Search Results - "Alexander, Kate D."

Identifying Tidal Disruption Events with an Expansion of the FLEET Machine-learning Algorithm by Gomez, Sebastian, Villar, V. Ashley, Berger, Edo, Gezari, Suvi, van Velzen, Sjoert, Nicholl, Matt, Blanchard, Peter K., Alexander, Kate. D.

“…Abstract We present an expansion of FLEET, a machine-learning algorithm optimized to select transients that are most likely tidal disruption events (TDEs)…”
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A Late-time Radio Survey of Short Gamma-ray Bursts at z  <  0.5: New Constraints on the Remnants of Neutron-star Mergers by Schroeder, Genevieve, Margalit, Ben, Fong, Wen-fai, Metzger, Brian D., Williams, Peter K. G., Paterson, Kerry, Alexander, Kate D., Laskar, Tanmoy, Goyal, Armaan V., Berger, Edo

“…Abstract Massive, rapidly spinning magnetar remnants produced as a result of binary neutron-star (BNS) mergers may deposit a fraction of their energy into the…”
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A REVERSE SHOCK IN GRB 160509A by Laskar, Tanmoy, Alexander, Kate D., Berger, Edo, Fong, Wen-fai, Margutti, Raffaella, Shivvers, Isaac, Williams, Peter K. G., Kopa, Drejc, Kobayashi, Shiho, Mundell, Carole, Gomboc, Andreja, Zheng, WeiKang, Menten, Karl M., Graham, Melissa L., Filippenko, Alexei V.

“…ABSTRACT We present the second multi-frequency radio detection of a reverse shock in a γ-ray burst. By combining our extensive radio observations of the…”
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Hubble Space Telescope Observations of GW170817: Complete Light Curves and the Properties of the Galaxy Merger of NGC 4993 by Kilpatrick, Charles D., Fong, Wen-fai, Blanchard, Peter K., Leja, Joel, Nugent, Anya E., Palmese, Antonella, Paterson, Kerry, Starkenburg, Tjitske, Alexander, Kate D., Berger, Edo, Chornock, Ryan, Hajela, Aprajita, Margutti, Raffaella

“…Abstract We present the complete set of Hubble Space Telescope imaging of the binary neutron star merger GW170817 and its optical counterpart AT 2017gfo…”
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First ALMA Light Curve Constrains Refreshed Reverse Shocks and Jet Magnetization in GRB 161219B by Laskar, Tanmoy, Alexander, Kate D., Berger, Edo, Guidorzi, Cristiano, Margutti, Raffaella, Fong, Wen-fai, Kilpatrick, Charles D., Milne, Peter, Drout, Maria R., Mundell, C. G., Kobayashi, Shiho, Lunnan, Ragnhild, Duran, Rodolfo Barniol, Menten, Karl M., Ioka, Kunihito, Williams, Peter K. G.

“…We present detailed multiwavelength observations of GRB 161219B at z = 0.1475, spanning the radio to X-ray regimes, and the first Atacama Large…”
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A VLA Study of High-redshift GRBs. II. The Complex Radio Afterglow of GRB 140304A: Shell Collisions and Two Reverse Shocks by Laskar, Tanmoy, Berger, Edo, Margutti, Raffaella, Zauderer, B. Ashley, Williams, Peter K. G., Fong, Wen-fai, Sari, Re'em, Alexander, Kate D., Kamble, Atish

“…We present detailed multifrequency, multiepoch radio observations of GRB 140304A at z = 5.283 from 1 to 86 GHz and from 0.45 to 89 days. The radio and…”
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Millimeter Observations of the Type II SN 2023ixf: Constraints on the Proximate Circumstellar Medium by Berger, Edo, Keating, Garrett K., Margutti, Raffaella, Maeda, Keiichi, Alexander, Kate D., Cendes, Yvette, Eftekhari, Tarraneh, Gurwell, Mark, Hiramatsu, Daichi, Ho, Anna Y. Q., Laskar, Tanmoy, Rao, Ramprasad, Williams, Peter K. G.

