Results 21 to 30 of about 140,683 (272)

An intriguing correlation between the masses and periods of the transiting planets [PDF]

, 2004
We point out an intriguing relation between the masses of the transiting planets and their orbital periods. For the six currently known transiting planets, the data are consistent with a decreasing linear relation.
Alonso, Baraffe, Bouchy, Butler, Charbonneau, Eggenberger, Frédéric Pont, Henry, Konacki, Kovács, Lammer, Mazeh, McArthur, Moutou, Pont, Pourbaix, Santos, Shay Zucker, Torres, Tsevi Mazeh, Udalski, Udalski, Udalski, Zucker, Zucker   +24 more
core   +2 more sources

Snow Depth Variations Estimated from GPS-Reflectometry: A Case Study in Alaska from L2P SNR Data

Remote Sensing, 2016
Snow is a water resource and plays a significant role in the water cycle. However, traditional ground techniques for snow monitoring have many limitations, e.g., high-cost and low resolution. Recently, the new Global Positioning System-Reflectometry (GPS-
Shuanggen Jin, Xiaodong Qian, Hakan Kutoglu   +2 more
doaj   +1 more source

The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. VI. Discovery of Nulling, Localization, and Timing of PSR J1244–4708

The Astrophysical Journal, 2023
Many pulsars in the known population exhibit nulling, which is characterized by a sudden cessation and subsequent restoration of radio emission. In this work, we present the localization, timing, and emission properties of a pulsar discovered by the GMRT
S. Singh, J. Roy, Shyam S. Sharma, B. Bhattacharyya, S. Kudale   +4 more
doaj   +1 more source

Cleaning sky survey databases using Hough Transform and Renewal String approaches [PDF]

, 2003
Large astronomical databases obtained from sky surveys such as the SuperCOSMOS Sky Survey (SSS) invariably suffer from spurious records coming from artefactual effects of the telescope, satellites and junk objects in orbit around earth and physical ...
A. J. Storkey, Ballard, Banday, Bengio, Bock, Brown, C. K. I. Williams, Castillo, Cheselka, Fischler, Hambly, Hambly, Hambly, Hastie, Kiryati, Kiryati, N. C. Hambly, Oppenheimer, Otterpohl, Paciesas, Pearl, R. G. Mann, Rabiner, Storkey, Vandame   +24 more
core   +2 more sources

Astronomical observations: a guide for allied researchers

The Open Journal of Astrophysics, 2019
Observational astrophysics uses sophisticated technology to collect and measure electromagnetic and other radiation from beyond the Earth. Modern observatories produce large, complex datasets and extracting the maximum possible information from them ...
Pauline Barmby
doaj   +1 more source

Deconvolution with correct sampling [PDF]

, 1997
A new method for improving the resolution of astronomical images is presented. It is based on the principle that sampled data cannot be fully deconvolved without violating the sampling theorem.
F. Courbin, Heydari-Malayeri M., Hook R. N., Lucy L., Narayan R., P. Magain, Richardson W. H. J., S. Sohy, Shannon C. J., Skilling J.   +9 more
core   +4 more sources

Data-Mining a Large Digital Sky Survey: From the Challenges to the Scientific Results [PDF]

, 1997
The analysis and an efficient scientific exploration of the Digital Palomar Observatory Sky Survey (DPOSS) represents a major technical challenge. The input data set consists of 3 Terabytes of pixel information, and contains a few billion sources.
de Carvalho, R. R., Djorgovski, S. G., Gal, R. R., Gray, A., Odewahn, S. C., Roden, J., Stolorz, P.   +6 more
core   +3 more sources

Linking the Variation of Sediment Accumulation Rate to Short Term Sea-Level Change Using Cyclostratigraphy: Case Study of the Lower Berriasian Hemipelagic Sediments in Central Tunisia (Southern Tethys)

Frontiers in Earth Science, 2021
High-resolution magnetic susceptibility and % CaCO3 records (5 to 10 cm sampling interval) are used to track astronomical cycles from a Lower Berriasian record from central Tunisia.
Hamdi Omar, Hamdi Omar, Anne-Christine Da Silva, Chokri Yaich, Chokri Yaich   +4 more
doaj   +1 more source

PROTOCALC, a W-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS

The Astrophysical Journal Supplement Series
Current- and next-generation cosmic microwave background (CMB) experiments will measure polarization anisotropies with unprecedented sensitivities. The need for high precision in these measurements underscores the importance of gaining a comprehensive ...
Gabriele Coppi, Nadia Dachlythra, Federico Nati, Rolando Dünner-Planella, Alexandre E. Adler, Josquin Errard, Nicholas Galitzki, Yunyang Li, Matthew A. Petroff, Sara M. Simon, Ema Tsang King Sang, Amalia Villarrubia Aguilar, Edward J. Wollack, Mario Zannoni   +13 more
doaj   +1 more source

Nearly a decade of groundbreaking speckle interferometry at the international Gemini observatory

Frontiers in Astronomy and Space Sciences
Since its inception, speckle interferometry has revolutionized high-resolution astronomical imaging, overcoming atmospheric challenges to achieve the diffraction limits of telescopes. Almost a decade ago, in 2018, a pair of speckle cameras – ‘Alopeke and
Steve B. Howell, Clara E. Martínez-Vázquez, Elise Furlan, Nicholas J. Scott, Rachel A. Matson, Colin Littlefield, Colin Littlefield, Catherine A. Clark, Kathryn V. Lester, Zachary D. Hartman, David R. Ciardi, Sarah J. Deveny, Sarah J. Deveny   +12 more
doaj   +1 more source