Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies

D. Horan; H. M. Badran; I. H. Bond; S. M. Bradbury; J. H. Buckley; M. J. Carson; D. A. Carter-Lewis; M. Catanese; W. Cui; S. Dunlea; D. Das; I. De La Calle Perez; M. D'Vali; 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; M. Jordan; M. Kertzman; D. Kieda; J. Kildea; J. Knapp; K. Kosack; P. Krennrich; M. J. Lang; S. Lebohec; R. Lessard; J. Lloyd-Evans; B. McKernan; P. Moriarty; D. Muller; 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:10.1086/340019

Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies

D. Horan
, H. M. Badran
, I. H. Bond
, S. M. Bradbury
, J. H. Buckley
, M. J. Carson
, D. A. Carter-Lewis
, M. Catanese
, W. Cui
, S. Dunlea
, D. Das
, I. De La Calle Perez
, M. D'Vali
, 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, M. Jordan, M. Kertzman, D. Kieda, J. Kildea, J. Knapp, K. Kosack, P. Krennrich, M. J. Lang, S. Lebohec, R. Lessard, J. Lloyd-Evans, B. McKernan, P. Moriarty, D. Muller, 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

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Abstract

A very high energy γ-ray signal has been detected at the 5.5 σ level from H1426+428, an X-ray-selected BL Lacertae object at a redshift of 0.129. The object was monitored from 1995 to 1998 with the Whipple 10 m imaging atmospheric Cerenkov telescope as part of a general blazar survey; the results of these observations, although not statistically significant, were consistently positive. X-ray observations of H1426+428 during 1999 with the BeppoSAX instrument revealed that the peak of its synchrotron spectrum occurs at greater than 100 keV, leading to the prediction of observable TeV emission from this object. H1426+428 was monitored extensively at the Whipple Observatory during the 1999, 2000, and 2001 observing seasons. The strongest TeV signals were detected in 2000 and 2001. During 2001, an integral flux of 2.04 ± 0.35 × 10^-11 cm^-2 s^-1 above 280 GeV was recorded from H1426+428. The detection of H1426+428 supports the idea that, as also seen in Mrk 501 and 1ES 2344+514, BL Lacertae objects with extremely high synchrotron peak frequencies produce γ-rays in the TeV range.

Original language	English
Pages (from-to)	753-762
Number of pages	10
Journal	Astrophysical Journal
Volume	571
Issue number	2 I
DOIs	https://doi.org/10.1086/340019
Publication status	Published - 1 Jun 2002
Externally published	Yes

Keywords

Gamma rays: observations

Access to Document

10.1086/340019

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Horan, D., Badran, H. M., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carson, M. J., Carter-Lewis, D. A., Catanese, M., Cui, W., Dunlea, S., Das, D., De La Calle Perez, I., D'Vali, M., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gillanders, G. H., ... Weekes, T. C. (2002). Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies. Astrophysical Journal, 571(2 I), 753-762. https://doi.org/10.1086/340019

@article{149e955c83644eec92bb913bac46ff24,

title = "Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies",

abstract = "A very high energy γ-ray signal has been detected at the 5.5 σ level from H1426+428, an X-ray-selected BL Lacertae object at a redshift of 0.129. The object was monitored from 1995 to 1998 with the Whipple 10 m imaging atmospheric Cerenkov telescope as part of a general blazar survey; the results of these observations, although not statistically significant, were consistently positive. X-ray observations of H1426+428 during 1999 with the BeppoSAX instrument revealed that the peak of its synchrotron spectrum occurs at greater than 100 keV, leading to the prediction of observable TeV emission from this object. H1426+428 was monitored extensively at the Whipple Observatory during the 1999, 2000, and 2001 observing seasons. The strongest TeV signals were detected in 2000 and 2001. During 2001, an integral flux of 2.04 ± 0.35 × 10-11 cm-2 s-1 above 280 GeV was recorded from H1426+428. The detection of H1426+428 supports the idea that, as also seen in Mrk 501 and 1ES 2344+514, BL Lacertae objects with extremely high synchrotron peak frequencies produce γ-rays in the TeV range.",

keywords = "Gamma rays: observations",

author = "D. Horan and Badran, \{H. M.\} and Bond, \{I. H.\} and Bradbury, \{S. M.\} and Buckley, \{J. H.\} and Carson, \{M. J.\} and Carter-Lewis, \{D. A.\} and M. Catanese and W. Cui and S. Dunlea and D. Das and \{De La Calle Perez\}, I. and M. D'Vali 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 M. Jordan and M. Kertzman and D. Kieda and J. Kildea and J. Knapp and K. Kosack and P. Krennrich and Lang, \{M. J.\} and S. Lebohec and R. Lessard and J. Lloyd-Evans and B. McKernan and P. Moriarty and D. Muller 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 = "2002",

