Back to Search
Start Over
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119
- Source :
- E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, Monthly notices of the Royal Astronomical Society 459(3), 3271-3281 (2016). doi:10.1093/mnras/stw689, E-Prints Complutense. Archivo Institucional de la UCM, instname, NASA Astrophysics Data System, Recercat. Dipósit de la Recerca de Catalunya, Monthly Notices of the Royal Astronomical Society, Dipòsit Digital de la UB, Universidad de Barcelona
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes observed the BL Lac object H1722+119 (redshift unknown) for six consecutive nights between 2013 May 17 and 22, for a total of 12.5 h. The observations were triggered by high activity in the optical band measured by the KVA (Kungliga Vetenskapsakademien) telescope. The source was for the first time detected in the very high energy (VHE, $E > 100$ GeV) $\gamma$-ray band with a statistical significance of 5.9 $\sigma$. The integral flux above 150 GeV is estimated to be $(2.0\pm 0.5)$ per cent of the Crab Nebula flux. We used contemporaneous high energy (HE, 100 MeV $ < E < 100$ GeV) $\gamma$-ray observations from Fermi-LAT (Large Area Telescope) to estimate the redshift of the source. Within the framework of the current extragalactic background light models, we estimate the redshift to be $z = 0.34 \pm 0.15$. Additionally, we used contemporaneous X-ray to radio data collected by the instruments on board the Swift satellite, the KVA, and the OVRO (Owens Valley Radio Observatory) telescope to study multifrequency characteristics of the source. We found no significant temporal variability of the flux in the HE and VHE bands. The flux in the optical and radio wavebands, on the other hand, did vary with different patterns. The spectral energy distribution (SED) of H1722+119 shows surprising behaviour in the $\sim 3\times10^{14} - 10^{18}$ Hz frequency range. It can be modelled using an inhomogeneous helical jet synchrotron self-Compton model.<br />Comment: 12 pages, 5 figures, 2 tables
- Subjects :
- galaxie [Gamma-rays]
gamma-rays: galaxies
UPGRADE
Astrophysics
DETECTED BLAZARS
01 natural sciences
LARGE-AREA TELESCOPE
law.invention
Raigs gamma
law
galaxies: active
BL Lacertae objects: individual: H1722+119
galaxies
distances and redshifts
BL LACERTAE OBJECTS
ALL-SKY SURVEY
MAGIC
TELESCOPES
LAC OBJECTS
SOURCE CATALOG
MAJOR
HELICAL JETS
CRAB-NEBULA
MAGIC (telescope)
010303 astronomy & astrophysics
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
distances and redshift [Galaxies]
active BL Lacertae objects
individual
H1722+119 galaxies
distances and redshifts gamma-rays
Galaxies: active
Galaxies: distances and redshifts
Gamma-rays: galaxies
Astronomy and Astrophysics
Space and Planetary Science
galaxies [Gamma-rays]
Extragalactic background light
Spectral energy distribution
Electrónica
Física nuclear
Electricidad
Astrophysics - High Energy Astrophysical Phenomena
BL Lac object
active [Galaxies]
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Owens Valley Radio Observatory
Astrophysics::Cosmology and Extragalactic Astrophysics
Telescope
galaxies: active, BL Lacertae objects: individual: H1722+119, galaxies: distances and redshifts, gamma-rays: galaxies
0103 physical sciences
individual: H1722+119 [BL Lacertae objects]
distances and redshifts [Galaxies]
ta115
010308 nuclear & particles physics
Gamma rays
Astronomy
Astronomy and Astrophysic
Redshift
Crab Nebula
13. Climate action
Galàxies actives
Active galaxies
ddc:520
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, Monthly notices of the Royal Astronomical Society 459(3), 3271-3281 (2016). doi:10.1093/mnras/stw689, E-Prints Complutense. Archivo Institucional de la UCM, instname, NASA Astrophysics Data System, Recercat. Dipósit de la Recerca de Catalunya, Monthly Notices of the Royal Astronomical Society, Dipòsit Digital de la UB, Universidad de Barcelona
- Accession number :
- edsair.doi.dedup.....85a3d0cd70dcc6da5e09f70a0d3be2cb