is a high‐resolution, coded‐aperture gamma‐ray telescope with an unprecedented combination of sensitivity, angular resolution, and energy resolution. We report results from the first 10 months of observation. During this period a significant fraction of the observing time was spent in or near the Galactic plane. No positive annihilation flux was detected outside of the central region () of our Galaxy. In this paper we describe the observations and data analysis methods and give limits on the 511 keV flux.

AB - The center of our Galaxy is a known strong source of electron‐positron 511 keV annihilation radiation. Thus far, however, there have been no reliable detections of annihilation radiation outside of the central radian of our Galaxy. One of the primary objectives of the INTEGRAL (International Gamma‐Ray Astrophysics Laboratory) mission, launched in 2002 October, is the detailed study of this radiation. The Spectrometer on INTEGRAL (SPI) is a high‐resolution, coded‐aperture gamma‐ray telescope with an unprecedented combination of sensitivity, angular resolution, and energy resolution. We report results from the first 10 months of observation. During this period a significant fraction of the observing time was spent in or near the Galactic plane. No positive annihilation flux was detected outside of the central region () of our Galaxy. In this paper we describe the observations and data analysis methods and give limits on the 511 keV flux.

M3 - Journal article

SN - 0004-637X

VL - 621

SP - 296

EP - 300

JO - Astrophysical Journal

JF - Astrophysical Journal

ER -

INTEGRAL SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane

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