Observation of M87 at 400 GeV with the whipple 10 meter telescope

S. Le Bohec, 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 Perez, C. Duke, A. Falcone, D. J. Fegan, S. J. Fegan, J. P. Finley, L. F. Fortson, J. A. GaidosS. 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, E. Linton, J. Lloyd-Evans, A. Milovanovic, P. Moriarty, D. Müller, 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. Syson, V. V. Vassiliev, S. P. Wakely, G. Walker, T. C. Weekes, J. Zweerink

Research output: Contribution to journalArticle

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Abstract

We present results from observations taken with the Whipple 10 m very high energy γ-ray telescope with maximal sensitivity at 400 GeV during 39 hr between 2000 and 2003 in the direction of the giant radio galaxy M87. Using the entire data set, we derive a 99% confidence level upper limit on the flux of γ-ray emission above 400 GeV from M87 to be ≤6.9 × 10 -12 cm-2 s-1. This suggests variability at the 90% confidence level when compared to the flux measured by the HEGRA collaboration in 1999 if the differential spectrum is steeper than a power law of index 3.75. Our search for a correlation between the Rossi X-Ray Timing Explorer all-sky monitor observation and a potential γ-ray signal is inconclusive.

Original languageEnglish (US)
Pages (from-to)156-160
Number of pages5
JournalAstrophysical Journal
Volume610
Issue number1 I
DOIs
StatePublished - Jul 20 2004

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rays
power law
telescopes
radio
confidence
energy
X Ray Timing Explorer
radio galaxies
sky
monitors
sensitivity
index

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Le Bohec, S., Badran, H. M., Bond, I. H., Boyle, P. J., Bradbury, S. M., Buckley, J. H., ... Zweerink, J. (2004). Observation of M87 at 400 GeV with the whipple 10 meter telescope. Astrophysical Journal, 610(1 I), 156-160. https://doi.org/10.1086/421697
Le Bohec, S. ; 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 Perez, I. ; Duke, C. ; Falcone, A. ; Fegan, D. J. ; Fegan, S. J. ; Finley, J. P. ; Fortson, L. F. ; Gaidos, J. A. ; Gammell, S. ; Gibbs, K. ; Gillanders, G. H. ; Grube, J. ; Hall, J. ; Hall, T. A. ; Hanna, D. ; Hillas, A. M. ; Holder, J. ; Horan, D. ; Jarvis, A. ; Jordan, M. ; Kenny, G. E. ; Kertzman, M. ; Kieda, D. ; Kildea, J. ; Knapp, J. ; Kosack, K. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Linton, E. ; Lloyd-Evans, J. ; Milovanovic, A. ; Moriarty, P. ; Müller, D. ; Nagai, T. ; Nolan, S. ; Ong, R. A. ; Pallassini, R. ; Petry, D. ; Power-Mooney, B. ; Quinn, J. ; Quinn, M. ; Ragan, K. ; Rebillot, P. ; Reynolds, P. T. ; Rose, H. J. ; Schroedter, M. ; Sembroski, G. H. ; Swordy, S. P. ; Syson, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Walker, G. ; Weekes, T. C. ; Zweerink, J. / Observation of M87 at 400 GeV with the whipple 10 meter telescope. In: Astrophysical Journal. 2004 ; Vol. 610, No. 1 I. pp. 156-160.
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abstract = "We present results from observations taken with the Whipple 10 m very high energy γ-ray telescope with maximal sensitivity at 400 GeV during 39 hr between 2000 and 2003 in the direction of the giant radio galaxy M87. Using the entire data set, we derive a 99{\%} confidence level upper limit on the flux of γ-ray emission above 400 GeV from M87 to be ≤6.9 × 10 -12 cm-2 s-1. This suggests variability at the 90{\%} confidence level when compared to the flux measured by the HEGRA collaboration in 1999 if the differential spectrum is steeper than a power law of index 3.75. Our search for a correlation between the Rossi X-Ray Timing Explorer all-sky monitor observation and a potential γ-ray signal is inconclusive.",
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Le Bohec, S, 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 Perez, I, Duke, C, Falcone, A, Fegan, DJ, Fegan, SJ, 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, Linton, E, Lloyd-Evans, J, Milovanovic, A, Moriarty, P, Müller, 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, Syson, A, Vassiliev, VV, Wakely, SP, Walker, G, Weekes, TC & Zweerink, J 2004, 'Observation of M87 at 400 GeV with the whipple 10 meter telescope', Astrophysical Journal, vol. 610, no. 1 I, pp. 156-160. https://doi.org/10.1086/421697

