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Very high energy gamma-ray observation of the peculiar transient event Swift J1644+57 with the MAGIC telescopes and AGILE
- Source :
- E-Prints Complutense. Archivo Institucional de la UCM, instname, A&A, Biblos-e Archivo. Repositorio Institucional de la UAM, Astronomy and astrophysics 552(A112 ), 1-6 (2013). doi:10.1051/0004-6361/201321197, E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid
- Publication Year :
- 2013
- Publisher :
- ESO, 2013.
-
Abstract
- Astronomy and astrophysics 552(A112 ), 1-6 (2013). doi:10.1051/0004-6361/201321197<br />Context. 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 dataduring 12 nights. The source was observed in wobble mode during dark time at a mean zenith angle of 35◦. 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 theemission 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.<br />Published by EDP Sciences, Les Ulis
- Subjects :
- Swift Gamma-Ray Burst Mission
active [Galaxies]
Radiation mechanisms: non-thermal
TIDAL DISRUPTION
Astrophysics::High Energy Astrophysical Phenomena
radiation mechanisms: non-thermal
galaxies: active
Gamma rays: general
general [Gamma rays]
Astrophysics
01 natural sciences
Tidal disruption event
NEARBY
0103 physical sciences
Blazar
010303 astronomy & astrophysics
Zenith
Physics
gamma rays: general
non-thermal [Radiation mechanisms]
STAR
010308 nuclear & particles physics
Gamma ray
Astronomy
Física
MASSIVE BLACK-HOLE
GALAXIES
BLAZARS
Astronomy and Astrophysics
Galaxies: active
Galaxy
13. Climate action
Space and Planetary Science
ddc:520
Electrónica
Física nuclear
Electricidad
Gamma-ray burst
Fermi Gamma-ray Space Telescope
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- E-Prints Complutense. Archivo Institucional de la UCM, instname, A&A, Biblos-e Archivo. Repositorio Institucional de la UAM, Astronomy and astrophysics 552(A112 ), 1-6 (2013). doi:10.1051/0004-6361/201321197, E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid
- Accession number :
- edsair.doi.dedup.....25da4ac7283bf5531d96209fa260d6b1
- Full Text :
- https://doi.org/10.1051/0004-6361/201321197