“…Abstract We present 1.3 mm (230 GHz) observations of the recent and nearby Type II supernova, SN 2023ixf, obtained with the Submillimeter Array (SMA) at…”
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The Peculiar Radio Evolution of the Tidal Disruption Event ASASSN-19bt by Christy, Collin T., Alexander, Kate D., Margutti, Raffaella, Wieringa, Mark, Cendes, Yvette, Chornock, Ryan, Laskar, Tanmoy, Berger, Edo, Bietenholz, Michael, Coppejans, Deanne L., De Colle, Fabio, Eftekhari, Tarraneh, Holoien, Thomas W.-S., Matsumoto, Tatsuya, Miller-Jones, James C. A., Ramirez-Ruiz, Enrico, Saxton, Richard, van Velzen, Sjoert

“…Abstract We present detailed radio observations of the tidal disruption event (TDE) ASASSN-19bt/AT 2019ahk, obtained with the Australia Telescope Compact…”
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A NEW MODEL FOR THE RADIO EMISSION FROM SN 1994I AND AN ASSOCIATED SEARCH FOR RADIO TRANSIENTS IN M51 by Alexander, Kate D., Soderberg, Alicia M., Chomiuk, Laura B.

“…ABSTRACT We revisit the exquisite archival radio data for the Type Ic supernova SN 1994I and present a revised model for the supernova (SN) radio emission and…”
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Scary Barbie: An Extremely Energetic, Long-duration Tidal Disruption Event Candidate without a Detected Host Galaxy at z = 0.995 by Subrayan, Bhagya M., Milisavljevic, Dan, Chornock, Ryan, Margutti, Raffaella, Alexander, Kate D., Ramakrishnan, Vandana, Duffell, Paul C., Dickinson, Danielle A., Lee, Kyoung-Soo, Giannios, Dimitrios, Lentner, Geoffery, Linvill, Mark, Garretson, Braden, Graham, Matthew J., Stern, Daniel, Brethauer, Daniel, Duong, Tien, Jacobson-Galán, Wynn, LeBaron, Natalie, Matthews, David, Sears, Huei, Venkatraman, Padma

“…Abstract We report multiwavelength observations and characterization of the ultraluminous transient AT 2021lwx (ZTF20abrbeie; aka “Barbie”) identified in the…”
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Radio Properties of Tidal Disruption Events by Alexander, Kate D., van Velzen, Sjoert, Horesh, Assaf, Zauderer, B. Ashley

“…Radio observations of tidal disruption events (TDEs) probe material ejected by the disruption of stars by supermassive black holes (SMBHs), uniquely tracing…”
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AT 2018cow VLBI: no long-lived relativistic outflow by Bietenholz, Michael F, Margutti, Raffaella, Coppejans, Deanne, Alexander, Kate D, Argo, Megan, Bartel, Norbert, Eftekhari, Tarraneh, Milisavljevic, Dan, Terreran, Giacomo, Berger, Edo

“…ABSTRACT We report on Very Long Baseline Interferometry (VLBI) observations of the fast and blue optical transient (FBOT), AT 2018cow. At ∼62 Mpc, AT 2018cow…”
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Short GRB Host Galaxies. I. Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets by Fong, Wen-fai, Nugent, Anya E., Dong, Yuxin, Berger, Edo, Paterson, Kerry, Chornock, Ryan, Levan, Andrew, Blanchard, Peter, Alexander, Kate D., Andrews, Jennifer, Cobb, Bethany E., Cucchiara, Antonino, Fox, Derek, Fryer, Chris L., Gordon, Alexa C., Kilpatrick, Charles D., Lunnan, Ragnhild, Margutti, Raffaella, Miller, Adam, Milne, Peter, Nicholl, Matt, Perley, Daniel, Rastinejad, Jillian, Escorial, Alicia Rouco, Schroeder, Genevieve, Smith, Nathan, Tanvir, Nial, Terreran, Giacomo

“…Abstract We present a comprehensive optical and near-infrared census of the fields of 90 short gamma-ray bursts (GRBs) discovered in 2005–2021, constituting…”
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The Tidal Disruption Event AT 2018hyz II: Light-curve modelling of a partially disrupted star by Gomez, Sebastian, Nicholl, Matt, Short, Philip, Margutti, Raffaella, Alexander, Kate D, Blanchard, Peter K, Berger, Edo, Eftekhari, Tarraneh, Schulze, Steve, Anderson, Joseph, Arcavi, Iair, Chornock, Ryan, Cowperthwaite, Philip S, Galbany, Lluís, Herzog, Laura J, Hiramatsu, Daichi, Hosseinzadeh, Griffin, Laskar, Tanmoy, Müller Bravo, Tomás E, Patton, Locke, Terreran, Giacomo

