TeV and multi-wavelength observations of Mrk421 in 2006-2008

V. A. Acciari; E. Aliu; T. Arlen; T. Aune; M. Beilicke; W. Benbow; D. Boltuch; S. M. Bradbury; J. H. Buckley; V. Bugaev; K. Byrum; A. Cannon; A. Cesarini; L. Ciupik; W. Cui; R. Dickherber; C. Duke; A. Falcone; J. P. Finley; G. Finnegan; L. Fortson; A. Furniss; N. Galante; D. Gall; G. H. Gillanders; S. Godambe; J. Grube; R. Guenette; G. Gyuk; D. Hanna; J. Holder; C. M. Hui; T. B. Humensky; A. Imran; P. Kaaret; N. Karlsson; M. Kertzman; D. Kieda; A. Konopelko; H. Krawczynski; F. Krennrich; M. J. Lang; G. Maier; S. McArthur; M. McCutcheon; P. Moriarty; R. A. Ong; A. N. Otte; M. Ouellette; D. Pandel; J. S. Perkins; A. Pichel; M. Pohl; J. Quinn; K. Ragan; L. C. Reyes; P. T. Reynolds; E. Roache; H. J. Rose; A. C. Rovero; M. Schroedter; G. H. Sembroski; G. Demet Senturk; D. Steele; S. P. Swordy; M. Theiling; S. Thibadeau; A. Varlotta; V. V. Vassiliev; S. Vincent; R. G. Wagner; S. P. Wakely; J. E. Ward; T. C. Weekes; A. Weinstein; T. Weisgarber; D. A. Williams; S. Wissel; M. Wood; B. Zitzer; A. Garson; K. Lee; M. A.C. Sadun; M. M. Carini; D. Barnaby; K. Cook; J. Maune; A. Pease; S. Smith; R. Walters; M. A. Berdyugin; E. Lindfors; K. Nilsson; M. Pasanen; J. Sainio; A. Sillanpaa; L. O. Takalo; C. Villforth; M. T. Montaruli; M. Baker; M. A. Lahteenmaki; M. Tornikoski; T. Hovatta; E. Nieppola; M. H.D. Aller; M. F. Aller

doi:10.1088/0004-637X/738/1/25

TeV and multi-wavelength observations of Mrk421 in 2006-2008

V. A. Acciari, E. Aliu, T. Arlen, T. Aune, M. Beilicke, W. Benbow, D. Boltuch, S. M. Bradbury, J. H. Buckley, V. Bugaev, K. Byrum, A. Cannon, A. Cesarini, L. Ciupik, W. Cui, R. Dickherber, C. Duke, A. Falcone, J. P. Finley, G. FinneganL. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Godambe, J. Grube, R. Guenette, G. Gyuk, D. Hanna, J. Holder, C. M. Hui, T. B. Humensky, A. Imran, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, G. Maier, S. McArthur, M. McCutcheon, P. Moriarty, R. A. Ong, A. N. Otte, M. Ouellette, D. Pandel, J. S. Perkins, A. Pichel, M. Pohl, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, A. C. Rovero, M. Schroedter, G. H. Sembroski, G. Demet Senturk, D. Steele, S. P. Swordy, M. Theiling, S. Thibadeau, A. Varlotta, V. V. Vassiliev, S. Vincent, R. G. Wagner, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, T. Weisgarber, D. A. Williams, S. Wissel, M. Wood, B. Zitzer, A. Garson, K. Lee, M. A.C. Sadun, M. M. Carini, D. Barnaby, K. Cook, J. Maune, A. Pease, S. Smith, R. Walters, M. A. Berdyugin, E. Lindfors, K. Nilsson, M. Pasanen, J. Sainio, A. Sillanpaa, L. O. Takalo, C. Villforth, M. T. Montaruli, M. Baker, M. A. Lahteenmaki, M. Tornikoski, T. Hovatta, E. Nieppola, M. H.D. Aller, M. F. Aller

Biochemistry, Chemistry & Physics

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Abstract

We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model.

