Publication:
Very high energy gamma-ray observation of the peculiar transient event Swift J1644+57 with the MAGIC telescopes and AGILE

dc.contributor.authorAntoranz Canales, Pedro
dc.contributor.authorBarrio Uña, Juan Abel
dc.contributor.authorContreras González, José Luis
dc.contributor.authorFonseca González, Mª Victoria
dc.contributor.authorLópez Moya, Marcos
dc.contributor.authorMiranda Pantoja, José Miguel
dc.contributor.authorSatalecka, Konstanzja
dc.contributor.authorScapin, Valeria
dc.date.accessioned2023-06-19T13:23:28Z
dc.date.available2023-06-19T13:23:28Z
dc.date.issued2013-04
dc.description© ESO 2013. We would like to thank Gabriele Ghisellini for providing the SED model points used to describe the object. We would like to thank the Instituto de Astrofisica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN is gratefully acknowledged. This work was also supported by the CPAN CSD2007-00042 and MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010 programme, by grant DO02-353 of the Bulgarian NSF, by grant 127740 of the Academy of Finland, by the DFG Cluster of Excellence "Origin and Structure of the Universe", by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0.
dc.description.abstractContext. On March 28, 2011, the BAT instrument on board the Swift satellite detected a new transient event that in the very beginning was classified as a gamma ray burst (GRB). However, the unusual X-ray flaring activity observed from a few hours up to days after the onset of the event made a different nature seem to be more likely. The long-lasting activity in the X-ray band, followed by a delayed brightening of the source in infrared and radio activity, suggested that it is better interpreted as a tidal disruption event that triggered a dormant black hole in the nucleus of the host galaxy and generated an outflowing jet of relativistic matter. Aims. Detecting a very high energy emission component from such a peculiar object would be enable us to constrain the dynamic of the emission processes and the jet model by providing information on the Doppler factor of the relativistic ejecta. Methods. The MAGIC telescopes observed the peculiar source Swift J1644+57 during the flaring phase, searching for gamma-ray emission at very-high energy (VHE, E > 100 GeV), starting observations nearly 2.5 days after the trigger time. MAGIC collected a total of 28 h of data during 12 nights. The source was observed in wobble mode during dark time at a mean zenith angle of 35 degrees. Data were reduced using a new image-cleaning algorithm, the so-called sum-cleaning, which guarantees a better noise suppression and a lower energy threshold than the standard analysis procedure. Results. No clear evidence for emission above the energy threshold of 100 GeV was found. MAGIC observations permit one to constrain the emission from the source down to 100 GeV, which favors models that explain the observed lower energy variable emission. Data analysis of simultaneous observations from AGILE, Fermi and VERITAS also provide negative detection, which additionally constrain the self-Compton emission component.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipGerman BMBF
dc.description.sponsorshipGerman MPG
dc.description.sponsorshipItalian INFN
dc.description.sponsorshipSwiss National Fund SNF
dc.description.sponsorshipSpanish MICINN
dc.description.sponsorshipSpanish Consolider-Ingenio
dc.description.sponsorshipDFG Cluster of Excellence "Origin and Structure of the Universe"
dc.description.sponsorshipDFG Collaborative Research Centers
dc.description.sponsorshipPolish MNiSzW
dc.description.sponsorshipBulgarian NSF
dc.description.sponsorshipAcademy of Finland
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/24789
dc.identifier.doi10.1051/0004-6361/201321197
dc.identifier.issn0004-6361
dc.identifier.officialurlhttp://dx.doi.org/10.1051/0004-6361/201321197
dc.identifier.relatedurlhttp://www.aanda.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/33494
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciencies
dc.relation.projectIDCPAN CSD2007-00042
dc.relation.projectIDMultiDark CSD2009-00064
dc.relation.projectIDSFB823/C4
dc.relation.projectIDSFB876/C3
dc.relation.projectID745/N-HESS-MAGIC/2010/0
dc.relation.projectIDDO02-353
dc.relation.projectID127740
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.cdu539.1
dc.subject.keywordMassive Black-Hole
dc.subject.keywordTidal Disruption
dc.subject.keywordGalaxies
dc.subject.keywordStar
dc.subject.keywordBlazars
dc.subject.keywordNearby.
dc.subject.ucmElectricidad
dc.subject.ucmElectrónica (Física)
dc.subject.ucmFísica nuclear
dc.subject.unesco2202.03 Electricidad
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleVery high energy gamma-ray observation of the peculiar transient event Swift J1644+57 with the MAGIC telescopes and AGILE
dc.typejournal article
dc.volume.number552
dspace.entity.typePublication
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