Zobrazeno 31 - 40
of 189
pro vyhledávání: '"García, J. A."'
Autor:
Marinucci, A., Muleri, F., Dovčiak, M., Bianchi, S., Marin, F., Matt, G., Ursini, F., Middei, R., Marshall, H. L., Baldini, L., Barnouin, T., Rodriguez, N. Cavero, De Rosa, A., Di Gesu, L., Harper, D., Ingram, A., Karas, V., Krawczynski, H., Madejski, G., Panagiotou, C., Petrucci, P. O., Podgorny, J., Puccetti, S., Tombesi, F., Veledina, A., Zhang, W., Agudo, I., Antonelli, L. A., Bachetti, M., Baumgartner, W. H., Bellazzini, R., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Capitanio, F., Castellano, S., Cavazzuti, E., Ciprini, S., Costa, E., Del Monte, E., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Garcia, J. A., Gunji, S., Hayashida, K., Heyl, J., Iwakiri, W., Jorstad, S. G., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marscher, A. P., Mitsuishi, I., Mizuno, T., Ng, C. -Y., O'Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Perri, M., Pesce-Rollins, M., Pilia, M., Possenti, A., Poutanen, J., Ramsey, B. D., Rankin, J., Ratheesh, A., Romani, R. W., Sgrò, C., Slane, P., Soffitta, P., Spandre, G., Tamagawa, T., Tavecchio, F., Taverna, R., Tawara, Y., Tennant, A. F., Thomas, N. E., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., Xie, F., Zane, S.
We report on the first observation of a radio-quiet Active Galactic Nucleus (AGN) using polarized X-rays: the Seyfert 1.9 galaxy MCG-05-23-16. This source was pointed with the Imaging X-ray Polarimetry Explorer (IXPE) starting on May 14, 2022 for a n
Externí odkaz:
http://arxiv.org/abs/2207.09338
Autor:
Mallick, L., Fabian, A. C., García, J. A., Tomsick, J. A., Parker, M. L., Dauser, T., Wilkins, D. R., De Marco, B., Steiner, J. F., Connors, R. M. T., Mastroserio, G., Markowitz, A. G., Pinto, C., Alston, W. N., Lohfink, A. M., Gandhi, P.
The standard alpha-disc model predicts an anti-correlation between the density of the inner accretion disc and the black hole mass times square of the accretion rate, as seen in higher mass ($M_{\rm BH}>10^{6} M_{\odot}$) active galactic nuclei (AGNs
Externí odkaz:
http://arxiv.org/abs/2203.04522
Autor:
Brumback, McKinley C., Grefenstette, B. W., Buisson, D. J. K., Bachetti, M., Connors, R., Garcia, J. A., Jaodand, A., Krivonos, R., Ludlam, R., Madsen, K. K., Mastroserio, G., Tomsick, J. A., Wik, D.
StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique additional data with which to monitor sources like X-ray binaries that show va
Externí odkaz:
http://arxiv.org/abs/2202.11261
Autor:
Ludlam, R. M., Cackett, E. M., García, J. A., Miller, J. M., Stevens, A. L., Fabian, A. C., Homan, J., NG, M., Guillot, S., Buisson, D. J. K., Chakrabarty, D.
We present a spectral analysis of NuSTAR and NICER observations of the luminous, persistently accreting neutron star (NS) low-mass X-ray binary Cygnus X-2. The data were divided into different branches that the source traces out on the Z-track of the
Externí odkaz:
http://arxiv.org/abs/2201.11767
Autor:
Walton, D. J., Balokovic, M., Fabian, A. C., Gallo, L. C., Koss, M., Nardini, E., Reynolds, C. S., Ricci, C., Stern, D., Alston, W. N., Dauser, T., Garcia, J. A., Kosec, P., Reynolds, M. T., Harrison, F. A., Miller, J. M.
