Gamma-ray variability of the BL lacertae object Markarian 421

J. H. Buckley; C. W. Akerlof; S. Biller; D. A. Carter-Lewis; M. Catanese; M. F. Cawley; V. Connaughton; D. J. Fegan; J. P. Finley; J. Gaidos; A. M. Hillas; J. F. Kartje; A. Königl; F. Krennrich; R. C. Lamb; R. Lessard; D. J. Macomb; J. R. Mattox; J. E. McEnery; G. Mohanty; J. Quinn; A. J. Rodgers; H. J. Rose; M. S. Schubnel; G. L. Sembroski; P. S. Smith; T. C. Weekes; C. Wilson; J. Zweerink

doi:10.1086/310352

Gamma-ray variability of the BL lacertae object Markarian 421

J. H. Buckley
, C. W. Akerlof
, S. Biller
, D. A. Carter-Lewis
, M. Catanese
, M. F. Cawley
, V. Connaughton
, D. J. Fegan
, J. P. Finley
, J. Gaidos
, A. M. Hillas
, J. F. Kartje
, A. Königl
, F. Krennrich
, R. C. Lamb
, R. Lessard
, D. J. Macomb
, J. R. Mattox
, J. E. McEnery
, G. Mohanty

J. Quinn, A. J. Rodgers, H. J. Rose, M. S. Schubnel, G. L. Sembroski, P. S. Smith, T. C. Weekes, C. Wilson, J. Zweerink

Department of Physics

Research output: Contribution to journal › Article › peer-review

123 Scopus citations

Abstract

We report on the γ-ray variability of Mrk 421 at E_γ > 300 GeV during the 1995 season, and concentrate on the results of an intense multiwavelength observing campaign in the period April 20 to May 5, which included >100 MeV γ-ray, X-ray, extreme-ultraviolet, optical, and radio observations, some of which show evidence for correlated behavior. Rapid variations in the TeV γ-ray light curve with doubling and decay times of ≲1 day require a compact emission region and significant Doppler boosting. The TeV data reveal that the γ-ray emission is best characterized by a succession of rapid flares with a relatively low baseline level of steady emission.

Original language	English
Pages (from-to)	L9-L12
Journal	Astrophysical Journal
Volume	472
Issue number	1 PART II
DOIs	https://doi.org/10.1086/310352
State	Published - 1996

Keywords

BL Lacertae objects: individual (Markarian 421)
Gamma rays: observations

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10.1086/310352

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Buckley, J. H., Akerlof, C. W., Biller, S., Carter-Lewis, D. A., Catanese, M., Cawley, M. F., Connaughton, V., Fegan, D. J., Finley, J. P., Gaidos, J., Hillas, A. M., Kartje, J. F., Königl, A., Krennrich, F., Lamb, R. C., Lessard, R., Macomb, D. J., Mattox, J. R., McEnery, J. E., ... Zweerink, J. (1996). Gamma-ray variability of the BL lacertae object Markarian 421. Astrophysical Journal, 472(1 PART II), L9-L12. https://doi.org/10.1086/310352

@article{f8733c0ca39847139e9c9a8d7df2b095,

title = "Gamma-ray variability of the BL lacertae object Markarian 421",

abstract = "We report on the γ-ray variability of Mrk 421 at Eγ > 300 GeV during the 1995 season, and concentrate on the results of an intense multiwavelength observing campaign in the period April 20 to May 5, which included >100 MeV γ-ray, X-ray, extreme-ultraviolet, optical, and radio observations, some of which show evidence for correlated behavior. Rapid variations in the TeV γ-ray light curve with doubling and decay times of ≲1 day require a compact emission region and significant Doppler boosting. The TeV data reveal that the γ-ray emission is best characterized by a succession of rapid flares with a relatively low baseline level of steady emission.",

keywords = "BL Lacertae objects: individual (Markarian 421), Gamma rays: observations",

