BTC40 J1430+0028 , the SIMBAD biblio

2002AJ....124.2971M - Astron. J., 124, 2971-2979 (2002/November-0)

The BTC40 survey for quasars at 4.8<z<6.

MONIER E.M., KENNEFICK J.D., HALL P.B., OSMER P.S., SMITH M.G., DALTON G.B. and GREEN R.F.

Abstract (from CDS):

The BTC40 Survey for high-redshift quasars is a multicolor search using images obtained with the Big Throughput Camera (BTC) on the Cerro Tololo Inter-American Observatory (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 deg2 in B, V, and I, and 36 deg2 in z. Limiting magnitudes (3 σ) reach to V=24.6, I=22.9, and z=22.9. We used the V-I versus 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 Anglo-Australian Telescope 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.

Abstract Copyright:

Journal keyword(s): Galaxies: Quasars: General - Surveys

Nomenclature: Table 2: BTC40 JHHMM+DDMM N=40.

CDS comments: Table 4, object 3 = BTC40 J0001-4024 not 4025. Table 4, col(1): numbering NN not in SIMBAD.

Simbad objects: 40

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