Upper limits on TeV gamma-ray emission from active galactic nuclei

A. D. Kerrick; C. W. Akerlof; S. Biller; J. Buckley; D. A. Carter-Lewis; M. F. Cawley; M. Chantell; V. Connaughton; D. J. Fegan; S. Fennell; J. Gaidos; A. M. Hillas; P. W. Kwok; R. C. Lamb; T. Lappin; R. Lessard; J. Mcenery; D. I. Meyer; G. Mohanty; J. Quinn; H. J. Rose; A. C. Rovero; G. Sembroski; M. S. Schubnell; M. Punch; T. C. Weekes; M. West; C. Wilson; J. Zweerink

doi:10.1086/176331

Upper limits on TeV gamma-ray emission from active galactic nuclei

A. D. Kerrick, C. W. Akerlof, S. Biller, J. Buckley, D. A. Carter-Lewis, M. F. Cawley, M. Chantell, V. Connaughton, D. J. Fegan, S. Fennell, J. Gaidos, A. M. Hillas, P. W. Kwok, R. C. Lamb, T. Lappin, R. Lessard, J. Mcenery, D. I. Meyer, G. Mohanty, J. QuinnH. J. Rose, A. C. Rovero, G. Sembroski, M. S. Schubnell, M. Punch, T. C. Weekes, M. West, C. Wilson, J. Zweerink

Department of Physics

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Abstract

The results of a search for TeV gamma-ray emission from 35 active galactic nuclei (AGNs) using the Whippie Observatory High Resolution Atmospheric Cerenkov Camera are reported. Fifteen of these objects have been detected at GeV energies by the EGRET experiment on the Compton Gamma Ray Observatory. None of the 35 objects gave a signal at the 3 σ level; Mrk 421 remains the only AGN detected at TeV energies. The absence of a TeV signal may imply a change in the primary source spectrum and/or the effect of absorption by pair production on intergalactic infrared photons.

Original language	English
Pages (from-to)	588-598
Number of pages	11
Journal	Astrophysical Journal
Volume	452
Issue number	2
DOIs	https://doi.org/10.1086/176331
State	Published - Oct 20 1995

Keywords

Galaxies: active
Galaxies: nuclei
Gamma rays: observations

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10.1086/176331

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Kerrick, A. D., Akerlof, C. W., Biller, S., Buckley, J., Carter-Lewis, D. A., Cawley, M. F., Chantell, M., Connaughton, V., Fegan, D. J., Fennell, S., Gaidos, J., Hillas, A. M., Kwok, P. W., Lamb, R. C., Lappin, T., Lessard, R., Mcenery, J., Meyer, D. I., Mohanty, G., ... Zweerink, J. (1995). Upper limits on TeV gamma-ray emission from active galactic nuclei. Astrophysical Journal, 452(2), 588-598. https://doi.org/10.1086/176331

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title = "Upper limits on TeV gamma-ray emission from active galactic nuclei",

abstract = "The results of a search for TeV gamma-ray emission from 35 active galactic nuclei (AGNs) using the Whippie Observatory High Resolution Atmospheric Cerenkov Camera are reported. Fifteen of these objects have been detected at GeV energies by the EGRET experiment on the Compton Gamma Ray Observatory. None of the 35 objects gave a signal at the 3 σ level; Mrk 421 remains the only AGN detected at TeV energies. The absence of a TeV signal may imply a change in the primary source spectrum and/or the effect of absorption by pair production on intergalactic infrared photons.",

keywords = "Galaxies: active, Galaxies: nuclei, Gamma rays: observations",

author = "Kerrick, {A. D.} and Akerlof, {C. W.} and S. Biller and J. Buckley and Carter-Lewis, {D. A.} and Cawley, {M. F.} and M. Chantell and V. Connaughton and Fegan, {D. J.} and S. Fennell and J. Gaidos and Hillas, {A. M.} and Kwok, {P. W.} and Lamb, {R. C.} and T. Lappin and R. Lessard and J. Mcenery and Meyer, {D. I.} and G. Mohanty and J. Quinn and Rose, {H. J.} and Rovero, {A. C.} and G. Sembroski and Schubnell, {M. S.} and M. Punch and Weekes, {T. C.} and M. West and C. Wilson and J. Zweerink",

year = "1995",

month = oct,

day = "20",

doi = "10.1086/176331",

language = "English",

volume = "452",

pages = "588--598",

journal = "Astrophysical Journal",

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Kerrick, AD, Akerlof, CW, Biller, S, Buckley, J, Carter-Lewis, DA, Cawley, MF, Chantell, M, Connaughton, V, Fegan, DJ, Fennell, S, Gaidos, J, Hillas, AM, Kwok, PW, Lamb, RC, Lappin, T, Lessard, R, Mcenery, J, Meyer, DI, Mohanty, G, Quinn, J, Rose, HJ, Rovero, AC, Sembroski, G, Schubnell, MS, Punch, M, Weekes, TC, West, M, Wilson, C & Zweerink, J 1995, 'Upper limits on TeV gamma-ray emission from active galactic nuclei', Astrophysical Journal, vol. 452, no. 2, pp. 588-598. https://doi.org/10.1086/176331

TY - JOUR

T1 - Upper limits on TeV gamma-ray emission from active galactic nuclei

AU - Kerrick, A. D.

AU - Akerlof, C. W.

AU - Biller, S.

AU - Buckley, J.

AU - Carter-Lewis, D. A.

AU - Cawley, M. F.

AU - Chantell, M.

AU - Connaughton, V.

AU - Fegan, D. J.

AU - Fennell, S.

AU - Gaidos, J.

AU - Hillas, A. M.

AU - Kwok, P. W.

AU - Lamb, R. C.

AU - Lappin, T.

AU - Lessard, R.

AU - Mcenery, J.

AU - Meyer, D. I.

AU - Mohanty, G.

AU - Quinn, J.

AU - Rose, H. J.

AU - Rovero, A. C.

AU - Sembroski, G.

AU - Schubnell, M. S.

AU - Punch, M.

AU - Weekes, T. C.

AU - West, M.

AU - Wilson, C.

AU - Zweerink, J.

PY - 1995/10/20

Y1 - 1995/10/20

N2 - The results of a search for TeV gamma-ray emission from 35 active galactic nuclei (AGNs) using the Whippie Observatory High Resolution Atmospheric Cerenkov Camera are reported. Fifteen of these objects have been detected at GeV energies by the EGRET experiment on the Compton Gamma Ray Observatory. None of the 35 objects gave a signal at the 3 σ level; Mrk 421 remains the only AGN detected at TeV energies. The absence of a TeV signal may imply a change in the primary source spectrum and/or the effect of absorption by pair production on intergalactic infrared photons.

AB - The results of a search for TeV gamma-ray emission from 35 active galactic nuclei (AGNs) using the Whippie Observatory High Resolution Atmospheric Cerenkov Camera are reported. Fifteen of these objects have been detected at GeV energies by the EGRET experiment on the Compton Gamma Ray Observatory. None of the 35 objects gave a signal at the 3 σ level; Mrk 421 remains the only AGN detected at TeV energies. The absence of a TeV signal may imply a change in the primary source spectrum and/or the effect of absorption by pair production on intergalactic infrared photons.

KW - Galaxies: active

KW - Galaxies: nuclei

KW - Gamma rays: observations

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U2 - 10.1086/176331

DO - 10.1086/176331

M3 - Article

AN - SCOPUS:0001342946

SN - 0004-637X

VL - 452

SP - 588

EP - 598

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Upper limits on TeV gamma-ray emission from active galactic nuclei

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Keywords

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