Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Québert, J"'
Autor:
De Naurois, M., Holder, J., Bazer-Bachi, R., Bergeret, H., Bruel, P., Cordier, A., Debiais, G., Dezalay, J-P., Dumora, D., Durand, E., Eschstruth, P., Espigat, P., Fabre, B., Fleury, P., Herault, N., Hrabovsky, M., Incerti, S., Gallou, R. Le, Munz, F., Musquere, A., Olive, J-F., Pare, E., Quebert, J., Rannot, R. C., Reposeur, T., Rob, L., Roy, P., Sako, T., Schovanek, P., Smith, D. A., Snabre, P., Volte, A.
Publikováno v:
Astrophys.J.566:343-357,2002
We have converted the former solar electrical plant THEMIS (French Pyrenees) into an atmospheric Cherenkov detector called CELESTE, which records gamma rays above 30 GeV (7E24 Hz). Here we present the first sub-100 GeV detection by a ground based tel
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107301
Autor:
Djannati-Atai, A., Piron, F., Barrau, A., Iacoucci, L., Punch, M., Tavernet, J. -P., Bazer-Bachi, R., Cabot, H., Chounet, L. -M., Debiais, G., Degrange, B., Dezalay, J. -P., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., Ghesquière, C., Goret, P., Gouiffes, C., Grenier, I. A., Bohec, S. Le, Malet, I., Meynadier, C., Mohanty, G., Nuss, E., Paré, E., Québert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schahmaneche, K., Smith, D. A.
Publikováno v:
Astron.Astrophys. 350 (1999) 17-24
The BL Lac object Mrk 501 went into a very high state of activity during 1997, both in VHE gamma-rays and X-rays. We present here results from observations at energies above 250 GeV carried out between March and October 1997 with the CAT Cerenkov ima
Externí odkaz:
http://arxiv.org/abs/astro-ph/9906060
Autor:
Bohec, S. Le, Degrange, B., Punch, M., Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M, Debiais, G., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Malet, I., Meynadier, C., Munz, F., Palfrey, T. A., Pare, E., Pons, Y., Quebert, J., Ragan, K., renault, C., Rivoal, M., Rob, L., Schovaneck, P., Smith, D., Tavernet, J. P., Vrana, J.
Publikováno v:
Nucl.Instrum.Meth. A416 (1998) 425-437
A new method of shower-image analysis is presented which appears very powerful as applied to those Cherenkov Imaging Telescopes with very high definition imaging capability. It provides hadron rejection on the basis of a single cut on the image shape
Externí odkaz:
http://arxiv.org/abs/astro-ph/9804133
Autor:
Barrau, A., Bazer-Bachi, R., Beyer, E., Cabot, H., Cerutti, M., Chounet, L. M., Debiais, G., Degrange, B., Delchini, H., Denance, J. P., Descotes, G., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Gilly, J., Goret, P., Gouiffes, C., Gouillaud, J. C., Gregory, C., Grenier, I. A., Iacoucci, L., Kalt, L., Bohec, S. Le, Malet, I., Meynadier, C., Mols, J. P., de Freitas, P. Mora, Morano, R., Morinaud, G., Munz, F., Palatka, M., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tabary, A., Tavernet, J. P., Toussenel, F., Vrana, J.
Publikováno v:
Nucl.Instrum.Meth. A416 (1998) 278-292
The CAT (Cherenkov Array at Themis) imaging telescope, equipped with a very-high-definition camera (546 fast phototubes with 0.12 degrees spacing surrounded by 54 larger tubes in two guard rings) started operation in Autumn 1996 on the site of the fo
Externí odkaz:
http://arxiv.org/abs/astro-ph/9804046
Autor:
Giebels, B., Bazer-Bachi, R., Bergeret, H., Cordier, A., Debiais, G., De Naurois, M., Dezalay, J. P., Dumora, D., Eschstruth, P., Espigat, P., Fabre, B., Fleury, P., Ghesquière, C., Herault, N., Malet, I., Merkel, B., Meynadier, C., Palatka, M., Paré, E., Procureur, J., Punch, M., Québert, J., Ragan, K., Rob, L., Schovanek, P., Smith, D. A., Vrana, J.
Publikováno v:
Nucl.Instrum.Meth. A412 (1998) 329-341
The CELESTE experiment will be an Atmospheric Cherenkov detector designed to bridge the gap in energy sensitivity between current satellite and ground-based gamma-ray telescopes, 20 to 300 GeV. We present test results made at the former solar power p
Externí odkaz:
http://arxiv.org/abs/astro-ph/9803198
Autor:
Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M., Debiais, G., Degrange, B., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Bohec, S. Le, Malet, I., Meynadier, C., Munz, P., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tavernet, J. P., Vrana, J.
The CAT Imaging Telescope has observed the BL Lac object Markarian 501 between March and August 1997. We report here on the variability over this time including several large flares. We present also preliminary spectra for all these data, for the low
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710259
Autor:
Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M., Debiais, G., Degrange, B., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Bohec, S. Le, Malet, I., Meynadier, C., Munz, P., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tavernet, J. P., Vrana, J.
The CAT imaging telesope, which uses the Atmospheric Cherenkov Technique to observe TeV gamma-ray sources, has been operating since September 1996. Located in southern France, it features a fine grained camera consisting of 546 PMT with a pixel size
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710260
Autor:
Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M., Debiais, G., Degrange, B., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Bohec, S. Le, Mallet, I., Meynadier, C., Munz, F., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tavernet, J. P., Vrana, J.
The CAT imaging telescope on the site on the former solar plant Themis has been observing gamma-rays from Mrk501 above 220 GeV in March and April 1997. This source is shown to be highly variable and the light curve is presented. The detected gamma-ra
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705249
Autor:
Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M., Debiais, G., Degrange, B., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Bohec, S. Le, Mallet, I., Meynadier, C., Munz, F., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tavernet, J. P., Vrana, J.
The VHE gamma-ray imaging telescope CAT started taking data in October 1996. Located at the Themis solar site in southern France, it features a 17.7 m^2 Davies-Cotton mirror equipped with 600 PMT camera at the focal plane. The mechanics and optics, t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705247
Autor:
Barrau, A., Bazer-Bachi, R., Cabot, H., Chounet, L. M., Debiais, G., Degrange, B., Dezalay, J. P., Djannati-Atai, A., Dumora, D., Espigat, P., Fabre, B., Fleury, P., Fontaine, G., George, R., Ghesquiere, C., Goret, P., Gouiffes, C., Grenier, I. A., Iacoucci, L., Bohec, S. Le, Mallet, I., Meynadier, C., Munz, F., Palfrey, T. A., Pare, E., Pons, Y., Punch, M., Quebert, J., Ragan, K., Renault, C., Rivoal, M., Rob, L., Schovanek, P., Smith, D., Tavernet, J. P., Vrana, J.
The CAT imaging telescope, recently built on the site of the former solar plant Themis (French Pyrenees), observed gamma-rays from the Crab nebula from October 1996 to March 1997. This steady source, often considered as the standard candle of very-hi
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705248