The second data release from the European Pulsar Timing Array

Antoniadis, John; Arumugam, P.; Arumugam, S.; Babak, S.; Bagchi, Manjari; Nielsen, A.-S. Bak; Bassa, C.; Bathula, Adarsh; Berthereau, A.; Bonetti, Matteo; Bortolas, Elisa; Brook, Paul R.; Burgay, M.; Caballero, R. N.; Chalumeau, A.; Champion, D. J.; Chanlaridis, S.; Chen, Siyuan; Cognard, I.; Dandapat, S; Deb, Debabrata; Desai, S.; Desvignes, G.; Dhanda-Batra, N.; Dwivedi, C.; Falxa, M.; Ferdman, R. D.; Franchini, Alessia; Gair, J. R.; Goncharov, B.; Gopakumar, A.; Graikou, E.; Grießmeier, J.‐M.; Guillemot, L.; Guo, Y. J.; Gupta, Yashwant; Hisano, Shinnosuke; Hu, H.; Iraci, F.; Izquierdo–Villalba, David; Jang, J.; Jawor, J.; Janssen, G. H.; Jessner, A.; Joshi, B. C.; Kareem, F.; Karuppusamy, R.; Keane, E. F.; Keith, M. J.; Kharbanda, D.; Kikunaga, Tomonosuke; Kolhe, N.; Krämer, M.; Krishnakumar, M. A.; Lackeos, K.; Lee, Kejia; Liu, Kuan; Liu, Y.; Lyne, A. G.; McKee, James W.; Maan, Yogesh; Main, Robert; Mickaliger, M. B.; Niţu, I. C.; Nobleson, K.; Paladi, Avinash Kumar; Parthasarathy, A.; Perera, Benetge B. P.; Perrodin, D.; Petiteau, Antoine; Porayko, N. K.; Possenti, Andrea; Prabu, T.; Leclere, H. Quelquejay; Rana, Pryianka; Samajdar, A.; Sanidas, S. A.; Sesana, Alberto; Shaifullah, G.; Singha, Jaikhomba; Speri, Lorenzo; Spiewak, R.; Srivastava, Aman; Stappers, B. W.; Surnis, Mayuresh; Susarla, S. C.; Susobhanan, Abhimanyu; Takahashi, Keitaro; Tarafdar, Pratik; Theureau, G.; Tiburzi, C.; Wateren, E. van der; Vecchio, A.; Krishnan, V. Venkatraman; Verbiest, J. P. W.; Wang, J.; Wang, Lin; Wu, Ziwei

doi:10.1051/0004-6361/202346844

preprintAstronomy and AstrophysicsJun 30, 2023DIAMOND OA

The second data release from the European Pulsar Timing Array

JAJohn Antoniadis PAP. Arumugam SAS. Arumugam SBS. Babak MBManjari Bagchi

Université Paris Cité · Laboratoire AstroParticule et Cosmologie · +7 more institutions

Indexed inarxivcrossrefdoaj

Abstract

We present the results of the search for an isotropic stochastic gravitational wave background (GWB) at nanohertz frequencies using the second data release of the European Pulsar Timing Array (EPTA) for 25 millisecond pulsars and a combination with the first data release of the Indian Pulsar Timing Array (InPTA). A robust GWB detection is conditioned upon resolving the Hellings-Downs angular pattern in the pairwise cross-correlation of the pulsar timing residuals. Additionally, the GWB is expected to yield the same (common) spectrum of temporal correlations across pulsars, which is used as a null hypothesis in the GWB search. Such a common-spectrum process has already been observed in pulsar timing data. We…

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Keywords

Pulsar
Millisecond pulsar
Physics
Gravitational wave
Data set
False alarm
Bayes factor
Astrophysics

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