Original language	English
Article number	25
Journal	Astrophysical Journal
Volume	738
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/738/1/25
State	Published - Sep 1 2011

Scopus Subject Areas

Astronomy and Astrophysics
Space and Planetary Science

Keywords

BL Lacertae objects: individual (Mrk 421)
X-rays: galaxies
galaxies: jets
galaxies: nuclei
gamma rays: galaxies

Access to Document

10.1088/0004-637X/738/1/25

Cite this

Acciari, V. A., Aliu, E., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Byrum, K., Cannon, A., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Duke, C., Falcone, A., Finley, J. P., ... Aller, M. F. (2011). TeV and multi-wavelength observations of Mrk421 in 2006-2008. Astrophysical Journal, 738(1), Article 25. https://doi.org/10.1088/0004-637X/738/1/25

@article{c1ab3c315bd6436c901a1f1f6ed23ff7,

title = "TeV and multi-wavelength observations of Mrk421 in 2006-2008",

abstract = "We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model.",

keywords = "BL Lacertae objects: individual (Mrk 421), X-rays: galaxies, galaxies: jets, galaxies: nuclei, gamma rays: galaxies",

author = "Acciari, {V. A.} and E. Aliu and T. Arlen and T. Aune and M. Beilicke and W. Benbow and D. Boltuch and Bradbury, {S. M.} and Buckley, {J. H.} and V. Bugaev and K. Byrum and A. Cannon and A. Cesarini and L. Ciupik and W. Cui and R. Dickherber and C. Duke and A. Falcone and Finley, {J. P.} and G. Finnegan and L. Fortson and A. Furniss and N. Galante and D. Gall and Gillanders, {G. H.} and S. Godambe and J. Grube and R. Guenette and G. Gyuk and D. Hanna and J. Holder and Hui, {C. M.} and Humensky, {T. B.} and A. Imran and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, {M. J.} and G. Maier and S. McArthur and M. McCutcheon and P. Moriarty and Ong, {R. A.} and Otte, {A. N.} and M. Ouellette and D. Pandel and Perkins, {J. S.} and A. Pichel and M. Pohl and J. Quinn and K. Ragan and Reyes, {L. C.} and Reynolds, {P. T.} and E. Roache and Rose, {H. J.} and Rovero, {A. C.} and M. Schroedter and Sembroski, {G. H.} and {Demet Senturk}, G. and D. Steele and Swordy, {S. P.} and M. Theiling and S. Thibadeau and A. Varlotta and Vassiliev, {V. V.} and S. Vincent and Wagner, {R. G.} and Wakely, {S. P.} and Ward, {J. E.} and Weekes, {T. C.} and A. Weinstein and T. Weisgarber and Williams, {D. A.} and S. Wissel and M. Wood and B. Zitzer and A. Garson and K. Lee and Sadun, {M. A.C.} and Carini, {M. M.} and D. Barnaby and K. Cook and J. Maune and A. Pease and S. Smith and R. Walters and Berdyugin, {M. A.} and E. Lindfors and K. Nilsson and M. Pasanen and J. Sainio and A. Sillanpaa and Takalo, {L. O.} and C. Villforth and Montaruli, {M. T.} and M. Baker and Lahteenmaki, {M. A.} and M. Tornikoski and T. Hovatta and E. Nieppola and Aller, {M. H.D.} and Aller, {M. F.}",

year = "2011",

month = sep,

day = "1",

doi = "10.1088/0004-637X/738/1/25",

language = "English",

volume = "738",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Acciari, VA, Aliu, E, Arlen, T, Aune, T, Beilicke, M, Benbow, W, Boltuch, D, Bradbury, SM, Buckley, JH, Bugaev, V, Byrum, K, Cannon, A, Cesarini, A, Ciupik, L, Cui, W, Dickherber, R, Duke, C, Falcone, A, Finley, JP, Finnegan, G, Fortson, L, Furniss, A, Galante, N, Gall, D, Gillanders, GH, Godambe, S, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Holder, J, Hui, CM, Humensky, TB, Imran, A, Kaaret, P, Karlsson, N, Kertzman, M, Kieda, D, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, Maier, G, McArthur, S, McCutcheon, M, Moriarty, P, Ong, RA, Otte, AN, Ouellette, M, Pandel, D, Perkins, JS, Pichel, A, Pohl, M, Quinn, J, Ragan, K, Reyes, LC, Reynolds, PT, Roache, E, Rose, HJ, Rovero, AC, Schroedter, M, Sembroski, GH, Demet Senturk, G, Steele, D, Swordy, SP, Theiling, M, Thibadeau, S, Varlotta, A, Vassiliev, VV, Vincent, S, Wagner, RG, Wakely, SP, Ward, JE, Weekes, TC, Weinstein, A, Weisgarber, T, Williams, DA, Wissel, S, Wood, M, Zitzer, B, Garson, A, Lee, K, Sadun, MAC, Carini, MM, Barnaby, D, Cook, K, Maune, J, Pease, A, Smith, S, Walters, R, Berdyugin, MA, Lindfors, E, Nilsson, K, Pasanen, M, Sainio, J, Sillanpaa, A, Takalo, LO, Villforth, C, Montaruli, MT, Baker, M, Lahteenmaki, MA, Tornikoski, M, Hovatta, T, Nieppola, E, Aller, MHD & Aller, MF 2011, 'TeV and multi-wavelength observations of Mrk421 in 2006-2008', Astrophysical Journal, vol. 738, no. 1, 25. https://doi.org/10.1088/0004-637X/738/1/25

TY - JOUR

T1 - TeV and multi-wavelength observations of Mrk421 in 2006-2008

AU - Acciari, V. A.

