Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Guver, T."'
Autor:
Mancuso, G. C., Altamirano, D., Bult, P., Chenevez, J., Guillot, S., Guver, T., Jaisawal, G. K., Malacaria, C., Ng, M., Sanna, A., Strohmayer, T. E.
We report the discovery of millihertz quasi-periodic oscillations (mHz QPOs) from the neutron star (NS) low-mass X-ray binary 4U 1730--22 using the Neutron Star Interior Composition Explorer (NICER). After being inactive for almost 50 years, 4U 1730-
Externí odkaz:
http://arxiv.org/abs/2304.09935
Autor:
Younes, G., Baring, M. G., Harding, A. K., Enoto, T., Wadiasingh, Z., Pearlman, A. B., Ho, W. C. G., Guillot, S., Arzoumanian, Z., Borghese, A., Gendreau, K., Gogus, E., Guver, T., van der Horst, A. J., Hu, C. -P., Jaisawal, G. K., Kouveliotou, C., Lin, L., Majid, W. A.
Magnetars are a special subset of the isolated neutron star family, with X-ray and radio emission mainly powered by the decay of their immense magnetic fields. Many attributes of magnetars remain poorly understood: spin-down glitches or the sudden re
Externí odkaz:
http://arxiv.org/abs/2210.11518
Autor:
Younes, G., Lander, S. K., Baring, M. G., Enoto, T., Kouveliotou, C., Wadiasingh, Z., Ho, W., Harding, A. K., Arzoumanian, Z., Gendreau, K. C., Guver, T., Hu, C. -P., Malacaria, C., Ray, P. S., Strohmayer, T.
Magnetars, isolated neutron stars with magnetic field strengths typically $\gtrsim10^{14}$~G, exhibit distinctive months-long outburst epochs during which strong evolution of soft X-ray pulse profiles, along with nonthermal magnetospheric emission co
Externí odkaz:
http://arxiv.org/abs/2201.05517
Autor:
Younes, G., Hu, C. -P., Bansal, K., Ray, P. S., Pearlman, A. B., Kirsten, F., Wadiasingh, Z., Gogus, E., Baring, M. G., Enoto, T., Arzoumanian, Z., Gendreau, K. C., Kouveliotou, C., Guver, T., Harding, A. K., Majid, W. A., Blumer, H., Hessels, J. W. T., Gawronski, M. P., Bezrukovs, V., Orbidans, A.
We report on NICER X-ray monitoring of the magnetar SGR 1830-0645 covering 223 days following its October 2020 outburst, as well as Chandra and radio observations. We present the most accurate spin ephemerides of the source so far: $\nu=0.096008680(2
Externí odkaz:
http://arxiv.org/abs/2201.05504
Autor:
Yontan, T., Bilir, S., Bostanci, Z. F., Ak, T., Ak, S., Guver, T., Paunzen, E., Urgup, H., Celebi, M., Akti, B. A., Gokmen, S.
In this study, we carried out CCD UBV photometry of eight open clusters, ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1, Stock 21, and determined their reddening, metallicity, distance, age, and mass functions. We used new
Externí odkaz:
http://arxiv.org/abs/1909.00345
Autor:
Pandey, S. B., Hu, Y., Castro-Tirado, A. J., Pozanenko, A. S., Sánchez-Ramírez, R., Gorosabel, J., Guziy, 5 S., Jelinek, M., Tello, J. C., Jeong, S., Oates, S. R., Zhang, B. -B., Mazaeva, E. D., Volnova, A. A., Minaev, P. Yu., van Eerten, H. J., Caballero-García, M. D., Pérez-Ramírez, D., Bremer, M., Winters, J. -M., Park, I. H., Guelbenzu, A. Nicuesa, Klose, S., Moskvitin, A., Sokolov, V. V., Sonbas, E., Ayala, A., Cepa, J., Butler, N., Troja, E., Chernenko, A. M., Molkov, S. V., Volvach, A. E., Inasaridze, R. Ya., Egamberdiyev, Sh. A., Burkhonov, O., Reva, I. V., Polyakov, K. A., Matkin, A. A., Ivanov, A. L., Molotov, I., Guver, T., Watson, A. M., Kutyrev, A., Lee, W. H., Fox, O., Littlejohns, O., Cucchiara, A., Gonzalez, J., Richer, M. G., Román-Zúñiga, C. G., Tanvir, N. R., Bloom, J. S., Prochaska, J. X., Gehrels, N., Moseley, H., de Diego, J. A., Ramírez-Ruiz, E., Klunko, E. V., Fan, Y., Zhao, X., Bai, J., Wang, Ch., Xin, Y., Cui, Ch., Tungalag, N., Peng, Z. -K., Kumar, Amit, Gupta, Rahul, Aryan, Amar, Kumar, Brajesh, Volvach, L. N., Lamb, G. P., Valeev, A. F.
We investigate the prompt emission and the afterglow properties of short duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012-2015, observed by several multi-wavelength facilities including the GTC 10.4m telescope. Prompt
Externí odkaz:
http://arxiv.org/abs/1902.07900
Autor:
Bostanci, Z. F., Yontan, T., Bilir, S., Ak, T., Guver, T., Ak, S., Paunzen, E., Basaran, C. S., Vurgun, E., Akti, A. B., Celebi, M., Urgup, H.
