Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/26514
Titolo: | Multi-Wavelength Observations On The Gamma-Ray Blazar PG1553+113 As A Probe For Geometrical Periodical Modulation | Autori: | STAMERRA, Antonio PRANDINI, ELISA PAIANO, Simona Da Vela, P. Gareth, H. COVINO, Stefano Cutini, S. Sandrinelli, A. Sobacchi, E. Sormani, M. C. |
Data pubblicazione: | 2016 | Titolo del volume in cui è pubblicato il poster: | Active Galactic Nuclei 12: A Multi-Messenger Perspective (AGN12) | Da pagina:: | 64 | Abstract: | New claims of periodic variability from gamma-ray blazars have been reported, possibly pointing at milli-pc SMBH binary systems. A modulation of 2 year on 3.5 cycles was recently discovered with Fermi/LAT on the blazar PG1553+113 - for the first time in gamma-rays with high significance - and confirmed by optical lightcurves. Other possible gamma-ray periodic variations have been claimed on PKS 2155-304 and PKS 0537 by Sandrinelli et al. (2015, 2016). The interpretation of such periodicity, when confirmed with continuous observations in following years, is not straightforward. Emission from blazars is dominated by non-thermal emission from the jet; different processes in the jet or at its base, may lead to quasi-periodic emission. We used multi-wavelength (MWL) observations on PG1553+113 to investigate if the observed modulation can be explained with geometrical variations in the jet, possibly pointing to jet precession or to an helical pattern. The ongoing MWL monitoring campaign from radio to very-high energy gamma-ray bands, led by the MAGIC collaboration, will follow the maximum expected at the beginning of 2017, and will allow to set tighter constrains on underlying periodic processes. | Titolo del convegno: | Active Galactic Nuclei 12: A Multi-Messenger Perspective (AGN12) | Luogo del convegno: | Napoli, Italy | Periodo del convegno: | 26-29 September, 2016 | URI: | http://hdl.handle.net/20.500.12386/26514 | URL: | https://zenodo.org/record/163826#.XuJGoi17ndQ | DOI: | 10.5281/zenodo.163826 | Bibcode ADS: | 2016agnt.confE..64S | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
agn12_stamerra_talk.pdf | Talk | 6.94 MB | Adobe PDF | Visualizza/apri |
Page view(s)
83
controllato il 11-set-2024
Download(s)
19
controllato il 11-set-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.