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The recently initiated Arecibo Legacy Fast ALFA (ALFALFA) survey aims to map 7000 square degrees of the high galactic latitude sky visible from Arecibo, providing a HI line spectral database covering the redshift range between -1600 km/s…

Astrophysics · Physics 2008-11-26 Riccardo Giovanelli , Martha P. Haynes , Brian R. Kent

How many low-mass stars, brown dwarfs and free-floating planets are in the Milky Way? And how are they distributed in our Galaxy? Recent studies of Milky Way interlopers in high-redshift observations have revealed a 150-300 pc thick disk of…

Astrophysics of Galaxies · Physics 2023-06-27 Benne Holwerda , Nor Pirzkal , Adam Burgasser , Chih-Chun Hsu

We present results from a deep mid-infrared survey of the Hubble Deep Field South (HDF-S) region performed at 7 and 15 micron with the CAM instrument on board the Infrared Space Observatory (ISO). The final map in each band was constructed…

Identifying the electromagnetic counterparts of gravitational wave (GW) sources detected by upcoming networks of advanced ground-based interferometers will be challenging due in part to the large number of unrelated astrophysical transients…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Brian D. Metzger , David L. Kaplan , Edo Berger

The Sloan Digital Sky Survey is an ambitious, multi-institutional project to create a huge digital imaging and spectroscopic data bank of 25% of the celestial sphere, approximately 10,000 deg^2 centred on the north galactic polar cap. The…

Astrophysics · Physics 2009-10-30 Bruce Margon

The ESO Public Survey VISTA Variables in the Via Lactea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for ~5 years. In this paper we describe the progress of the…

Astrophysics of Galaxies · Physics 2015-06-03 R. K. Saito , M. Hempel , D. Minniti , P. W. Lucas , M. Rejkuba , I. Toledo , O. A. Gonzalez , J. Alonso-Garcia , M. J. Irwin , E. Gonzalez-Solares , S. T. Hodgkin , J. R. Lewis , N. Cross , V. D. Ivanov , E. Kerins , J. P. Emerson , M. Soto , E. B. Amores , S. Gurovich , I. Dekany , R. Angeloni , J. C. Beamin , M. Catelan , N. Padilla , M. Zoccali , P. Pietrukowicz , C. Moni Bidin , F. Mauro , D. Geisler , S. L. Folkes , S. E. Sale , J. Borissova , R. Kurtev , A. V. Ahumada , M. V. Alonso , A. Adamson , J. I. Arias , R. M. Bandyopadhyay , R. H. Barba , B. Barbuy , G. L. Baume , L. R. Bedin , A. Bellini , R. Benjamin , E. Bica , C. Bonatto , L. Bronfman , G. Carraro , A. N. Chene , J. J. Claria , J. R. A. Clarke , C. Contreras , A. Corvillon , R. de Grijs , B. Dias , J. E. Drew , C. Farina , C. Feinstein , E. Fernandez-Lajus , R. C. Gamen , W. Gieren , B. Goldman , C. Gonzalez-Fernandez , R. J. J. Grand , G. Gunthardt , N. C. Hambly , M. M. Hanson , K. G. Helminiak , M. G. Hoare , L. Huckvale , A. Jordan , K. Kinemuchi , A. Longmore , M. Lopez-Corredoira , T. Maccarone , D. Majaess , E. L. Martin , N. Masetti , R. E. Mennickent , I. F. Mirabel , L. Monaco , L. Morelli , V. Motta , T. Palma , M. C. Parisi , Q. Parker , F. Penaloza , G. Pietrzynski , G. Pignata , B. Popescu , M. A. Read , A. Rojas , A. Roman-Lopes , M. T. Ruiz , I. Saviane , M. R. Schreiber , A. C. Schroder , S. Sharma , M. D. Smith , L. Sodre , J. Stead , A. W. Stephens , M. Tamura , C. Tappert , M. A. Thompson , E. Valenti , L. Vanzi , N. A. Walton , W. Weidmann , A. Zijlstra

The Sloan Digital Sky Survey (SDSS) is collecting photometry and intermediate resolution spectra for ~ 10**5 stars in the thick-disk and stellar halo of the Milky Way. This massive dataset can be used to infer the properties of the stars…

