Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Cognard, Ismael"'
Autor:
Voisin, Guillaume, Cognard, Ismaël, Saillenfest, Melaine, Tauris, Thomas, Wex, Norbert, Guillemot, Lucas, Theureau, Gilles, Freire, P. C. C., Kramer, Michael
Context: Timing of pulsar PSR J0337+1715 provides a unique opportunity to test the strong equivalence principle (SEP) with a strongly self-gravitating object. This is due to its unique situation in a triple stellar system with two white dwarfs. Aims:
Externí odkaz:
http://arxiv.org/abs/2411.10066
Autor:
Ferranti, Irene, Falxa, Mikel, Sesana, Alberto, Chalumeau, Aurelien, Porayko, Nataliya, Shaifullah, Golam, Cognard, Ismael, Guillemot, Lucas, Kramer, Michael, Liu, Kuo, Theureau, Gilles
Pulsar Timing Array (PTA) collaborations gather high-precision timing measurements of pulsars with the aim of detecting gravitational wave (GW) signals. A major challenge lies in the identification and characterization of the different sources of noi
Externí odkaz:
http://arxiv.org/abs/2410.18179
Autor:
Hewitt, Danté M., Bhardwaj, Mohit, Gordon, Alexa C., Kirichenko, Aida, Nimmo, Kenzie, Bhandari, Shivani, Cognard, Ismaël, Fong, Wen-fai, de Paz, Armando Gil, Gopinath, Akshatha, Hessels, Jason W. T., Kirsten, Franz, Marcote, Benito, Bezrukovs, Vladislavs, Blaauw, Richard, Bray, Justin D., Buttaccio, Salvatore, Cassanelli, Tomas, Chawla, Pragya, Corongiu, Alessandro, Deng, William, Didehbani, Hannah N., Dong, Yuxin, Gawroński, Marcin P., Giroletti, Marcello, Guillemot, Lucas, Huang, Jeff, Joseph, Ronniy C., Kaspi, Victoria M., Lazda, Mattias, Lindqvist, Michael, Giuseppe, Maccaferri, Mas-Ribas, Lluis, Masui, Kiyoshi W., Mckinven, Ryan, Michilli, Daniele, Nugent, Anya E., Ould-Boukattine, Omar S., Paragi, Zsolt, Pearlman, Aaron B., Pen, Ue-Li, Pleunis, Ziggy, Sand, Ketan R., Shah, Vishwangi, Shin, Kaitlyn, Snelders, Mark P., Venturi, Tiziana, Wang, Na, Williams-Baldwin, David R. A., Yang, Jun, Yuan, Jianping P.
We present the localization and host galaxy of FRB 20190208A, a repeating source of fast radio bursts (FRBs) discovered using CHIME/FRB. As part of the PRECISE repeater localization program on the EVN, we monitored FRB 20190208A for 65.6 hours at $\s
Externí odkaz:
http://arxiv.org/abs/2410.17044
Autor:
Salmi, Tuomo, Deneva, Julia S., Ray, Paul S., Watts, Anna L., Choudhury, Devarshi, Kini, Yves, Vinciguerra, Serena, Cromartie, H. Thankful, Wolff, Michael T., Arzoumanian, Zaven, Bogdanov, Slavko, Gendreau, Keith, Guillot, Sebastien, Ho, Wynn C. G., Morsink, Sharon M., Cognard, Ismaël, Guillemot, Lucas, Theureau, Gilles, Kerr, Matthew
Publikováno v:
ApJ 976 58 (2024)
Recent constraints on neutron star mass and radius have advanced our understanding of the equation of state (EOS) of cold dense matter. Some of them have been obtained by modeling the pulses of three millisecond X-ray pulsars observed by the Neutron
Externí odkaz:
http://arxiv.org/abs/2409.14923
Autor:
Nitu, Iuliana, Keith, Michael, Champion, David, Cognard, Ismael, Desvignes, Gregory, Guillemot, Lucas, Guo, Yanjun, Hu, Huanchen, Jang, Jiwoong, Jawor, Jedrzej, Karuppusamy, Ramesh, Keane, Evan, Kramer, Michael, Lackeos, Kristen, Liu, Kuo, Main, Robert, Perrodin, Delphine, Porayko, Nataliya, Shaifullah, Golam, Theureau, Gilles
In this work, we investigated the presence of strictly periodic, as well as quasi-periodic signals, in the timing of the 25 millisecond pulsars from the EPTA DR2 dataset. This is especially interesting in the context of the recent hints of a gravitat
