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Pregled bibliografske jedinice broj: 1124734

H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016


(H.E.S.S., MAGIC) H.E.S.S. Collaboration; Abdalla, H.; ...; Żywucka, N.; MAGIC Collaboration; Acciari, V. A.; ...; Babić, Ana; ...; Bošnjak, Željka et al.
H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016 // Astronomy & astrophysics (Berlin), 648 (2021), A23, 22 doi:10.1051/0004-6361/202038949 (međunarodna recenzija, članak, znanstveni)


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Naslov
H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016

Autori
H.E.S.S. Collaboration ; Abdalla, H. ; ... ; Żywucka, N. ; MAGIC Collaboration ; Acciari, V. A. ; ... ; Babić, Ana ; ... ; Bošnjak, Željka ; ... ; Cikota, Stefan ; ... ; Dominis Prester, Dijana ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Manganaro, Marina ; ... ; Mićanović, Saša ; ... ; Pavletić, Lovro ; ... ; Puljak, Ivica ; ... ; Šnidarić, Iva ; ... ; Surić, Tihomir ; ... ; Terzić, Tomislav ; ... ; Zarić, Darko ; ... ; Weaver, Z.R.

Kolaboracija
H.E.S.S., MAGIC

Izvornik
Astronomy & astrophysics (Berlin) (0004-6361) 648 (2021); A23, 22

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes

Sažetak
The flat spectrum radio quasar (FSRQ) PKS 1510−089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E > 100 GeV) γ rays. The VHE γ-ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE γ-ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of ∼20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE γ-ray spectrum of PKS 1510–089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the γ-ray flare, even though the detailed flux evolution differs from the VHE γ-ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE γ-ray flare. In the high-energy (HE, E > 100 MeV) γ-ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE γ-ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the γ-ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located ∼50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE γ rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekti:
HRZZ-IP-2016-06-9782 - Visokoenergijska astronomija gama-zraka teleskopima MAGIC i CTA (MAGIC-CTA) (Godinović, Nikola, HRZZ - 2016-06) ( POIROT)

Ustanove:
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Fakultet elektrotehnike i računarstva, Zagreb,
Institut "Ruđer Bošković", Zagreb,
Sveučilište u Osijeku - Odjel za fiziku,
Sveučilište u Rijeci - Odjel za fiziku

Citiraj ovu publikaciju

(H.E.S.S., MAGIC) H.E.S.S. Collaboration; Abdalla, H.; ...; Żywucka, N.; MAGIC Collaboration; Acciari, V. A.; ...; Babić, Ana; ...; Bošnjak, Željka et al.
H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016 // Astronomy & astrophysics (Berlin), 648 (2021), A23, 22 doi:10.1051/0004-6361/202038949 (međunarodna recenzija, članak, znanstveni)
(H.E.S.S., MAGIC) (H.E.S.S., M., Abdalla, H., ..., Żywucka, N., MAGIC Collaboration, Acciari, V., ..., Babić, A., ... & Bošnjak, Ž. (2021) H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016. Astronomy & astrophysics (Berlin), 648, A23, 22 doi:10.1051/0004-6361/202038949.
@article{article, year = {2021}, pages = {22}, DOI = {10.1051/0004-6361/202038949}, chapter = {A23}, keywords = {radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes}, journal = {Astronomy and astrophysics (Berlin)}, doi = {10.1051/0004-6361/202038949}, volume = {648}, issn = {0004-6361}, title = {H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016}, keyword = {radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes}, chapternumber = {A23} }
@article{article, year = {2021}, pages = {22}, DOI = {10.1051/0004-6361/202038949}, chapter = {A23}, keywords = {radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes}, journal = {Astronomy and astrophysics (Berlin)}, doi = {10.1051/0004-6361/202038949}, volume = {648}, issn = {0004-6361}, title = {H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016}, keyword = {radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes}, chapternumber = {A23} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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