Publications by authors named "Surabhi Sachdev"
Leveraging the features of the GstLAL pipeline, we present the results of a matched filtering search for asymmetric binary black hole systems with heavily misaligned spins in LIGO and Virgo data taken during the third observing run. Our target systems show strong imprints of precession whereas current searches have nonoptimal sensitivity in detecting them. After measuring the sensitivity improvement brought by our search over standard spin-aligned searches, we report the detection of 30 gravitational wave events already discovered in the latest version of the Gravitational Wave Transient Catalog.
View Article and Find Full Text PDFGravitational waves from subsolar mass inspiraling compact objects would provide almost smoking-gun evidence for primordial black holes (PBHs). We perform the first search for inspiraling planetary-mass compact objects in equal-mass and highly asymmetric mass-ratio binaries using data from the first half of the LIGO-Virgo-KAGRA third observing run. Though we do not find any significant candidates, we determine the maximum luminosity distance reachable with our search to be of O(0.
View Article and Find Full Text PDFArticle Synopsis
- Current multimessenger searches for binary neutron star (BNS) and neutron star-black hole (NSBH) mergers are advancing with the gravitational wave observatories ALIGO, AdVirgo, and KAGRA during their fourth observing run (O4).
- To enhance the search, the study utilized simulated binary populations and conducted a mock data challenge (MDC), optimizing the software used for real-time data analysis and alert generation.
- The paper reports on the low-latency infrastructure performance, with a median alert time of approximately 29.5 seconds for full searches, and emphasizes the importance of early warnings for neutron star mergers with a new trigger system, aiming for responses about 3.1 seconds before mergers occur.