We present the first high signal-to-noise broadband X-ray spectrum of the radio-quiet type-2 Seyfert ESO 033-G002, combining data from $XMM$-$Newton$ and $NuSTAR$. The nuclear X-ray spectrum is complex, showing evidence for both neutral and ionised a
Externí odkaz:
http://arxiv.org/abs/2107.10278
Autor:
Kilpatrick, Charles D., Coulter, David A., Arcavi, Iair, Brink, Thomas G., Dimitriadis, Georgios, Filippenko, Alexei V., Foley, Ryan J., Howell, D. Andrew, Jones, David O., Makler, Martin, Piro, Anthony L., Rojas-Bravo, César, Sand, David J., Swift, Jonathan J., Tucker, Douglas, Zheng, WeiKang, Allam, Sahar S., Annis, James T., Antilen, Juanita, Bachmann, Tristan G., Bloom, Joshua S., Bom, Clecio R., Bostroem, K. Azalee, Brout, Dillon, Burke, Jamison, Butler, Robert E., Butner, Melissa, Campillay, Abdo, Clever, Karoli E., Conselice, Christopher J., Cooke, Jeff, Dage, Kristen C., de Carvalho, Reinaldo R., de Jaeger, Thomas, Desai, Shantanu, Garcia, Alyssa, Garcia-Bellido, Juan, Gill, Mandeep S. S., Girish, Nachiket, Hallakoun, Na'ama, Herner, Kenneth, Hiramatsu, Daichi, Holz, Daniel E., Huber, Grace, Kawash, Adam M., McCully, Curtis, Medallon, Sophia A., Metzger, Brian D., Modak, Shaunak, Morgan, Robert, Muñoz, Ricardo R., Muñoz-Elgueta, Nahir, Murakami, Yukei S., E., Felipe Olivares, Palmese, Antonella, Patra, Kishore, Pereira, Maria E. S., Pessi, Thallis L., Pineda-Garcia, J., Quirola-Vásquez, Jonathan, Ramirez-Ruiz, Enrico, Rembold, Sandro Barboza, Rest, Armin, Rodríguez, Ósmar, Santana-Silva, Luidhy, Sherman, Nora F., Siebert, Matthew R., Smith, Carli, Smith, J. Allyn, Soares-Santos, Marcelle, Stacey, Holland, Stahl, Benjamin E., Strader, Jay, Strasburger, Erika, Sunseri, James, Tinyanont, Samaporn, Tucker, Brad E., Ulloa, Natalie, Valenti, Stefano, Vasylyev, Sergiy, Wiesner, Matthew P., Zhang, Keto D.
We present optical follow-up imaging obtained with the Katzman Automatic Imaging Telescope, Las Cumbres Observatory Global Telescope Network, Nickel Telescope, Swope Telescope, and Thacher Telescope of the LIGO/Virgo gravitational wave (GW) signal fr
Externí odkaz:
http://arxiv.org/abs/2106.06897
We present $^{56}$Ni mass estimates for 110 normal Type II supernovae (SNe II), computed here from their luminosity in the radioactive tail. This sample consists of SNe from the literature, with at least three photometric measurements in a single opt
Externí odkaz:
http://arxiv.org/abs/2105.03268
Autor:
Sokolova-Lapa, E., Gornostaev, M., Wilms, J., Ballhausen, R., Falkner, S., Postnov, K., Thalhammer, P., Fürst, F., García, J. A., Shakura, N., Becker, P. A., Wolff, M. T., Pottschmidt, K., Härer, L., Malacaria, C.
Publikováno v:
A&A 651, A12 (2021)
Recent observations of X-ray pulsars at low luminosities allow, for the first time, to compare theoretical models for the emission from highly magnetized neutron star atmospheres at low mass accretion rates ($\dot{M} \lesssim 10^{15}$ g s$^{-1}$) wit
Externí odkaz:
http://arxiv.org/abs/2104.06802
Autor:
Casadio, C., MacDonald, N. R., Boccardi, B., Jorstad, S. G., Marscher, A. P., Krichbaum, T. P., Hodgson, J. A., Kim, J-Y., Traianou, E., Weaver, Z. R., Garrido, M. Gómez, García, J. González, Kallunki, J., Lindqvist, M., Sánchez, S., Yang, J., Zensus, J. A.
Controversial studies on the jet collimation profile of BL Lacertae (BL Lac), the eponymous blazar of BL Lac objects class, complicate the scenario in this already puzzling class of objects. Understanding the jet geometry, in connection with the jet
Externí odkaz:
http://arxiv.org/abs/2102.08952
Autor:
Ludlam, R. M., Jaodand, A. D., García, J. A., Degenaar, N., Tomsick, J. A., Cackett, E. M., Fabian, A. C., Gandhi, P., Buisson, D. J. K., Shaw, A. W., Chakrabarty, D.
We present the first joint NuSTAR and NICER observations of the ultra-compact X-ray binary (UCXB) 4U 1543$-$624 obtained in 2020 April. The source was at a luminosity of $L_{0.5-50\ \mathrm{keV}} = 4.9 (D/7\ \mathrm{kpc})^{2}\times10^{36}$ ergs s$^{-
Externí odkaz:
http://arxiv.org/abs/2012.10461