A survey of unidentified egret sources at very high energies

S. J. Fegan; H. M. Badran; I. H. Bond; P. J. Boyle; S. M. Bradbury; J. H. Buckley; D. A. Carter-Lewis; M. Catanese; O. Celik; W. Cui; M. Daniel; M. D'Vali; I. De La Calle Ferez; C. Duke; A. Falcone; D. J. Fegan; J. P. Finley; L. F. Fortson; J. A. Gaidos; S. Gammell; K. Gibbs; G. H. Gillanders; J. Grube; J. Hall; T. A. Hall; D. Hanna; A. M. Hillas; J. Holder; D. Horan; A. Jarvis; M. Jordan; G. E. Kenny; M. Kertzman; D. Kieda; J. Kildea; J. Knapp; K. Kosack; H. Krawczynski; F. Krennrich; M. J. Lang; S. Le Bohec; R. W. Lessard; E. Linton; J. Lloyd-Evans; A. Milovanovic; J. McEnery; P. Moriarty; R. Mukherjee; D. Muller; T. Nagai; S. Nolan; R. A. Ong; R. Pallassini; D. Petry; B. Power-Mooney; J. Quinn; M. Quinn; K. Ragan; P. Rebillot; P. T. Reynolds; H. J. Rose; M. Schroedter; G. H. Sembroski; S. P. Swordy; A. Svson; V. V. Vassiliev; S. P. Wakely; G. Walker; T. C. Weekes; J. Zweerink

doi:10.1086/429123

A survey of unidentified egret sources at very high energies

S. J. Fegan, H. M. Badran, I. H. Bond, P. J. Boyle, S. M. Bradbury, J. H. Buckley, D. A. Carter-Lewis, M. Catanese, O. Celik, W. Cui, M. Daniel, M. D'Vali, I. De La Calle Ferez, C. Duke, A. Falcone, D. J. Fegan, J. P. Finley, L. F. Fortson, J. A. Gaidos, S. GammellK. Gibbs, G. H. Gillanders, J. Grube, J. Hall, T. A. Hall, D. Hanna, A. M. Hillas, J. Holder, D. Horan, A. Jarvis, M. Jordan, G. E. Kenny, M. Kertzman, D. Kieda, J. Kildea, J. Knapp, K. Kosack, H. Krawczynski, F. Krennrich, M. J. Lang, S. Le Bohec, R. W. Lessard, E. Linton, J. Lloyd-Evans, A. Milovanovic, J. McEnery, P. Moriarty, R. Mukherjee, D. Muller, T. Nagai, S. Nolan, R. A. Ong, R. Pallassini, D. Petry, B. Power-Mooney, J. Quinn, M. Quinn, K. Ragan, P. Rebillot, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, S. P. Swordy, A. Svson, V. V. Vassiliev, S. P. Wakely, G. Walker, T. C. Weekes, J. Zweerink

Physics and Astronomy (Twin Cities)

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Abstract

The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 Me V and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.

Original language	English (US)
Pages (from-to)	638-655
Number of pages	18
Journal	Astrophysical Journal
Volume	624
Issue number	2 I
DOIs	https://doi.org/10.1086/429123
State	Published - May 10 2005

Keywords

Galaxies: jets
Gamma rays: observations
Surveys

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Fegan, S. J., Badran, H. M., Bond, I. H., Boyle, P. J., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Catanese, M., Celik, O., Cui, W., Daniel, M., D'Vali, M., De La Calle Ferez, I., Duke, C., Falcone, A., Fegan, D. J., Finley, J. P., Fortson, L. F., Gaidos, J. A., ... Zweerink, J. (2005). A survey of unidentified egret sources at very high energies. Astrophysical Journal, 624(2 I), 638-655. https://doi.org/10.1086/429123

Fegan, SJ, Badran, HM, Bond, IH, Boyle, PJ, Bradbury, SM, Buckley, JH, Carter-Lewis, DA, Catanese, M, Celik, O, Cui, W, Daniel, M, D'Vali, M, De La Calle Ferez, I, Duke, C, Falcone, A, Fegan, DJ, Finley, JP, Fortson, LF, Gaidos, JA, Gammell, S, Gibbs, K, Gillanders, GH, Grube, J, Hall, J, Hall, TA, Hanna, D, Hillas, AM, Holder, J, Horan, D, Jarvis, A, Jordan, M, Kenny, GE, Kertzman, M, Kieda, D, Kildea, J, Knapp, J, Kosack, K, Krawczynski, H, Krennrich, F, Lang, MJ, Le Bohec, S, Lessard, RW, Linton, E, Lloyd-Evans, J, Milovanovic, A, McEnery, J, Moriarty, P, Mukherjee, R, Muller, D, Nagai, T, Nolan, S, Ong, RA, Pallassini, R, Petry, D, Power-Mooney, B, Quinn, J, Quinn, M, Ragan, K, Rebillot, P, Reynolds, PT, Rose, HJ, Schroedter, M, Sembroski, GH, Swordy, SP, Svson, A, Vassiliev, VV, Wakely, SP, Walker, G, Weekes, TC & Zweerink, J 2005, 'A survey of unidentified egret sources at very high energies', Astrophysical Journal, vol. 624, no. 2 I, pp. 638-655. https://doi.org/10.1086/429123