AU - Aliu, E.

AU - Arlen, T.

AU - Aune, T.

AU - Beilicke, M.

AU - Benbow, W.

AU - Boltuch, D.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Byrum, K.

AU - Cannon, A.

AU - Cesarini, A.

AU - Ciupik, L.

AU - Cui, W.

AU - Dickherber, R.

AU - Duke, C.

AU - Falcone, A.

AU - Finley, J. P.

AU - Finnegan, G.

AU - Fortson, L.

AU - Furniss, A.

AU - Galante, N.

AU - Gall, D.

AU - Gillanders, G. H.

AU - Godambe, S.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Holder, J.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Imran, A.

AU - Kaaret, P.

AU - Karlsson, N.

AU - Kertzman, M.

AU - Kieda, D.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Maier, G.

AU - McArthur, S.

AU - McCutcheon, M.

AU - Moriarty, P.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Ouellette, M.

AU - Pandel, D.

AU - Perkins, J. S.

AU - Pichel, A.

AU - Pohl, M.

AU - Quinn, J.

AU - Ragan, K.

AU - Reyes, L. C.

AU - Reynolds, P. T.

AU - Roache, E.

AU - Rose, H. J.

AU - Rovero, A. C.

AU - Schroedter, M.

AU - Sembroski, G. H.

AU - Demet Senturk, G.

AU - Steele, D.

AU - Swordy, S. P.

AU - Theiling, M.

AU - Thibadeau, S.

AU - Varlotta, A.

AU - Vassiliev, V. V.

AU - Vincent, S.

AU - Wagner, R. G.

AU - Wakely, S. P.

AU - Ward, J. E.

AU - Weekes, T. C.

AU - Weinstein, A.

AU - Weisgarber, T.

AU - Williams, D. A.

AU - Wissel, S.

AU - Wood, M.

AU - Zitzer, B.

AU - Garson, A.

AU - Lee, K.

AU - Sadun, M. A.C.

AU - Carini, M. M.

AU - Barnaby, D.

AU - Cook, K.

AU - Maune, J.

AU - Pease, A.

AU - Smith, S.

AU - Walters, R.

AU - Berdyugin, M. A.

AU - Lindfors, E.

AU - Nilsson, K.

AU - Pasanen, M.

AU - Sainio, J.

AU - Sillanpaa, A.

AU - Takalo, L. O.

AU - Villforth, C.

AU - Montaruli, M. T.

AU - Baker, M.

AU - Lahteenmaki, M. A.

AU - Tornikoski, M.

AU - Hovatta, T.

AU - Nieppola, E.

AU - Aller, M. H.D.

AU - Aller, M. F.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model.

AB - We report on TeV γ-ray observations of the blazar Mrk421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10 m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV γ-ray fluxes and energy spectra with unprecedented accuracy where Mrk421 was detected in each of the pointings. A total of 47.3 hr of VERITAS and 96 hr of Whipple 10 m data were acquired between 2006 January and 2008 June. We present the results of a study of the TeV γ-ray energy spectra as a function of time and for different flux levels. On 2008 May 2 and 3, bright TeV γ-ray flares were detected with fluxes reaching the level of 10 Crab. The TeV γ-ray data were complemented with radio, optical, and X-ray observations, with flux variability found in all bands except for the radio wave band. The combination of the Rossi X-ray Timing Explorer and Swift X-ray data reveal spectral hardening with increasing flux levels, often correlated with an increase of the source activity in TeV γ-rays. Contemporaneous spectral energy distributions were generated for 18 nights, each of which are reasonably described by a one-zone synchrotron self-Compton model.

KW - BL Lacertae objects: individual (Mrk 421)

KW - X-rays: galaxies

KW - galaxies: jets

KW - galaxies: nuclei

KW - gamma rays: galaxies

UR - http://www.scopus.com/inward/record.url?scp=80052745111&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/738/1/25

DO - 10.1088/0004-637X/738/1/25

M3 - Article

AN - SCOPUS:80052745111

SN - 0004-637X

VL - 738

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 25

ER -

TeV and multi-wavelength observations of Mrk421 in 2006-2008

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