Constraints on the infra-red Background

Details Constraints on the infra-red Background Constraints on the infra-red Background

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sf2a.conf..307r&link_type=abstract

Abstracts from SF2A-2001: Semaine de l'Astrophysique Francaise, meeting held in Lyon, France, May 28-June 1st, 2001, Eds.: F. Co

Astronomy and Astrophysics

Astrophysics

Scientific paper

The TEV gamma-ray data obtained by CAT and HEGRA on the AGN Mkn 501 are used to constrain the infra-red background density around 10 microns. Recent measurements of this near- and far-IR background allow to fix the IR density at high and low energy and to let free only the range 3.5-100 microns, which is essentially unexplored. Conservative hypotheses on the intrinsic shape of the Mkn 501 spectrum lead to un upper limit of 4.7 nW/m2/sr between 5 and 15 microns. This result is rather unsensitive to the precise IR density bellow 3.5 microns or above 100 microns. A purely extra-galactic origin of the background at 60 microns is also excluded.

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