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.
Industry Expertise (2)
Areas of Expertise (4)
Media Appearances (5)
Black holes that 'shouldn’t exist' discovered in the loudest black hole collision on record
“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.”
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.”
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.
How Fast Can Gravitational Wave Detection Get?
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.
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.
Observation of Gravitational Waves from a Binary Black Hole MergerPhysical Review Letters
On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10−21. It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203 000 years, equivalent to a significance greater than 5.1σ.
Method for detection and reconstruction of gravitational wave transients with networks of advanced detectorsPhysical Review D
We present a method for detection and reconstruction of the gravitational wave (GW) transients with the networks of advanced detectors. Originally designed to search for transients with the initial GW detectors, it uses significantly improved algorithms, which enhance both the low-latency searches with rapid localization of GW events for the electromagnetic follow-up and high confidence detection of a broad range of the transient GW sources.
Reconstruction of chirp mass in searches for gravitational wave transientsClassical and Quantum Gravity
The excess energy method is used in searches for gravitational waves (GWs) produced by sources with poorly modeled characteristics. It identifies GW events by searching for coincident excess energy in a GW detector network. While it is sensitive to a wide range of signal morphologies, the energy outliers can be populated by background noise events (background), thereby reducing the statistical confidence of a true signal.
Transient analysis with fast Wilson-Daubechies time-frequency transformJournal of Physics: Conference Series
The time-frequency transforms are important tools for identification of transient events in the output of the gravitational-wave detectors. Produced by the terrestrial and possibly by astrophysical sources, the transient events can be identified as patterns on the time-frequency plane with the excess power above stationary detector noise. In this paper we consider a particular case of the Wilson-Daubechies time-frequency transform for use in the gravitational-wave burst analysis.
Localization of gravitational wave sources with networks of advanced detectorsPhysical Review D
Coincident observations with gravitational wave (GW) detectors and other astronomical instruments are among the main objectives of the experiments with the network of LIGO, Virgo, and GEO detectors. They will become a necessary part of the future GW astronomy as the next generation of advanced detectors comes online. The success of such joint observations directly depends on the source localization capabilities of the GW detectors.