Zobrazeno 1 - 10
of 323
pro vyhledávání: '"Shrader C"'
Publikováno v:
ApJ Letters, 2024, vol. 961, article ID L1
We measured the dipole of the diffuse $\gamma$-ray background (DGB) identifying a highly significant time-independent signal coincidental with that of the Pierre Auger UHECR. The DGB dipole is determined from flux maps in narrow energy bands construc
Externí odkaz:
http://arxiv.org/abs/2401.04564
Autor:
Ojha, R., Zhang, H., Kadler, M., Neilson, N. K., Kreter, M., McEnery, J., Buson, S., Caputo, R., Coppi, P., D'Ammando, F., De Angelis, A., Fang, K., Giannios, D., Guiriec, S., Guo, F., Kopp, J., Krauss, F., Li, H., Meyer, M., Moiseev, A., Petropoulou, M., Prescod-Weinstein, C., Rani, B., Shrader, C., Venters, T., Wadiasingh, Z.
The possible association of the blazar TXS 0506+056 with a high-energy neutrino detected by IceCube holds the tantalizing potential to answer three astrophysical questions: 1. Where do high-energy neutrinos originate? 2. Where are cosmic rays produce
Externí odkaz:
http://arxiv.org/abs/1903.05765
Autor:
Rani, B., Zhang, H., Hunter, S. D., Kislat, F., Böttcher, M., McEnery, J. E., Thompson, D. J., Giannios, D., Guo, F., Li, H., Baring, M., Agudo, I., Buson, S., Petropoulou, M., Pavlidou, V., Angelakis, E., Myserlis, I., Wadiasingh, Z., da Silva, R. M. Curado, Kilian, P., Guiriec, S., Bozhilov, V. V., Hodgson, J., Antón, S., Kazanas, D., Coppi, P., Venters, T., Longo, F., Bottacini, E., Ojha, R., Zhang, B., Ciprini, S., Moiseev, A., Shrader, C.
The constantly improving sensitivity of ground-based and space-borne observatories has made possible the detection of high-energy emission (X-rays and gamma-rays) from several thousands of extragalactic sources. Enormous progress has been made in mea
Externí odkaz:
http://arxiv.org/abs/1903.04607
Autor:
Rani, B., Petropoulou, M., Zhang, H., D'Ammando, F., Finke, J., Baring, M., Böttcher, M., Dimitrakoudis, S., Gan, Z., Giannios, D., Hartmann, D. H., Krichbaum, T. P., Marscher, A. P., Mastichiadis, A., Nalewajko, K., Ojha, R., Paneque, D., Shrader, C., Sironi, L., Tchekhovskoy, A., Thompson, D. J., Vlahakis, N., Venters, T. M.
Active galactic nuclei (AGN) with relativistic jets, powered by gas accretion onto their central supermassive black hole (SMBH), are unique laboratories for studying the physics of matter and elementary particles in extreme conditions that cannot be
Externí odkaz:
http://arxiv.org/abs/1903.04504
Akademický článek
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Akademický článek
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We present the results of a broad-band X-ray study of the enigmatic Be star Gamma Cassiopeiae (herein gamma Cas) based on observations made with both the Suzaku and INTEGRAL observatories. gamma Cas has long been recognized as the prototypical exampl
Externí odkaz:
http://arxiv.org/abs/1410.4050
Autor:
Soldi, S., Beckmann, V., Baumgartner, W. H., Ponti, G., Shrader, C. R., Lubinski, P., Krimm, H. A., Mattana, F., Tueller, J.
Variability at all observed wavelengths is a distinctive property of AGN. Hard X-rays provide us with a view of the innermost regions of AGN, mostly unbiased by absorption along the line of sight. Swift/BAT offers the unique opportunity to follow, on
Externí odkaz:
http://arxiv.org/abs/1311.4164
Autor:
Kühnel, M., Müller, S., Kreykenbohm, I., Fürst, F., Pottschmidt, K., Rothschild, R. E., Caballero, I., Grinberg, V., Schönherr, G., Shrader, C., Klochkov, D., Staubert, R., Ferrigno, C., Torrejón, J. -M., Martínez-Núñez, S., Wilms, J.
A study of archival RXTE, Swift, and Suzaku pointed observations of the transient high mass X-ray binary GRO J1008-57 is presented. A new orbital ephemeris based on pulse arrival timing shows times of maximum luminosities during outbursts of GRO J100
Externí odkaz:
http://arxiv.org/abs/1305.2936
Autor:
Shrader, C. R., Macomb, D. J.
We describe an ongoing effort using the Fermi Large Area Telescope to search for gamma-ray emission from a source sample derived from published surveys of variable or transient galactic radio sources.
Comment: 2012 Fermi Symposium proceedings -
Comment: 2012 Fermi Symposium proceedings -
Externí odkaz:
http://arxiv.org/abs/1303.1053