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title = "A survey of unidentified egret sources at very high energies",

abstract = "The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 Me V and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.",

keywords = "Galaxies: jets, Gamma rays: observations, Surveys",

author = "Fegan, {S. J.} and Badran, {H. M.} and Bond, {I. H.} and Boyle, {P. J.} and Bradbury, {S. M.} and Buckley, {J. H.} and Carter-Lewis, {D. A.} and M. Catanese and O. Celik and W. Cui and M. Daniel and M. D'Vali and {De La Calle Ferez}, I. and C. Duke and A. Falcone and Fegan, {D. J.} and Finley, {J. P.} and Fortson, {L. F.} and Gaidos, {J. A.} and S. Gammell and K. Gibbs and Gillanders, {G. H.} and J. Grube and J. Hall and Hall, {T. A.} and D. Hanna and Hillas, {A. M.} and J. Holder and D. Horan and A. Jarvis and M. Jordan and Kenny, {G. E.} and M. Kertzman and D. Kieda and J. Kildea and J. Knapp and K. Kosack and H. Krawczynski and F. Krennrich and Lang, {M. J.} and {Le Bohec}, S. and Lessard, {R. W.} and E. Linton and J. Lloyd-Evans and A. Milovanovic and J. McEnery and P. Moriarty and R. Mukherjee and D. Muller and T. Nagai and S. Nolan and Ong, {R. A.} and R. Pallassini and D. Petry and B. Power-Mooney and J. Quinn and M. Quinn and K. Ragan and P. Rebillot and Reynolds, {P. T.} and Rose, {H. J.} and M. Schroedter and Sembroski, {G. H.} and Swordy, {S. P.} and A. Svson and Vassiliev, {V. V.} and Wakely, {S. P.} and G. Walker and Weekes, {T. C.} and J. Zweerink",

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AU - Fegan, S. J.

AU - Badran, H. M.

AU - Bond, I. H.

AU - Boyle, P. J.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Carter-Lewis, D. A.

AU - Catanese, M.

AU - Celik, O.

AU - Cui, W.

AU - Daniel, M.

AU - D'Vali, M.

AU - De La Calle Ferez, I.

AU - Duke, C.

AU - Falcone, A.

AU - Fegan, D. J.

AU - Finley, J. P.

AU - Fortson, L. F.

AU - Gaidos, J. A.

AU - Gammell, S.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Hall, J.

AU - Hall, T. A.

AU - Hanna, D.

AU - Hillas, A. M.

AU - Holder, J.

AU - Horan, D.

AU - Jarvis, A.

AU - Jordan, M.

AU - Kenny, G. E.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kildea, J.

AU - Knapp, J.

AU - Kosack, K.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Le Bohec, S.

AU - Lessard, R. W.

AU - Linton, E.

AU - Lloyd-Evans, J.

AU - Milovanovic, A.

AU - McEnery, J.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Muller, D.

AU - Nagai, T.

AU - Nolan, S.

AU - Ong, R. A.

AU - Pallassini, R.

AU - Petry, D.

AU - Power-Mooney, B.

AU - Quinn, J.

AU - Quinn, M.

AU - Ragan, K.

AU - Rebillot, P.

AU - Reynolds, P. T.

AU - Rose, H. J.

AU - Schroedter, M.

AU - Sembroski, G. H.

AU - Swordy, S. P.

AU - Svson, A.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Walker, G.

AU - Weekes, T. C.

AU - Zweerink, J.

PY - 2005/5/10

Y1 - 2005/5/10

N2 - The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 Me V and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.

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KW - Galaxies: jets

KW - Gamma rays: observations

KW - Surveys

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U2 - 10.1086/429123

DO - 10.1086/429123

M3 - Article

AN - SCOPUS:21144462500

SN - 0004-637X

VL - 624

SP - 638

EP - 655

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

A survey of unidentified egret sources at very high energies

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