Results 31 to 40 of about 89,333 (270)

Absolute Calibration of the Infrared Array Camera on the Spitzer Space Telescope [PDF]

, 2005
The Infrared Array Camera (IRAC) on the Spitzer Space Telescope is absolutely calibrated by comparing photometry of a set of A stars near the north ecliptic pole to predictions based on ground‐based observations and a stellar atmosphere model.
W. Reach, S. Megeath, M. Cohen, J. Hora, S. Carey, J. Surace, S. Willner, P. Barmby, G. Wilson, W. Glaccum, P. Lowrance, M. Marengo, G. Fazio   +12 more
semanticscholar   +1 more source

Suspending failure: temporalities, ontologies, and gigantism in fusion energy development

Journal of the Royal Anthropological Institute, Volume 29, Issue S1, Page 114-132, April 2023., 2023
Abstract Tracing the history of terrestrial fusion energy to a giant multinational experimental fusion facility under construction reveals a series of consequential failures, re‐evaluations of once defunct designs, but also persistence. To account for how this vast enterprise, dogged by failure, endures, I suggest that different ontological narratives ...
Catherine Alexander
wiley   +1 more source

On-orbit performance of the Spitzer Space Telescope [PDF]

SPIE Proceedings, 2004
The Spitzer Space Telescope (formally known as SIRTF) was successfully launched on August 25, 2003, and has completed its initial in-orbit checkout and science validation and calibration period. The measured performance of the observatory has met or exceeded all of its high-level requirements, it has entered normal operations, and is beginning to ...
Roellig, Thomas, Werner, Michael, Gallagher, David, Irace, William, Fazio, Giovanni, Houck, James, Rieke, George, Wilson, Robert, Soifer, Thomas   +8 more
openaire   +4 more sources

Exploiting the IRT-THESEUS Capability to Observe Lensed Quasars

Galaxies, 2021
THESEUS is an ESA space based project, which aims to explore the early universe by unveiling a complete census of Gamma-ray Burst (GRB) population in the first billion years.
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +1 more source

Progress in Diamanes and Diamanoids Nanosystems for Emerging Technologies

Advanced Science, Volume 9, Issue 11, April 14, 2022., 2022
Diamanes and diamanoids are newly discovered graphitic carbon nanostructures. These nanosystems are sp3 carbon networks along with few sp2 hybridized carbon atoms which can be fabricated under controlled temperature & pressure using graphitic system as a precursor.
Santosh K. Tiwari, Raunak Pandey, Nannan Wang, Vijay Kumar, Olusegun J. Sunday, Michał Bystrzejewski, Yanqiu Zhu, Yogendra Kumar Mishra   +7 more
wiley   +1 more source

PHANGS–JWST First Results: Duration of the Early Phase of Massive Star Formation in NGC 628

The Astrophysical Journal Letters, 2023
The earliest stages of star formation, when young stars are still deeply embedded in their natal clouds, represent a critical phase in the matter cycle between gas clouds and young stellar regions.
Jaeyeon Kim, Mélanie Chevance, J. M. Diederik Kruijssen, Ashley. T. Barnes, Frank Bigiel, Guillermo A. Blanc, Médéric Boquien, Yixian Cao, Enrico Congiu, Daniel A. Dale, Oleg V. Egorov, Christopher M. Faesi, Simon C. O. Glover, Kathryn Grasha, Brent Groves, Hamid Hassani, Annie Hughes, Ralf S. Klessen, Kathryn Kreckel, Kirsten L. Larson, Janice C. Lee, Adam K. Leroy, Daizhong Liu, Steven N. Longmore, Sharon E. Meidt, Hsi-An Pan, Jérôme Pety, Miguel Querejeta, Erik Rosolowsky, Toshiki Saito, Karin Sandstrom, Eva Schinnerer, Rowan J. Smith, Antonio Usero, Elizabeth J. Watkins, Thomas G. Williams   +35 more
doaj   +1 more source

THE SPITZER SPACE TELESCOPE SURVEY OF THE ORION A AND B MOLECULAR CLOUDS. I. A CENSUS OF DUSTY YOUNG STELLAR OBJECTS AND A STUDY OF THEIR MID-INFRARED VARIABILITY [PDF]

, 2012
We present a survey of the Orion A and B molecular clouds undertaken with the IRAC and MIPS instruments on board Spitzer. In total, five distinct fields were mapped, covering 9 deg2 in five mid-IR bands spanning 3–24 μm.
S. Megeath, R. Gutermuth, J. Muzerolle, E. Kryukova, K. Flaherty, J. Hora, L. Allen, L. Hartmann, P. Myers, J. Pipher, J. Stauffer, E. Young, G. Fazio   +12 more
semanticscholar   +1 more source

Visible to Mid‐Infrared Optical Constants of Orthopyroxenes

Earth and Space Science, Volume 9, Issue 4, April 2022., 2022
Abstract Radiative transfer models of remotely acquired infrared spectra result in quantitative identification of minerals on planetary surfaces. Optical constants, or the real (n) and imaginary (k) indices of refraction are necessary inputs in such models.
Melinda J. Rucks, Cheng Ye, Elizabeth C. Sklute, Jessica A. Arnold, Nicholas J. DiFrancesco, Timothy D. Glotch   +5 more
wiley   +1 more source

Spitzer Space TelescopeObservations of Kepler’s Supernova Remnant: A Detailed Look at the Circumstellar Dust Component [PDF]

, 2007
We present 3.6-160 μm infrared images of Kepler's supernova remnant (SN 1604) obtained with the IRAC and MIPS instruments on the Spitzer Space Telescope. We also present MIPS SED low-resolution spectra in the 55-95 μm region. The observed emission in the
William P. Blair, Parviz Ghavamian, Knox S. Long, Brian J. Williams, Kazimierz J. Borkowski, Stephen P. Reynolds, Ravi Sankrit   +6 more
openalex   +3 more sources

An investigation of open cluster Melotte 72 using Gaia DR2

Astronomische Nachrichten, Volume 342, Issue 4, Page 613-624, May 2021., 2021
Abstract The estimation of the main parameters of star clusters is significant in astrophysical studies. The most important aspect of using the Gaia DR2 survey lies in the positions, parallax, and proper motions of cluster stars with homogeneous photometry that make the membership probability determine with high accuracy.
Yasser Hendy, Ashraf Tadross
wiley   +1 more source