Serendipitous Emission Lines in the Sloan Digital Sky Survey

Details Serendipitous Emission Lines in the Sloan Digital Sky Survey Serendipitous Emission Lines in the Sloan Digital Sky Survey

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.1304b&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #13.04; Bulletin of the American Astronomical Society, Vol. 32, p.1423

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present a study of serendipitous emission lines detected in two subsamples of SDSS spectra. We search samples of sky spectra (N ~= 2000) and early-type galaxy spectra (N ~= 5000) for significant emission features (5 sigma limit of 5e-17 ergs/cm2/s) which cannot be attributed to the spectroscopic target. As the majority of discrepant candidates are likely [OII] 3727 (0.1 < z < 1) or Ly-a 1216 (2.2 < z < 4.5), we use measured line widths and profiles to distinguish between the two. Number counts and efficiencies are compared with previous studies, and the ``sky" sample is used to estimate the magnification bias introduced by early-type galaxies selected in the SDSS survey.

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