A second view on the X-ray polarization of NGC 4151 with IXPE

Autor: Gianolli, V. E., Bianchi, S., Kammoun, E., Gnarini, A., Marinucci, A., Ursini, F., Parra, M., Tortosa, A., De Rosa, A., Kim, D. E., Marin, F., Matt, G., Serafinelli, R., Soffitta, P., Tagliacozzo, D., Di Gesu, L., Done, C., Marshall, H. L., Middei, R., Mikusincova, R., Petrucci, P-O., Ravi, S., Svoboda, J., Tombesi, F.

Publikováno v: A&A 691, A29 (2024)

We report on the second observing program of the active galactic nucleus NGC 4151 with simultaneous Imaging X-ray Polarimetry Explorer (IXPE; {\sim}750 ks), NuSTAR ({\sim}60 ks), XMM-Newton ({\sim}75 ks), and NICER ({\sim}65 ks) pointings. NGC 4151 i

Externí odkaz: http://arxiv.org/abs/2407.17243

IXPE observation confirms a high spin in the accreting black hole 4U 1957+115

Autor: Marra, L., Brigitte, M., Cavero, N. Rodriguez, Chun, S., Steiner, J. F., Dovčiak, M., Nowak, M., Bianchi, S., Capitanio, F., Ingram, A., Matt, G., Muleri, F., Podgorný, J., Poutanen, J., Svoboda, J., Taverna, R., Ursini, F., Veledina, A., De Rosa, A., Garcia, J. A., Lutovinov, A. A., Mereminskiy, I. A., Farinelli, R., Gunji, S., Kaaret, P., Kallman, T., Krawczynski, H., Kan, Y., Hu, K., Marinucci, A., Mastroserio, G., Mikušincová, R., Parra, M., Petrucci, P. O., Ratheesh, A., Soffitta, P., Tombesi, F., Zane, S., Agudo, I., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Castellano, S., Cavazzuti, E., Chen, C., Ciprini, S., Costa, E., Del Monte, E., Di Gesu, L., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Hayashida, K., Heyl, J., Iwakiri, W., Jorstad, S. G., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marin, F., Marscher, A. P., Marshall, H. L., Massaro, F., Mitsuishi, I., Mizuno, T., Negro, M., 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., Puccetti, S., Ramsey, B. D., Rankin, J., Roberts, O. J., Romani, R. W., Sgro, C., Slane, P., Spandre, G., Swartz, D. A., Tamagawa, T., Tavecchio, F., Tawara, Y., Tennant, A. F., Thomas, N. E., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., Xie, F.

We present the results of the first X-ray polarimetric observation of the low-mass X-ray binary 4U 1957+115, performed with the Imaging X-ray Polarimetry Explorer in May 2023. The binary system has been in a high-soft spectral state since its discove

Externí odkaz: http://arxiv.org/abs/2310.11125

New Bayesian method for estimation of Value at Risk and Conditional Value at Risk

Autor: Martín, Jacinto, Parra, M. Isabel, Sanjuán, Eva L., Pizarro, Mario M.

Value at Risk (VaR) and Conditional Value at Risk (CVaR) have become the most popular measures of market risk in Financial and Insurance fields. However, the estimation of both risk measures is challenging, because it requires the knowledge of the ta

Externí odkaz: http://arxiv.org/abs/2306.12202

SKA Science Data Challenge 2: analysis and results

Autor: Hartley, P., Bonaldi, A., Braun, R., Aditya, J. N. H. S., Aicardi, S., Alegre, L., Chakraborty, A., Chen, X., Choudhuri, S., Clarke, A. O., Coles, J., Collinson, J. S., Cornu, D., Darriba, L., Veneri, M. Delli, Forbrich, J., Fraga, B., Galan, A., Garrido, J., Gubanov, F., Håkansson, H., Hardcastle, M. J., Heneka, C., Herranz, D., Hess, K. M., Jagannath, M., Jaiswal, S., Jurek, R. J., Korber, D., Kitaeff, S., Kleiner, D., Lao, B., Lu, X., Mazumder, A., Moldón, J., Mondal, R., Ni, S., Önnheim, M., Parra, M., Patra, N., Peel, A., Salomé, P., Sánchez-Expósito, S., Sargent, M., Semelin, B., Serra, P., Shaw, A. K., Shen, A. X., Sjöberg, A., Smith, L., Soroka, A., Stolyarov, V., Tolley, E., Toribio, M. C., van der Hulst, J. M., Sadr, A. Vafaei, Verdes-Montenegro, L., Westmeier, T., Yu, K., Yu, L., Zhang, L., Zhang, X., Zhang, Y., Alberdi, A., Ashdown, M., Bom, C. R., Brüggen, M., Cannon, J., Chen, R., Combes, F., Conway, J., Courbin, F., Ding, J., Fourestey, G., Freundlich, J., Gao, L., Gheller, C., Guo, Q., Gustavsson, E., Jirstrand, M., Jones, M. G., Józsa, G., Kamphuis, P., Kneib, J. -P., Lindqvist, M., Liu, B., Liu, Y., Mao, Y., Marchal, A., Márquez, I., Meshcheryakov, A., Olberg, M., Oozeer, N., Pandey-Pommier, M., Pei, W., Peng, B., Sabater, J., Sorgho, A., Starck, J. L., Tasse, C., Wang, A., Wang, Y., Xi, H., Yang, X., Zhang, H., Zhang, J., Zhao, M., Zuo, S.

The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application

Externí odkaz: http://arxiv.org/abs/2303.07943

Cretaceous extensional and contractional stages in the Colombian Andes unraveled by a source-to-sink geochronological and thermochronological study in the Upper Magdalena Basin

Autor: Calderon-Diaz, L., Zapata, S., Cardona, A., Parra, M., Sobel, E.R., Patiño, A.M., Valencia, V., Jaramillo-Rios, J.S., Glodny, J.

Publikováno v: In Tectonophysics 10 May 2024 878