author = "Buckley, \{J. H.\} and Akerlof, \{C. W.\} and S. Biller and Carter-Lewis, \{D. A.\} and M. Catanese and Cawley, \{M. F.\} and V. Connaughton and Fegan, \{D. J.\} and Finley, \{J. P.\} and J. Gaidos and Hillas, \{A. M.\} and Kartje, \{J. F.\} and A. K{\"o}nigl and F. Krennrich and Lamb, \{R. C.\} and R. Lessard and Macomb, \{D. J.\} and Mattox, \{J. R.\} and McEnery, \{J. E.\} and G. Mohanty and J. Quinn and Rodgers, \{A. J.\} and Rose, \{H. J.\} and Schubnel, \{M. S.\} and Sembroski, \{G. L.\} and Smith, \{P. S.\} and Weekes, \{T. C.\} and C. Wilson and J. Zweerink",

year = "1996",

doi = "10.1086/310352",

language = "English",

volume = "472",

pages = "L9--L12",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1 PART II",

}

Buckley, JH, Akerlof, CW, Biller, S, Carter-Lewis, DA, Catanese, M, Cawley, MF, Connaughton, V, Fegan, DJ, Finley, JP, Gaidos, J, Hillas, AM, Kartje, JF, Königl, A, Krennrich, F, Lamb, RC, Lessard, R, Macomb, DJ, Mattox, JR, McEnery, JE, Mohanty, G, Quinn, J, Rodgers, AJ, Rose, HJ, Schubnel, MS, Sembroski, GL, Smith, PS, Weekes, TC, Wilson, C & Zweerink, J 1996, 'Gamma-ray variability of the BL lacertae object Markarian 421', Astrophysical Journal, vol. 472, no. 1 PART II, pp. L9-L12. https://doi.org/10.1086/310352

TY - JOUR

T1 - Gamma-ray variability of the BL lacertae object Markarian 421

AU - Buckley, J. H.

AU - Akerlof, C. W.

AU - Biller, S.

AU - Carter-Lewis, D. A.

AU - Catanese, M.

AU - Cawley, M. F.

AU - Connaughton, V.

AU - Fegan, D. J.

AU - Finley, J. P.

AU - Gaidos, J.

AU - Hillas, A. M.

AU - Kartje, J. F.

AU - Königl, A.

AU - Krennrich, F.

AU - Lamb, R. C.

AU - Lessard, R.

AU - Macomb, D. J.

AU - Mattox, J. R.

AU - McEnery, J. E.

AU - Mohanty, G.

AU - Quinn, J.

AU - Rodgers, A. J.

AU - Rose, H. J.

AU - Schubnel, M. S.

AU - Sembroski, G. L.

AU - Smith, P. S.

AU - Weekes, T. C.

AU - Wilson, C.

AU - Zweerink, J.

PY - 1996

Y1 - 1996

N2 - We report on the γ-ray variability of Mrk 421 at Eγ > 300 GeV during the 1995 season, and concentrate on the results of an intense multiwavelength observing campaign in the period April 20 to May 5, which included >100 MeV γ-ray, X-ray, extreme-ultraviolet, optical, and radio observations, some of which show evidence for correlated behavior. Rapid variations in the TeV γ-ray light curve with doubling and decay times of ≲1 day require a compact emission region and significant Doppler boosting. The TeV data reveal that the γ-ray emission is best characterized by a succession of rapid flares with a relatively low baseline level of steady emission.

AB - We report on the γ-ray variability of Mrk 421 at Eγ > 300 GeV during the 1995 season, and concentrate on the results of an intense multiwavelength observing campaign in the period April 20 to May 5, which included >100 MeV γ-ray, X-ray, extreme-ultraviolet, optical, and radio observations, some of which show evidence for correlated behavior. Rapid variations in the TeV γ-ray light curve with doubling and decay times of ≲1 day require a compact emission region and significant Doppler boosting. The TeV data reveal that the γ-ray emission is best characterized by a succession of rapid flares with a relatively low baseline level of steady emission.

KW - BL Lacertae objects: individual (Markarian 421)

KW - Gamma rays: observations

UR - https://www.scopus.com/pages/publications/21444456073

U2 - 10.1086/310352

DO - 10.1086/310352

M3 - Article

AN - SCOPUS:21444456073

SN - 0004-637X

VL - 472

SP - L9-L12

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART II

ER -

Gamma-ray variability of the BL lacertae object Markarian 421

Abstract

Keywords

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