The TeV gamma-ray spectrum of markarian 421 during an intense flare

J. A. Zweerink; C. W. Akerlof; S. D. Biller; P. Boyle; J. H. Buckley; A. Burdett; J. Bussóns Gordo; D. A. Carter-Lewis; M. Catanese; M. F. Cawley; D. J. Fegan; J. P. Finley; J. A. Gaidos; A. M. Hillas; F. Krennrich; R. C. Lamb; R. W. Lessard; J. E. McEnery; G. Mohanty; J. Quinn; A. J. Rodgers; H. J. Rose; F. W. Samuelson; M. S. Schubnell; G. Sembroski; R. Srinivasan; T. C. Weekes; C. Wilson

doi:10.1086/311036

The TeV gamma-ray spectrum of markarian 421 during an intense flare

J. A. Zweerink
, C. W. Akerlof
, S. D. Biller
, P. Boyle
, J. H. Buckley
, A. Burdett
, J. Bussóns Gordo
, D. A. Carter-Lewis
, M. Catanese
, M. F. Cawley
, D. J. Fegan
, J. P. Finley
, J. A. Gaidos
, A. M. Hillas
, F. Krennrich
, R. C. Lamb
, R. W. Lessard
, J. E. McEnery
, G. Mohanty
, J. Quinn

A. J. Rodgers, H. J. Rose, F. W. Samuelson, M. S. Schubnell, G. Sembroski, R. Srinivasan, T. C. Weekes, C. Wilson

Department of Physics

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

39 Scopus citations

Abstract

We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of -2.56 ± 0.07 ± 0.1 (statistical and systematic errors). The spectrum extends above 5 TeV with no evidence for a cutoff, favoring determinations of the extragalactic infrared energy density that do not produce a sharp cutoff at these energies.

Original language	English
Pages (from-to)	L141-L144
Journal	Astrophysical Journal
Volume	490
Issue number	2 PART II
DOIs	https://doi.org/10.1086/311036
State	Published - 1997

Keywords

BL Lacertae objects: individual (Markarian 421)
Gamma rays: observations

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10.1086/311036

Cite this

Zweerink, J. A., Akerlof, C. W., Biller, S. D., Boyle, P., Buckley, J. H., Burdett, A., Bussóns Gordo, J., Carter-Lewis, D. A., Catanese, M., Cawley, M. F., Fegan, D. J., Finley, J. P., Gaidos, J. A., Hillas, A. M., Krennrich, F., Lamb, R. C., Lessard, R. W., McEnery, J. E., Mohanty, G., ... Wilson, C. (1997). The TeV gamma-ray spectrum of markarian 421 during an intense flare. Astrophysical Journal, 490(2 PART II), L141-L144. https://doi.org/10.1086/311036

@article{d2a00e54b8624f65b8aeac28dec72f72,

title = "The TeV gamma-ray spectrum of markarian 421 during an intense flare",

abstract = "We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of -2.56 ± 0.07 ± 0.1 (statistical and systematic errors). The spectrum extends above 5 TeV with no evidence for a cutoff, favoring determinations of the extragalactic infrared energy density that do not produce a sharp cutoff at these energies.",

keywords = "BL Lacertae objects: individual (Markarian 421), Gamma rays: observations",

author = "Zweerink, \{J. A.\} and Akerlof, \{C. W.\} and Biller, \{S. D.\} and P. Boyle and Buckley, \{J. H.\} and A. Burdett and \{Buss{\'o}ns Gordo\}, J. and Carter-Lewis, \{D. A.\} and M. Catanese and Cawley, \{M. F.\} and Fegan, \{D. J.\} and Finley, \{J. P.\} and Gaidos, \{J. A.\} and Hillas, \{A. M.\} and F. Krennrich and Lamb, \{R. C.\} and Lessard, \{R. W.\} and McEnery, \{J. E.\} and G. Mohanty and J. Quinn and Rodgers, \{A. J.\} and Rose, \{H. J.\} and Samuelson, \{F. W.\} and Schubnell, \{M. S.\} and G. Sembroski and R. Srinivasan and Weekes, \{T. C.\} and C. Wilson",

year = "1997",

doi = "10.1086/311036",

language = "English",

volume = "490",

pages = "L141--L144",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "2 PART II",

}

Zweerink, JA, Akerlof, CW, Biller, SD, Boyle, P, Buckley, JH, Burdett, A, Bussóns Gordo, J, Carter-Lewis, DA, Catanese, M, Cawley, MF, Fegan, DJ, Finley, JP, Gaidos, JA, Hillas, AM, Krennrich, F, Lamb, RC, Lessard, RW, McEnery, JE, Mohanty, G, Quinn, J, Rodgers, AJ, Rose, HJ, Samuelson, FW, Schubnell, MS, Sembroski, G, Srinivasan, R, Weekes, TC & Wilson, C 1997, 'The TeV gamma-ray spectrum of markarian 421 during an intense flare', Astrophysical Journal, vol. 490, no. 2 PART II, pp. L141-L144. https://doi.org/10.1086/311036

TY - JOUR

T1 - The TeV gamma-ray spectrum of markarian 421 during an intense flare

AU - Zweerink, J. A.

AU - Akerlof, C. W.

AU - Biller, S. D.

AU - Boyle, P.

AU - Buckley, J. H.

AU - Burdett, A.

AU - Bussóns Gordo, J.

AU - Carter-Lewis, D. A.

AU - Catanese, M.

AU - Cawley, M. F.

AU - Fegan, D. J.

AU - Finley, J. P.

AU - Gaidos, J. A.

AU - Hillas, A. M.

AU - Krennrich, F.

AU - Lamb, R. C.

AU - Lessard, R. W.

AU - McEnery, J. E.

AU - Mohanty, G.

AU - Quinn, J.

AU - Rodgers, A. J.

AU - Rose, H. J.

AU - Samuelson, F. W.

AU - Schubnell, M. S.

AU - Sembroski, G.

AU - Srinivasan, R.

AU - Weekes, T. C.

AU - Wilson, C.

PY - 1997

Y1 - 1997

N2 - We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of -2.56 ± 0.07 ± 0.1 (statistical and systematic errors). The spectrum extends above 5 TeV with no evidence for a cutoff, favoring determinations of the extragalactic infrared energy density that do not produce a sharp cutoff at these energies.

AB - We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of -2.56 ± 0.07 ± 0.1 (statistical and systematic errors). The spectrum extends above 5 TeV with no evidence for a cutoff, favoring determinations of the extragalactic infrared energy density that do not produce a sharp cutoff at these energies.

KW - BL Lacertae objects: individual (Markarian 421)

KW - Gamma rays: observations

UR - https://www.scopus.com/pages/publications/0009218995

U2 - 10.1086/311036

DO - 10.1086/311036

M3 - Article

AN - SCOPUS:0009218995

SN - 0004-637X

VL - 490

SP - L141-L144

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART II

ER -

The TeV gamma-ray spectrum of markarian 421 during an intense flare

Abstract

Keywords

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