Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Walid A Majid"'
Autor:
Po-Ting Chen, David S. Bayard, Robert F. Sharrow, Walid A. Majid, Benjamin A. Dunst, Jason L. Speyer
Publikováno v:
IEEE Transactions on Control Systems Technology. :1-16
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b99008eeb4bd26da879b196f7457a11a
https://doi.org/10.1109/tcst.2023.3265606
https://doi.org/10.1109/tcst.2023.3265606
Autor:
Karishma Bansal, Robert S Wharton, Aaron B Pearlman, Walid A Majid, Thomas A Prince, George Younes, Chin-Ping Hu, Teruaki Enoto, Jonathon Kocz, Shinji Horiuchi
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
Swift J1818.0−1607 is a radio-emitting magnetar that was discovered in X-ray outburst in March 2020. Starting four days after this outburst, we began a nearly five month multi-frequency observing campaign at 2.2, 8.4, and 32 GHz using telescopes in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42999b274748761b131f7695003b61a6
https://doi.org/10.1093/mnras/stad1520
https://doi.org/10.1093/mnras/stad1520
Publikováno v:
Advances in Astronomy, Vol 2019 (2019)
The Deep Space Network (DSN) is a worldwide array of radio telescopes which supports NASA’s interplanetary spacecraft missions. When the DSN antennas are not communicating with spacecraft, they provide a valuable resource for performing observation
Externí odkaz:
https://doaj.org/article/16a1427562ac4c16b95706f8ed5cbadb
Autor:
Gaurava K. Jaisawal, Keith C. Gendreau, Alice K. Harding, Chin-Ping Hu, George Younes, Beverly LaMarr, Lin Lin, Teruaki Enoto, J. Pope, Matthew G. Baring, Zaven Arzoumanian, Wynn C. G. Ho, Yuki Kaneko, James F. Steiner, Ersin Gogus, Zorawar Wadiasingh, J. Doty, Takashi Okajima, Walid A. Majid, Tolga Guver, Chryssa Kouveliotou, M. Saylor, Paul S. Ray, A. J. van der Horst, Sebastien Guillot, Oliver J. Roberts
Publikováno v:
Younes, G, Baring, M G, Kouveliotou, C, Arzoumanian, Z, Enoto, T, Doty, J, Gendreau, K C, Göğüş, E, Guillot, S, Güver, T, Harding, A K, Ho, W C G, van der Horst, A J, Jaisawal, G K, Kaneko, Y, LaMarr, B J, Lin, L, Majid, W, Okajima, T, Pope, J, Ray, P S, Roberts, O J, Saylor, M, Steiner, J F & Wadiasingh, Z 2021, ' Broadband X-ray burst spectroscopy of the fast-radio-burst-emitting Galactic magnetar ', Nature Astronomy, vol. 5, pp. 408-413 . https://doi.org/10.1038/s41550-020-01292-x
Nature Astron.
Nature Astron., 2021, 5 (4), pp.408-413. ⟨10.1038/s41550-020-01292-x⟩
Nature Astron.
Nature Astron., 2021, 5 (4), pp.408-413. ⟨10.1038/s41550-020-01292-x⟩
Magnetars are young, magnetically powered neutron stars that possess the strongest magnetic fields in the Universe. Fast radio bursts (FRBs) are extremely intense millisecond-long radio pulses of primarily extragalactic origin, and a leading attribut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::123e0bb63aa2fe6cba987fe4b0bb407c
https://doi.org/10.1038/s41550-020-01292-x
https://doi.org/10.1038/s41550-020-01292-x
Autor:
Kevin B. Burdge, Thomas R. Marsh, Jim Fuller, Eric C. Bellm, Ilaria Caiazzo, Deepto Chakrabarty, Michael W. Coughlin, Kishalay De, V. S. Dhillon, Matthew J. Graham, Pablo Rodríguez-Gil, Amruta D. Jaodand, David L. Kaplan, Erin Kara, Albert K. H. Kong, S. R. Kulkarni, Kwan-Lok Li, S. P. Littlefair, Walid A. Majid, Przemek Mróz, Aaron B. Pearlman, E. S. Phinney, Jan van Roestel, Robert A. Simcoe, Igor Andreoni, Andrew J. Drake, Richard G. Dekany, Dmitry A. Duev, Erik C. Kool, Ashish A. Mahabal, Michael S. Medford, Reed Riddle, Thomas A. Prince
Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original "black widow", the 8-hour orbital period eclipsing pulsar PSR J1959+2048 (PSR B1957+20), high energy emission originating from the pulsar is ir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a602a3542eed06c32003c95c04150397
https://resolver.caltech.edu/CaltechAUTHORS:20220505-812251500
https://resolver.caltech.edu/CaltechAUTHORS:20220505-812251500
Autor:
George Younes, Chin-Ping Hu, Karishma Bansal, Paul S. Ray, Aaron B. Pearlman, Franz Kirsten, Zorawar Wadiasingh, Ersin Göğüş, Matthew G. Baring, Teruaki Enoto, Zaven Arzoumanian, Keith C. Gendreau, Chryssa Kouveliotou, Tolga Güver, Alice K. Harding, Walid A. Majid, Harsha Blumer, Jason W. T. Hessels, Marcin P. Gawroński, Vladislavs Bezrukovs, Arturs Orbidans
Publikováno v:
Astrophysical Journal, 924(2):136. IOP Publishing Ltd.
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd1bf9d1ae35d2a0bd611d4317cfacdf
https://resolver.caltech.edu/CaltechAUTHORS:20220119-558563000
https://resolver.caltech.edu/CaltechAUTHORS:20220119-558563000
Publikováno v:
The Journal of the Astronautical Sciences. 67:704-739
This paper investigates the performance of pulsar-based navigation in deep space mission applications. The noise properties of X-ray based and radio-baspulsar measurements are examined and compared. A closed form parametric covariance analysis tool w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776000e9886956ba594f448d960508a1
https://doi.org/10.1007/s40295-019-00209-9
https://doi.org/10.1007/s40295-019-00209-9
Publikováno v:
Journal of Guidance, Control, and Dynamics. 43:60-72
This paper discusses the observability analysis, the estimation algorithm, the numerical simulation, and the experimental verification of a pulsar-based positioning system. This positioning system ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c2438dcda72d6797e15a758a593fbaa
https://doi.org/10.2514/1.g003722
https://doi.org/10.2514/1.g003722
Publikováno v:
NAVIGATION. 66:621-632
This paper discusses the use of a pulsar signal in clock calibration. The analysis method is presented from the perspective of filtering theory, where Hadamard variance is used to analyze the frequency stability of both the stand-alone and the pulsar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4d897f7cf1314a48310caa1b09e251d
https://doi.org/10.1002/navi.325
https://doi.org/10.1002/navi.325
Autor:
Liam Connor, Robert Wharton, Walid A. Majid, Thomas A. Prince, Shriharsh P. Tendulkar, Aaron B. Pearlman, Karishma Bansal, Mohit Bhardwaj, Charles J. Naudet
We present the detection of a bright radio burst at radio frequencies between 2.2--2.3 GHz with the NASA Deep Space Network (DSN) 70 m dish (DSS-63) in Madrid, Spain from FRB~20200120E. This repeating fast radio burst (FRB) was recently discovered by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::862afeca62cc57b2375fa4ff718ed93a
http://arxiv.org/abs/2105.10987
http://arxiv.org/abs/2105.10987