J/AJ/114/2269 A deep multicolor survey. III. (Kennefick+, 1997)
A deep multicolor survey. III. Additional spectroscopy and implications for the number counts of faint quasars. Kennefick J.D., Osmer P.S., Hall P.B., Green R.F. <Astron. J. 114, 2269 (1997)> =1997AJ....114.2269K
ADC_Keywords: QSOs ; Galaxies, photometry ; Surveys Abstract: We have made spectroscopic identifications of 39 additional quasar candidates from the Deep Multicolor Survey (DMS) of Hall et al. (1996, Cat. J/ApJ/462/614). We have identified 9 new quasars with 0.3<z<2.8 and 16.8<B<21.6, all from the group of candidates with ultraviolet excess (UVX). No new quasars with z>3 were found among the observed candidates selected due to their red (B-R) and (V-R) colors. As a result, there are now 55 confirmed quasars in the survey: 42 with 0.3<z<2, nine with 2<z<3, three with 3<z<4, and 1 at z=4.3. One new quasar, DMS 0059-0055, is very bright with B=16.8 and z=0.3, making its detection by our survey very unexpected. Including this new spectroscopy, the results of the DMS are converging with the predicted space densities of other surveys. In particular, we no longer find an excess of quasars with z<2.3 and B<21 in the survey over predictions based on models by Koo & Kron (1988ApJ...325...92K). Also, the excess in the number of quasars seen at z>3 over predictions based on models by Warren et al. (1994ApJ...421..412W) is less than previously suggested. We also demonstrate the success of our quasar color modeling which is important in assessing the completeness of our survey. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 72 9 Quasars: Identifications table2.dat 72 4 Compact narrow emission-lines galaxies: Identifications
See also: J/ApJS/104/185 : A deep multicolor survey. I. (Hall+ 1996) J/ApJ/462/614 : A deep multicolor survey. II. (Hall+ 1996) J/ApJS/119/189 : A deep multicolor Survey. IV. (Osmer+ 1998) Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- No Sequential number 4- 17 A14 --- Name DMS or N designation (1) 19- 20 I2 h RAh Right ascension (1950.0) 22- 23 I2 min RAm Right ascension (1950.0) 25- 29 F5.2 s RAs Right ascension (1950.0) 31 A1 --- DE- Declination sign 32- 33 I2 deg DEd Declination (1950.0) 35- 36 I2 arcmin DEm Declination (1950.0) 38- 42 F5.2 arcsec DEs Declination (1950.0) 44- 47 F4.1 mag Bmag B magnitude 49- 53 F5.3 --- z ? Redshift 54 A1 --- u_z [?] Uncertainty flag on z 56- 72 A17 --- Notes Notes
Note (1): DMS followed by the epoch 1950.0 position in table1, N followed by the epoch 1950.0 position in table2.
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 22-Mar-1999
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