Long duration variability of mrk 421

A. J. Smith; A. A. Abdo; B. Allen; D. Berley; S. Casanova; C. Chen; D. G. Coyne; B. L. Dingus; R. W. Ellsworth; L. Fleysher; R. Fleysher; M. M. Gonzalez; J. A. Goodman; E. Hays; C. M. Hoffman; B. Hopper; P. H. Hüntemeyer; B. E. Kolterman; C. P. Lansdell; J. T. Linnemann; J. E. Mcenery; A. I. Mincer; P. Nemethy; D. Noyes; J. M. Ryan; P. M. Saz Parkinson; A. Shoup; G. Sinnis; G. W. Sullivan; V. Vasileiou; G. P. Walker; D. A. Williams; X. W. Xu; G. B. Yodh

Long duration variability of mrk 421

A. J. Smith, A. A. Abdo, B. Allen, D. Berley, S. Casanova, C. Chen, D. G. Coyne, B. L. Dingus, R. W. Ellsworth, L. Fleysher, R. Fleysher, M. M. Gonzalez, J. A. Goodman, E. Hays, C. M. Hoffman, B. Hopper, P. H. Hüntemeyer, B. E. Kolterman, C. P. Lansdell, J. T. LinnemannJ. E. Mcenery, A. I. Mincer, P. Nemethy, D. Noyes, J. M. Ryan, P. M. Saz Parkinson, A. Shoup, G. Sinnis, G. W. Sullivan, V. Vasileiou, G. P. Walker, D. A. Williams, X. W. Xu, G. B. Yodh

Research output: Contribution to conference › Paper › peer-review

Abstract

Active Galaxies such as Mrk 421 have been shown to be highly variable at all time scales. Atmospheric Cherenkov Telescopes (ACTs) have excellent instantaneous sensitivity and have observed short bright flares from Mrk 421. However, long duration variability is difficult to monitor with ACTs due to their intermittent exposure. Milagro, in contrast, monitorsMrk 421 with daily observations. While Milagro lacks the sensitivity to detect short duration flares unless they are i extremely bright, it is well suited to make long duration monitoring of the total flux of Mrk 421 on time scales from months to years. In this paper we present the long duration variability and total fluence of Mrk 421 using 6 years of data from Milagro.

Original language	English (US)
Pages	973-976
Number of pages	4
State	Published - 2007
Event	30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico Duration: Jul 3 2007 → Jul 11 2007

Other

Other	30th International Cosmic Ray Conference, ICRC 2007
Country/Territory	Mexico
City	Merida, Yucatan
Period	7/3/07 → 7/11/07

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

Smith, A. J., Abdo, A. A., Allen, B., Berley, D., Casanova, S., Chen, C., Coyne, D. G., Dingus, B. L., Ellsworth, R. W., Fleysher, L., Fleysher, R., Gonzalez, M. M., Goodman, J. A., Hays, E., Hoffman, C. M., Hopper, B., Hüntemeyer, P. H., Kolterman, B. E., Lansdell, C. P., ... Yodh, G. B. (2007). Long duration variability of mrk 421. 973-976. Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico.

Smith, AJ, Abdo, AA, Allen, B, Berley, D, Casanova, S, Chen, C, Coyne, DG, Dingus, BL, Ellsworth, RW, Fleysher, L, Fleysher, R, Gonzalez, MM, Goodman, JA, Hays, E, Hoffman, CM, Hopper, B, Hüntemeyer, PH, Kolterman, BE, Lansdell, CP, Linnemann, JT, Mcenery, JE, Mincer, AI, Nemethy, P, Noyes, D, Ryan, JM, Saz Parkinson, PM, Shoup, A, Sinnis, G, Sullivan, GW, Vasileiou, V, Walker, GP, Williams, DA, Xu, XW & Yodh, GB 2007, 'Long duration variability of mrk 421', Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico, 7/3/07 - 7/11/07 pp. 973-976.

