Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001

F. Krennrich; H. M. Badran; I. H. Bond; S. M. Bradbury; J. H. Buckley; D. A. Carter-Lewis; M. Catanese; W. Cui; S. Dunlea; D. Das; I. De La Calle Perez; D. J. Fegan; S. J. Fegan; J. P. Finley; J. A. Gaidos; K. Gibbs; G. H. Gillanders; T. A. Hall; A. M. Hillas; J. Holder; D. Horan; M. Jordan; M. Kertzman; D. Kieda; J. Kildea; J. Knapp; K. Kosack; M. J. Lang; S. LeBohec; B. McKernan; P. Moriarty; D. Müller; R. Ong; R. Pallassini; D. Petry; J. Quinn; N. W. Reay; P. T. Reynolds; H. J. Rose; G. H. Sembroski; R. Sidwell; N. Stanton; S. P. Swordy; V. V. Vassiliev; S. P. Wakely; T. C. Weekes

doi:10.1086/324221

Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001

F. Krennrich
, H. M. Badran
, I. H. Bond
, S. M. Bradbury
, J. H. Buckley
, D. A. Carter-Lewis
, M. Catanese
, W. Cui
, S. Dunlea
, D. Das
, I. De La Calle Perez
, D. J. Fegan
, S. J. Fegan
, J. P. Finley
, J. A. Gaidos
, K. Gibbs
, G. H. Gillanders
, T. A. Hall
, A. M. Hillas
, J. Holder

D. Horan, M. Jordan, M. Kertzman, D. Kieda, J. Kildea, J. Knapp, K. Kosack, M. J. Lang, S. LeBohec, B. McKernan, P. Moriarty, D. Müller, R. Ong, R. Pallassini, D. Petry, J. Quinn, N. W. Reay, P. T. Reynolds, H. J. Rose, G. H. Sembroski, R. Sidwell, N. Stanton, S. P. Swordy, V. V. Vassiliev, S. P. Wakely, T. C. Weekes

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

Abstract

Exceptionally strong and long-lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal-to-noise ratio of the data, we derive the energy spectrum between 260 GeV and 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead, the data can be described by a power law with exponential cutoff: dN/dE ∝ E^{-2.14 ± 0.03stat}e-^E/E0 m^-2 s^-1 TeV^-1 with E₀ = 4.3 ± 0.3_stat TeV. Mrk 421 is the second γ-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV.

Original language	English
Pages (from-to)	L45-L48
Journal	Astrophysical Journal
Volume	560
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/324221
Publication status	Published - 10 Oct 2001
Externally published	Yes

Keywords

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

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10.1086/324221

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Krennrich, F., Badran, H. M., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Catanese, M., Cui, W., Dunlea, S., Das, D., De La Calle Perez, I., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gillanders, G. H., Hall, T. A., Hillas, A. M., ... Weekes, T. C. (2001). Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001. Astrophysical Journal, 560(1 PART 2), L45-L48. https://doi.org/10.1086/324221

@article{d4c575bb01da4e6bbb4dffca0354b356,

title = "Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001",

abstract = "Exceptionally strong and long-lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal-to-noise ratio of the data, we derive the energy spectrum between 260 GeV and 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead, the data can be described by a power law with exponential cutoff: dN/dE ∝ E-2.14 ± 0.03state-E/E0 m-2 s-1 TeV-1 with E0 = 4.3 ± 0.3stat TeV. Mrk 421 is the second γ-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV.",