Externí odkaz:
http://arxiv.org/abs/2408.09795
Autor:
Konijn, David C., Hewitt, Danté M., Hessels, Jason W. T., Cognard, Ismaël, Huang, Jeff, Ould-Boukattine, Omar S., Chawla, Pragya, Nimmo, Kenzie, Snelders, Mark P., Gopinath, Akshatha, Manaswini, Ninisha
The repeating fast radio burst source FRB 20220912A was remarkably active in the weeks after its discovery. Here we report 696 bursts detected with the Nan\c{c}ay Radio Telescope (NRT) as part of the Extragalactic Coherent Light from Astrophysical Tr
Externí odkaz:
http://arxiv.org/abs/2407.10155
Autor:
Larsen, Bjorn, Mingarelli, Chiara M. F., Hazboun, Jeffrey S., Chalumeau, Aurelien, Good, Deborah C., Simon, Joseph, Agazie, Gabriella, Anumarlapudi, Akash, Archibald, Anne M., Arzoumanian, Zaven, Baker, Paul T., Brook, Paul R., Cromartie, H. Thankful, Crowter, Kathryn, DeCesar, Megan E., Demorest, Paul B., Dolch, Timothy, Ferrara, Elizabeth C., Fiore, William, Fonseca, Emmanuel, Freedman, Gabriel E., Garver-Daniels, Nate, Gentile, Peter A., Glaser, Joseph, Jennings, Ross J., Jones, Megan L., Kaplan, David L., Kerr, Matthew, Lam, Michael T., Lorimer, Duncan R., Luo, Jing, Lynch, Ryan S., McEwen, Alexander, McLaughlin, Maura A., McMann, Natasha, Meyers, Bradley W., Ng, Cherry, Nice, David J., Pennucci, Timothy T., Perera, Benetge B. P., Pol, Nihan S., Radovan, Henri A., Ransom, Scott M., Ray, Paul S., Schmiedekamp, Ann, Schmiedekamp, Carl, Shapiro-Albert, Brent J., Stairs, Ingrid H., Stovall, Kevin, Susobhanan, Abhimanyu, Swiggum, Joseph K., Wahl, Haley M., Champion, David J., Cognard, Ismael, Guillemot, Lucas, Hu, Huanchen, Keith, Michael J., Liu, Kuo, McKee, James W., Parthasarathy, Aditya, Perrodin, Delphine, Possenti, Andrea, Shaifullah, Golam M., Theureau, Gilles
Pulsar timing arrays (PTAs) are designed to detect low-frequency gravitational waves (GWs). GWs induce achromatic signals in PTA data, meaning that the timing delays do not depend on radio-frequency. However, pulse arrival times are also affected by
Externí odkaz:
http://arxiv.org/abs/2405.14941
Radio frequency interference (RFI) have been an enduring concern in radio astronomy, particularly for the observations of pulsars which require high timing precision and data sensitivity. In most works of the literature, RFI mitigation has been formu
Externí odkaz:
http://arxiv.org/abs/2402.13867
Autor:
D'Onofrio, Luca, De Rosa, Rosario, Palomba, Cristiano, Leaci, Paola, Piccinni, Ornella J., Sequino, Valeria, Errico, Luciano, Trozzo, Lucia, Palfreyman, Jim, McKee, James W., Meyers, Bradley W., Stairs, Ingrid, Guillemot, Lucas, Cognard, Ismael, Theureau, Gilles, Keith, Michael J., Lyne, Andrew, Flynn, Chris, Stappers, Ben
Publikováno v:
Phys. Rev. D 108, 122002 , Published 4 December 2023
The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsa
Externí odkaz:
http://arxiv.org/abs/2311.08229
Autor:
Hewitt, Danté M., Hessels, Jason W. T., Ould-Boukattine, Omar S., Chawla, Pragya, Cognard, Ismaël, Gopinath, Akshatha, Guillemot, Lucas, Huppenkothen, Daniela, Nimmo6, Kenzie, Snelders, Mark P.
We report on exceptionally bright bursts (>400 Jy ms) detected from the repeating fast radio burst source FRB 20220912A using the Nan\c{c}ay Radio Telescope (NRT), as part of the ECLAT (Extragalactic Coherent Light from Astrophysical Transients) moni
Externí odkaz:
http://arxiv.org/abs/2308.12118