Results 11 to 20 of about 1,170,090 (200)

Gaussian Processes for Blazar Variability Studies [PDF]

Galaxies, 2017
This article briefly introduces Gaussian processes as a new approach for modelling time series in the field of blazar physics. In the second part of the paper, recent results from an application of GP modelling to the multi-wavelength light curves of the
Vassilis Karamanavis
doaj   +6 more sources

Early Detection of Multiwavelength Blazar Variability

The Astrophysical Journal
Blazars are a subclass of active galactic nuclei with relativistic jets pointing toward the observer. They are notable for their flux variability at all observed wavelengths and timescales.
Hermann Stolte, Jonas Sinapius, Iftach Sadeh, Elisa Pueschel, Matthias Weidlich, David Berge   +5 more
doaj   +3 more sources

The Relation between Simulated Multiwavelength Blazar Variability and Stochastic Fluctuations [PDF]

The Astrophysical Journal
Blazars exhibit multiwavelength variability, a phenomenon whose underlying mechanisms remain elusive. This study investigates the origin of such variability through leptonic blazar emission simulations, focusing on stochastic fluctuations in ...
Hannes Thiersen, Michael Zacharias, Markus Böttcher   +2 more
doaj   +7 more sources

Optical variability of the blazar 3C 454.3 during 2007-2010

EPJ Web of Conferences, 2013
The optical variability of the blazar 3C 454.3 during 2007-2010 has been studied using the results of multicolor (BVRIJHK) observations. The existence of two variable synchrotron sources was found.
Hagen-Thorn V.A., Larionov V.M., Arkharov A.A., Hagen-Thorn E.I., Blinov D.A.   +4 more
doaj   +2 more sources

BlazEr1: The eROSITA blazar catalog

Astronomy & Astrophysics
Aims.eROSITA, on board the Spectrum Roentgen Gamma (SRG) spacecraft, performed its first X-ray all-sky survey (eRASS1) between December 2019 and June 2020.
Hämmerich S., Gokus A., McBride F., Weber P., Marcotulli L., Zainab A., Collmar W., Salvato M., Wolf J., Sbarrato T., Belladitta S., Buchner J., Saeedi S., Dauner L., Lorenz M., König O., Kirsch C., Berger K., Bahic S., Tubín-Arenas D., Krumpe M., Homan D., Markowitz A., Benke P., Rösch F., Rajasekar Kavitha P., Tambe H., Kadler M., Ros E., Ojha R., Wilms J.   +30 more
doaj   +2 more sources

Variability of Blazars and Blazar Models over 38 Years [PDF]

Galaxies, 2016
Since 1978, when BL Lac objects and violently variable quasars were married to become “blazars”, physical interpretations of the phenomenon have evolved.
Alan P. Marscher
doaj   +2 more sources

Regulatory T Cells and Nanomaterials: Dual Perspectives in Therapeutics and Immunomodulation. [PDF]

Small Sci
Tregs control immune tolerance but can also enable tumor escape. Nanomaterials can now expand or stabilize Tregs to treat autoimmunity and support transplantation or conversely disrupt tumor Tregs to boost antitumor immunity. We also discuss unintended Treg modulation by nanoparticles, safety and manufacturing challenges, and future translational ...
Chen Y, Huang H, Wang X, Yu X, Huang Z, Jin Z, Chen C, Chen Y, Blazar BR, Xu Y, Lu Y.   +10 more
europepmc   +2 more sources

The Nature of γ-Ray Variability in Blazars [PDF]

The Astrophysical Journal, 2020
Abstract We present an in-depth and systematic variability study of a sample of 20 powerful blazars, including 12 BL Lacs and 8 flat-spectrum radio quasars, applying various analysis tools such as flux distribution, symmetry analysis, and time-series analysis on the decade-long Fermi/LAT observations.
Gopal Bhatta, Niraj Dhital
openaire   +3 more sources

Sporecasting Biogeography Across Scales: Continental Patterns and Local Constraints on Macrofungal Dispersal. [PDF]

Mol Ecol
ABSTRACT Understanding how aerial fungal diversity varies across space, habitat, and disturbance is key to linking local‐scale sporocarp (fruiting body) reproduction with continental‐scale biogeography. In this study, we combined passive spore trap metabarcoding with macrofungal sporocarp records from 31 plots in eight sites across North America to ...
Ratz AW, Arnold AE, Burrill HM, Caiafa MV, Conery J, Dawson HA, Delevich CA, Diez JM, Frey SD, Lodge DJ, Ronold EK, Roy BA, Smith ME, U'Ren J, Wilson AW, Loucks JJ, Wuest J, Willis CB, Kennedy PG.   +18 more
europepmc   +2 more sources

Variability in blazars [PDF]

Astronomy and Astrophysics Supplement Series, 1998
The results of both BVRI CCD photometric monitoring and fast photometry for 8 blazars and variable quasars are presented. There is intraday variability for 6 blazars and very short timescales (minutes to two hours) variability for 5 objects. Implications for relativistic beaming are briefly discussed.
Guibin Jia, Cen Xuefen, Ma Huiyu, Jiancheng Wang   +3 more
openaire   +1 more source