NOAO >   Observing Info >   Approved Programs >   2007A-0079

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Proposal Information for 2007A-0079


PI: Tomotsugu Goto, Japan Aerospace Exploration Agency, tomo@ir.isas.jaxa.jp
Address: Infrared, 3-1-1 Yoshinodai,, Sagamihara, Kanagawa 2298510, Japan

Title: J-band imaging of the highest redshift QSO candidates

Abstract: We propose to continue our search for highest redshift (z>6.43) QSOs. Recently, we have successfully found a new QSO at z=5.96 (Fig.1), proving that our strategy works. In this semester, we aim to expand our search to additional candidates. Using the KPNO2.1m/SQIID IR imager, we propose J-band imaging of 100 highest redshift (z>6.43) QSO candidates carefully selected from the large data of the Sloan Digital Sky Survey (SDSS) as a z-band only detection. The proposed J-band is essential in removing the largest contaminants - cosmic rays and late-type stars. The resulting ~ 10 candidates with blue z-J color will be spectroscopically followed-up with an 8m-class telescope to find the highest redshift QSOs at >6.43. Note that we specifically target fainter objects than the previous survey by Fan et al. in order to find even higher redshift QSOs at z>6.43 (thus no overlap with Fan et al.).


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NOAO >   Observing Info >   Approved Programs >   2007A-0079

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