2026 P. T. O'Brien: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	120	810	767	79	74	1160	57236

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

120

810

767

1160

57236

Overview

P. T. O'Brien is affiliated with the University of Leicester in the United Kingdom and has a research focus in Physics and Astronomy. Their work spans various subfields including Astronomy and Astrophysics, Nuclear and High Energy Physics, Instrumentation, Computational Mechanics, and Radiation.

The main topics covered in their research include:

Gamma-ray bursts and supernovae
Astrophysical Phenomena and Observations
Pulsars and Gravitational Waves Research
Astrophysics and Cosmic Phenomena
Astronomy and Astrophysical Research
Stellar, planetary, and galactic studies
Galaxies: Formation, Evolution, Phenomena

O'Brien has contributed extensively to scientific literature, with notable papers such as:

Eccentricity estimate for black hole mergers with numerical relativity simulations (2022) published in Nature Astronomy
Heavy-element production in a compact object merger observed by JWST (2023) published in Nature
Gaia Early Data Release 3 (2021) published in Astronomy and Astrophysics
GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst (2023) published in The Astrophysical Journal Letters
Searching for electromagnetic counterparts to gravitational-wave merger events with the prototype Gravitational-Wave Optical Transient Observer (GOTO-4) (2020) published in Monthly Notices of the Royal Astronomical Society

Frequent co-authors working alongside O'Brien include:

R. A. J. Eyles-Ferris
A. J. Levan
B. P. Gompertz
K. Ackley
V. S. Dhillon

The primary venues for their publications cover a range of journals and repositories including:

arXiv (Cornell University)
Monthly Notices of the Royal Astronomical Society
The Astrophysical Journal Letters
Astronomy and Astrophysics
Experimental Astronomy

Best Publications

Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs

P. A. Evans;A. P. Beardmore;K. L. Page;J. P. Osborne

1801
Citations
A gravitational-wave standard siren measurement of the Hubble constant

B. P. Abbott;R. Abbott;T. D. Abbott;F. Acernese;F. Acernese

1162
Citations
An online repository of Swift/XRT light curves of Γ-ray bursts

P. A. Evans;A. P. Beardmore;K. L. Page;L. G. Tyler

1117
Citations
Evidence for a canonical gamma-ray burst afterglow light curve in the Swift XRT data

J. A. Nousek;C. Kouveliotou;D. Grupe;K. L. Page

1096
Citations
The association of GRB 060218 with a supernova and the evolution of the shock wave

Sergio Campana;V. Mangano;A.J. Blustin;P. Brown

1011
Citations
Design concepts for the Cherenkov Telescope Array CTA: An advanced facility for ground-based high-energy gamma-ray astronomy

M. Actis;G. Agnetta;F. Aharonian;A. Akhperjanian

1008
Citations
An online repository of Swift/XRT light curves of GRBs.

P. A. Evans;L. Vetere;D. Morris;M. Capalbi

997
Citations
Introducing the CTA concept

B. S. Acharya;M. Actis;T. Aghajani;G. Agnetta

855
Citations
A short γ-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225

Neil Gehrels;C.L. Sarazin;Paul T. O'Brien;B. Zhang

743
Citations
Calibration of X-ray absorption in our Galaxy

Richard Willingale;R. L. C. Starling;Andrew P. Beardmore;Nial R. Tanvir

741
Citations
Broadband observations of the naked-eye gamma-ray burst GRB 080319B

J. L. Racusin;S. V. Karpov;M. Sokolowski;J. Granot

708
Citations
The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars

N. R. Tanvir;A. J. Levan;C. González-Fernández;O. Korobkin

682
Citations
An optical supernova associated with the X-ray flash XRF 060218.

E. Pian;E. Pian;P. A. Mazzali;N. Masetti;P. Ferrero

680
Citations
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. I, an 8 month campaign of monitoring NGC 5548 with IUE

J. Clavel;G. A. Reichert;D. Alloin;D. M. Crenshaw

673
Citations
Bright X-ray Flares in Gamma-Ray Burst Afterglows

David N. Burrows;Patrizia Romano;Abraham Falcone;Shiho Kobayashi

670
Citations
The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars

N. R. Tanvir;A. J. Levan;C. Gonzalez-Fernandez;O. Korobkin

666
Citations
A new γ-ray burst classification scheme from GRB 060614

N. Gehrels;J. P. Norris;S. D. Barthelmy;J. Granot

644
Citations
An extremely luminous X-ray outburst at the birth of a supernova

A. M. Soderberg;A. M. Soderberg;E. Berger;E. Berger;K. L. Page;P. Schady

630
Citations
A high velocity ionised outflow and XUV photosphere in the narrow emission line quasar PG1211+143

K. A. Pounds;J. N. Reeves;J. N. Reeves;A. R. King;K. L. Page

608
Citations
A Photometric Redshift of z ~ 9.4 for GRB 090429B

A. Cucchiara;A. Cucchiara;A. Cucchiara;A. J. Levan;D. B. Fox;N. R. Tanvir

600
Citations