Results 31 to 40 of about 211,015 (286)

Six More Ultra-faint Milky Way Companions Discovered in the DECam Local Volume Exploration Survey

The Astrophysical Journal, 2023
We report the discovery of six ultra-faint Milky Way satellites identified through matched-filter searches conducted using Dark Energy Camera (DECam) data processed as part of the second data release of the DECam Local Volume Exploration (DELVE) survey ...
W. Cerny, C. E. Martínez-Vázquez, A. Drlica-Wagner, A. B. Pace, B. Mutlu-Pakdil, T. S. Li, A. H. Riley, D. Crnojević, C. R. Bom, J. A. Carballo-Bello, J. L. Carlin, A. Chiti, Y. Choi, M. L. M. Collins, E Darragh-Ford, P. S. Ferguson, M. Geha, D. Martínez-Delgado, P. Massana, S. Mau, G. E. Medina, R. R. Muñoz, E. O. Nadler, N. E. D. Noël, K. A. G. Olsen, A. Pieres, J. D. Sakowska, J. D. Simon, G. S. Stringfellow, E. J. Tollerud, A. K. Vivas, A. R. Walker, R. H. Wechsler, DELVE Collaboration   +33 more
doaj   +1 more source

Optical Synoptic Telescopes: New Science Frontiers

, 2010
Over the past decade, sky surveys such as the Sloan Digital Sky Survey have proven the power of large data sets for answering fundamental astrophysical questions.
Tyson, J. Anthony
core   +1 more source

The ESO Sky Surveys [PDF]

International Astronomical Union Colloquium, 1984
AbstractTechnical aspects of the production of photographic Sky Surveys and Atlasses are discussed. The need to optimize all factors, e.g. telescope site, telescope optics, mechanics and control system, hypersensitization, calibration, processing and reproduction is illustrated by the ESO 1m Schmidt telescope and the ESO Sky Surveys.
openaire   +1 more source

The All-Sky 408 MHz Survey [PDF]

Symposium - International Astronomical Union, 1981
The 408 MHz All-sky Survey has been made from four radio continuum surveys observed between 1965 and 1978, using the Jodrell Bank MKI telescope, the Effelsberg 100 metre telescope and the Parkes 64 metre telescope. A detailed description of the survey data reduction and calibration methods, with preliminary astronomical results will soon be published ...
C. G. T. Haslam, C. J. Salter, H. Stoffel   +2 more
openaire   +1 more source

60 Microlensing Events from the Three Years of Zwicky Transient Facility Phase One

The Astrophysical Journal, 2023
Microlensing events have historically been discovered throughout the Galactic bulge and plane by surveys designed solely for that purpose. We conduct the first multiyear search for microlensing events on the Zwicky Transient Facility (ZTF), an all-sky ...
Michael S. Medford, Natasha S. Abrams, Jessica R. Lu, Peter Nugent, Casey Y. Lam   +4 more
doaj   +1 more source

B-mode Detection with an Extended Planck Mission

, 2009
The Planck satellite has a nominal mission lifetime of 14 months allowing two complete surveys of the sky. Here we investigate the potential of an extended Planck mission of four sky surveys to constrain primordial B-mode anisotropies in the presence of ...
, A. Kogut ., A. Pontzen, A.D. Linde, A.R. Liddle, B.P. Crill ., C.E. North ., C.L. Reichardt ., CMBPol Study Team collaboration, D.H. Lyth, G Efstathiou, G. Efstathiou, H.K. Eriksen, J. Bock ., K.M. Gorski ., L. McAllister, M. Cruz, M. Zaldarriaga ., M.D. Seiffert ., R. Kallosh, S Gratton, The Planck collaboration, V. Mukhanov, WMAP collaboration, WMAP collaboration, WMAP collaboration, WMAP collaboration   +26 more
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DELVE 6: An Ancient, Ultra-faint Star Cluster on the Outskirts of the Magellanic Clouds

The Astrophysical Journal Letters, 2023
We present the discovery of DELVE 6, an ultra-faint stellar system identified in the second data release of the DECam Local Volume Exploration (DELVE) survey. Based on a maximum-likelihood fit to its structure and stellar population, we find that DELVE 6
W. Cerny, A. Drlica-Wagner, T. S. Li, A. B. Pace, K. A. G. Olsen, N. E. D. Noël, R. P. van der Marel, J. L. Carlin, Y. Choi, D. Erkal, M. Geha, D. J. James, C. E. Martínez-Vázquez, P. Massana, G. E. Medina, A. E. Miller, B. Mutlu-Pakdil, D. L. Nidever, J. D. Sakowska, G. S. Stringfellow, J. A. Carballo-Bello, P. S. Ferguson, N. Kuropatkin, S. Mau, E. J. Tollerud, A. K. Vivas, DELVE Collaboration   +26 more
doaj   +1 more source

An Analysis of the Elements of an All Sky Survey [PDF]

Symposium - International Astronomical Union, 1985
One component of the NASA search for microwave signals of extraterrestrial intelligent origin will be an all sky survey at a significantly low limiting flux over a broad frequency range. We are currently designing an overall strategy which will permit this survey to be: (1) carried out using existing antennas in less than 3 years of observation time ...
Edward T. Olsen, Anatoly Lokshin, Samuel Gulkis   +2 more
openaire   +1 more source

Procedures for Constraining Robotic Fiber Positioning for Highly Multiplexed Spectroscopic Surveys: The Case of FPS for SDSS-V

The Astronomical Journal
One crucial aspect of planning any large scale astronomical survey is constructing an observing strategy that maximizes reduced data quality. This is especially important for surveys that are rather heterogeneous and broad-ranging in their science goals.
Ilija Medan, Tom Dwelly, Kevin R. Covey, Eleonora Zari, Michael R. Blanton, Joleen K. Carlberg, S. Drew Chojnowski, Alexander Ji, Yue Shen, John Donor, José Sánchez-Gallego, Sean Morrison, Héctor J. Ibarra-Medel, Conor Sayres, Keivan G. Stassun   +14 more
doaj   +1 more source

Searching for New Supernova Remnant Candidates from the VTSS Survey

Cumhuriyet Science Journal, 2022
The Virginia Tech Spectral Line Survey (VTSS) Galactic Plane Hydrogen-Alpha Survey has the strong ability to search and discover many different types of objects that cannot be identified clearly on red plates and by other Multi-Wavelength Sky Surveys ...
Elif Beklen
doaj   +1 more source