Brendan michael O'Connor

Portrait of Brendan michael O'Connor

Brendan michael O'Connor

Post-Doctoral Associate

Neil Gehrels Postdoctoral Prize Fellow

oconnorb@umd.edu University Of Maryland College Park

Hi, I'm Brendan. I am a Neil Gehrels Fellow working in time-domain and multimessenger (TDAMM) astrophysics. My research focuses on the origin and evolution of high-energy transients and the extreme stellar systems that produce them. I am particularly interested in the relativistic outflows that produce gamma-ray bursts and fast X-ray transients, including phenomena associated with the deaths of massive stars and the mergers of compact objects. I use a variety of multiwavelength observatories across the electromagnetic spectrum (e.g., Gemini, Chandra, HST, JWST) to investigate the physical mechanisms that power these transients and to constrain the properties of their progenitors and environments.

I received my PhD from The George Washington University in 2023. Prior to moving to Maryland, I was a McWilliams Fellow at Carnegie Mellon University.

Research Centers & Collaborations: Joint Space-Science Institute

Latest Papers

Prospects for Gamma-Ray Burst Afterglow Discovery with the Eric and Wendy Schmidt Observatory System

| The Astrophysical Journal
Author(s): James Freeburn, Dougal Dobie, Akash Anumarlapudi, et. al
UMD Author(s): Brendan michael O'Connor


EP250827b/SN 2025wkm: An X-Ray Flash-supernova Powered by a Central Engine and Circumstellar Interaction

| The Astrophysical Journal Letters
Author(s): Srinivasaragavan, Gokul P., Li, Dongyue, Hall, Xander J.
UMD Author(s): Michael Coleman Miller, Gokul Prem Srinivasaragavan, Brendan michael O'Connor


GRB 260310A/SN 2026fgk: Photometric and Spectroscopic Evolution of a Nearby Gamma-Ray Burst Supernova and an Exceptionally Bright Afterglow at z = 0.153

| The Astrophysical Journal
Author(s): Brendan O’Connor, Malte Busmann, Xander J. Hall, et. al
UMD Author(s): Brendan michael O'Connor


EP250827b/SN 2025wkm: An X-Ray Flash-supernova Powered by a Central Engine and Circumstellar Interaction

| The Astrophysical Journal Letters
Author(s): Srinivasaragavan, Gokul P., Li, Dongyue, Hall, Xander J.
UMD Author(s): Michael Coleman Miller, Gokul Prem Srinivasaragavan, Brendan michael O'Connor


EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-lined Supernova

| The Astrophysical Journal Letters
Author(s): Brendan O’Connor, Xander J. Hall, Malte Busmann, et. al
UMD Author(s): Brendan michael O'Connor


The DESI Transients Survey: Legacy Classifications and Methodology

| The Astrophysical Journal Supplement Series
Author(s): Xander J. Hall, Antonella Palmese, Segev BenZvi, et. al
UMD Author(s): Brendan michael O'Connor


AT2025ulz and S250818k: Leveraging DESI Spectroscopy in the Hunt for a Kilonova Associated with a Subsolar-mass Gravitational-wave Candidate

| The Astrophysical Journal Letters
Author(s): Xander J. Hall, Antonella Palmese, Brendan O’Connor, et. al
UMD Author(s): Brendan michael O'Connor


Detecting Prompt and Afterglow Jet Emission of Gravitational-wave Events from LIGO/Virgo/KAGRA and Next-generation Detectors

| The Astrophysical Journal
Author(s): Ravjit Kaur, Brendan O’Connor, Antonella Palmese, et. al
UMD Author(s): Brendan michael O'Connor


A Merger within a Merger: Chandra Pinpoints the Short GRB 230906A in a Peculiar Environment

| The Astrophysical Journal Letters
Author(s): S. Dichiara, E. Troja, B. O’Connor, et. al
UMD Author(s): Brendan michael O'Connor


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