Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS

V. A. Acciari; E. Aliu; T. Arlen; T. Aune; M. Bautista; M. Beilicke; W. Benbow; S. M. Bradbury; J. H. Buckley; V. Bugaev; Y. Butt; K. Byrum; A. Cannon; O. Celik; A. Cesarini; Y. C. Chow; L. Ciupik; P. Cogan; P. Colin; W. Cui; M. K. Daniel; R. Dickherber; C. Duke; V. V. Dwarkadas; T. Ergin; S. J. Fegan; J. P. Finley; G. Finnegan; P. Fortin; L. Fortson; A. Furniss; D. Gall; K. Gibbs; G. H. Gillanders; S. Godambe; J. Grube; R. Guenette; G. Gyuk; D. Hanna; E. Hays; J. Holder; D. Horan; C. M. Hui; T. B. Humensky; A. Imran; P. Kaaret; N. Karlsson; M. Kertzman; D. Kieda; J. Kildea; A. Konopelko; H. Krawczynski; F. Krennrich; M. J. Lang; S. LeBohec; G. Maier; A. McCann; M. McCutcheon; J. Millis; P. Moriarty; R. A. Ong; A. N. Otte; D. Pandel; J. S. Perkins; M. Pohl; J. Quinn; K. Ragan; L. C. Reyes; P. T. Reynolds; E. Roache; H. J. Rose; M. Schroedter; G. H. Sembroski; A. W. Smith; D. Steele; S. P. Swordy; M. Theiling; J. A. Toner; L. Valcarcel; 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

doi:10.1088/0004-637X/698/2/L133

Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS

V. A. Acciari, E. Aliu, T. Arlen, T. Aune, M. Bautista, M. Beilicke, W. Benbow, S. M. Bradbury, J. H. Buckley, V. Bugaev, Y. Butt, K. Byrum, A. Cannon, O. Celik, A. Cesarini, Y. C. Chow, L. Ciupik, P. Cogan, P. Colin, W. CuiM. K. Daniel, R. Dickherber, C. Duke, V. V. Dwarkadas, T. Ergin, S. J. Fegan, J. P. Finley, G. Finnegan, P. Fortin, L. Fortson, A. Furniss, D. Gall, K. Gibbs, G. H. Gillanders, S. Godambe, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, C. M. Hui, T. B. Humensky, A. Imran, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. LeBohec, G. Maier, A. McCann, M. McCutcheon, J. Millis, P. Moriarty, R. A. Ong, A. N. Otte, D. Pandel, J. S. Perkins, M. Pohl, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, M. Schroedter, G. H. Sembroski, A. W. Smith, D. Steele, S. P. Swordy, M. Theiling, J. A. Toner, L. Valcarcel, 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

Physics and Astronomy (Twin Cities)

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Abstract

We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (σ) before trials and 7.5σ after trials in a point-source search. The emission is centered at 6^h16^m51^s+22°30'11'' (J2000) ±0°.03_stat±0°.08_sys, with an intrinsic extension of 0°.16 ± 0°.03_stat ± 0°.04_sys. The VHE spectrum is well fit by a power law (dN/dE = N₀ × (E/TeV)^-Γ) with a photon index of 2.99 ± 0.38_stat ± 0.3_sys and an integral flux above 300 GeV of (4.63 ± 0.90_stat ± 0.93_sys) x 10^-12 cm^-2 s^-1. These results are discussed in the context of existing models for gamma-ray production in IC 443.

Original language	English (US)
Pages (from-to)	L133-L137
Journal	Astrophysical Journal
Volume	698
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/698/2/L133
State	Published - Jun 20 2009

Keywords

Gamma rays: observations

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Acciari, V. A., Aliu, E., Arlen, T., Aune, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Colin, P., ... Zitzer, B. (2009). Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS. Astrophysical Journal, 698(2), L133-L137. https://doi.org/10.1088/0004-637X/698/2/L133

Acciari, VA, Aliu, E, Arlen, T, Aune, T, Bautista, M, Beilicke, M, Benbow, W, Bradbury, SM, Buckley, JH, Bugaev, V, Butt, Y, Byrum, K, Cannon, A, Celik, O, Cesarini, A, Chow, YC, Ciupik, L, Cogan, P, Colin, P, Cui, W, Daniel, MK, Dickherber, R, Duke, C, Dwarkadas, VV, Ergin, T, Fegan, SJ, Finley, JP, Finnegan, G, Fortin, P, Fortson, L, Furniss, A, Gall, D, Gibbs, K, Gillanders, GH, Godambe, S, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Hays, E, Holder, J, Horan, D, Hui, CM, Humensky, TB, Imran, A, Kaaret, P, Karlsson, N, Kertzman, M, Kieda, D, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, LeBohec, S, Maier, G, McCann, A, McCutcheon, M, Millis, J, Moriarty, P, Ong, RA, Otte, AN, Pandel, D, Perkins, JS, Pohl, M, Quinn, J, Ragan, K, Reyes, LC, Reynolds, PT, Roache, E, Rose, HJ, Schroedter, M, Sembroski, GH, Smith, AW, Steele, D, Swordy, SP, Theiling, M, Toner, JA, Valcarcel, L, 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 2009, 'Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS', Astrophysical Journal, vol. 698, no. 2, pp. L133-L137. https://doi.org/10.1088/0004-637X/698/2/L133

