Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



  history
ID: 543646.0, MPI für Physik / MPI für Physik
Is the Giant Radio Galaxy M87 a TeV Gamma-Ray Emitter?
Authors:HEGRA Collaboration; Aharonian, F.; Akhperjanian, A.; Beilicke, M.; et al.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Astronomy &Amp; Astrophysics
Journal Abbrev.:Astron.Astrophys.
Issue / Number:403
Start Page:L1
End Page:L5
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio galaxy M87 has been measured at a significance level above 4 sigma. The data have been taken during the years 1998 and 1999 with the HEGRA stereoscopic system of 5 imaging atmospheric Cherenkov telescopes. The excess of 107.4 +- 26.8 events above 730 GeV corresponds to an integral flux of 3.3% of the Crab flux or N_gamma(E > 730 GeV) = (0.96 +- 0.23) * 10^(-12) phot.cm^(-2)s^(-1). M87 is located at the center of the Virgo cluster of galaxies at a relatively small redshift of z = 0.00436 and is a promising candidate among the class of giant radio galaxies for the emission of TeV gamma-radiation. The detection of TeV gamma-rays from M87 -- if confirmed -- would establish a new class of extragalactic source in this energy regime since all other AGN detected to date at TeV energies are BL Lac type objects.
Classification / Thesaurus:HEGRA
Comment of the Author/Creator:5 pages, 3 figures, refereed version
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2003-31
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/astro-ph/0302155
URL:http://publications.mppmu.mpg.de/?action=search&mp...
Full Text:
You have privileges to view the following file(s):
astro-ph/0302155.pdf  [171,00 Kb] [Comment:file from upload service]  
 
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.