# 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:

1. bestobjid of target
2. specobjid of Observation 1
3. plate of Observation 1
4. MJD of Observation 1
5. fiberid of Observation 1
6. S/N of Observation 1
7. RA of Observation 1
8. Dec of Observation 1
9. SSPP Flags of Observation 1
10. specobjid of Observation 2
11. plate of Observation 2
12. MJD of Observation 2
13. fiberid of Observation 2
14. S/N of Observation 2
15. RA of Observation 2
16. Dec of Observation 2