Astrophysics · Physics 2007-05-23 C. Allende Prieto , T. C. Beers , Y. Li , H. J. Newberg , R. Wilhelm , B. Yanny

The Sloan Digital Sky Survey (SDSS) is the largest and most ambitious optical CCD survey undertaken to date. It will ultimately map out one quarter of the sky with precision photometry in five bands, high-quality astrometry, and spectra of…

Astrophysics · Physics 2007-05-23 Eva K. Grebel

This article describes the assembly of an optical (RGB) all-sky mosaic image with an image scale of 36 arcsec/pixel, a limiting magnitude of approx. 14 mag and an 18 bit dynamic range. Using a portable low-cost system, 70 fields (each…

Astrophysics of Galaxies · Physics 2014-11-20 Axel Mellinger

Systematic observations of the Sun are performed at Meudon observatory since 1908 under the form of monochromatic images. However, a major technical improvement occurred in 2017; since this date, spectroscopic datacubes are obtained daily…

Instrumentation and Methods for Astrophysics · Physics 2026-05-19 Jean-Marie Malherbe

The AMI Galactic Plane Survey (AMIGPS) is a large area survey of the outer Galactic plane to provide arcminute resolution images at milli-Jansky sensitivity in the centimetre-wave band. Here we present the first data release of the survey,…

[Abridged] We present the first comprehensive study of short-timescale chromospheric H-alpha variability in M dwarfs using the individual 15 min spectroscopic exposures for 52,392 objects from the Sloan Digital Sky Survey. Our sample…

Solar and Stellar Astrophysics · Physics 2014-11-20 E. A. Kruse , E. Berger , G. R. Knapp , J. E. Gunn , C. P. Loomis , R. H. Lupton , D. J. Schlegel

As the remnants of stars with initial masses $\lesssim$ 8 M$_{\odot}$, white dwarfs contain valuable information on the formation histories of stellar populations. In this paper, we use deep, high-quality, u-band photometry from the Canada…

We have carried out a blind HI survey using the Westerbork Synthesis Radio Telescope to make an inventory of objects with small HI masses (between 10^6 and 10^8 Msol) and to constrain the low-mass end of the HI mass function. The survey has…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 K. Kovac , T. A. Oosterloo , J. M. van der Hulst

In this paper we describe the first data release of the UltraVISTA near-infrared imaging survey of the COSMOS field. We summarise the key goals and design of the survey and provide a detailed description of our data reduction techniques .…

We present initial results from a planned 10 year survey of Ca II H & K emission, using observations made with the ARC 3.5m Telescope at Apache Point Observatory. The primary goal of the survey is to investigate activity cycles in low mass…

Solar and Stellar Astrophysics · Physics 2025-07-11 Brett M. Morris , Leslie Hebb , Suzanne L. Hawley , Kathryn Jones , Jake Romney

The WorldWide Telescope(WWT) is a scientific visualization platform which can browse deep space images, star catalogs, and planetary remote sensing data from different observation facilities in a three-dimensional virtual scene. First…

Instrumentation and Methods for Astrophysics · Physics 2020-03-05 Yunfei Xu , Chenzhou Cui , Dongwei Fan , Shanshan Li , Changhua Li , Jun Han , Linying Mi , Boliang He , Hanxi Yang , Yihan Tao , Sisi Yang , Lan He

The ASAS-SN Low Surface Brightness Survey utilizes the $\sim7$ years of g-band CCD data from ASAS-SN (The All-Sky Automated Survey for Supernovae) to create stacked images of the entire sky. It is significantly deeper than previous…

We present a resolved-star spectroscopic survey of 15 dwarf spheroidal (dSph) satellites of the Andromeda Galaxy (M31) as part of the Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo (SPLASH) project. We filter foreground…

The Sloan Digital Sky Survey (SDSS), originally targeted at quasi-stellar objects, has provided us with a wealth of astronomical byproducts through the last decade. Since then, the number of white dwarfs (WDs) with physically bound…

Solar and Stellar Astrophysics · Physics 2015-03-19 René Heller , Axel D. Schwope , Roy H. Østensen