Results 41 to 50 of about 196,002 (296)

THE 2 Ms CHANDRA DEEP FIELD-NORTH SURVEY AND THE 250 Ks EXTENDED CHANDRA DEEP FIELD-SOUTH SURVEY: IMPROVED POINT-SOURCE CATALOGS [PDF]

, 2016
We present improved point-source catalogs for the 2 Ms Chandra Deep Field-North (CDF-N) and the 250 ks Extended Chandra Deep Field-South (E-CDF-S) Surveys, implementing a number of recent improvements in Chandra source-cataloging methodology. For CDF-N/E-
Yongquan Xue, B. Luo, W. Brandt, D. Alexander, F. Bauer, F. Bauer, F. Bauer, B. Lehmer, B. Lehmer, B. Lehmer, G. Yang   +10 more
semanticscholar   +1 more source

Spitzer Matching Survey of the UltraVISTA Ultra-deep Stripes (SMUVS): Full-mission IRAC Mosaics and Catalogs [PDF]

Astrophysical Journal Supplement Series, 2018
This paper describes new deep 3.6 and 4.5 μm imaging of three UltraVISTA near-infrared survey stripes within the COSMOS field. The observations were carried out with Spitzer’s Infrared Array Camera (IRAC) for the Spitzer Matching Survey of the UltraVISTA
M. Ashby, K. Caputi, W. Cowley, S. Deshmukh, J. Dunlop, B. Milvang-Jensen, J. Fynbo, A. Muzzin, H. McCracken, O. Fèvre, Jia-Sheng Huang, J. Z. H. C. F. Astrophysics, Cambridge, K. Institute, U. Groningen, Institute for Astronomy, U. Edinburgh, Dark Cosmology Centre, Niels Bohr Institute, The Cosmic Dawn Centre, D. Physics, Astronomy, York University, I. Paris, Sorbonne Universités, Laboratoire d'Astrophysique de Marseille, Harvard University   +26 more
semanticscholar   +1 more source

Artificial Star Test for Crowded Field CCD Photometry

Open Astronomy, 2015
A new method of performing an artificial star test (AST) for crowded field stellar CCD photometry is proposed. This AST method is superior in the cases when it is necessary to account for varying photometric quality across the study field, arising due to
Stonkutė R., Vansevičius V.
doaj   +1 more source

A Catalog of Active Galactic Nuclei from the First 1.5 Gyr of the Universe

Frontiers in Astronomy and Space Sciences, 2017
Active galactic nuclei (AGN) are prominent astrophysical objects that can be observed throughout the whole Universe. To understand the underlying physical processes and the different appearance of AGN types, extensive samples are needed.
Krisztina Perger, Sándor Frey, Krisztina É. Gabányi, L. Viktor Tóth   +3 more
doaj   +1 more source

Consolidation of the Gaia catalogue with Chinese Space Station Telescope astrometry

Frontiers in Astronomy and Space Sciences, 2022
The issue of preservation and improvement of the Gaia catalogue throughout the next few decades is addressed. The goal of this study is to evaluate the feasibility of astrometric parameter update, for objects already in the catalogue, by inclusion of new
M. Gai, A. Vecchiato, D. Busonero, A. Riva, R. Cancelliere, M. Lattanzi, Z. Qi   +6 more
doaj   +1 more source

ON THE RELATIONSHIP OF UC H ii REGIONS AND CLASS II METHANOL MASERS. I. SOURCE CATALOGS [PDF]

, 2016
We conducted Very Large Array C-configuration observations to measure positions and luminosities of Galactic Class II 6.7 GHz methanol masers and their associated ultra-compact H ii regions.
Bo Hu, K. Menten, Yuanwei Wu, A. Bartkiewicz, K. Rygl, M. Reid, J. Urquhart, Xing-wu Zheng   +7 more
semanticscholar   +1 more source

Evaluation of the b Maps on the Faults of the Major (M > 7) South California Earthquakes

Earth and Space Science
We use the Godano et al. (2022, https://doi.org/10.1029/2021ea002205) method for evaluating the b maps of the faults associated with the largest earthquakes M ≥ 7.0 that occurred in California.
V. Convertito, A. Tramelli, C. Godano
doaj   +1 more source

Building IoT-Based Applications for Smart Cities: How Can Ontology Catalogs Help?

IEEE Internet of Things Journal, 2018
The Internet of Things (IoT) plays an ever-increasing role in enabling smart city applications. An ontology-based semantic approach can help improve interoperability between a variety of IoT-generated as well as complementary data needed to drive these ...
A. Gyrard, Antoine Zimmermann, A. Sheth
semanticscholar   +1 more source

Approximate methods for the generation of dark matter halo catalogs in the age of precision cosmology [PDF]

, 2016
Precision cosmology has recently triggered new attention on the topic of approximate methods for the clustering of matter on large scales, whose foundations date back to the period from the late 1960s to early 1990s.
P. Monaco
semanticscholar   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source