Results 11 to 20 of about 166,732 (180)

The near ultraviolet transient surveyor (NUTS): An ultraviolet telescope to observe variable sources [PDF]

Experimental astronomy (Print), 2022
Observing the ultraviolet (UV) sky for time-varyiable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space.
S. Ambily, Mayuresh Sarpotdar, Joice Mathew, Binukumar G. Nair, A. G. Sreejith, K. Nirmal, Jayant Murthy, Margarita Safonova, R. Mohan, Vinod Kumar Aggarval, S. Nagabhushanam, Sachin Jeeragal   +11 more
openalex   +3 more sources

Statistical Study of Ejections in Coronal Hole Regions As Possible Sources of Solar Wind Switchbacks and Small-scale Magnetic Flux Ropes

The Astrophysical Journal Letters, 2023
The omnipresence of transient fluctuations in the solar wind, such as switchbacks (SBs) and small-scale magnetic flux ropes (SMFRs), have been well observed by the in situ observation of Parker Solar Probe (PSP), yet their sources are not clear. Possible
Nengyi Huang, Sophia D’Anna, Haimin Wang   +2 more
doaj   +2 more sources

Ultraviolet and X-ray Light-Curves of Novae Observed by the Neil Gehrels Swift Observatory [PDF]

Universe, 2022
With rapid response capabilities, and a daily planning of its observing schedule, the Neil Gehrels Swift Observatory is ideal for monitoring transient and variable sources.
Kim L. Page, N. Paul M. Kuin, Julian P. Osborne   +2 more
doaj   +2 more sources

ULTRASAT: A Wide-field Time-domain UV Space Telescope [PDF]

The Astrophysical Journal, 2023
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly large field of view (204 deg ^2 ) and near-ultraviolet (NUV; 230–290 nm) sensitivity ...
Y. Shvartzvald, E. Waxman, A. Gal-Yam, E. O. Ofek, S. Ben-Ami, D. Berge, M. Kowalski, R. Bühler, S. Worm, J. E. Rhoads, I. Arcavi, D. Maoz, D. Polishook, N. Stone, B. Trakhtenbrot, M. Ackermann, O. Aharonson, O. Birnholtz, D. Chelouche, D. Guetta, N. Hallakoun, A. Horesh, D. Kushnir, T. Mazeh, J. Nordin, A. Ofir, S. Ohm, D. Parsons, A. Pe’er, H. B. Perets, V. Perdelwitz, D. Poznanski, I. Sadeh, I. Sagiv, S. Shahaf, M. Soumagnac, L. Tal-Or, J. Van Santen, B. Zackay, O. Guttman, P. Rekhi, A. Townsend, A. Weinstein, I. Wold   +43 more
doaj   +2 more sources

The scientific payload of the Ultraviolet Transient Astronomy Satellite (ULTRASAT) [PDF]

Astronomical Telescopes + Instrumentation, 2022
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is a space-borne near UV telescope with an unprecedented large field of view (200 deg2 ). The mission, led by the Weizmann Institute of Science and the Israel Space Agency in collaboration with ...
S. Ben-Ami, Y. Shvartzvald, E. Waxman, Udi Netzer, Yoram Yaniv, Viktor M. Algranatti, A. Gal-yam, Ofer Lapid, E. Ofek, J. Topaz, I. Arcavi, Arooj Asif, Shlomi Azaria, Eran Bahalul, M. Barschke, Benjamin Bastian-Querner, D. Berge, Vlad D. Berlea, Rolf Buehler, L. Dittmar, Anatoly Gelman, G. Giavitto, O. Guttman, Juan M. Haces Crespo, D. Heilbrunn, Arik Kachergincky, Nirmal Kaipachery, M. Kowalski, S. Kulkarni, Shashank Kumar, D. Küsters, T. Liran, Yonit Miron-Salomon, Z. Mor, A. Nir, Gadi Nitzan, S. Philipp, A. Porelli, I. Sagiv, J. Schliwinski, T. Sprecher, N. De Simone, N. Stern, N. Stone, B. Trakhtenbrot, M. Vasilev, J. J. Watson, F. Zappon   +47 more
semanticscholar   +1 more source

High-sensitivity extreme-ultraviolet transient absorption spectroscopy enabled by machine learning. [PDF]

Optics Express, 2023
We present a novel denoising scheme for spectroscopy experiments employing broadband light sources and demonstrate its capabilities using transient absorption measurements with a high-harmonic source.
Tobias Heinrich, Hung-Tzu Chang, S. Zayko, M. Sivis, C. Ropers   +4 more
semanticscholar   +1 more source

Efficient low-density grating setup for monochromatization of XUV ultrafast light sources. [PDF]

Optics Express, 2022
Ultrafast light sources have become an indispensable tool to access and understand transient phenomenon in material science. However, a simple and easy-to-implement method for harmonic selection, with high transmission efficiency and pulse duration ...
Qi-cun Guo, M. Dendzik, M. Berntsen, Antonija Grubišić-Čabo, Congwu Li, Wan-Ting Chen, Yang Wang, O. Tjernberg   +7 more
semanticscholar   +1 more source

Decontaminating Swift UVOT Grism Observations of Transient Sources [PDF]

, 2015
We present a new technique of decontaminating Swift Ultraviolet/Optical Telescope grism spectra for transient objects. We describe the template image requirements and image processing steps necessary to successfully implement the empirical ...
M. Smitka, P. Brown, P. Kuin, N. Suntzeff   +3 more
semanticscholar   +1 more source

A soft and transient ultraluminous X-ray source with six-hour modulation in the NGC\,300 galaxy

Astronomy & Astrophysics, 2023
We investigate the nature of CXOU\,J005440.5-374320 ( a peculiar bright ($ and soft X-ray transient in the spiral galaxy NGC\,300 with a six-hour periodic flux modulation that was detected in a 2014 observation.
A. Sacchi, P. Esposito, D. de Martino, R. Soria, G. Israel, C. A. A. \ Sander, L. Sidoli, D. Buckley, I. Monageng, A. Tiengo, M. Arca Sedda, C. Pinto, R. Di Stefano, M. Imbrogno, A. Carleo, G. Rivolta   +15 more
semanticscholar   +1 more source

Capturing transient plasma flows and jets in the solar corona [PDF]

Astronomy & Astrophysics, 2021
Intensity bursts in ultraviolet (UV) to X-ray wavelengths and plasma jets are typical signatures of magnetic reconnection and the associated impulsive heating of the solar atmospheric plasma.
L. P. Chitta, S. Solanki, H. Peter, R. A. Cuadrado, L. Teriaca, U. Schuhle, F. Auchère, D. Berghmans, E. Kraaikamp, S. Gissot, C. Verbeeck   +10 more
semanticscholar   +1 more source