Results 1 to 10 of about 70,958 (245)

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

Experimental Astronomy, 2022
Observing the ultraviolet (UV) sky for time-variable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space. The Near Ultraviolet Transient Surveyor (NUTS) is a wide-field ($3^\circ$) imager with a photon-counting detector in the near-UV (NUV, 200-300 nm), to be flown on an upcoming ...
Ambily, S., Sarpotdar, Mayuresh, Nagabhushanam, S., Jeeragal, Sachin, Mathew, Joice, Nair, Binukumar G., Sreejith, A. G., Nirmal, K., Murthy, Jayant, Safonova, Margarita, Mohan, Rekhesh, Aggarval, Vinod Kumar   +11 more
openaire   +3 more sources

A Swift Response to Newly Discovered, Nearby Transients

Universe, 2023
The Neil Gehrels Swift Observatory has proven to be an extraordinary supernova (SN) observatory. The clearest application of Swift’s unique strengths is obtaining very early UV and X-ray data of young SNe, which enables robust constraints on their ...
Peter J. Brown, Macie Robertson, Yaswant Devarakonda, Emily Sarria, David Pooley, Maximilian D. Stritzinger   +5 more
doaj   +1 more source

Searching EUVE Data for Transient/Flaring Extreme Ultraviolet Sources [PDF]

International Astronomical Union Colloquium, 1996
The Extreme Ultraviolet Explorer (EUVE), because of its sky survey strategy, performed two observations of each point along a 180° by 1° strip of the ecliptic during the initial survey phase of the mission. One observation used the deep survey telescope, and another, 90 days earlier or later, used the all sky scanner telescopes, two of which have a ...
J. Lewis, S. Bowyer, M. Lampton, X. Wu, M. Mathioudakis   +4 more
openaire   +1 more source

Live to Die Another Day: The Rebrightening of AT 2018fyk as a Repeating Partial Tidal Disruption Event

The Astrophysical Journal Letters, 2023
Stars that interact with supermassive black holes (SMBHs) can be either completely or partially destroyed by tides. In a partial tidal disruption event (TDE), the high-density core of the star remains intact, and the low-density outer envelope of the ...
T. Wevers, E. R. Coughlin, D. R. Pasham, M. Guolo, Y. Sun, S. Wen, P. G. Jonker, A. Zabludoff, A. Malyali, R. Arcodia, Z. Liu, A. Merloni, A. Rau, I. Grotova, P. Short, Z. Cao   +15 more
doaj   +1 more source

SN 2022acko: The First Early Far-ultraviolet Spectra of a Type IIP Supernova

The Astrophysical Journal Letters, 2023
We present five far- and near-ultraviolet spectra of the Type II plateau supernova, SN 2022acko, obtained 5, 6, 7, 19, and 21 days after explosion, all observed with the Hubble Space Telescope/Space Telescope Imaging Spectrograph.
K. Azalee Bostroem, Luc Dessart, D. John Hillier, Michael Lundquist, Jennifer E. Andrews, David J. Sand, Yize Dong, Stefano Valenti, Joshua Haislip, Emily T. Hoang, Griffin Hosseinzadeh, Daryl Janzen, Jacob E. Jencson, Saurabh W. Jha, Vladimir Kouprianov, Jeniveve Pearson, Nicolas E. Meza Retamal, Daniel E. Reichart, Manisha Shrestha, Christopher Ashall, E. Baron, Peter J. Brown, James M. DerKacy, Joseph Farah, Lluís Galbany, J. I. González Hernández, Elizabeth Green, Peter Hoeflich, D. Andrew Howell, Lindsey A. Kwok, Curtis McCully, Tomás E. Müller-Bravo, Megan Newsome, Estefania Padilla Gonzalez, Craig Pellegrino, Jeonghee Rho, Micalyn Rowe, Michaela Schwab, Melissa Shahbandeh, Nathan Smith, Jay Strader, Giacomo Terreran, Schuyler D. Van Dyk, Samuel Wyatt   +43 more
doaj   +1 more source

Hubble Space Telescope and Ground-Based Optical and Ultraviolet Observations of GRB010222 [PDF]

, 2003
We report on Hubble Space Telescope WFPC2 optical and STIS near ultraviolet MAMA observations, and ground-based optical observations of GRB010222, spanning 15 hrs to 71 days.
A. Gal‐Yam, Bhattacharya D., Cowsik R., D. A. Frail, D. Fox, D. Reichart, E. Berger, F. A. Harrison, J. S. Bloom, P. A. Price, Predehl P., R. A. Kimble, R. Sari, S. A. Yost, S. G. Djorgovski, S. R. Kulkarni, Sagar R., T. J. Galama, T. M. Brown, Watanabe J.   +19 more
core   +4 more sources

Core-collapse Supernova Explosions in Active Galactic Nucleus Accretion Disks

The Astrophysical Journal, 2023
Astrophysical events that occur in active galactic nucleus (AGN) disks are believed to differ significantly from the ordinary in the interstellar medium.
Fu-Lin Li, Yu Liu, Xiao Fan, Mao-Kai Hu, Xuan Yang, Jin-Jun Geng, Xue-Feng Wu   +6 more
doaj   +1 more source

Infrared attosecond field transients and UV to IR few-femtosecond pulses generated by high-energy soliton self-compression

, 2020
Infrared femtosecond laser pulses are important tools both in strong-field physics, driving X-ray high-harmonic generation, and as the basis for widely tuneable, if inefficient, ultrafast sources in the visible and ultraviolet.
Belli, Federico, Brahms, Christian, Travers, John C.   +2 more
core   +1 more source

Multiwavelength spectral evolution during the 2011 outburst of the very faint X-ray transient Swift J1357.2-0933 [PDF]

, 2012
We report our multiwavelength study of the 2011 outburst evolution of the newly discovered black hole candidate X-ray binary Swift J1357.2-0933. We analysed the Swift X-ray telescope and Ultraviolet/Optical telescope (UVOT) data taken during the ~7 ...
Armas Padilla, Barthelmy, Belloni, Burrows, Casares, Chelovekov, Corbel, Cornelisse, D. M. Russell, Degenaar, Del Santo, Dunn, Evans, Frank, Gehrels, Gehrels, Jonker, Jonker, Kalemci, Krimm, Krimm, M. Armas Padilla, Makishima, N. Degenaar, Pei, R. Wijnands, Rau, Roming, Russell, Schlegel, Tomsick, Wijnands, Wijnands   +32 more
core   +2 more sources

Ultrafast strong-field dissociation of vinyl bromide: An attosecond transient absorption spectroscopy and non-adiabatic molecular dynamics study

Structural Dynamics, 2021
Attosecond extreme ultraviolet (XUV) and soft x-ray sources provide powerful new tools for studying ultrafast molecular dynamics with atomic, state, and charge specificity.
Florian Rott, Maurizio Reduzzi, Thomas Schnappinger, Yuki Kobayashi, Kristina F. Chang, Henry Timmers, Daniel M. Neumark, Regina de Vivie-Riedle, Stephen R. Leone   +8 more
doaj   +1 more source