Observation of M87 at 400 GeV with the whipple 10 meter telescope. / Le Bohec, S.; 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 Perez, I.; Duke, C.; Falcone, A.; Fegan, D. J.; Fegan, S. J.; Finley, J. P.; Fortson, L. F.; Gaidos, J. A.; Gammell, S.; Gibbs, K.; Gillanders, G. H.; Grube, J.; Hall, J.; Hall, T. A.; Hanna, D.; Hillas, A. M.; Holder, J.; Horan, D.; Jarvis, A.; Jordan, M.; Kenny, G. E.; Kertzman, M.; Kieda, D.; Kildea, J.; Knapp, J.; Kosack, K.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; Linton, E.; Lloyd-Evans, J.; Milovanovic, A.; Moriarty, P.; Müller, D.; Nagai, T.; Nolan, S.; Ong, R. A.; Pallassini, R.; Petry, D.; Power-Mooney, B.; Quinn, J.; Quinn, M.; Ragan, K.; Rebillot, P.; Reynolds, P. T.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; Swordy, S. P.; Syson, A.; Vassiliev, V. V.; Wakely, S. P.; Walker, G.; Weekes, T. C.; Zweerink, J.

In: Astrophysical Journal, Vol. 610, No. 1 I, 20.07.2004, p. 156-160.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of M87 at 400 GeV with the whipple 10 meter telescope

AU - Le Bohec, S.

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 Perez, I.

AU - Duke, C.

AU - Falcone, A.

AU - Fegan, D. J.

AU - Fegan, S. 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 - Linton, E.

AU - Lloyd-Evans, J.

AU - Milovanovic, A.

AU - Moriarty, P.

AU - Müller, 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 - Syson, A.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Walker, G.

AU - Weekes, T. C.

AU - Zweerink, J.

PY - 2004/7/20

Y1 - 2004/7/20

N2 - We present results from observations taken with the Whipple 10 m very high energy γ-ray telescope with maximal sensitivity at 400 GeV during 39 hr between 2000 and 2003 in the direction of the giant radio galaxy M87. Using the entire data set, we derive a 99% confidence level upper limit on the flux of γ-ray emission above 400 GeV from M87 to be ≤6.9 × 10 -12 cm-2 s-1. This suggests variability at the 90% confidence level when compared to the flux measured by the HEGRA collaboration in 1999 if the differential spectrum is steeper than a power law of index 3.75. Our search for a correlation between the Rossi X-Ray Timing Explorer all-sky monitor observation and a potential γ-ray signal is inconclusive.

AB - We present results from observations taken with the Whipple 10 m very high energy γ-ray telescope with maximal sensitivity at 400 GeV during 39 hr between 2000 and 2003 in the direction of the giant radio galaxy M87. Using the entire data set, we derive a 99% confidence level upper limit on the flux of γ-ray emission above 400 GeV from M87 to be ≤6.9 × 10 -12 cm-2 s-1. This suggests variability at the 90% confidence level when compared to the flux measured by the HEGRA collaboration in 1999 if the differential spectrum is steeper than a power law of index 3.75. Our search for a correlation between the Rossi X-Ray Timing Explorer all-sky monitor observation and a potential γ-ray signal is inconclusive.

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U2 - 10.1086/421697

DO - 10.1086/421697

M3 - Article

AN - SCOPUS:4444240627

VL - 610

SP - 156

EP - 160

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 I

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Le Bohec S, Badran HM, Bond IH, Boyle PJ, Bradbury SM, Buckley JH et al. Observation of M87 at 400 GeV with the whipple 10 meter telescope. Astrophysical Journal. 2004 Jul 20;610(1 I):156-160. https://doi.org/10.1086/421697