“…ABSTRACT AT 2018hyz (= ASASSN-18zj) is a tidal disruption event (TDE) located in the nucleus of a quiescent E+A galaxy at a redshift of z = 0.04573, first…”
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The Tidal Disruption Event AT2021ehb: Evidence of Relativistic Disk Reflection, and Rapid Evolution of the Disk–Corona System by Yao, Yuhan, Lu, Wenbin, Guolo, Muryel, Pasham, Dheeraj R., Gezari, Suvi, Gilfanov, Marat, Gendreau, Keith C., Harrison, Fiona, Cenko, S. Bradley, Kulkarni, S. R., Miller, Jon M., Walton, Dominic J., García, Javier A., Velzen, Sjoert van, Alexander, Kate D., Miller-Jones, James C. A., Nicholl, Matt, Hammerstein, Erica, Medvedev, Pavel, Stern, Daniel, Ravi, Vikram, Sunyaev, R., Bloom, Joshua S., Graham, Matthew J., Kool, Erik C., Mahabal, Ashish A., Masci, Frank J., Purdum, Josiah, Rusholme, Ben, Sharma, Yashvi, Smith, Roger, Sollerman, Jesper

“…Abstract We present X-ray, UV, optical, and radio observations of the nearby (≈78 Mpc) tidal disruption event AT2021ehb/ZTF21aanxhjv during its first 430 days…”
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The First Short GRB Millimeter Afterglow: The Wide-angled Jet of the Extremely Energetic SGRB 211106A by Laskar, Tanmoy, Escorial, Alicia Rouco, Schroeder, Genevieve, Fong, Wen-fai, Berger, Edo, Veres, Péter, Bhandari, Shivani, Rastinejad, Jillian, Kilpatrick, Charles D., Tohuvavohu, Aaron, Margutti, Raffaella, Alexander, Kate D., DeLaunay, James, Kennea, Jamie A., Nugent, Anya, Paterson, K., Williams, Peter K. G.

“…Abstract We present the discovery of the first millimeter afterglow of a short-duration γ -ray burst (SGRB) and the first confirmed afterglow of an SGRB…”
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A Radio-selected Population of Dark, Long Gamma-Ray Bursts: Comparison to the Long Gamma-Ray Burst Population and Implications for Host Dust Distributions by Schroeder, Genevieve, Laskar, Tanmoy, Fong, Wen-fai, Nugent, Anya E., Berger, Edo, Chornock, Ryan, Alexander, Kate D., Andrews, Jennifer, Bussmann, R. Shane, Castro-Tirado, Alberto J., Goyal, Armaan V., Kilpatrick, Charles D., Lally, Maura, Miller, Adam A., Milne, Peter, Paterson, Kerry, Escorial, Alicia Rouco, Stroh, Michael C., Terreran, Giacomo, Zauderer, Bevin Ashley

“…Abstract We present centimeter-band and millimeter-band afterglow observations of five long-duration γ -ray bursts (GRBs; GRB 130131A, 130420B, 130609A,…”
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X-ray eruptions every 22 days from the nucleus of a nearby galaxy by Guolo, Muryel, Pasham, Dheeraj R., Zajaček, Michal, Coughlin, Eric R., Gezari, Suvi, Suková, Petra, Wevers, Thomas, Witzany, Vojtěch, Tombesi, Francesco, van Velzen, Sjoert, Alexander, Kate D., Yao, Yuhan, Arcodia, Riccardo, Karas, Vladimír, Miller-Jones, James C. A., Remillard, Ronald, Gendreau, Keith, Ferrara, Elizabeth C.

“…Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered. Some have recurrence times as short as a few hours to a day…”
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JWST detection of a supernova associated with GRB 221009A without an r-process signature by Blanchard, Peter K., Villar, V. Ashley, Chornock, Ryan, Laskar, Tanmoy, Li, Yijia, Leja, Joel, Pierel, Justin, Berger, Edo, Margutti, Raffaella, Alexander, Kate D., Barnes, Jennifer, Cendes, Yvette, Eftekhari, Tarraneh, Kasen, Daniel, LeBaron, Natalie, Metzger, Brian D., Muzerolle Page, James, Rest, Armin, Sears, Huei, Siegel, Daniel M., Yadavalli, S. Karthik

“…Identifying the sites of r-process nucleosynthesis, a primary mechanism of heavy element production, is a key goal of astrophysics. The discovery of the…”
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Identifying Tidal Disruption Events with an Expansion of the FLEET Machine Learning Algorithm by Gomez, Sebastian, Villar, V. Ashley, Berger, Edo, Gezari, Suvi, van Velzen, Sjoert, Nicholl, Matt, Blanchard, Peter K, Alexander, Kate. D

“…We present an expansion of FLEET, a machine learning algorithm optimized to select transients that are most likely to be tidal disruption events (TDEs). FLEET…”
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