2001ApJ...560L..45K

Query : 2001ApJ...560L..45K

2001ApJ...560L..45K - Astrophys. J., 560, L45-L48 (2001/October-2)

Cutoff in the TeV energy spectrum of Markarian 421 during strong flares in 2001.

KRENNRICH F., BADRAN H.M., BOND I.H., BRADBURY S.M., BUCKLEY J.H., CARTER-LEWIS D.A., CATANESE M., CUI W., DUNLEA S., DAS D., DE LA CALLE PEREZ I., FEGAN D.J., FEGAN S.J., FINLEY J.P., GAIDOS J.A., GIBBS K., GILLANDERS G.H., HALL T.A., HILLAS A.M., HOLDER J., HORAN D., JORDAN M., KERTZMAN M., KIEDA D., KILDEA J., KNAPP J., KOSACK K., LANG M.J., LE BOHEC S., McKERNAN B., MORIARTY P., MULLER D., ONG R., PALLASSINI R., PETRY D., QUINN J., REAY N.W., REYNOLDS P.T., ROSE H.J., SEMBROSKI G.H., SIDWELL R., STANTON N., SWORDY S.P., VASSILIEV V.V., WAKELY S.P. and WEEKES T.C.

Abstract (from CDS):

Exceptionally strong and long-lasting flaring activity of the blazar Mrk 421 occurred between 2001 January and March. Based on the excellent signal-to-noise ratio of the data, we derive the energy spectrum between 260 GeV and 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead, the data can be described by a power law with exponential cutoff: dN/dE∝E–2.14±0.03state–E/E0_^ m–2 s–1 TeV–1 with E0=4.3±0.3stat TeV. Mrk 421 is the second γ-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV.

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Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Name: Markarian 421 - Gamma Rays: Observations

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
3 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
4 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2

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