In this study, we present CCD UBV photometry of poorly studied open star clusters, Dolidze 36, NGC 6728, NGC 6800, NGC 7209, and Platais 1, located in the first and second Galactic quadrants. Observations were obtained with T100, the 1-m telescope of
Externí odkaz:
http://arxiv.org/abs/1806.00947
Autor:
Bilir, S., Bostanci, Z. F., Yontan, T., Guver, T., Bakis, V., Ak, T., Ak, S., Paunzen, E., Eker, Z.
We present the results of CCD $UBV$ photometric and spectroscopic observations of the open cluster NGC 225. In order to determine the structural parameters of NGC 225, we calculated the stellar density profile in the cluster's field. We estimated the
Externí odkaz:
http://arxiv.org/abs/1606.08608
We present the results of CCD UBV observations of the open cluster NGC 6819. We calculated the stellar density profile in the cluster's field to determine the structural parameters of NGC 6819. Using the existing astrometric data, we calculated the p
Externí odkaz:
http://arxiv.org/abs/1603.00474
Autor:
Furniss, A., Noda, K., Boggs, S., Chiang, J., Christensen, F., Craig, W., Giommi, P ., Hailey, C., Harisson, F., Madejski, G., Nalewajko, K., Perri, M., Stern, D., Urry, M., Verrecchia, F., Zhang, W., Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Banerjee, B., Bangale, P., de Almeida, U. Barres, Barrio, J. A., Gonzalez, J. Becerra, Bednarek, W., Bernardini, E., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Chatterjee, A., Clavero, R., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., Wilhelmi, E. de Ona, Mendez, C. Delgado, Di Pierro, F., Prester, D. Dominis, Dorner, D., Doro, M., Einecke, S., Glawion, D. Eisenacher, Elsaesser, D., Fernandez-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Galindo, D., Lopez, R. J. Garcia, Garczarczyk, M., Terrats, D. Garrido, Gaug, M., Giammaria, P., Godinovic, N., Munoz, A. Gonzalez, Guberman, D., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kellermann, H., Kodani, K., Konno, Y., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Lorenz, E., Majumdar, P., Makariev, M., Mallot, K., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Miranda, J. M., Mirzoyan, R., Moralejo, A., Nakajima, D., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nievas, Nilsson, K., Nishijima, K., Orito, R., Overkemping, A., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Persic, M., Poutanen, J., Moroni, P. G. Prada, Prandini, E., Puljak, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Garcia, J. Rodriguez, Saito, T., Saito, K., Satalecka, K., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Steinbring, T., Strzys, M., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Thaele, J., Torres, D. F., Toyama, T., Treves, A., Verguilov, V., Vovk, I., Will, M., Zanin, R., Archer, A., Benbow, W., Bird, R., Biteau, J., Bugaev, V., Cardenzana, J. V, Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Dickinson, H. J., Dumm, J., Eisch, J. D., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H., Fortin, P., Fortson, L., Gerard, L., Gillanders, G. H., Griffin, S., Griffiths, S. T., Grube, J., Gyuk, G., Haakansson, N., Holder, J., Humensky, T. B., Johnson, C. A., Kaaret, P., Kertzman, M., Kieda, D., Krause, M., Krennrich, F., Lang, M. J., Lin, T. T. Y., Maier, G., McArthur, S., McCann, A., Meagher, K., Moriarty, P., Mukherjee, R., Nieto, D., de Bhroithe, A. O'Faolain, Ong, R. A., Park, N., Petry, D., Pohl, M., Popkow, A., Ragan, K., Ratliff, G., Reyes, L. C., Reynolds, P. T., Richards, G. T., Roache, E., Santander, M., Sembroski, G. H., Shahinyan, K., Staszak, D., Telezhinsky, I., Tucci, J. V., Tyler, J., Vassiliev, V. V., Wakely, S. P., Weiner, O. M., Weinstein, A., Wilhelm, A., Williams, D. A., Zitzer, B., Fuhrmann, O. Vince L., Angelakis, E., Karamanavis, V., Myserlis, I., Krichbaum, T. P., Zensus, J. A., Ungerechts, H., Sievers, A., Bachev, R., Bottcher, M., Chen, W. P., Damljanovic, G., Eswaraiah, C., Guver, T., Hovatta, T., Hughes, Z., Ibryamov, S. . I., Joner, M. D., Jordan, B., Jorstad, S. G., Joshi, M., Kataoka, J., Kurtanidze, O. M., Kurtanidze, S. O., Lahteenmaki, A., Latev, G., Lin, H. C., Larionov, V. M., Mokrushina, A. A., Morozova, D. A., Nikolashvili, M. G., Raiteri, C. M., Ramakrishnan, V., Readhead, A. C. R., Sadun, A. C., Sigua, L. A., Semkov, E. H., Strigachev, A., Tammi, J., Tornikoski, M., Troitsky, Y. V. Troitskaya I. S., Villata, M.
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby
Externí odkaz:
http://arxiv.org/abs/1509.04936