A fast, very-high-energy γ -ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015 ?

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10 -10 photons cm -2 s -1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations.

Язык оригиналаАнглийский
Номер статьиA175
Число страниц14
ЖурналASTRONOMY & ASTROPHYSICS
Том623
DOI
СостояниеОпубликовано - 1 мар 2019

Предметные области Scopus

  • Астрономия и астрофизика
  • Космические науки и планетоведение

Цитировать

@article{1a28199919fd42fab1012f49b7840e09,
title = "A fast, very-high-energy γ -ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015 ?",
abstract = "The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10 -10 photons cm -2 s -1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations.",
keywords = "BL Lacertae objects: individual: BL Lacertae, gamma rays: galaxies, BROAD H-ALPHA, GALACTIC NUCLEI, TEV VARIABILITY, LAC OBJECTS, EMISSION, SWIFT, JET, LINE, SPECTRUM, FERMI, Gamma rays: galaxies",
author = "{MAGIC Collaboration} and {Fermi-LAT Collaboration} and Acciari, {V. A.} and S. Ansoldi and Antonelli, {L. A.} and Engels, {A. Arbet} and D. Baack and A. Babic and B. Banerjee and P. Bangale and {Barres de Almeida}, U. and Barrio, {J. A.} and {Becerra Gonzalez}, J. and W. Bednarek and E. Bernardini and A. Berti and J. Besenrieder and W. Bhattacharyya and C. Bigongiari and A. Biland and O. Blanch and G. Bonnoli and R. Carosi and G. Ceribella and S. Cikota and Colak, {S. M.} and P. Colin and E. Colombo and Contreras, {J. L.} and J. Cortina and S. Covino and V. D'Elia and {Da Vela}, P. and F. Dazzi and {De Angelis}, A. and {De Lotto}, B. and M. Delfino and J. Delgado and {Di Pierro}, F. and {Do Souto Espinera}, E. and A. Dominguez and Prester, {D. Dominis} and D. Dorner and M. Doro and S. Einecke and D. Elsaesser and Ramazani, {V. Fallah} and A. Fattorini and Larionov, {V. M.} and Grishina, {T. S.} and Morozova, {D. A.} and Nikiforova, {A. A.} and Эрштадт, {Светлана Георгиевна} and Копацкая, {Евгения Николаевна}",
year = "2019",
month = "3",
day = "1",
doi = "10.1051/0004-6361/201834010",
language = "Английский",
volume = "623",
journal = "ASTRONOMY & ASTROPHYSICS",
issn = "0004-6361",
publisher = "EDP Sciences",

}

A fast, very-high-energy γ -ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015 ? / MAGIC Collaboration; Fermi-LAT Collaboration ; Эрштадт, Светлана Георгиевна; Копацкая, Евгения Николаевна.

В: ASTRONOMY & ASTROPHYSICS, Том 623, A175, 01.03.2019.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - A fast, very-high-energy γ -ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015 ?

AU - MAGIC Collaboration

AU - Fermi-LAT Collaboration

AU - Acciari, V. A.

AU - Ansoldi, S.

AU - Antonelli, L. A.

AU - Engels, A. Arbet

AU - Baack, D.

AU - Babic, A.

AU - Banerjee, B.

AU - Bangale, P.

AU - Barres de Almeida, U.

AU - Barrio, J. A.

AU - Becerra Gonzalez, J.

AU - Bednarek, W.

AU - Bernardini, E.

AU - Berti, A.

AU - Besenrieder, J.

AU - Bhattacharyya, W.

AU - Bigongiari, C.

AU - Biland, A.

AU - Blanch, O.

AU - Bonnoli, G.

AU - Carosi, R.

AU - Ceribella, G.

AU - Cikota, S.

AU - Colak, S. M.

AU - Colin, P.

AU - Colombo, E.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Covino, S.

AU - D'Elia, V.

AU - Da Vela, P.

AU - Dazzi, F.

AU - De Angelis, A.

AU - De Lotto, B.

AU - Delfino, M.

AU - Delgado, J.

AU - Di Pierro, F.

AU - Do Souto Espinera, E.

AU - Dominguez, A.

AU - Prester, D. Dominis

AU - Dorner, D.

AU - Doro, M.

AU - Einecke, S.

AU - Elsaesser, D.

AU - Ramazani, V. Fallah

AU - Fattorini, A.

AU - Larionov, V. M.

AU - Grishina, T. S.

AU - Morozova, D. A.

AU - Nikiforova, A. A.

AU - Эрштадт, Светлана Георгиевна

AU - Копацкая, Евгения Николаевна

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10 -10 photons cm -2 s -1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations.

AB - The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10 -10 photons cm -2 s -1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations.

KW - BL Lacertae objects: individual: BL Lacertae

KW - gamma rays: galaxies

KW - BROAD H-ALPHA

KW - GALACTIC NUCLEI

KW - TEV VARIABILITY

KW - LAC OBJECTS

KW - EMISSION

KW - SWIFT

KW - JET

KW - LINE

KW - SPECTRUM

KW - FERMI

KW - Gamma rays: galaxies

UR - http://www.scopus.com/inward/record.url?scp=85063902229&partnerID=8YFLogxK

UR - http://arxiv.org/abs/1901.01733 http://dx.doi.org/10.1051/0004-6361/201834010

UR - http://www.mendeley.com/research/fast-very-high-energy-gammaray-flare-bl-lacertae-during-period-multiwavelength-activity-june-2015

U2 - 10.1051/0004-6361/201834010

DO - 10.1051/0004-6361/201834010

M3 - статья

VL - 623

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

M1 - A175

ER -