SEGUE Duplicate Spectra
Oftentimes, there are multiple spectroscopic observations for an individual photometric object. Some of these targets were intentionally re-observed, either as a QA target, part of a different program or survey, or as part of a repeated plate observation. In Spectroscopic Caveats, we discuss an effective way to remove these repeat observations, keeping only the best spectrum with the highest S/N.
Although they should be removed from most samples, duplicates are very useful for testing different aspects of SEGUE and SDSS, in particular the SSPP. Here we provide a list of the duplicate spectra.
Columns:
- bestobjid of target
- specobjid of Observation 1
- plate of Observation 1
- MJD of Observation 1
- fiberid of Observation 1
- S/N of Observation 1
- RA of Observation 1
- Dec of Observation 1
- SSPP Flags of Observation 1
- specobjid of Observation 2
- plate of Observation 2
- MJD of Observation 2
- fiberid of Observation 2
- S/N of Observation 2
- RA of Observation 2
- Dec of Observation 2