Results 71 to 80 of about 333 (144)

The Structure of the Molecular Envelope of the Ring Nebula (NGC 6720)

The Astrophysical Journal
We present the first interferometric imaging of molecular line emission from the Ring Nebula, NGC 6720, in the form of Submillimeter Array (SMA) observations of CO J  = 2 → 1 emission.
Joel H. Kastner, David J. Wilner, Diana Ryder, Paula Moraga Baez, Orsola De Marco, Raghvendra Sahai, Alwyn Wootten, Albert Zijlstra   +7 more
doaj   +1 more source

Design and testing of an on-sky astrophotonic telescope platform for on-chip instrumentation

, 2022
Bulk optical astronomical instruments face significant cost, complexity, flexure and alignment challenges with increasing next generation telescope sizes.
Janz, Siegfried, Artyshchuk, Volodymyr, Schmid, Jens H., Xu, DanXia, de Mooij, Ernst; id_orcid, Tonita, Erin M., Cheriton, Ross, Sivanandam, Suresh, Cheben, Pavel, Weber, John, Densmore, Adam, Hinzer, Karin, Karin Hinzer, Siegfried Janz, Adam Densmore, John Weber, Ernst de Mooij, Ross Cheriton, Suresh Sivanandam, DanXia Xu, Pavel Cheben, Jens H. Schmid, Erin M. Tonita, Volodymyr Artyshchuk   +23 more
core   +1 more source

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

CHara ARray Integrated Optics Testbench (CHARIOT) for on-sky experiments [PDF]

The goal of the CHara ARray Integrated Optics Testbench (CHARIOT) is to establish a fully characterized (nulling) interferometry setup for on-sky tests of novel astrophotonic 2D or 3D beam combiners for the interferometry community worldwide.
Madhav, Kalaga, Scott, Nicholas J., Koehler, Rainer, Barjot, Kévin, Anugu, Narsireddy, Schaefer, Gail H., Mayer, Alyssa V., Thomson, Robert R., Schaefer, Gail, Dinkelaker, Aline N., Farrington, Christopher D., Harris, Robert J., Kubiak, Karolina, Ligon, Edgar R., Labadie, Lucas, Benoît, Aurélien   +15 more
core   +1 more source

Nineteen-port photonic lantern with multimode delivery fiber [PDF]

, 2012
We demonstrate efficient multimode (MM) to single-mode (SM) conversion in a 19-port photonic lantern with a 50 μm core MM delivery fiber. The photonic lantern can be used within the field of astrophotonics for coupling MM starlight to an ensemble of SM ...
Sandberg, Rasmus Kousholt, Lawrence, J. S., Noordegraaf, Danny, Lægsgaard, Jesper, Skovgaard, Peter M. W., Bland-Hawthorn, J., Maack, M. D.   +6 more
core   +1 more source

TESERACT: twin Earth sensor astrophotonic CubeSat

Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave
10 pages, 4 figures, 1 ...
deLoughery, Tyler, Lauzon, Clayton, Sims, Haydn, Almuhtadi, Wahab, Cheriton, Ross   +4 more
openaire   +2 more sources

Tuning multichannel filters based on FBG in multicore fibers

, 2022
Paper 109080O, 10 S.Multichannel filter elements based on fiber Bragg gratings in multicore fibers (MCF) feature excellent potential for applications in astrophotonics.
Heck, M., Nolte, S., Richter, D., Göbel, T.A., Krämer, R.G., Weißflog, M.   +5 more
core   +1 more source

Hierarchical star formation in the Magellanic Clouds with the VMC survey. [PDF]

Proc Int Astron Union, 2021
Miller AE, Cioni ML, de Grijs R, Sun NC, VMC Team.   +4 more
europepmc   +1 more source

Deterministic and Stochastic Study of the X-Ray Emission from the TeV Blazar Mrk 421

The Astrophysical Journal
We present a comprehensive timing analysis of X-ray data from the XMM-Newton satellite, examining 50 light curves covering 17 yr of observations of the blazar Mrk 421. This work uses classical deterministic and stochastic methods in a novel way, enabling
Radim Pánis, Gopal Bhatta, Tek P. Adhikari, Maksym Mohorian, Suvas Chandra Chaudhary, Adithiya Dinesh, Rajesh K. Bachchan, Niraj Dhital, Zdeněk Stuchlík   +8 more
doaj   +1 more source

Large-mode-area infrared guiding in ultrafast laser written waveguides in Sulfur-based chalcogenide glasses

, 2014
International audienceCurrent demands in astrophotonics impose advancing optical functions in infrared domains within embedded refractive index designs.
Calvez, Laurent, Arezki, B., Caillaud, Celine, LeCoarer, E., Nazabal, Virginie, Lecoarer, Etienne, Kern, P., Mauclair, Cyril, Stoian, R., Caillaud, C., Cheng, G., Troles, J., Calvez, L., d'Amico, Ciro, Cheng, Guanghua, Martin, Guillermo, Kern, Pierre, Stoian, Razvan, D'Amico, C., Martin, G., Troles, Johann, Arezki, Brahim, Mauclair, C., Nazabal, V.   +23 more
core   +1 more source