Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3

R. C. Hartman; D. L. Bertsch; B. L. Dingus; C. E. Flchtel; S. D. Hunter; G. Kanbach; D. A. Kniffen; Y. C. Lin; J. R. Mattox; H. A. Mayer-Hasselwander; P. F. Michelson; C. Von Montigny; P. L. Nolan; B. G. Plner; E. Schneid; P. Sreekumar; D. J. Thompson

doi:10.1086/186801

Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3

R. C. Hartman^*
, D. L. Bertsch
, B. L. Dingus
, C. E. Flchtel
, S. D. Hunter
, G. Kanbach
, D. A. Kniffen
, Y. C. Lin
, J. R. Mattox
, H. A. Mayer-Hasselwander
, P. F. Michelson
, C. Von Montigny
, P. L. Nolan
, B. G. Plner
, E. Schneid
, P. Sreekumar
, D. J. Thompson

^*Corresponding author for this work

Manipal Centre for Natural Sciences, Manipal

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

High-energy gamma radiation has been observed from the optically violent variable (OVV) quasar 3C 454.3 (PKS 2251 + 158) by the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Observatory. During the 1992 January-February observation, the emission showed a power-law photon spectrum with an exponent of -2.18 ± 0.08. The flux density (E > 100 MeV) was observed to vary within the range (0.4-1.4) × 10^-6 photon cm^-2 s^-1 on a time scale of less than a week. Lower sensitivity observations during 1992 April and May also detected emission within that range, but with lower statistical significance. An earlier low-sensitivity exposure during 1991 August gave a 95% confidence upper limit of 0.26 x 10~6 photon cm^-2 s^-1. The similarity of the gamma-ray emission of 3C 454.3 to that of 3C 279 parallels the similarity of these two objects at lower frequencies.

Original language	English
Pages (from-to)	L41-L44
Journal	Astrophysical Journal
Volume	407
Issue number	2 PART II
DOIs	https://doi.org/10.1086/186801
Publication status	Published - 1993

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/186801

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Hartman, R. C., Bertsch, D. L., Dingus, B. L., Flchtel, C. E., Hunter, S. D., Kanbach, G., Kniffen, D. A., Lin, Y. C., Mattox, J. R., Mayer-Hasselwander, H. A., Michelson, P. F., Von Montigny, C., Nolan, P. L., Plner, B. G., Schneid, E., Sreekumar, P., & Thompson, D. J. (1993). Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3. Astrophysical Journal, 407(2 PART II), L41-L44. https://doi.org/10.1086/186801

@article{8e2a99e838414437b6bc2c9b742a0c15,

title = "Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3",

abstract = "High-energy gamma radiation has been observed from the optically violent variable (OVV) quasar 3C 454.3 (PKS 2251 + 158) by the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Observatory. During the 1992 January-February observation, the emission showed a power-law photon spectrum with an exponent of -2.18 ± 0.08. The flux density (E > 100 MeV) was observed to vary within the range (0.4-1.4) × 10-6 photon cm-2 s-1 on a time scale of less than a week. Lower sensitivity observations during 1992 April and May also detected emission within that range, but with lower statistical significance. An earlier low-sensitivity exposure during 1991 August gave a 95\% confidence upper limit of 0.26 x 10\textasciitilde{}6 photon cm-2 s-1. The similarity of the gamma-ray emission of 3C 454.3 to that of 3C 279 parallels the similarity of these two objects at lower frequencies.",

author = "Hartman, \{R. C.\} and Bertsch, \{D. L.\} and Dingus, \{B. L.\} and Flchtel, \{C. E.\} and Hunter, \{S. D.\} and G. Kanbach and Kniffen, \{D. A.\} and Lin, \{Y. C.\} and Mattox, \{J. R.\} and Mayer-Hasselwander, \{H. A.\} and Michelson, \{P. F.\} and \{Von Montigny\}, C. and Nolan, \{P. L.\} and Plner, \{B. G.\} and E. Schneid and P. Sreekumar and Thompson, \{D. J.\}",

year = "1993",

doi = "10.1086/186801",

language = "English",

volume = "407",

pages = "L41--L44",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2 PART II",

}

Hartman, RC, Bertsch, DL, Dingus, BL, Flchtel, CE, Hunter, SD, Kanbach, G, Kniffen, DA, Lin, YC, Mattox, JR, Mayer-Hasselwander, HA, Michelson, PF, Von Montigny, C, Nolan, PL, Plner, BG, Schneid, E, Sreekumar, P & Thompson, DJ 1993, 'Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3', Astrophysical Journal, vol. 407, no. 2 PART II, pp. L41-L44. https://doi.org/10.1086/186801

TY - JOUR

T1 - Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3

AU - Hartman, R. C.

AU - Bertsch, D. L.

AU - Dingus, B. L.

AU - Flchtel, C. E.

AU - Hunter, S. D.

AU - Kanbach, G.

AU - Kniffen, D. A.

AU - Lin, Y. C.

AU - Mattox, J. R.

AU - Mayer-Hasselwander, H. A.

AU - Michelson, P. F.

AU - Von Montigny, C.

AU - Nolan, P. L.

AU - Plner, B. G.

AU - Schneid, E.

AU - Sreekumar, P.

AU - Thompson, D. J.

PY - 1993

Y1 - 1993

N2 - High-energy gamma radiation has been observed from the optically violent variable (OVV) quasar 3C 454.3 (PKS 2251 + 158) by the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Observatory. During the 1992 January-February observation, the emission showed a power-law photon spectrum with an exponent of -2.18 ± 0.08. The flux density (E > 100 MeV) was observed to vary within the range (0.4-1.4) × 10-6 photon cm-2 s-1 on a time scale of less than a week. Lower sensitivity observations during 1992 April and May also detected emission within that range, but with lower statistical significance. An earlier low-sensitivity exposure during 1991 August gave a 95% confidence upper limit of 0.26 x 10~6 photon cm-2 s-1. The similarity of the gamma-ray emission of 3C 454.3 to that of 3C 279 parallels the similarity of these two objects at lower frequencies.

AB - High-energy gamma radiation has been observed from the optically violent variable (OVV) quasar 3C 454.3 (PKS 2251 + 158) by the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Observatory. During the 1992 January-February observation, the emission showed a power-law photon spectrum with an exponent of -2.18 ± 0.08. The flux density (E > 100 MeV) was observed to vary within the range (0.4-1.4) × 10-6 photon cm-2 s-1 on a time scale of less than a week. Lower sensitivity observations during 1992 April and May also detected emission within that range, but with lower statistical significance. An earlier low-sensitivity exposure during 1991 August gave a 95% confidence upper limit of 0.26 x 10~6 photon cm-2 s-1. The similarity of the gamma-ray emission of 3C 454.3 to that of 3C 279 parallels the similarity of these two objects at lower frequencies.

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AN - SCOPUS:21144475297

SN - 0004-637X

VL - 407

SP - L41-L44

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART II

ER -

Egret detection of high-energy gamma radiation from the OVV QUASAR 3C 454.3

Abstract

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