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title = "Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS",

abstract = "We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (σ) before trials and 7.5σ after trials in a point-source search. The emission is centered at 6h16m51s+22°30'11'' (J2000) ±0°.03stat±0°.08sys, with an intrinsic extension of 0°.16 ± 0°.03stat ± 0°.04sys. The VHE spectrum is well fit by a power law (dN/dE = N0 × (E/TeV)-Γ) with a photon index of 2.99 ± 0.38stat ± 0.3sys and an integral flux above 300 GeV of (4.63 ± 0.90stat ± 0.93sys) x 10-12 cm-2 s-1. These results are discussed in the context of existing models for gamma-ray production in IC 443.",

keywords = "Gamma rays: observations",

author = "Acciari, {V. A.} and E. Aliu and T. Arlen and T. Aune and M. Bautista and M. Beilicke and W. Benbow and Bradbury, {S. M.} and Buckley, {J. H.} and V. Bugaev and Y. Butt and K. Byrum and A. Cannon and O. Celik and A. Cesarini and Chow, {Y. C.} and L. Ciupik and P. Cogan and P. Colin and W. Cui and Daniel, {M. K.} and R. Dickherber and C. Duke and Dwarkadas, {V. V.} and T. Ergin and Fegan, {S. J.} and Finley, {J. P.} and G. Finnegan and P. Fortin and L. Fortson and A. Furniss and D. Gall and K. Gibbs and Gillanders, {G. H.} and S. Godambe and J. Grube and R. Guenette and G. Gyuk and D. Hanna and E. Hays and J. Holder and D. Horan and Hui, {C. M.} and Humensky, {T. B.} and A. Imran and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and J. Kildea and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, {M. J.} and S. LeBohec and G. Maier and A. McCann and M. McCutcheon and J. Millis and P. Moriarty and Ong, {R. A.} and Otte, {A. N.} and D. Pandel and Perkins, {J. S.} 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 M. Schroedter and Sembroski, {G. H.} and Smith, {A. W.} and D. Steele and Swordy, {S. P.} and M. Theiling and Toner, {J. A.} and L. Valcarcel 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",

year = "2009",

month = jun,

day = "20",

doi = "10.1088/0004-637X/698/2/L133",

language = "English (US)",

volume = "698",

pages = "L133--L137",

journal = "Astrophysical Journal",

issn = "0004-637X",

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TY - JOUR

T1 - Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS

AU - Acciari, V. A.

AU - Aliu, E.

AU - Arlen, T.

AU - Aune, T.

AU - Bautista, M.

AU - Beilicke, M.

AU - Benbow, W.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Butt, Y.

AU - Byrum, K.

AU - Cannon, A.

AU - Celik, O.

AU - Cesarini, A.

AU - Chow, Y. C.

AU - Ciupik, L.

AU - Cogan, P.

AU - Colin, P.

AU - Cui, W.

AU - Daniel, M. K.

AU - Dickherber, R.

AU - Duke, C.

AU - Dwarkadas, V. V.

AU - Ergin, T.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Finnegan, G.

AU - Fortin, P.

AU - Fortson, L.

AU - Furniss, A.

AU - Gall, D.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Godambe, S.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Hays, E.

AU - Holder, J.

AU - Horan, D.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Imran, A.

AU - Kaaret, P.

AU - Karlsson, N.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - LeBohec, S.

AU - Maier, G.

AU - McCann, A.

AU - McCutcheon, M.

AU - Millis, J.

AU - Moriarty, P.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Pandel, D.

AU - Perkins, J. S.

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 - Schroedter, M.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Steele, D.

AU - Swordy, S. P.

AU - Theiling, M.

AU - Toner, J. A.

AU - Valcarcel, L.

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.

PY - 2009/6/20

Y1 - 2009/6/20

N2 - We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (σ) before trials and 7.5σ after trials in a point-source search. The emission is centered at 6h16m51s+22°30'11'' (J2000) ±0°.03stat±0°.08sys, with an intrinsic extension of 0°.16 ± 0°.03stat ± 0°.04sys. The VHE spectrum is well fit by a power law (dN/dE = N0 × (E/TeV)-Γ) with a photon index of 2.99 ± 0.38stat ± 0.3sys and an integral flux above 300 GeV of (4.63 ± 0.90stat ± 0.93sys) x 10-12 cm-2 s-1. These results are discussed in the context of existing models for gamma-ray production in IC 443.

AB - We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (σ) before trials and 7.5σ after trials in a point-source search. The emission is centered at 6h16m51s+22°30'11'' (J2000) ±0°.03stat±0°.08sys, with an intrinsic extension of 0°.16 ± 0°.03stat ± 0°.04sys. The VHE spectrum is well fit by a power law (dN/dE = N0 × (E/TeV)-Γ) with a photon index of 2.99 ± 0.38stat ± 0.3sys and an integral flux above 300 GeV of (4.63 ± 0.90stat ± 0.93sys) x 10-12 cm-2 s-1. These results are discussed in the context of existing models for gamma-ray production in IC 443.

KW - Gamma rays: observations

UR - http://www.scopus.com/inward/record.url?scp=84884223751&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84884223751&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/698/2/L133

DO - 10.1088/0004-637X/698/2/L133

M3 - Article

AN - SCOPUS:84884223751

SN - 0004-637X

VL - 698

SP - L133-L137

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Observation of extended very high energy emission from the supernova remnant IC 443 with VERITAS

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