Results 61 to 70 of about 16,605,004 (178)

A Contact Binary Misclassified as an Ellipsoidal Variable: Complications for Detached Black Hole Searches

The Astronomical Journal
Identifying sources exhibiting ellipsoidal variability in large photometric surveys is becoming a promising method to search for candidate detached black holes (BHs) in binaries.
Tyrone N. O’Doherty, Arash Bahramian, Adelle J. Goodwin, James C. A. Miller-Jones, Jerome A. Orosz, Jay Strader   +5 more
doaj   +1 more source

The dynamic universe: realizing the potential of classical time domain and multimessenger astrophysics

Frontiers in Astronomy and Space Sciences
In parallel with the multi-messenger revolution, major advances in time-domain astronomy across multiple science disciplines relevant to astrophysics are becoming more urgent to address.
Steve B. Howell, D. Andrew Howell, D. Andrew Howell, R. A. Street, Melinda Soares-Furtado, Brian Jackson, Thomas P. Greene   +6 more
doaj   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 4

, 2018
The IV volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Victor Hambardzumyan. AcademicianVictor Hambardzumyan President of International Union of Astronomy (in 1961 – 1964 and 1966 – 72 ...
(CAUCASUS), Astronomy & Astrophysics
core  

Prediscovery TESS Observations of Interstellar Object 3I/ATLAS

The Astrophysical Journal Letters
3I/ATLAS, also known as C/2025 N1 (ATLAS), is the third known macroscopic interstellar object to pass through our solar system. We report serendipitous Transiting Exoplanet Survey Satellite (TESS) observations of 3I/ATLAS taken between 2025 May 7 and ...
Jorge Martinez-Palomera, Amy Tuson, Christina Hedges, Jessie Dotson, Thomas Barclay, Brian Powell   +5 more
doaj   +1 more source

Astronomy Without a Telescope

, 2001
Created by author Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section describes: the celestial sphere, coordinate systems, the motion of the stars.
Strobel, Nick
core  

Real-time processing of the imaging data from the network of Las Cumbres Observatory Telescopes using BANZAI

, 2018
Work in time-domain astronomy necessitates robust, automated data processing pipelines that operate in real time. We present the BANZAI pipeline which processes the thousands of science images produced across the Las Cumbres Observatory Global Telescope (
Harbeck, Daniel-Rolf, Lister, Tim A., McCully, Curtis, Bowman, Mark, Volgenau, Nikolaus H., Siiverd, Robert J., Turner, Monica L., Saunders, Eric S.   +7 more
core   +1 more source

Wideband Monitoring of FRB 20180916B across a Half Decade of Bandwidth Using the Upgraded GMRT

The Astrophysical Journal
With the upgraded Giant Metrewave Radio Telescope (uGMRT) having unprecedented sensitivity and unique capability of providing instantaneous frequency coverage of 250−1460 MHz, we studied FRB 20180916B with 4 month sampling during its active phase.
Siddhartha Bhattacharyya, Jayanta Roy, Apurba Bera   +2 more
doaj   +1 more source

Challenges in Defining and Validating an Astronomy Learning Progression

, 2012
This chapter focuses on challenges in developing and validating a learning progression in the domain of astronomy. These challenges are not unique to astronomy; consideration of them may be useful for researchers working in other areas.
Plummer, Julia D.
core  

Identifying Transitions in Changing-look Active Galactic Nuclei in Light-curve Data with the Zwicky Transient Facility

The Astrophysical Journal
Changing-look active galactic nuclei (CL-AGN) are AGN that transition between Seyfert types, challenging AGN unification models. Most CL-AGN have been identified via repeat spectroscopy, making it difficult to determine the duration and magnitude of the ...
Margaret E. Verrico, K. Decker French, Vivienne F. Baldassare, Colin J. Burke, Laura Duffy, Nicholas Earl, Megan Harrison, Jason T. Hinkle, Alexander Messick, Samaresh Mondal, Yashasvi Moon, Margaret Shepherd, Zachary Stone   +12 more
doaj   +1 more source

SDHDF: A new file format for spectral-domain radio astronomy data [PDF]

Radio astronomy file formats are now required to store wide frequency bandwidths and multiple simultaneous receiver beams and must be able to account for versatile observing modes and numerous calibration strategies.
Hafner, A., McIntyre, V., Dawson, J. R., Huynh, M., Mader, S., Robishaw, T., Price, D. C., Wenger, T., Hobbs, G., Zic, A., Tremblay, C., Toomey, L. J., Carretti, E., Lagoy, D., Staveley-Smith, L., Sarkissian, J., Reynolds, J., CARRETTI, ETTORE, Green, J. A., Kaczmarek, J., Thompson, A.   +20 more
core   +1 more source