J/A+A/353/77 Variability & polarization of luminous quasars (Teerikorpi+, 2000)
Evidence for the class of the most luminous quasars.
II. Variability, polarization, and the gap in the MV distribution.
Teerikorpi P.
<Astron. Astrophys. 353, 77 (2000)>
=2000A&A...353...77T 2000A&A...353...77T
ADC_Keywords: QSOs ; Photometry, UBV ; Polarization
Keywords: galaxies: quasars: general
Abstract:
We use 250 radio loud quasars with UBV photometry available and
z<1.65, to study whether there is a gap in the distribution of
absolute magnitudes, from MV~-25.8 (for H0=100km/s/Mpc, q0=0.5)
to -25.3, as was suggested by Teerikorpi (1981A&A....98..309T 1981A&A....98..309T; Paper
I). In Paper I it was also proposed that there is a class of the most
luminous radio quasars, differing in some properties from fainter
quasars on the other side of the gap. The main conclusion of Paper I
remains intact. The gap in the distribution of absolute magnitudes is
confirmed with the new formalism of cosmological Malmquist bias
(Teerikorpi, 1998A&A...339..647T 1998A&A...339..647T), which allows one to use
heterogeneous samples with magnitude inhomogeneity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 91 254 Basic sample (Mmin←22.0mag)
refs.dat 80 57 References for variability
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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/260/202 : Quasar luminosity function (Hawkins+, 1993)
J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (1950)
4- 5 I2 min RAm Right ascension (1950)
7 A1 --- DE- Declination sign (1950)
8- 9 I2 deg DEd Declination (1950)
11- 12 I2 arcmin DEm Declination (1950)
14- 18 F5.3 --- z Redshift
20- 25 F6.2 mag Mmin Absolute V magnitude at minimum brightness
27- 31 F5.2 mag Vcat Catalog V magnitude
33- 36 F4.2 mag B-V B-V colour index
38- 40 F3.1 mag Dm ? Variability amplitude
42 I1 --- Var [0-3] Variability code (1)
44- 48 F5.2 mag Vmin Minimum V magnitude
50- 54 A5 --- Note Notes on photometry (2)
56- 67 A12 --- r_Var Comma-separated references for variability (3)
69- 73 F5.2 % Pol ? Optical polarisation
75- 78 F4.2 % e_Pol ? rms uncertainty on Pol
80- 91 A12 --- r_Pol Comma-separated reference for polarisation (3)
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Note (1): 0: none - 3: good
Note (2): Notes:
1: averages for B-V and/or V
2: Vmin estimated from photographic light-curve in B
or from ITS counts
3: Vmin originally estimated from the PSA
4: δm from |Vcat-Vlightcurve| (4! problematic)
Note (3): See refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference number
6- 24 A19 --- Bibcode Bibcode
26- 47 A22 --- Aut Author's name
49- 82 A34 --- Com Comments
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History: Prepared via OCR at CDS.
References:
Teerikorpi, Paper Ia 1981A&A....98..300T 1981A&A....98..300T
Teerikorpi, Paper I 1981A&A....98..309T 1981A&A....98..309T
(End) James Marcout, Patricia Bauer [CDS] 31-May-2000