J/A+A/296/665 Survey of optically variables QSOs (Veron+, 1995)
A survey for medium redshift (2.2<z<3.0) optically variable QSOs.
VERON P., HAWKINS M.R.S.
<Astron. Astrophys. 296, 665 (1995)>
=1995A&A...296..665V 1995A&A...296..665V (SIMBAD/NED Reference)
ADC_Keywords: QSOs; Photometry, UBV; Redshifts
Keywords: quasars: general - surveys
Description:
We describe a survey for variable QSOs carried out for 15 years
with the UK Schmidt telescope, using IIIaJ plates exposed behind
a Schott GG395 filter. Objects brighter than B=21.0 on a reference
plate and displaying a peak to peak amplitude of variability larger
than B=0.35mag are selected. Plates in U, V, R and I were also obtained.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 106 107 Medium redshift QSOs
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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2 A1 --- n_Name An '*' indicates that the QSO either is weaker
than B=21.0, has a redshift z > 3.0, or does
not belong to the restricted 18 sq. deg. area
4- 14 A11 --- Name Name
15 A1 --- m_Name Multiplicity index on Name
18- 19 I2 h RAh Right ascension 1950.0
21- 22 I2 min RAm Right ascension 1950.0
24- 28 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- 41 F4.1 arcsec DEs Declination 1950.0
44- 48 F5.3 --- z Redshift
51- 55 F5.2 mag Bmag B magnitude
58- 62 F5.2 mag B-V []? B-V colour
65- 69 F5.2 mag U-B []? U-B colour
71- 75 F5.2 mag B-R B-R colour
78- 81 F4.2 mag dB Amplitude of variability
84- 88 F5.1 mag M(B) Absolute B magnitude computed for
Ho=50Km/s/Mpc and qo=0 in the way described
by Veron-Cetty and Veron(1993)
91- 92 I2 --- Notes Notes (1)
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Note (1):
1 Cristiani et al. 1990b
2 Hawkins and Veron 1993
3 Morris et al. 1991
4 La Franca, F. 1992, private communication
5 Cristiani, S. 1992, private communication
6 AUTOFIB, AAT 1992
7 EFOSC,ESO 3.6m 1986
8 EFOSC,ESO 3.6m 1987
9 EFOSC,ESO 3.6m 1988
10 EFOSC,ESO 3.6m 1989
11 EFOSC,ESO 3.6m 1991
12 EFOSC,ESO 3.6m 1993
References:
Cristiani et al. 1990b
Hawkins and Veron 1993
Morris et al. 1991
Veron-Cetty M.P. and Veron P., 1993, ESO Scientific Report no. 13
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(End) Patricia Bauer [CDS] 20-Sep-1994