2006A&A...459..453S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.13CET09:14:26

2006A&A...459..453S - Astronomy and Astrophysics, volume 459, 453-464 (2006/11-4)

Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov telescope.

SMITH D.A., BRION E., BRITTO R., BRUEL P., BUSSONS GORDO J., DUMORA D., DURAND E., ESCHSTRUTH P., ESPIGAT P., HOLDER J., JACHOLKOWSKA A., LAVALLE J., LE GALLOU R., LOTT B., MANSERI H., MUENZ F., NUSS E., PIRON F., RANNOT R.C., REPOSEUR T. and SAKO T.

Abstract (from CDS):

We have measured the gamma-ray fluxes of the blazars Mrk 421 and Mrk 501 in the energy range between 50 and 350GeV (1.2 to 8.3x1025Hz). The detector, called CELESTE, used first 40, then 53 heliostats of the former solar facility ``Themis'' in the French Pyrenees to collect Cherenkov light generated in atmospheric particle cascades. The signal from Mrk 421 is often strong. We compare its flux with previously published multi-wavelength studies and infer that we are straddling the high energy peak of the spectral energy distribution. The signal from Mrk 501 in 2000 was weak (3.4σ). We obtain an upper limit on the flux from 1ES 1426+428 of less than half that of the Crab flux near 100GeV. The data analysis and understanding of systematic biases have improved compared to previous work, increasing the detector's sensitivity.

Abstract Copyright:

Journal keyword(s): galaxies: BL Lacertae objects: individual: Mrk 421, 1ES 1426+428, Mrk 501 - gamma rays: observations - atmospheric effects

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2335 1
2 * 51 UMa ** 11 04 31.22566 +38 14 28.9130         5.86 A3III-IV 67 0
3 * 51 UMa A PM* 11 04 31.226 +38 14 28.91   6.175 6.018 7.39   A3III-IV 55 0
4 QSO B1426+428 BLL 14 28 32.6090831425 +42 40 21.050020627   16.95 16.45 14.4   ~ 447 2
5 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1880 2
6 QSO B1959+650 BLL 19 59 59.8525497024 +65 08 54.651170114     12.8 11.21   ~ 486 2

    Equat.    Gal    SGal    Ecl

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2019.12.13-09:14:26

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