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VII/182 Cat of High-Redshift Quasars, z >= 2.2, in SGP and F401 (Warren+ 1991)
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A wide-field multicolor survey for high-redshift quasars, z>=2.2 .
I. Photometric catalog and survey selection function
Warren S.J., Hewett P.C., Irwin M.J., Osmer P.S.
<Astrophys. J. Suppl. Ser. 76, 1 (1991)>
=1991ApJS...76....1W
A wide-field multicolor survey for high-redshift quasars, z>=2.2 .
II. The quasar catalog
Warren S.J., Hewett P.C., Osmer P.S.
<Astrophys. J. Suppl. Ser. 76, 23 (1991)>
=1991ApJS...76...23W
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ADC_Keywords: Galaxy catalogs ; QSOs
Description:
(Paper I)
We provide details of a multicolor ( u, b_j_, v, or, r, i), wide-field,
faint magnitude survey for high-redshift (z >= 2.2 ) quasars. The
survey extends over the magnitude range 16 <= m_or_ <= 20 and covers
a total area of 58.6 square degrees. Sources of incompleteness in the
photometric catalog are quantified, giving the survey an effective
area of 45.7 square degrees.
Particular attention is paid to the details of the plate-matching and
image-classification procedures used in the generation of the
photometric catalog from which quasars are selected, in order that the
number of spurious quasar candidates be kept to an absolute minimum.
The selection of candidates incorporates a number of novel features,
including treating the multicolor information as low-resolution
spectra, adopting a quantitative candidate identification algorithm
that employs all the available information, and requiring only that
objects be detected in the or passband.
We describe how model quasar spectra are used to calculate the
selection function for the survey, and we present the computed sample
completeness, as a function of redshift and magnitude, for a range of
representative quasar types. The spectroscopic results of the survey
are reported in a companion paper and the derivation of the quasar
luminosity function at high redshift will be reported in a third
paper.
(Paper II)
In a wide-field multicolor survey (45.7 deg^2^, 16.0 <= m_or_ <= 20.0)
we have discovered 130 new quasars, of which 100 are of redshift z >=
2.2. There are 49 new quasars of redshift z >= 3.0 including three of
z >= 4.0. We provide spectra, coordinates, redshifts, broad-band
magnitudes (u, b_j_, v, or, r, i), line-equivalent widths for
Lyman-{alpha}/N_V and C_IV, FWHM C_IV, and continuum spectral indices
for all the new quasars. The sample includes 96 quasars selected
according to the rigid criteria detailed in the companion paper by
Warren, Hewett, Irwin, and Osmer. These are combined with 14
previously known quasars in one of our fields, which also meet these
selection criteria, to form a complete sample. The median equivalent
width for Lyman-{alpha}/N_V for the complete sample is 67A, and for
C_IV is 31A. The median FWHM C_IV is 35A and the median spectral index
is {alpha} = -0.60. The complete sample contains at least five broad
absorption-line quasars. We have obtained spectra of a total of 473
multicolor-selected candidates. The proportion of quasars found,
including previously-known quasars, of all redshifts, is 30%. The
proportion of quasars of redshift z >= 2.2 in the list of candidates
that satisfy the selection criteria of the complete sample is 43%.
Finally we limit the sample to the 85 objects of redshift z >= 2.2 in
the complete sample, and summarize the relevant observational data
input to the calculation of the luminosity function, comprising the
redshift versus magnitude distribution and the distribution of the
spectral properties. The analysis of the luminosity function will be
presented in a forthcoming paper.
* For paper II, see also documentation files "doc.tex" (LaTeX) or
"doc.txt" (plain ascii).
