Underwater Reverberation Suppression via Attention and Cepstrum Analysis-Guided Network
Journal of Marine Science and Engineering, 2023 Active sonar systems are one of the most commonly used acoustic devices for underwater equipment. They use observed signals, which mainly include target echo signals and reverberation, to detect, track, and locate underwater targets. Reverberation is the
Yukun Hao +6 more
doaj +1 more source
ROBOTIC REVERBERATION MAPPING OF ARP 151 [PDF]
The Astrophysical Journal, 2015 We present the first results from the Las Cumbres Observatory Global Telescope (LCOGT) Network's Active Galactic Nuclei Key Project, a large program devoted to using the robotic resources of LCOGT to perform time domain studies of active galaxies. We monitored the Seyfert 1 galaxy Arp~151 (Mrk~40) for $\sim$200 days with robotic imagers and with the ...
S. Valenti +12 more
openaire +5 more sources
REVERBERATION RESPONSES IN LIGHT CURVES OF THE Q2237+0305 QUASAR [PDF]
Radio Physics and Radio Astronomy, 2018 Purpose: Studying the spatial structure of the quasar in the Q2237+0305 gravitational lens system in optical spectral range; estimating the central black hole mass.
L. A. Berdina +2 more
doaj +1 more source
A Negative Long Lag from the Optical to the UV Continuum in Fairall 9
The Astrophysical Journal, 2023 We report the detection of a long-timescale negative lag, where the blue bands lag the red bands, in the nearby Seyfert 1 galaxy Fairall 9, with two independent methods.
Philippe Z. Yao +4 more
doaj +1 more source
Discovery of a Luminosity-dependent Continuum Lag in NGC 4151 from Photometric and Spectroscopic Continuum Reverberation Mapping [PDF]
Astrophysical JournalAccretion onto supermassive black holes (SMBHs) powers active galactic nuclei (AGNs) and drives feedback that shapes galaxy evolution. Constraining AGN accretion disk structure is therefore essential for understanding black hole growth and feedback ...
H. Feng +19 more
semanticscholar +1 more source
ASTROMETRIC REVERBERATION MAPPING [PDF]
The Astrophysical Journal, 2012 ApJ in ...
openaire +2 more sources
LITMUS: Bayesian lag recovery in reverberation mapping with fast differentiable models [PDF]
Publications Astronomical Society of AustraliaReverberation mapping (RM) is a technique in which the mass of a Seyfert I galaxy’s central supermassive black hole is estimated, along with the system’s physical scale, from the timescale at which variations in brightness propagate through the galactic ...
H. McDougall, B. Pope, Tamara M. Davis
semanticscholar +1 more source
Accretion disc reverberation mapping of the quasar 3C 273 [PDF]
Monthly notices of the Royal Astronomical SocietyWe present accretion disc size measurements for the well-known quasar 3C 273 using reverberation mapping (RM) performed on high-cadence light-curves in seven optical filters collected with the Las Cumbres Observatory (LCO). Lag estimates obtained using
James P. Thorne +7 more
semanticscholar +1 more source
The SDSS-V Black Hole Mapper Reverberation Mapping Project: Light Echoes of the Coronal-line Region in a Luminous Quasar [PDF]
Astrophysical JournalWe present a reverberation mapping (RM) analysis of the coronal line [Ne v] λ3427-emitting region of the quasar COS168 (SDSS J095910.30+020732.2). [Ne v] λ3427 is known as one of the “coronal lines,” which are a species of emission lines present in ...
Theodore B. Smith +22 more
semanticscholar +1 more source
Reverberation Mapping of Luminous Quasars at High z [PDF]
The Astrophysical Journal, 2018 Abstract We present reverberation mapping (RM) results for 17 high-redshift, high-luminosity quasars with good-quality R-band and emission-line light curves. We are able to measure statistically significant lags for Lyα (11 objects), Si iv (5 objects), C iv (11 objects), and C iii] (2 objects).
Paulina Lira +8 more
openaire +3 more sources