Next generation sky survey (NGSS)

2003 ◽  
Author(s):  
Peter Eisenhardt ◽  
Edward L. Wright
Keyword(s):  
Next Generation ◽  
Sky Survey

scholarly journals Real-Time Classification of Transient Events in Synoptic Sky Surveys

2011 ◽  
Vol 7 (S285) ◽  
pp. 355-357 ◽  
Author(s):  
Ashish A. Mahabal ◽  
C. Donalek ◽  
S. G. Djorgovski ◽  
A. J. Drake ◽  
M. J. Graham ◽  
...  
Keyword(s):  
Real Time ◽  
Automated Classification ◽  
Next Generation ◽  
Classification Techniques ◽  
Sky Surveys ◽  
Sky Survey ◽  
Transient Events ◽  
Real Time Classification

AbstractAn automated rapid classification of the transient events detected in modern synoptic sky surveys is essential for their scientific utility and effective follow-up when resources are scarce. This problem will grow by orders of magnitude with the next generation of surveys. We are exploring a variety of novel automated classification techniques, mostly Bayesian, to respond to those challenges, using the ongoing CRTS sky survey as a testbed. We describe briefly some of the methods used.

scholarly journals The Next Generation Sky Survey and the Quest for Cooler Brown Dwarfs

2003 ◽  
Vol 211 ◽  
pp. 497-504 ◽  
Author(s):  
J. Davy Kirkpatrick
Keyword(s):  
Brown Dwarfs ◽  
Mass Function ◽  
Solar Neighborhood ◽  
The Sun ◽  
Next Generation ◽  
Brown Dwarf ◽  
Field Mass ◽  
The Earth ◽  
Luminosity Functions ◽  
Sky Survey

The Next Generation Sky Survey (NGSS) is a proposed NASA MIDEX mission to map the entire sky in four infrared bandpasses – 3.5, 4.7, 12, and 23 μm. The seven-month mission will use a 50-cm telescope and four-channel imager to survey the sky from a circular orbit above the Earth. Expected sensitivities will be half a million times that of COBE/DIRBE at 3.5 and 4.7 μm and a thousand times that of IRAS at 12 and 23 μm. NGSS will be particularly sensitive to brown dwarfs cooler than those presently known. Deep absorption in the methane fundamental band at 3.3 μm and a predicted 5-μm overluminosity will produce uniquely red 3.5-to-4.7 μm colors for such objects. For a limiting volume of 25 pc, NGSS will completely inventory the Solar Neighborhood for brown dwarfs as cool as Gl 229B. At 10 pc, the census will be complete to 500 K. Assuming a field mass function with α = 1, there could be one or more brown dwarfs warmer than 150 K lying closer to the Sun than Proxima Centauri and detectable primarily at NGSS wavelengths. NGSS will enable estimates of the brown dwarf mass and luminosity functions to very cool temperatures and will provide both astrometric references and science targets for NGST.

scholarly journals Panchromatic properties of galaxies in wide-field optical spectroscopic and photometric surveys

2011 ◽  
Vol 7 (S284) ◽  
pp. 268-278
Author(s):  
Simon P. Driver
Keyword(s):  
Single Band ◽  
Sloan Digital Sky Survey ◽  
Wide Area ◽  
Wide Field ◽  
Next Generation ◽  
Current Time ◽  
The Past ◽  
Sky Survey ◽  
Almost All ◽  
Multi Band

AbstractThe past 15 years have seen an explosion in the number of redshifts recovered via wide area spectroscopic surveys. At the current time there are approximately 2 million spectroscopic galaxy redshifts known (and rising) which represents an extraordinary growth since the pioneering work of Marc Davis and John Huchra. Similarly there has been a parallel explosion in wavelength coverage with imaging surveys progressing from single band, to multi-band, to truly multiwavelength or pan-chromatic involving the coordination of multiple facilities. With these empirically motivated studies has come a wealth of new discoveries impacting almost all areas of astrophysics. Today individual surveys, as best demonstrated by the Sloan Digital Sky Survey, now rank shoulder-to-shoulder alongside major facilities. In the coming years this trend is set to continue as we begin the process of designing and conducting the next generation of spectroscopic surveys supported by multi-facility wavelength coverage.

