Observation of high-energy gamma rays from the quasi-stellar object CTA 102

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

doi:10.1086/173058

Observation of high-energy gamma rays from the quasi-stellar object CTA 102

P. L. Nolan^*
, D. L. Bertsch
, C. E. Fichtel
, R. C. Hartman
, S. D. Hunter
, G. Kanbach
, D. A. Kniffen
, Y. C. Lin
, J. R. Mattox
, H. A. Mayer-Hasselwander
, P. F. Michelson
, C. Von Montigny
, 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

29 Citations (Scopus)

Abstract

The quasar CTA 102 (QSO 2230+114) was observed 4 times in 1991-1992 by the EGRET high-energy gamma-ray telescope on the Compton Gamma-Ray Observatory satellite. In the 1992 January 23-February 6 observation, emission was detected at the level (2.4 ± 0.5) × 10^-7 photons cm^-2 s^-1 (E > 100 MeV). The other observations produced upper limits or detections with lower significance which are consistent with the same flux. The photon spectrum can be represented by a power law with a number index of 2.6 ± 0.2, the softest so far observed by EGRET. The emitted gamma-ray luminosity, if isotropic, is 5 × 10⁴⁷ ergs s^-1 (H₀ = 75 km s^-1 Mpc^-1, q₀ = 0.5), although there are good reasons to believe that the gamma emission is strongly beamed.

Original language	English
Pages (from-to)	82-85
Number of pages	4
Journal	Astrophysical Journal
Volume	414
Issue number	1
DOIs	https://doi.org/10.1086/173058
Publication status	Published - 01-09-1993

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/173058

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Nolan, P. L., Bertsch, D. L., Fichtel, C. E., Hartman, R. C., Hunter, S. D., Kanbach, G., Kniffen, D. A., Lin, Y. C., Mattox, J. R., Mayer-Hasselwander, H. A., Michelson, P. F., Von Montigny, C., Schneid, E., Sreekumar, P., & Thompson, D. J. (1993). Observation of high-energy gamma rays from the quasi-stellar object CTA 102. Astrophysical Journal, 414(1), 82-85. https://doi.org/10.1086/173058

@article{f05eecd7a81040979a452db8c8e295ab,

title = "Observation of high-energy gamma rays from the quasi-stellar object CTA 102",

abstract = "The quasar CTA 102 (QSO 2230+114) was observed 4 times in 1991-1992 by the EGRET high-energy gamma-ray telescope on the Compton Gamma-Ray Observatory satellite. In the 1992 January 23-February 6 observation, emission was detected at the level (2.4 ± 0.5) × 10-7 photons cm-2 s-1 (E > 100 MeV). The other observations produced upper limits or detections with lower significance which are consistent with the same flux. The photon spectrum can be represented by a power law with a number index of 2.6 ± 0.2, the softest so far observed by EGRET. The emitted gamma-ray luminosity, if isotropic, is 5 × 1047 ergs s-1 (H0 = 75 km s-1 Mpc-1, q0 = 0.5), although there are good reasons to believe that the gamma emission is strongly beamed.",

author = "Nolan, \{P. L.\} and Bertsch, \{D. L.\} and Fichtel, \{C. E.\} and Hartman, \{R. C.\} 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 E. Schneid and P. Sreekumar and Thompson, \{D. J.\}",

year = "1993",

month = sep,

day = "1",

doi = "10.1086/173058",

language = "English",

volume = "414",

pages = "82--85",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Nolan, PL, Bertsch, DL, Fichtel, CE, Hartman, RC, Hunter, SD, Kanbach, G, Kniffen, DA, Lin, YC, Mattox, JR, Mayer-Hasselwander, HA, Michelson, PF, Von Montigny, C, Schneid, E, Sreekumar, P & Thompson, DJ 1993, 'Observation of high-energy gamma rays from the quasi-stellar object CTA 102', Astrophysical Journal, vol. 414, no. 1, pp. 82-85. https://doi.org/10.1086/173058

TY - JOUR

T1 - Observation of high-energy gamma rays from the quasi-stellar object CTA 102

AU - Nolan, P. L.

AU - Bertsch, D. L.

AU - Fichtel, C. E.

AU - Hartman, R. C.

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 - Schneid, E.

AU - Sreekumar, P.

AU - Thompson, D. J.

PY - 1993/9/1

Y1 - 1993/9/1

N2 - The quasar CTA 102 (QSO 2230+114) was observed 4 times in 1991-1992 by the EGRET high-energy gamma-ray telescope on the Compton Gamma-Ray Observatory satellite. In the 1992 January 23-February 6 observation, emission was detected at the level (2.4 ± 0.5) × 10-7 photons cm-2 s-1 (E > 100 MeV). The other observations produced upper limits or detections with lower significance which are consistent with the same flux. The photon spectrum can be represented by a power law with a number index of 2.6 ± 0.2, the softest so far observed by EGRET. The emitted gamma-ray luminosity, if isotropic, is 5 × 1047 ergs s-1 (H0 = 75 km s-1 Mpc-1, q0 = 0.5), although there are good reasons to believe that the gamma emission is strongly beamed.

AB - The quasar CTA 102 (QSO 2230+114) was observed 4 times in 1991-1992 by the EGRET high-energy gamma-ray telescope on the Compton Gamma-Ray Observatory satellite. In the 1992 January 23-February 6 observation, emission was detected at the level (2.4 ± 0.5) × 10-7 photons cm-2 s-1 (E > 100 MeV). The other observations produced upper limits or detections with lower significance which are consistent with the same flux. The photon spectrum can be represented by a power law with a number index of 2.6 ± 0.2, the softest so far observed by EGRET. The emitted gamma-ray luminosity, if isotropic, is 5 × 1047 ergs s-1 (H0 = 75 km s-1 Mpc-1, q0 = 0.5), although there are good reasons to believe that the gamma emission is strongly beamed.

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U2 - 10.1086/173058

DO - 10.1086/173058

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SN - 0004-637X

VL - 414

SP - 82

EP - 85

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Observation of high-energy gamma rays from the quasi-stellar object CTA 102

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