Search Results - "Laskar, Tanmoy"

Thermal Electrons in Gamma-Ray Burst Afterglows by Ressler, Sean M., Laskar, Tanmoy

“…To date, nearly all multi-wavelength modeling of long-duration γ-ray bursts has ignored synchrotron radiation from the significant population of electrons…”
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Klein–Nishina Corrections to the Spectra and Light Curves of Gamma-Ray Burst Afterglows by McCarthy, George A., Laskar, Tanmoy

“…Abstract Multiwavelength modeling of the synchrotron radiation from relativistic transients such as gamma-ray burst (GRB) afterglows is a powerful means of…”
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Synchrotron self-absorption in GRB afterglows: the effects of a thermal electron population by Warren, Donald C, Barkov, Maxim V, Ito, Hirotaka, Nagataki, Shigehiro, Laskar, Tanmoy

“…In the standard synchrotron afterglow model, a power law of electrons is responsible for all aspects of photon production and absorption. Recent numerical work…”
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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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A VLA Study of High-redshift GRBs. I. Multiwavelength Observations and Modeling of GRB 140311A by Laskar, Tanmoy, Berger, Edo, Chornock, Ryan, Margutti, Raffaella, Fong, Wen-fai, Zauderer, B. Ashley

“…We present the first results from a recently concluded study of GRBs at z 5 with the Karl G. Jansky Very Large Array (VLA). Spanning 1 to 85.5 GHz and 7 epochs…”
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Radio Linear Polarization of GRB Afterglows: Instrumental Systematics in ALMA Observations of GRB 171205A by Laskar, Tanmoy, Hull, Charles L. H., Cortes, Paulo

“…Polarization measurements of gamma-ray burst (GRB) afterglows are a promising means of probing the structure, geometry, and magnetic composition of…”
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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 Millimeter Rebrightening in GRB 210702A by de Wet, Simon, Laskar, Tanmoy, Groot, Paul J., Barniol Duran, Rodolfo, Berger, Edo, Bhandari, Shivani, Eftekhari, Tarraneh, Guidorzi, Cristiano, Kobayashi, Shiho, Perley, Daniel A., Sari, Re’em, Schroeder, Genevieve

“…Abstract We present X-ray to radio frequency observations of the bright long gamma-ray burst GRB 210702A. Our Atacama Large Millimeter/submillimeter Array 97.5…”
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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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GRB 130606A AS A PROBE OF THE INTERGALACTIC MEDIUM AND THE INTERSTELLAR MEDIUM IN A STAR-FORMING GALAXY IN THE FIRST Gyr AFTER THE BIG BANG by CHORNOCK, RYAN, Berger, Edo, Fox, Derek B, Lunnan, Ragnhild, Drout, Maria R, Fong, Wen-Fai, Laskar, Tanmoy, Roth, Katherine C

“…We present high signal-to-noise ratio Gemini and MMT spectroscopy of the optical afterglow of the gamma-ray burst (GRB) 130606A at redshift z = 5.913,…”
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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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On the Deceleration and Spreading of Relativistic Jets. I. Jet Dynamics by Duffell, Paul C., Laskar, Tanmoy

“…Jet breaks in gamma-ray burst (GRB) afterglows provide a direct probe of their collimation angle. Modeling a jet break requires an understanding of the jet…”
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A kilonova following a long-duration gamma-ray burst at 350 Mpc by Rastinejad, Jillian C., Gompertz, Benjamin P., Levan, Andrew J., Fong, Wen-fai, Nicholl, Matt, Lamb, Gavin P., Malesani, Daniele B., Nugent, Anya E., Oates, Samantha R., Tanvir, Nial R., de Ugarte Postigo, Antonio, Kilpatrick, Charles D., Moore, Christopher J., Metzger, Brian D., Ravasio, Maria Edvige, Rossi, Andrea, Schroeder, Genevieve, Jencson, Jacob, Sand, David J., Smith, Nathan, Fernández, José Feliciano Agüí, Berger, Edo, Blanchard, Peter K., Chornock, Ryan, Cobb, Bethany E., De Pasquale, Massimiliano, Fynbo, Johan P. U., Izzo, Luca, Kann, D. Alexander, Laskar, Tanmoy, Marini, Ester, Paterson, Kerry, Escorial, Alicia Rouco, Sears, Huei M., Thöne, Christina C.

“…Gamma-ray bursts (GRBs) are divided into two populations 1 , 2 ; long GRBs that derive from the core collapse of massive stars (for example, ref.  3 ) and…”
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Exploring the Galaxy Mass−metallicity Relation at z ~ 3−5 by Laskar, Tanmoy, Berger, Edo, Chary, Ranga-Ram

“…Long-duration gamma-ray bursts (GRBs) provide a premier tool for studying high-redshift star-forming galaxies thanks to their extreme brightness and…”
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The Radio to GeV Afterglow of GRB 221009A by Laskar, Tanmoy, Alexander, Kate D., Margutti, Raffaella, Eftekhari, Tarraneh, Chornock, Ryan, Berger, Edo, Cendes, Yvette, Duerr, Anne, Perley, Daniel A., Ravasio, Maria Edvige, Yamazaki, Ryo, Ayache, Eliot H., Barclay, Thomas, Duran, Rodolfo Barniol, Bhandari, Shivani, Brethauer, Daniel, Christy, Collin T., Coppejans, Deanne L., Duffell, Paul, Fong, Wen-fai, Gomboc, Andreja, Guidorzi, Cristiano, Kennea, Jamie A., Kobayashi, Shiho, Levan, Andrew, Lobanov, Andrei P., Metzger, Brian D., Ros, Eduardo, Schroeder, Genevieve, Williams, P. K. G.

“…Abstract GRB 221009A ( z = 0.151) is one of the closest known long γ -ray bursts (GRBs). Its extreme brightness across all electromagnetic wavelengths provides…”
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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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GRB 120521C AT z ∼ 6 AND THE PROPERTIES OF HIGH-REDSHIFT γ-RAY BURSTS by Laskar, Tanmoy, Berger, Edo, Tanvir, Nial, Zauderer, B Ashley, Margutti, Raffaella, LeVan, Andrew, Perley, Daniel, Fong, Wen-Fai, Wiersema, Klaas, Menten, Karl, Hrudkova, Marie

“…We present optical, near-infrared, and radio observations of the afterglow of GRB 120521C. By modeling the multi-wavelength data set, we derive a photometric…”
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Radio and X-Ray Observations of the Luminous Fast Blue Optical Transient AT 2020xnd by Bright, Joe S., Margutti, Raffaella, Matthews, David, Brethauer, Daniel, Coppejans, Deanne, Wieringa, Mark H., Metzger, Brian D., DeMarchi, Lindsay, Laskar, Tanmoy, Romero, Charles, Alexander, Kate D., Horesh, Assaf, Migliori, Giulia, Chornock, Ryan, Berger, E., Bietenholz, Michael, Devlin, Mark J., Dicker, Simon R., Jacobson-Galán, W. V., Mason, Brian S., Milisavljevic, Dan, Motta, Sara E., Mroczkowski, Tony, Ramirez-Ruiz, Enrico, Rhodes, Lauren, Sarazin, Craig L., Sfaradi, Itai, Sievers, Jonathan

“…Abstract We present deep X-ray and radio observations of the fast blue optical transient (FBOT) AT 2020xnd/ZTF 20acigmel at z = 0.2433 from 13 days to 269 days…”
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