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11 papers · 2 filters
From Radio to X-ray: Flares on the dMe Flare Star EV Lacertae
R. A. Osten, S. L. Hawley, J. C. Allred +2
We present the results of a campaign to observe flares on the M dwarf flare star EV Lacertae over the course of two days in 2001 September, utilizing a combination of radio continu…
Long Period Variables in the LMC: Results from MACHO and 2MASS
Oliver J. Fraser, Suzanne L. Hawley, Kem H. Cook +1
We use the eight year light-curve database from the MACHO (MAssive Compact Halo Objects) project together with infrared colors and magnitudes from 2MASS (the Two Micron All Sky Sur…
The Third Data Release of the Sloan Digital Sky Survey
K. Abazajian et al.
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through June 2003, includes imaging data in five bands ov…
The SuperMACHO Microlensing Survey
A. C. Becker, A. Rest, C. Stubbs +18
We present the first results from our next-generation microlensing survey, the SuperMACHO project. We are using the CTIO 4m Blanco telescope and the MOSAIC imager to carry out a se…
Cataclysmic Variables from SDSS III. The Third Year
Paula Szkody, Arne Henden, Oliver Fraser +17
This paper continues the series that identifies new cataclysmic variables found in the Sloan Digital Sky Survey. We present 36 cataclysmic variables and one possible symbiotic star…
Chandra Observation of V426 Oph: Weighing the Evidence for a Magnetic White Dwarf
Lee Homer, Paula Szkody, John C. Raymond +6
We report the results of a 45 ks Chandra observation of the cataclysmic variable V426 Ophiuchus. The high resolution spectrum from the high-energy transmission grating spectrometer…
Meeting the Cool Neighbors VIII: A preliminary 20-parsec census from the NLTT catalogue
I. N. Reid, K. L. Cruz, P. R. Allen +8
Continuing our census of late-type dwarfs in the Solar Neighbourhood, we present BVRI photometry and optical spectroscopy of 800 mid-type M dwarfs drawn from the NLTT proper motion…
Spectroscopic Properties of Cool Stars in the SDSS: An Analysis of Magnetic Activity and a Search for Subdwarfs
Andrew A. West, Suzanne L. Hawley, Lucianne M. Walkowicz +8
We present a spectroscopic analysis of nearly 8000 late-type dwarfs in the Sloan Digital Sky Survey. Using the Halpha emission line as an activity indicator, we investigate the fra…
A Second Stellar Color Locus: a Bridge from White Dwarfs to M stars
V. Smolcic, Z. Ivezic, G. R. Knapp +14
We report the discovery of a locus of stars in the SDSS g-r vs. u-g color-color diagram that connects the colors of white dwarfs and M dwarfs. While its contrast with respect to th…
A Catalog of Spectroscopically Identified White Dwarf Stars in the First Data Release of the Sloan Digital Sky Survey
S. J. Kleinman, Hugh C. Harris, Daniel J. Eisenstein +23
We present the full spectroscopic white dwarf and hot subdwarf sample from the SDSS first data release, DR1. We find 2551 white dwarf stars of various types, 240 hot subdwarf stars…
A Strategy for Finding Near Earth Objects with the SDSS Telescope
Sean N. Raymond, Oliver J. Fraser, Arti Garg +21
We present a detailed observational strategy for finding Near Earth Objects (NEOs) with the Sloan Digital Sky Survey (SDSS) telescope. We investigate strategies in normal, unbinned…