Results 111 to 120 of about 152,938 (206)

Spectral Variability of Romano's Star

, 2010
accepted for publication in RevMexAA; 19 pages, 6 tables, 6 ...
Maryeva, O., Abolmasov, P.
openaire   +2 more sources

Improving High-Frequency Spectral Estimates in Spectral Ratio Analysis Using Between-Event PGA Differences

The Seismic Record
Assessment of ground-motion variability is crucial for seismic hazard analysis. However, the variability of peak ground accelerations (PGAs) and spectral stress drops has long been inconsistent, partly due to limitations of the single-corner-frequency ...
Shota Shimmoto
doaj   +1 more source

Quasar spectral slope variability in the optical band

, 2002
We performed a new analysis of B and R light curves of a sample of PG quasars. We confirm the variability-redshift correlation and its explanation in terms of spectral variability, coupled with the increase of rest-frame observing frequency for quasars ...
Vagnetti, F, VAGNETTI, FAUSTO, Trevese, D   +2 more
core   +1 more source

Spectral Variability in the Aged Brain during Fine Motor Control. [PDF]

Front Aging Neurosci, 2016
Quandt F, Bönstrup M, Schulz R, Timmermann JE, Zimerman M, Nolte G, Hummel FC.   +6 more
europepmc   +1 more source

On spectral synthesis in several variables

, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Spectral optical monitoring of a double-peaked emission line AGN Arp 102B: Variability of spectral lines and continuum⋆ [PDF]

, 2013
Context. We present results of long-term (1987–2010) optical spectral monitoring of the broad-line radio galaxy Arp 102B, a prototype of an active galactic nucleus with double-peaked broad emission lines that are commonly assumed to be emitted from an ...
Luis Carrasco Bazúa, CLAUDIA JANET AMPARO TORREALBA GARCIA, JOSE RAMON VALDES PARRA, Victor Manuel Patiño Álvarez, Vahram Chavushyan   +4 more
core  

Probing X-Ray Timing and Spectral Variability in the Blazar PKS 2155–304 over a Decade of XMM-Newton Observations

The Astrophysical Journal
Blazars, a class of active galactic nuclei (AGN) powered by supermassive black holes, are known for their remarkable variability across multiple timescales and wavelengths.
Gopal Bhatta, Suvas Chandra Chaudhary, Niraj Dhital, Tek P. Adhikari, Maksym Mohorian, Adithiya Dinesh, Radim Pánis, Raghav Neupane, Yogesh Singh Maharjan   +8 more
doaj   +1 more source

A Simulation Study Using Terrestrial LiDAR Point Cloud Data to Quantify Spectral Variability of a Broad-Leaved Forest Canopy. [PDF]

Sensors (Basel), 2018
Cifuentes R, Van der Zande D, Salas-Eljatib C, Farifteh J, Coppin P.   +4 more
europepmc   +1 more source

An Informed and Systematic Method to Identify Variable Mid-L Dwarfs

The Astrophysical Journal
Most brown dwarfs show some level of photometric or spectral variability. However, finding the most variable dwarfs more suited for a thorough variability monitoring campaign remained a challenge until a few years ago with the design of spectral indices ...
Natalia Oliveros-Gomez, Elena Manjavacas, Daniella C. Bardalez Gagliuffi, Theodora Karalidi, Johanna M. Vos, Jacqueline K. Faherty   +5 more
doaj   +1 more source

Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714

The Astrophysical Journal Supplement Series
We present photometric observations of the BL Lacertae object S5 0716+714 with a temporal resolution of 120 s in the Sloan ${i}^{{\prime} }$ and ${r}^{{\prime} }$ bands.
Huai-Zhen Li, Di-Fu Guo, Long-Hua Qin, Fen Liu, Hong-Tao Liu, Ting-Feng Yi, Quan-Gui Gao, Shi-Feng Huang, Xing Gao, Xu Chen   +9 more
doaj   +1 more source