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Pregled bibliografske jedinice broj: 1096339

Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016


(MAGIC Collaboration) Acciari, V. A.; ...Babić, Ana; ...; Bošnjak, Željka; ...; Cikota, Stefan, ...; Prester Dominis, Dijana; ...; Godinović, Nikola; ... et al.
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016 // Monthly notices of the Royal Astronomical Society, 504 (2020), 1427-1451 doi:10.1093/mnras/staa3727 (međunarodna recenzija, članak, znanstveni)


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Naslov
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016

Autori
Acciari, V. A. ; ...Babić, Ana ; ... ; Bošnjak, Željka ; ... ; Cikota, Stefan, ... ; Prester Dominis, Dijana ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Manganaro, Marina ; ... ; Mićanović, Saša ; ... ; Pavletić, Lovro ; ... ; Puljak, Ivica ; ... ; Šnidarić, Iva, ... ; Surić, Tihomir, ... ; Terzić, Tomislav ; ... ; Zarić, Darko ; ... ; A. Y. Lien

Kolaboracija
MAGIC Collaboration

Izvornik
Monthly notices of the Royal Astronomical Society (0035-8711) 504 (2020); 1427-1451

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

Ključne riječi
galaxies: active ; BL Lacertae objects: individual: Mrk 421 ; methods: data analysis ; methods: observational ; radiation mechanisms: non-thermal

Sažetak
We report a characterization of the multi-band flux variability and correlations of the nearby (z=0.031) blazar Markarian 421 (Mrk 421) using data from Metsähovi, Swift, Fermi-LAT, MAGIC, FACT and other collaborations and instruments from November 2014 till June 2016. Mrk 421 did not show any prominent flaring activity, but exhibited periods of historically low activity above 1 TeV (F>1TeV < 1.7× 10−12 ph cm−2 s−1) and in the 2-10 keV (X-ray) band (F2 − 10 keV < 3.6 × 10−11 erg cm−2 s−1), during which the Swift-BAT data suggests an additional spectral component beyond the regular synchrotron emission.The highest flux variability occurs in X-rays and very-high-energy (E>0.1 TeV) γ-rays, which, despite the low activity, show a significant positive correlation with no time lag. The HRkeV and HRTeV show the harder-when-brighter trend observed in many blazars, but the trend flattens at the highest fluxes, which suggests a change in the processes dominating the blazar variability. Enlarging our data set with data from years 2007 to 2014, we measured a positive correlation between the optical and the GeV emission over a range of about 60 days centered at time lag zero, and a positive correlation between the optical/GeV and the radio emission over a range of about 60 days centered at a time lag of 43+9−6 days.This observation is consistent with the radio-bright zone being located about 0.2 parsec downstream from the optical/GeV emission regions of the jet. The flux distributions are better described with a LogNormal function in most of the energy bands probed, indicating that the variability in Mrk 421 is likely produced by a multiplicative process.

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

(MAGIC Collaboration) Acciari, V. A.; ...Babić, Ana; ...; Bošnjak, Željka; ...; Cikota, Stefan, ...; Prester Dominis, Dijana; ...; Godinović, Nikola; ... et al.
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016 // Monthly notices of the Royal Astronomical Society, 504 (2020), 1427-1451 doi:10.1093/mnras/staa3727 (međunarodna recenzija, članak, znanstveni)
(MAGIC Collaboration) (MAGIC Collaboration) Acciari, V., ...Babić, A., ..., Bošnjak, Ž., ..., Cikota, Stefan, ..., Prester Dominis, D., ..., Godinović, N. & ... et al. (2020) Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016. Monthly notices of the Royal Astronomical Society, 504, 1427-1451 doi:10.1093/mnras/staa3727.
@article{article, year = {2020}, pages = {1427-1451}, DOI = {10.1093/mnras/staa3727}, keywords = {galaxies: active, BL Lacertae objects: individual: Mrk 421, methods: data analysis, methods: observational, radiation mechanisms: non-thermal}, journal = {Monthly notices of the Royal Astronomical Society}, doi = {10.1093/mnras/staa3727}, volume = {504}, issn = {0035-8711}, title = {Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016}, keyword = {galaxies: active, BL Lacertae objects: individual: Mrk 421, methods: data analysis, methods: observational, radiation mechanisms: non-thermal} }
@article{article, year = {2020}, pages = {1427-1451}, DOI = {10.1093/mnras/staa3727}, keywords = {galaxies: active, BL Lacertae objects: individual: Mrk 421, methods: data analysis, methods: observational, radiation mechanisms: non-thermal}, journal = {Monthly notices of the Royal Astronomical Society}, doi = {10.1093/mnras/staa3727}, volume = {504}, issn = {0035-8711}, title = {Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016}, keyword = {galaxies: active, BL Lacertae objects: individual: Mrk 421, methods: data analysis, methods: observational, radiation mechanisms: non-thermal} }

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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