Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/121165
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | HESS observations of the flaring gravitationally lensed galaxy PKS 1830-211 |
Author: | Abdalla, H. Aharonian, F. Benkhali, F.A. Anguner, E.O. Arakawa, M. Arcaro, C. Armand, C. Arrieta, M. Backes, M. Barnard, M. Becherini, Y. Tjus, J.B. Berge, D. Bernloehr, K. Blackwell, R. Bottcher, M. Boisson, C. Bolmont, J. Bonnefoy, S. Bordas, P. et al. |
Citation: | Monthly Notices of the Royal Astronomical Society, 2019; 486(3):3886-3891 |
Publisher: | Oxford University Press |
Issue Date: | 2019 |
ISSN: | 1365-2966 1365-2966 |
Statement of Responsibility: | H Abdalla, F Aharonian, F Ait Benkhali, E O Angüner ... Gavin P Rowell ... Fabien Voisin ... et al. (H E S S Collaboration) |
Abstract: | PKS 1830–211 is a known macrolensed quasar located at a redshift of z = 2.5. Its high-energy gamma-ray emission has been detected with the Fermi-Large Area Telescope (LAT) instrument and evidence for lensing was obtained by several authors from its high-energy data. Observations of PKS 1830–211 were taken with the High Energy Stereoscopic System (H.E.S.S.) array of Imaging Atmospheric Cherenkov Telescopes in 2014 August, following a flare alert by the Fermi-LAT Collaboration. The H.E.S.S observations were aimed at detecting a gamma-ray flare delayed by 20–27 d from the alert flare, as expected from observations at other wavelengths. More than 12 h of good-quality data were taken with an analysis threshold of ∼67 GeV. The significance of a potential signal is computed as a function of the date and the average significance over the whole period. Data are compared to simultaneous observations by Fermi-LAT. No photon excess or significant signal is detected. An upper limit on PKS 1830–211 flux above 67 GeV is computed and compared to the extrapolation of the Fermi-LAT flare spectrum. |
Keywords: | Gravitational lensing: strong; diffuse radiation; gamma-rays: galaxies |
Rights: | 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society |
DOI: | 10.1093/mnras/stz1031 |
Published version: | http://dx.doi.org/10.1093/mnras/stz1031 |
Appears in Collections: | Aurora harvest 4 Physics publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.