scholarly journals Astrometry with digital sky surveys: from SDSS to LSST

2007 ◽  
Vol 3 (S248) ◽  
pp. 537-543 ◽  
Author(s):  
Ž. Ivezić ◽  
D. G. Monet ◽  
N. Bond ◽  
M. Jurić ◽  
B. Sesar ◽  
...  
Keyword(s):  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Error Assessment ◽  
Proper Motions ◽  
Next Generation ◽  
Sky Surveys ◽  
Sky Survey ◽  
The Impact ◽  
Astrometric Data ◽  
The Universe

AbstractMajor advances in our understanding of the Universe have historically come from dramatic improvements in our ability to accurately measure astronomical quantities. The astrometric observations obtained by modern digital sky surveys are enabling unprecedentedly massive and robust studies of the kinematics of the Milky Way. For example, the astrometric data from the Sloan Digital Sky Survey (SDSS), together with half a century old astrometry from the Palomar Observatory Sky Survey (POSS), have enabled the construction of a catalog that includes absolute proper motions as accurate as 3 mas/year for about 20 million stars brighter than V=20, and for 80,000 spectroscopically confirmed quasars which provide exquisite error assessment. We discuss here several ongoing studies of Milky Way kinematics based on this catalog. The upcoming next-generation surveys will maintain this revolutionary progress. For example, we show using realistic simulations that the Large Synoptic Survey Telescope (LSST) will measure proper motions accurate to 1 mas/year to a limit 4 magnitude fainter than possible with SDSS and POSS catalogs, or with the Gaia survey. LSST will also obtain geometric parallaxes with accuracy similar to Gaia's at its faint end (0.3 mas at V=20), and extend them to V=24 with an accuracy of 3 mas. We discuss the impact that these LSST measurements will have on studies of the Milky Way kinematics, and potential synergies with the Gaia survey.

scholarly journals A Next Generation Deep 2-μm Survey: Reconnoitering the Dark Ages

2011 ◽  
Vol 28 (3) ◽  
pp. 266-270 ◽  
Author(s):  
Jeremy Mould
Keyword(s):  
Southern Hemisphere ◽  
Next Generation ◽  
Antarctic Plateau ◽  
Dark Ages ◽  
Sky Survey ◽  
Infrared Surveys ◽  
A Site ◽  
Large Telescopes ◽  
The Antarctic

AbstractThe next generation 2-μm sky survey should target nascent galaxies in the epoch of reionization for spectroscopic followup on large telescopes. A 2.5-m telescope at a site on the Antarctic plateau has advantages for this purpose and for southern hemisphere infrared surveys in general.

Southern Hemisphere Seti Survey: Five Years of Project Meta II

1997 ◽  
Vol 161 ◽  
pp. 611-621
Author(s):  
Guillermo A. Lemarchand ◽  
Fernando R. Colomb ◽  
E. Eduardo Hurrell ◽  
Juan Carlos Olalde
Keyword(s):  
Southern Hemisphere ◽  
Scattering Theory ◽  
Galactic Plane ◽  
Narrow Band ◽  
Neutral Hydrogen ◽  
Sky Survey ◽  
Inertial Frames ◽  
Interstellar Scattering ◽  
Extraterrestrial Origin ◽  
Spectral Channels

AbstractProject META II, a full sky survey for artificial narrow-band signals, has been conducted from one of the two 30-m radiotelescopes of the Instituto Argentino de Radioastronomía (IAR). The search was performed near the 1420 Mhz line of neutral hydrogen, using a 8.4 million channels Fourier spectrometer of 0.05 Hz resolution and 400 kHz instantaneous bandwidth. The observing frequency was corrected both for motions with respect to three astronomical inertial frames, and for the effect of Earths rotation, which provides a characteristic changing signature for narrow-band signals of extraterrestrial origin. Among the 2 × 1013spectral channels analyzed, 29 extra-statistical narrow-band events were found, exceeding the average threshold of 1.7 × 10−23Wm−2. The strongest signals that survive culling for terrestrial interference lie in or near the galactic plane. A description of the project META II observing scheme and results is made as well as the possible interpretation of the results using the Cordes-Lazio-Sagan model based in interstellar scattering theory.

1477: Durability of Next Generation Flexible Ureteroscopes: Randomized Prospective Study

2004 ◽  
Vol 171 (4S) ◽  
pp. 389-389
Author(s):  
Manoj Monga ◽  
Ramakrishna Venkatesh ◽  
Sara Best ◽  
Caroline D. Ames ◽  
Courtney Lee ◽  
...  
Keyword(s):  
Prospective Study ◽  
Next Generation ◽  
Flexible Ureteroscopes
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