H.E.S.S. is a system of Imaging Atmospheric Cherenkov Telescopes for the
investigation of cosmic gamma rays in the 100 GeV energy range. The name
H.E.S.S. stands for High Energy Stereoscopic System, and should also remind
us of Victor Hess, who received in 1936 the Nobel Prize in Physics for his
discovery of cosmic radiation. The instrument allows us to explore gamma-ray
sources with intensities at a level of a few thousandth parts of the flux of
the Crab nebula. H.E.S.S. is located in Namibia, near the Gamsberg, an area
well known for its excellent optical quality. The first of the four
telescopes of Phase I of the H.E.S.S. project went into operation in Summer
2002; all four were operational in December 2003, and were officially
inaugurated on September 28, 2004. In recognition of its scientific results,
H.E.S.S. was awarded the 2006 Descartes Prize for Research of the European
The HESSCAT database table was last updated on 19 March 2023.
The file http://www.mpi-hd.mpg.de/hfm/HESS/public/HESS_catalog.htm
This database table, first created in April 2008, contains the H.E.S.S.
source list created by Dr. W. Hofmann and is based on the HTML table at
. The latter table
is updated regularly and this HEASARC table will be updated within one week
of any updates.
The designation of the H.E.S.S. source using the 'HESS' prefix and
a J2000.0 coordinate string, as recommended by the CDS Dictionary of
Nomenclature of Celestial Objects.
The Right Ascension of the gamma-ray source in the selected equinox.
This was given in J2000.0 coordinates to a precision of 1 second of time
in the original table.
The Declination of the gamma-ray source in the selected equinox.
This was given in J2000.0 coordinates to a precision of 1 arcsecond
in the original table.
The Galactic Longitude of the gamma-ray source.
The Galactic Latitude of the gamma-ray source.
The maximum flux of the gamma-ray source, in Crab units.
The angular radius of the gamma-ray source, in arcminutes.
The counterpart of the gamma-ray source and/or other source
Publication reference(s) for the H.E.S.S. source.
The link to the H.E.S.S. Source of the Month page, if one
exists for the particular source.
Questions regarding the HESSCAT database table can be addressed to the
HEASARC User Hotline
Page Author: Browse Software Development Team
Friday, 20-Mar-2015 17:50:01 EDT