A Full Year's Chandra Exposure on SDSS Quasars from the Chandra Multiwavelength Project (2008)
Green, Paul J., Aldcroft, T. L., Richards, G. T., Barkhouse, W. A., Constantin, A., Haggard, D., ...
We study the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey (SDSS) that were observed in 323 Chandra images analyzed by...
Covey, K. R., Agueros, M. A., Green, P. J., Haggard, D., Barkhouse, W. A., Drake, J., ...
We present 348 X-ray emitting stars identified from correlating the Extended Chandra Multiwavelength Project (ChaMP), a serendipitous wide-area X-ray survey, with the Sloan Digital Sky Survey (SDSS)....
Two More Candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey (2008)
Anderson, S. F., Becker, A. C., Haggard, D., Prieto, J. L., Knapp, G. R., Sako, M., ...
AM CVn systems are a select group of ultracompact binaries with the shortest orbital periods of any known binary subclass; mass-transfer is likely from a low-mass (partially-)degenerate secondary...
Chandra multi-wavelength project: normal galaxies at intermediate redshift (2008)
Kim, Dong-Woo, Green, P. J., Barkhouse, W. A., Colmenero, E. R., Haggard, D., Kim, M., ...
SDSS spectroscopic survey of stars (2007)
Ivezic, Z., Schlegel, D., Uomoto, A., Bond, N., Beers, T., Prieto, C. Allende, ...
In addition to optical photometry of unprecedented quality, the Sloan Digital Sky Survey (SDSS) is also producing a massive spectroscopic database. We discuss determination of stellar parameters,...
SDSS spectroscopic survey of stars (2006)
Ivezic, Z., Schlegel, D., Uomoto, A., Bond, N., Beers, T., Allende Prieto, C., ...
In addition to optical photometry of unprecedented quality, the Sloan Digital Sky Survey (SDSS) is also producing a massive spectroscopic database. We discuss determination of stellar parameters,...
Haggard, D., Cool, A. M., Anderson, J., Edmonds, P. D., Callanan, P. J., Heinke, C. O., ...
We report the discovery of an optical counterpart to a quiescent neutron star in the globular cluster Omega Centauri (NGC 5139). The star was found as part of our wide-field imaging study of Omega...