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

author = "F. Krennrich and Badran, \{H. M.\} and Bond, \{I. H.\} and Bradbury, \{S. M.\} and Buckley, \{J. H.\} and Carter-Lewis, \{D. A.\} and M. Catanese and W. Cui and S. Dunlea and D. Das and \{De La Calle Perez\}, I. and Fegan, \{D. J.\} and Fegan, \{S. J.\} and Finley, \{J. P.\} and Gaidos, \{J. A.\} and K. Gibbs and Gillanders, \{G. H.\} and Hall, \{T. A.\} and Hillas, \{A. M.\} and J. Holder and D. Horan and M. Jordan and M. Kertzman and D. Kieda and J. Kildea and J. Knapp and K. Kosack and Lang, \{M. J.\} and S. LeBohec and B. McKernan and P. Moriarty and D. M{\"u}ller and R. Ong and R. Pallassini and D. Petry and J. Quinn and Reay, \{N. W.\} and Reynolds, \{P. T.\} and Rose, \{H. J.\} and Sembroski, \{G. H.\} and R. Sidwell and N. Stanton and Swordy, \{S. P.\} and Vassiliev, \{V. V.\} and Wakely, \{S. P.\} and Weekes, \{T. C.\}",

year = "2001",

month = oct,

day = "10",

doi = "10.1086/324221",

language = "English",

volume = "560",

pages = "L45--L48",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1 PART 2",

}

Krennrich, F, Badran, HM, Bond, IH, Bradbury, SM, Buckley, JH, Carter-Lewis, DA, Catanese, M, Cui, W, Dunlea, S, Das, D, De La Calle Perez, I, Fegan, DJ, Fegan, SJ, Finley, JP, Gaidos, JA, Gibbs, K, Gillanders, GH, Hall, TA, Hillas, AM, Holder, J, Horan, D, Jordan, M, Kertzman, M, Kieda, D, Kildea, J, Knapp, J, Kosack, K, Lang, MJ, LeBohec, S, McKernan, B, Moriarty, P, Müller, D, Ong, R, Pallassini, R, Petry, D, Quinn, J, Reay, NW, Reynolds, PT, Rose, HJ, Sembroski, GH, Sidwell, R, Stanton, N, Swordy, SP, Vassiliev, VV, Wakely, SP & Weekes, TC 2001, 'Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001', Astrophysical Journal, vol. 560, no. 1 PART 2, pp. L45-L48. https://doi.org/10.1086/324221

TY - JOUR

T1 - Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001

AU - Krennrich, F.

AU - Badran, H. M.

AU - Bond, I. H.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Carter-Lewis, D. A.

AU - Catanese, M.

AU - Cui, W.

AU - Dunlea, S.

AU - Das, D.

AU - De La Calle Perez, I.

AU - Fegan, D. J.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Gaidos, J. A.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Hall, T. A.

AU - Hillas, A. M.

AU - Holder, J.

AU - Horan, D.

AU - Jordan, M.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kildea, J.

AU - Knapp, J.

AU - Kosack, K.

AU - Lang, M. J.

AU - LeBohec, S.

AU - McKernan, B.

AU - Moriarty, P.

AU - Müller, D.

AU - Ong, R.

AU - Pallassini, R.

AU - Petry, D.

AU - Quinn, J.

AU - Reay, N. W.

AU - Reynolds, P. T.

AU - Rose, H. J.

AU - Sembroski, G. H.

AU - Sidwell, R.

AU - Stanton, N.

AU - Swordy, S. P.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Weekes, T. C.

PY - 2001/10/10

Y1 - 2001/10/10

N2 - Exceptionally strong and long-lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal-to-noise ratio of the data, we derive the energy spectrum between 260 GeV and 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead, the data can be described by a power law with exponential cutoff: dN/dE ∝ E-2.14 ± 0.03state-E/E0 m-2 s-1 TeV-1 with E0 = 4.3 ± 0.3stat TeV. Mrk 421 is the second γ-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV.

AB - Exceptionally strong and long-lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal-to-noise ratio of the data, we derive the energy spectrum between 260 GeV and 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead, the data can be described by a power law with exponential cutoff: dN/dE ∝ E-2.14 ± 0.03state-E/E0 m-2 s-1 TeV-1 with E0 = 4.3 ± 0.3stat TeV. Mrk 421 is the second γ-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV.

KW - BL Lacertae objects: individual (Markarian 421)

KW - Gamma rays: observations

U2 - 10.1086/324221

DO - 10.1086/324221

M3 - Article

AN - SCOPUS:0035841121

SN - 0004-637X

VL - 560

SP - L45-L48

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001

Abstract

Keywords

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