J/MNRAS/260/202 Quasar luminosity function (Hawkins+, 1993)
The quasar luminosity function from a variability-selected sample
HAWKINS M.R.S., VERON P.
<Mon. Not. R. Astron. Soc. 260, 202 (1993)>
=1993MNRAS.260..202H 1993MNRAS.260..202H (SIMBAD/NED Reference)
ADC_Keywords: QSOs; Redshifts; Photometry
Keywords: quasars : general - cosmology : observations
Description:
A sample of quasars is selected from a 10-yr sequence of 30 UK Schmidt
plates. Luminosity functions are derived in several redshift intervals,
which in each case show a featureless power-law rise towards low
luminosities. There is no sigh of the 'break' found in the recent
UVX sample of Boyle, Shanks & Peterson. It is suggested that reasons
for the disagreement are connected with biases in the selection of
the UVX sample. The question of the nature of quasar evolution appears
to be still unresolved.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 65 127 List of quasars
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See also:
J/A+A/321/123 : Optical variability of QSOs (Cristiani+ 1997)
J/A+AS/143/357 : Tuorla Quasar Monitoring (Katajainen+ 2000)
J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)
J/A+A/353/77 : Luminous QSO variability & polarization (Teerikorpi+, 2000)
Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Quasar name (1)
13- 14 I2 h RAh Right ascension 1950
16- 17 I2 min RAm Right ascension 1950
19- 23 F5.2 s RAs Right ascension 1950
25 A1 --- DE- Declination sign
26- 27 I2 deg DEd Declination 1950
29- 30 I2 arcmin DEm Declination 1950
32- 35 F4.1 arcsec DEs Declination 1950
37- 41 F5.2 mag Bmag B magnitude at minimum
43- 47 F5.2 mag U-B U-B colour
49- 52 F4.2 --- Signi Significance parameter (2)
54- 58 F5.3 --- z Redshift
60- 65 F6.2 mag MB Absolute B magnitude at minimum
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Note (1): a: FOCAP sample, b: bright sample
Note (2): s is the measure of the significance of the difference between
the maximum and minimum magnitudes
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References:
Boyle B.J., Shanks T. & Peterson B.A., 1988, MNRAS, 235, 935
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Historical notes: Keypunched at CDS
(End) Marie-Jose Wagner, Patricia Bauer [CDS] 05-Dec-1994