Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27559
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fukazawa, Yasushi | en_US |
dc.contributor.author | Shiki, Kensei | en_US |
dc.contributor.author | Tanaka, Yasuyuki | en_US |
dc.contributor.author | Itoh, Ryosuke | en_US |
dc.contributor.author | Takahashi, Hiromitsu | en_US |
dc.contributor.author | Imazato, Fumiya | en_US |
dc.contributor.author | D'AMMANDO, FILIPPO | en_US |
dc.contributor.author | Ojha, Roopesh | en_US |
dc.contributor.author | Nagai, Hiroshi | en_US |
dc.date.accessioned | 2020-10-02T15:10:31Z | - |
dc.date.available | 2020-10-02T15:10:31Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27559 | - |
dc.description.abstract | We analyzed Suzaku/XIS data (2006-2015) and Fermi/LAT data (2008-2015) of the gamma-ray emitting radio galaxy NGC 1275. Correlated brightening of the nucleus in both the X-ray and GeV gamma-ray energy bands was found for the period 2013-2015. This is the first evidence of correlated variability between these two energy bands for NGC 1275. We also analyzed Swift/XRT data and found that the X-ray flux increased over several days in 2010, coincidentally with the GeV gamma-ray flare. During the flare, the X-ray spectra were softer, with a photon index of ∼2 compared with 1.5-2.1 of the other periods, suggesting the brightening of a synchrotron component. The GeV gamma-ray band also showed a higher flux with a harder spectrum during the 2010 flare. Simultaneous X-ray and GeV gamma-ray flux increase in the flare could be explained by the shock-in-jet scenario. On the other hand, a long-term gradual brightening of radio, X-ray, and GeV gamma-ray flux with a larger gamma-ray amplitude could have an origin other than internal shocks, and some of these possibilities are discussed. | en_US |
dc.language.iso | eng | en_US |
dc.title | X-Ray and GeV Gamma-Ray Variability of the Radio Galaxy NGC 1275 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aaabc0 | en_US |
dc.identifier.scopus | 2-s2.0-85044032665 | en_US |
dc.identifier.isi | 000427362600009 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aaabc0 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 855 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 93 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 9 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | JPN | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018ApJ...855...93F | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0001-7618-7527 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Fukazawa_2018_ApJ_855_93.pdf | Pdf editoriale | 515.25 kB | Adobe PDF | View/Open |
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