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2014-03

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/58584

Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes

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http://dx.doi.org/10.1051/0004-6361/201321360

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Motivated by the prediction of a high TeV luminosity we investigated whether the blazar 1ES 1727+502 (z = 0.055) is emitting very high energy (VHE, E > 100 GeV) γ rays. We observed the BL Lac object 1ES 1727+502 in stereoscopic mode with the two MAGIC telescopes for 14 nights between May 6th and June 10th 2011, for a total effective observing time of 12.6 h. To study the multiwavelength spectral energy distribution (SED), we used simultaneous optical R-band data from the KVA telescope, archival UV/optical and X-ray observations from instruments UVOT and XRT on board of the Swift satellite, and high energy (HE, 0.1 GeV-100 GeV) γ-ray data from the Fermi-LAT instrument. We detected, for the first time, VHE γ-ray emission from 1ES 1727+502 at a statistical significance of 5.5σ. The integral flux above 150 GeV is estimated to be (2.1 ± 0.4)% of the Crab nebula flux and the de-absorbed VHE spectrum has a photon index of (2.7 ± 0.5). No significant short-term variability was found in any of the wavebands presented here. We model the SED using a one-zone synchrotron self-Compton model obtaining parameters typical for this class of sources.

Matèries

Galàxies, Raigs gamma, Telescopis, Nucli galàctic actiu, Astrofísica

Matèries (anglès)

Galaxies, Gamma rays, Telescopes, Active galactic nuclei, Astrophysics

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citació

MAGIC Collaboration, MARCOTE MARTIN, Benito, MOLDÓN VARA, Francisco javier, MUNAR I ADROVER, Pere, PAREDES I POY, Josep maria, RIBÓ GOMIS, Marc, ZANIN, Roberta. Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes. _Astronomy and Astrophysics_. 2014. Vol. 563, núm. A90, pàgs. 1-7. [consulta: 26 de febrer de 2026]. ISSN: 0004-6361. [Disponible a: https://hdl.handle.net/2445/58584]

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