month = jun,

day = "1",

doi = "10.1086/340019",

language = "English",

volume = "571",

pages = "753--762",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2 I",

}

Horan, D, Badran, HM, Bond, IH, Bradbury, SM, Buckley, JH, Carson, MJ, Carter-Lewis, DA, Catanese, M, Cui, W, Dunlea, S, Das, D, De La Calle Perez, I, D'Vali, M, Fegan, DJ, Fegan, SJ, Finley, JP, Gaidos, JA, Gibbs, K, Gillanders, GH, Hall, TA, Hillas, AM, Holder, J, Jordan, M, Kertzman, M, Kieda, D, Kildea, J, Knapp, J, Kosack, K, Krennrich, P, Lang, MJ, Lebohec, S, Lessard, R, Lloyd-Evans, J, McKernan, B, Moriarty, P, Muller, 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 2002, 'Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies', Astrophysical Journal, vol. 571, no. 2 I, pp. 753-762. https://doi.org/10.1086/340019

TY - JOUR

T1 - Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies

AU - Horan, D.

AU - Badran, H. M.

AU - Bond, I. H.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Carson, M. J.

AU - Carter-Lewis, D. A.

AU - Catanese, M.

AU - Cui, W.

AU - Dunlea, S.

AU - Das, D.

AU - De La Calle Perez, I.

AU - D'Vali, M.

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 - Jordan, M.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kildea, J.

AU - Knapp, J.

AU - Kosack, K.

AU - Krennrich, P.

AU - Lang, M. J.

AU - Lebohec, S.

AU - Lessard, R.

AU - Lloyd-Evans, J.

AU - McKernan, B.

AU - Moriarty, P.

AU - Muller, 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 - 2002/6/1

Y1 - 2002/6/1

N2 - A very high energy γ-ray signal has been detected at the 5.5 σ level from H1426+428, an X-ray-selected BL Lacertae object at a redshift of 0.129. The object was monitored from 1995 to 1998 with the Whipple 10 m imaging atmospheric Cerenkov telescope as part of a general blazar survey; the results of these observations, although not statistically significant, were consistently positive. X-ray observations of H1426+428 during 1999 with the BeppoSAX instrument revealed that the peak of its synchrotron spectrum occurs at greater than 100 keV, leading to the prediction of observable TeV emission from this object. H1426+428 was monitored extensively at the Whipple Observatory during the 1999, 2000, and 2001 observing seasons. The strongest TeV signals were detected in 2000 and 2001. During 2001, an integral flux of 2.04 ± 0.35 × 10-11 cm-2 s-1 above 280 GeV was recorded from H1426+428. The detection of H1426+428 supports the idea that, as also seen in Mrk 501 and 1ES 2344+514, BL Lacertae objects with extremely high synchrotron peak frequencies produce γ-rays in the TeV range.

AB - A very high energy γ-ray signal has been detected at the 5.5 σ level from H1426+428, an X-ray-selected BL Lacertae object at a redshift of 0.129. The object was monitored from 1995 to 1998 with the Whipple 10 m imaging atmospheric Cerenkov telescope as part of a general blazar survey; the results of these observations, although not statistically significant, were consistently positive. X-ray observations of H1426+428 during 1999 with the BeppoSAX instrument revealed that the peak of its synchrotron spectrum occurs at greater than 100 keV, leading to the prediction of observable TeV emission from this object. H1426+428 was monitored extensively at the Whipple Observatory during the 1999, 2000, and 2001 observing seasons. The strongest TeV signals were detected in 2000 and 2001. During 2001, an integral flux of 2.04 ± 0.35 × 10-11 cm-2 s-1 above 280 GeV was recorded from H1426+428. The detection of H1426+428 supports the idea that, as also seen in Mrk 501 and 1ES 2344+514, BL Lacertae objects with extremely high synchrotron peak frequencies produce γ-rays in the TeV range.

KW - Gamma rays: observations

U2 - 10.1086/340019

DO - 10.1086/340019

M3 - Article

AN - SCOPUS:0001228755

SN - 0004-637X

VL - 571

SP - 753

EP - 762

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

Detection of the BL Lacertae object H1426+428 at TeV gamma-ray energies

Abstract

Keywords

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