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The BTC40 Survey for Quasars at 4.8 < z < 6 | E.M. Monier
; J.D. Kennefick
; P.B. Hall
; P.S. Osmer
; M.G. Smith
; G.B. Dalton
; R.F. Green
; | Date: |
3 Sep 2002 | Subject: | astro-ph | Affiliation: | Ohio State, Oxford, Princeton/Catolica, CTIO, NOAO | Abstract: | The BTC40 Survey for high-redshift quasars is a multicolor search using images obtained with the Big Throughput Camera (BTC) on the CTIO 4-m telescope in V, I, and z filters to search for quasars at redshifts of 4.8 < z < 6. The survey covers 40 sq. deg. in B, V, & I and 36 sq. deg. in z. Limiting magnitudes (3 sigma) reach to V = 24.6, I = 22.9 and z = 22.9. We used the (V-I) vs. (I-z) two-color diagram to select high-redshift quasar candidates from the objects classified as point sources in the imaging data. Follow-up spectroscopy with the AAT and CTIO 4-m telescopes of candidates having I < 21.5 has yielded two quasars with redshifts of z = 4.6 and z = 4.8 as well as four emission line galaxies with z = 0.6. Fainter candidates have been identified down to I = 22 for future spectroscopy on 8-m class telescopes. | Source: | arXiv, astro-ph/0209055 | Services: | Forum | Review | PDF | Favorites |
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