2009A&A...498L..25B


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.06CET19:33:26

2009A&A...498L..25B - Astronomy and Astrophysics, volume 498, L25-28 (2009/5-1)

Search for diffuse gamma rays from the Galactic anticentre region above 100 GeV with CELESTE.

BRITTO R.J., JACHOLKOWSKA A., PIRON F., BRION E., BUSSONS GORDO J., DEBIAIS G., FABRE B., LAVALLE J., MUNZ F., NUSS E., RANNOT R.C. and REPOSEUR T.

Abstract (from CDS):

Located in the French Pyrenees, CELESTE was the first ground-based γ-ray telescope with an energy threshold below 100GeV. It acquired data from 1999 to 2004, and allowed flux measurements of the Crab nebula and the blazars Mrk 421 and Mrk 501. We search for Galactic diffuse γ-ray emission, which is most significant around the Galactic plane, for b=[-5°, +5°]. By using the significant data set available for the Crab nebula, we selected Crab OFF-source data at various Galactic latitudes, in order to analyse the diffuse emission. Selection criteria were applied to the sky position, atmospheric conditions, and detector stability. We obtained 108mn of data in the Galactic anticentre region, providing the first upper limits of around 100 GeV to the diffuse γ-ray emission with atmospheric Cherenkov detectors. These limits are φintUL(E>140GeV)=9.4x10–3/m2/s/sr and φintUL(E>120GeV)=1.2x10–2/m2/s/sr.

Abstract Copyright:

Journal keyword(s): gamma rays: observations - methods: data analysis - methods: statistical - radiation mechanisms: non-thermal

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5705 4
2 NAME Gal Anticenter reg 05 46 +28.9           ~ 748 0
3 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2428 1
4 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1954 2
5 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12014 0

    Equat.    Gal    SGal    Ecl

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2021.03.06-19:33:26

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