@conference{d864bfd7be7447ac81f16699ae8c28e6,

title = "Long duration variability of mrk 421",

abstract = "Active Galaxies such as Mrk 421 have been shown to be highly variable at all time scales. Atmospheric Cherenkov Telescopes (ACTs) have excellent instantaneous sensitivity and have observed short bright flares from Mrk 421. However, long duration variability is difficult to monitor with ACTs due to their intermittent exposure. Milagro, in contrast, monitorsMrk 421 with daily observations. While Milagro lacks the sensitivity to detect short duration flares unless they are i extremely bright, it is well suited to make long duration monitoring of the total flux of Mrk 421 on time scales from months to years. In this paper we present the long duration variability and total fluence of Mrk 421 using 6 years of data from Milagro.",

author = "Smith, {A. J.} and Abdo, {A. A.} and B. Allen and D. Berley and S. Casanova and C. Chen and Coyne, {D. G.} and Dingus, {B. L.} and Ellsworth, {R. W.} and L. Fleysher and R. Fleysher and Gonzalez, {M. M.} and Goodman, {J. A.} and E. Hays and Hoffman, {C. M.} and B. Hopper and H{\"u}ntemeyer, {P. H.} and Kolterman, {B. E.} and Lansdell, {C. P.} and Linnemann, {J. T.} and Mcenery, {J. E.} and Mincer, {A. I.} and P. Nemethy and D. Noyes and Ryan, {J. M.} and {Saz Parkinson}, {P. M.} and A. Shoup and G. Sinnis and Sullivan, {G. W.} and V. Vasileiou and Walker, {G. P.} and Williams, {D. A.} and Xu, {X. W.} and Yodh, {G. B.}",

year = "2007",

language = "English (US)",

pages = "973--976",

note = "30th International Cosmic Ray Conference, ICRC 2007 ; Conference date: 03-07-2007 Through 11-07-2007",

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TY - CONF

T1 - Long duration variability of mrk 421

AU - Smith, A. J.

AU - Abdo, A. A.

AU - Allen, B.

AU - Berley, D.

AU - Casanova, S.

AU - Chen, C.

AU - Coyne, D. G.

AU - Dingus, B. L.

AU - Ellsworth, R. W.

AU - Fleysher, L.

AU - Fleysher, R.

AU - Gonzalez, M. M.

AU - Goodman, J. A.

AU - Hays, E.

AU - Hoffman, C. M.

AU - Hopper, B.

AU - Hüntemeyer, P. H.

AU - Kolterman, B. E.

AU - Lansdell, C. P.

AU - Linnemann, J. T.

AU - Mcenery, J. E.

AU - Mincer, A. I.

AU - Nemethy, P.

AU - Noyes, D.

AU - Ryan, J. M.

AU - Saz Parkinson, P. M.

AU - Shoup, A.

AU - Sinnis, G.

AU - Sullivan, G. W.

AU - Vasileiou, V.

AU - Walker, G. P.

AU - Williams, D. A.

AU - Xu, X. W.

AU - Yodh, G. B.

PY - 2007

Y1 - 2007

N2 - Active Galaxies such as Mrk 421 have been shown to be highly variable at all time scales. Atmospheric Cherenkov Telescopes (ACTs) have excellent instantaneous sensitivity and have observed short bright flares from Mrk 421. However, long duration variability is difficult to monitor with ACTs due to their intermittent exposure. Milagro, in contrast, monitorsMrk 421 with daily observations. While Milagro lacks the sensitivity to detect short duration flares unless they are i extremely bright, it is well suited to make long duration monitoring of the total flux of Mrk 421 on time scales from months to years. In this paper we present the long duration variability and total fluence of Mrk 421 using 6 years of data from Milagro.

AB - Active Galaxies such as Mrk 421 have been shown to be highly variable at all time scales. Atmospheric Cherenkov Telescopes (ACTs) have excellent instantaneous sensitivity and have observed short bright flares from Mrk 421. However, long duration variability is difficult to monitor with ACTs due to their intermittent exposure. Milagro, in contrast, monitorsMrk 421 with daily observations. While Milagro lacks the sensitivity to detect short duration flares unless they are i extremely bright, it is well suited to make long duration monitoring of the total flux of Mrk 421 on time scales from months to years. In this paper we present the long duration variability and total fluence of Mrk 421 using 6 years of data from Milagro.

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M3 - Paper

AN - SCOPUS:84899709395

SP - 973

EP - 976

T2 - 30th International Cosmic Ray Conference, ICRC 2007

Y2 - 3 July 2007 through 11 July 2007

ER -

Long duration variability of mrk 421

Abstract

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ASJC Scopus subject areas

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