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Sergey Klimenko - University of Florida. Gainesville, FL, US

Sergey Klimenko

Professor | University of Florida

Gainesville, FL, UNITED STATES

Sergey Klimenko’s research interests include detection of gravitational waves, gamma-ray bursts and as-yet-unknown systems.


Sergey Klimenko’s research interests include gravitational waves, gamma-ray bursts, core-collapse supernovae, soft-gamma repeaters, cosmic strings, late inspiral and mergers of compact binaries, ring-downs of perturbed neutron stars or black holes and as-yet-unknown systems.

Areas of Expertise (4)

Gravitational Waves



Black Holes

Media Appearances (5)

Black holes that 'shouldn’t exist' discovered in the loudest black hole collision on record

Firstpost  online


“I was searching for heavy black holes for 15 years and here it is!” Sergey Klimenko, a physicist at the University of Florida, wrote in an email. “This discovery is a milestone in gravitational wave astronomy.”

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Astronomers find brand new type of black hole

Nanowerk News  online


“We don’t totally understand where it is coming from or how it is formed, but this is the beginning of new physics,” says Sergey Klimenko, who pioneered development of searches for intermediate mass black holes in LIGO. “Astronomers were making bets if such black holes existed or not, and people believed they could not exist, but we found it.”

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UF researchers discover new type of black hole

UF News  online


The UF team involved in this discovery includes Bartos, Sergey Klimenko, Guenakh Mitselmakher, David Tanner, Guido Mueller, Bernard Whiting, Paul Fulda, Steve Eikenberry and John Conklin as well as David Reitze who is the Director of the LIGO Laboratory responsible for the whole project.

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How Fast Can Gravitational Wave Detection Get?

Wired  online


Other groups develop data pipelines to search for the continuous waves, the chorus of background waves, and bursty waves of unknown origin. Sergey Klimenko, of the University of Florida, works on the unknowns. “We developed a method that does not require you to know in advance what are the properties of your source,” he says. “It makes sense because nature may have some surprises for us.” This method looks for spacetime signals that show up the same at the LIGO site in Louisiana, the one in Washington state, and, recently, a Virgo location in Pisa.

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Gravitational waves detected 100 years after Einstein’s prediction

UF News  online


Coherent WaveBurst, was developed at the University of Florida by physics professors Sergey Klimenko and Guenakh Mitselmakher, and their graduate students and postdoctoral research associates. Klimenko and Mitselmakher have been leaders in LIGO’s search for gravitational-wave bursts since 1997. The burst search seeks to detect short gravitational-wave signals from supernovae, gamma-ray bursts, mergers of binary neutron stars and black holes, and other catastrophic astrophysical events.

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Articles (3)

Detecting and reconstructing gravitational waves from the next galactic core-collapse supernova in the advanced detector era

Physical Review D

Marek J. Szczepańczyk, et al.


We performed a detailed analysis of the detectability of a wide range of gravitational waves derived from core-collapse supernova simulations using gravitational-wave detector noise scaled to the sensitivity of the upcoming fourth and fifth observing runs of the Advanced LIGO, Advanced Virgo, and KAGRA. We use the coherent WaveBurst algorithm, which was used in the previous observing runs to search for gravitational waves from core-collapse supernovae.

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coherent WaveBurst, a pipeline for unmodeled gravitational-wave data analysis


Marco Drago, et al.


coherent WaveBurst is a highly configurable pipeline designed to detect a broad range of gravitational-wave transients in the data of the worldwide network of GW detectors. The algorithmic core of cWB is a time–frequency analysis with the Wilson–Daubechies–Meyer wavelets aimed at the identification of GW events without prior knowledge of the signal waveform. cWB has been in active development since 2003 and it has been used to analyze all scientific data collected by the LIGO-Virgo detectors ever since.

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Observing an intermediate-mass black hole GW190521 with minimal assumptions

Physical Review D

Marek J. Szczepańczyk, et al.


On May 21, 2019 the Advanced LIGO and Advanced Virgo detectors observed a gravitational-wave transient GW190521, the heaviest binary black-hole merger detected to date with remnant mass of 142M⊙ that was published recently. This observation is the first strong evidence for the existence of intermediate-mass black holes. The significance of this observation was determined by the coherent waveburst (cWB) search algorithm, which identified GW190521 with minimal assumptions of its source model.

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Prof. Sergey Klimenko, Compact Binary Events Observed by LIGO and Virgo Gravitational Waves Einstein Was Right