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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10193044%21RIV14-MSM-11320___
rdf:type
skos:Concept n11:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1051/0004-6361/201321108
dcterms:description
Very high-energy gamma-ray emission from PKS 0447-439 was detected with the H. E. S. S. Cherenkov telescope array in December 2009. This blazar is one of the brightest extragalactic objects in the Fermi bright source list and has a hard spectrum in the MeV to GeV range. In the TeV range, a photon index of 3.89 +/- 0.37 (stat) +/- 0.22 (sys) and a flux normalisation at 1 TeV, phi(1) (TeV) = (3.5 +/- 1.1(stat) +/- 0.9(sys)) x 10(-13) cm(-2) s(-1) TeV-1 were found. The detection with H. E. S. S. triggered observations in the X-ray band with the Swift and RXTE telescopes. Simultaneous UV and optical data from Swift UVOT and data from the optical telescopes ATOM and ROTSE are also available. The spectrum and light curve measured with H. E. S. S. are presented and compared to the multi-wavelength data at lower energies. A rapid flare is seen in the Swift XRT and RXTE data, together with a flux variation in the UV band, at a time scale of the order of one day. A firm upper limit of z < 0.59 on the redshift of PKS 0447-439 is derived from the combined Fermi-LAT and H. E. S. S. data, given the assumptions that there is no upturn in the intrinsic spectrum above the Fermi-LAT energy range and that absorption on the extragalactic background light (EBL) is not weaker than the lower limit provided by current models. The spectral energy distribution is well described by a simple one-zone synchrotron self-Compton scenario, if the redshift of the source is less than z less than or similar to 0.4. Very high-energy gamma-ray emission from PKS 0447-439 was detected with the H. E. S. S. Cherenkov telescope array in December 2009. This blazar is one of the brightest extragalactic objects in the Fermi bright source list and has a hard spectrum in the MeV to GeV range. In the TeV range, a photon index of 3.89 +/- 0.37 (stat) +/- 0.22 (sys) and a flux normalisation at 1 TeV, phi(1) (TeV) = (3.5 +/- 1.1(stat) +/- 0.9(sys)) x 10(-13) cm(-2) s(-1) TeV-1 were found. The detection with H. E. S. S. triggered observations in the X-ray band with the Swift and RXTE telescopes. Simultaneous UV and optical data from Swift UVOT and data from the optical telescopes ATOM and ROTSE are also available. The spectrum and light curve measured with H. E. S. S. are presented and compared to the multi-wavelength data at lower energies. A rapid flare is seen in the Swift XRT and RXTE data, together with a flux variation in the UV band, at a time scale of the order of one day. A firm upper limit of z < 0.59 on the redshift of PKS 0447-439 is derived from the combined Fermi-LAT and H. E. S. S. data, given the assumptions that there is no upturn in the intrinsic spectrum above the Fermi-LAT energy range and that absorption on the extragalactic background light (EBL) is not weaker than the lower limit provided by current models. The spectral energy distribution is well described by a simple one-zone synchrotron self-Compton scenario, if the redshift of the source is less than z less than or similar to 0.4.
dcterms:title
Discovery of TeV gamma-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift Discovery of TeV gamma-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
skos:prefLabel
Discovery of TeV gamma-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift Discovery of TeV gamma-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
skos:notation
RIV/00216208:11320/13:10193044!RIV14-MSM-11320___
n11:predkladatel
n15:orjk%3A11320
n3:aktivita
n12:Z n12:I
n3:aktivity
I, Z(MSM0021620859)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2014
n3:domaciTvurceVysledku
n8:6144063
n3:druhVysledku
n6:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
69835
n3:idVysledku
RIV/00216208:11320/13:10193044
n3:jazykVysledku
n20:eng
n3:klicovaSlova
redshift; its; limit; upper; derivation; 0447-439; PKS; emission; gamma-ray; TeV; Discovery
n3:klicoveSlovo
n5:0447-439 n5:Discovery n5:upper n5:emission n5:limit n5:TeV n5:its n5:derivation n5:redshift n5:PKS n5:gamma-ray
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[ED36D1E34A81]
n3:nazevZdroje
Astronomy and Astrophysics
n3:obor
n16:BF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
205
n3:rokUplatneniVysledku
n4:2013
n3:svazekPeriodika
552
n3:tvurceVysledku
Brun, P. Brun, F. Behera, B. Akhperjanian, A. G. Casanova, S. Chaves, R. C. G. Abramowski, A. Biteau, J. Cerruti, M. Brucker, J. Anton, G. Bernloehr, K. Bochow, A. Boisson, C. Bulik, T. Chadwick, P. M. Colafrancesco, S. Tjus, J. Becker Cologna, G. Balzer, A. Becherini, Y. Nedbal, Dalibor Aharonian, F. Birsin, E. Bolmont, J. Carrigan, S. Bordas, P. Acero, F. Balenderan, S. Rob, L. Cheesebrough, A. Barnacka, A.
n3:wos
000317912000117
n3:zamer
n18:MSM0021620859
s:issn
0004-6361
s:numberOfPages
7
n21:doi
10.1051/0004-6361/201321108
n14:organizacniJednotka
11320