Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Younes, G. A."'
Autor:
Alford, J. A. J., Younes, G. A., Wadiasingh, Z., Abdelmaguid, M., An, H., Bachetti, M., Baring, M., Beloborodov, A., Chen, A. Y., Enoto, T., García, J. A., Gelfand, J. D., Gotthelf, E. V., Harding, A., Hu, C. -P., Jaodand, A. D., Kaspi, V., Kim, C., Kouveliotou, C., Kuiper, L., Mori, K., Nynka, M., Park, J., Stern, D., Valverde, J., Walton, D.
The hard X-ray emission from magnetars and other isolated neutron stars remains under-explored. An instrument with higher sensitivity to hard X-rays is critical to understanding the physics of neutron star magnetospheres and also the relationship bet
Externí odkaz:
http://arxiv.org/abs/2311.04739
Autor:
O'Connor, B., Gogus, E., Hare, J., Mukai, K., Huppenkothen, D., Brink, J., Buckley, D. A. H., Levan, A., Baring, M. G., Stewart, R., Kouveliotou, C., Woudt, P., Bellm, E., Cenko, S. B., Evans, P. A., Granot, J., Hailey, C., Harrison, F., Hartmann, D., van der Horst, A. J., Kaper, L., Kennea, J. A., Potter, S. B., Slane, P. O., Stern, D., Wijers, R. A. M. J., Younes, G.
Here, we present the results of our multi-wavelength campaign aimed at classifying \textit{Swift} J170800$-$402551.8 as part of the \textit{Swift} Deep Galactic Plane Survey (DGPS). We utilized Target of Opportunity (ToO) observations with \textit{Sw
Externí odkaz:
http://arxiv.org/abs/2307.13959
Autor:
O'Connor, B., Kouveliotou, C., Evans, P. A., Gorgone, N., van Kooten, A. J., Gagnon, S., Yang, H., Baring, M. G., Bellm, E., Beniamini, P., Brink, J., Buckley, D. A. H., Cenko, S. B., Egbo, O. D., Gogus, E., Granot, J., Hailey, C., Hare, J., Harrison, F., Hartmann, D., van der Horst, A. J., Huppenkothen, D., Kaper, L., Kargaltsev, O., Kennea, J. A., Mukai, K., Slane, P. O., Stern, D., Troja, E., Wadiasingh, Z., Wijers, R. A. M. J., Woudt, P., Younes, G.
The \textit{Swift} Deep Galactic Plane Survey is a \textit{Swift} Key Project consisting of 380 tiled pointings covering 40 deg$^{2}$ of the Galactic Plane between longitude $10$\,$<$\,$|l|$\,$<$\,$30$ deg and latitude $|b|$\,$<$\,$0.5$ deg. Each poi
Externí odkaz:
http://arxiv.org/abs/2306.14354
Autor:
Surnis, M. P., Rajwade, K. M., Stappers, B. W., Younes, G., Bezuidenhout, M. C., Caleb, M., Driessen, L. N., Jankowski, F., Malenta, M., Morello, V., Sanidas, S., Barr, E., Kramer, M., Fender, R., Woudt, P.
We report the serendipitous discovery of an extremely intermittent radio pulsar, PSR J1710-3452, with a relatively long spin period of 10.4 s. The object was discovered through the detection of 97 bright radio pulses in only one out of 66 epochs of o
Externí odkaz:
http://arxiv.org/abs/2306.10817
Autor:
O'Connor, B., Brink, J., Buckley, D. A. H., Mukai, K., Kouveliotou, C., Gogus, E., Potter, S. B., Woudt, P., Lien, A., Levan, A., Kargaltsev, O., Baring, M. G., Bellm, E., Cenko, S. B., Evans, P. A., Granot, J., Hailey, C., Harrison, F., Hartmann, D., van der Horst, A. J., Huppenkothen, D., Kaper, L., Kennea, J. A., Slane, P. O., Stern, D., Troja, E., Wijers, R. A. M. J., Younes, G.
We present the results of our X-ray, ultraviolet, and optical follow-up campaigns of 1RXS J165424.6-433758, an X-ray source detected with the \textit{Swift} Deep Galactic Plane Survey (DGPS). The source X-ray spectrum (\textit{Swift} and \textit{NuST
Externí odkaz:
http://arxiv.org/abs/2306.05576
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
Two recent discoveries, namely PSR J0901-4046 and GLEAM-X J162759.5-523504.3 (hereafter GLEAM-X J1627), have corroborated an extant population of radio-loud periodic sources with long periods (76 s and 1091 s respectively) whose emission can hardly b
Externí odkaz:
http://arxiv.org/abs/2210.09323
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: $\nu=0.096008680(2
Externí odkaz:
http://arxiv.org/abs/2201.05504
Autor:
O'Connor, B., Gogus, E., Huppenkothen, D., Kouveliotou, C., Gorgone, N., Townsend, L. J., Calamida, A., Fruchter, A., Buckley, D. A. H., Baring, M. G., Kennea, J. A., Younes, G., Arzoumanian, Z., Bellm, E., Cenko, S. B., Gendreau, K., Granot, J., Hailey, C., Harrison, F., Hartmann, D., Kaper, L., Kutyrev, A., Slane, P. O., Stern, D., Troja, E., van der Horst, A. J., Wijers, R. A. M. J., Woudt, P.
We report on observations of the candidate Be/X-ray binary IGR J18219$-$1347 with \textit{Swift}/XRT, \textit{NuSTAR}, and \textit{NICER} during Type-I outbursts in March and June 2020. Our timing analysis revealed the spin period of a neutron star w
Externí odkaz:
http://arxiv.org/abs/2111.12592