Zobrazeno 1 - 10
of 111
pro vyhledávání: '"MATTOX, J. R."'
Autor:
Giroletti, M., Giovannini, G., Feretti, L., Cotton, W. D., Edwards, P. G., Lara, L., Marscher, A. P., Mattox, J. R., Piner, B. G., Venturi, T.
Publikováno v:
Astrophys.J.600:127-140,2004
We present the results of a high angular resolution study of the BL Lac object Markarian 501 in the radio band. We consider data taken at 14 different epochs, ranging between 1.6 GHz and 22 GHz in frequency, and including new Space VLBI observations
Externí odkaz:
http://arxiv.org/abs/astro-ph/0309285
Publikováno v:
Astrophys.J.588:155-164,2003
We report EGRET upper limits on the high-energy gamma-ray emission from clusters of galaxies. EGRET observations between 1991 and 2000 were analyzed at positions of 58 individual clusters from a flux-limited sample of nearby X-ray bright galaxy clust
Externí odkaz:
http://arxiv.org/abs/astro-ph/0301362
Publikováno v:
Astrophys.J. 578 (2002) 935-942
We present the results of deep X-ray and gamma-ray observations of the Geminga pulsar obtained in the final years of the ASCA and CGRO missions, and an upper limit from RXTE. A phase-connected ephemeris from the gamma-rays is derived that spans the y
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207001
Autor:
Raiteri, C. M., Villata, M., Aller, H. D., Aller, M. F., Heidt, J., Kurtanidze, O. M., Lanteri, L., Maesano, M., Massaro, E., Montagni, F., Nesci, R., Nilsson, K., Nikolashvili, M. G., Nurmi, P., Ostorero, L., Pursimo, T., Rekola, R., Sillanpaa, A., Takalo, L. O., Terasranta, H., Tosti, G., Balonek, T. J., Feldt, M., McGrath, E. J., Heines, A., Heisler, C., Hu, J., Kidger, M., Mattox, J. R., Pati, A., Robb, R., Sadun, A. C., Shastri, P., Wagner, S. J., Wei, J., Wu, X.
New optical and radio data on the BL Lacertae object AO 0235+16 have been collected in the last four years by a wide international collaboration, which confirm the intense activity of this source. The optical data also include the results of the Whol
Externí odkaz:
http://arxiv.org/abs/astro-ph/0108165
Autor:
Tanihata, C., Takahashi, T., Kataoka, J., Madejski, G. M., Inoue, S., Kubo, H., Makino, F., Mattox, J. R., Kawai, N.
We report the variable X-ray emission from BL Lacertae detected in the ASCA ToO observation conducted during the EGRET and RXTE pointings, coincident with the 1997 July outburst. The source showed a historically high state of X-ray, optical, and gamm
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006195
Autor:
Mattox, J. R.
Because of the scheduled GLAST mission by NASA, there is strong scientific justification for preparation for very extensive blazar monitoring in the optical bands to exploit the opportunity to learn about blazars through the correlation of variabilit
Externí odkaz:
http://arxiv.org/abs/astro-ph/9911014
Autor:
Kataoka, J., Mattox, J. R., Quinn, J., Kubo, H., Makino, F., Takahashi, T., Inoue, S., Hartman, R. C., Madejski, G. M., Sreekumar, P., Wagner, S. J.
We present the results of a multiwavelength campaign for Mrk 501 performed in March 1996 with ASCA, EGRET, Whipple, and optical telescopes. In the X-ray band, a spectral break was observed around 2 keV. We report here for the first time the detection
Externí odkaz:
http://arxiv.org/abs/astro-ph/9811014
Autor:
Tavani, M., Mukherjee, R., Mattox, J. R., Halpern, J., Thompson, D. J., Kanbach, G., Hermsen, W., Zhang, S. N., Foster, R. S.
We report the discovery of a remarkable gamma-ray transient source near the Galactic plane, GRO J1838-04. This source was serendipitously discovered by EGRET in June 1995 with a peak intensity of 4 E(-6) ph/cm/cm/s (for photon energies larger than 10
Externí odkaz:
http://arxiv.org/abs/astro-ph/9702053
We present a method to assess the reliability of the identification of EGRET sources with extragalactic radio sources. We verify that EGRET is detecting the blazar class of AGN. However, many published identifications are found to be questionable. We
Externí odkaz:
http://arxiv.org/abs/astro-ph/9612187
Autor:
Tavani, M., Hermsen, W., van Dijk, R., Strickman, M., Zhang, S. N., Foster, R. S., Ray, P. S., Mattox, J. R., Ulmer, M., Purcell, W., Coe, M.
We report the results of a CGRO multi-instrument series of observations of the unidentified gamma-ray source 2CG 135+1 and of its possible counterpart, the peculiar radio source GT 0236+610 coincident with the Be star LSI+61 303. We monitored the tim
Externí odkaz:
http://arxiv.org/abs/astro-ph/9611200