Notes: Tables 1-4 in paper II have been joined into one file "IItbls".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 68 30 Known non-UV-excess QSOs in the SGP (I)
adc.sty 78 68 to process doc.tex
doc.tex 80 180 ADC documentation file (LaTeX) (II)
doc.txt 73 284 ADC documentation file (II)
tables.dat 129 130 high-z QSOs in SGP and F401 (II)
table5.dat 55 14 previously-known high-z QSOs in SGP (II)
table6.dat 78 12 new UV excess quasars
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 I1 h RAh [0,1]+= right ascension (hours) (B1950)
3- 4 I2 min RAm right ascension (minutes)
6- 10 F5.2 s RAs right ascension (seconds)
12 A1 --- DE- [-]! declination sign
13- 14 I2 deg DEd declination (degrees) (B1950)
16- 17 I2 arcmin DEm declination (minutes)
19- 22 F4.1 arcsec DEs declination (seconds)
24 A1 --- l_m(u) [>] limit flag on m(u)
25- 29 F5.2 mag m(u) u-band magnitude
31- 35 F5.2 mag m(bj) bj-band magnitude
37- 41 F5.2 mag m(v) v-band magnitude
43- 47 F5.2 mag m(or) or-band magnitude
49- 53 F5.2 mag m(r) r-band magnitude
55- 59 F5.2 mag m(i) i-band magnitude
* These passbands are UK Schmidt Telescope
system (see paper).
61- 64 F4.2 --- z ? redshift z (No value is given in 11th
entry due to no emission lines.)
66 A1 --- ListA [YN]! included in list A or not (see paper)
67 A1 --- ListB [YN]! included in list B or not (see paper)
68 A1 --- r_z [1-6]! reference code for redshift
(see paper)
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1 A1 --- Note [n] 'n' is there is a note
2- 10 A9 --- ID *[ 0-9AB-] ! Name based on 1950 coordinates
12- 13 I2 h RAh += Right Ascension 1950 (hours)
15- 16 I2 min RAm Right Ascension 1950 (minutes)
18- 22 F5.2 s RAs Right Ascension 1950 (seconds)
24 A1 --- DE- [-] ! Declination 1950 (sign)
25- 26 I2 deg DEd Declination 1950 (degrees)
28- 29 I2 arcmin DEm Declination 1950 (minutes)
31- 34 F4.1 arcsec DEs Declination 1950 (seconds)
36- 39 I4 a DATEy [1986,1989] UT date of observation: year
41- 43 A3 --- DATEm [AugSep]! UT date of observation: month
45- 46 I2 d DATEd ! UT date of observation: day
48 A1 --- TEL [AC] ! Telescope where spectrum obtained:
A = AAT, C = CTIO 4 m.
50- 53 F4.2 --- z Redshift
54 A1 --- u_z [: ] Uncertainty flag for z
56 A1 --- ListA [YN] "Y" if object included in List A
60 A1 --- ListB [YN] "Y" if object included in List B
63- 65 A3 --- Plot [0-9SF] ! Plot number in Figure 1 (SGP) and
Figure 2 (F401) (see paper)
67 A1 --- l_m(u) Limit flag (>) on m(u)
68- 72 F5.2 mag m(u) Magnitude in broad-band UKST band
74 A1 --- l_m(bj) Limit flag (>) on m(bj)
75- 79 F5.2 mag m(bj) Magnitude in broad-band UKST band
81 A1 --- l_m(v) Limit flag (>) on m(v)
82- 86 F5.2 mag m(v) Magnitude in broad-band UKST band
88- 92 F5.2 mag m(or) Magnitude in broad-band UKST band
94- 98 F5.2 mag m(r) Magnitude in broad-band UKST band
100 A1 --- l_m(i) Limit flag (>) on m(i)
101-105 F5.2 mag m(i) Magnitude in broad-band UKST band
107-109 I3 0.1nm W(Ly1) ? Equivalent width Lyman-{alpha}/NV blend
110 A1 --- u_W(Ly1) Uncertainty flag (:) on W(Ly1)
112-114 I3 0.1nm W(CIV) ? Equivalent width (BAL emission) of CIV line
115 A1 --- u_W(CIV) [-:] Uncertainty flag (:) on W(CIV), or dash
(EM eq. width exists), or blank
116-117 I2 0.1nm WEM(CIV) ? Equivalent width (EW emission) of CIV line
119-121 I3 0.1nm e_W(CIV) ? FWHM of W(CIV)
122 A1 --- u_e_W(CIV) Uncertainty flag (:) on e_W(CIV)
124-128 F5.2 --- alpha ? Spectral index (f({nu}) = {nu}**{alpha})
129 A1 --- u_alpha [: ] Uncertainty flag on {alpha}
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Note on ID: Notes on individual quasars
# 0043-296 is also in Boyle et al. 1990 and Anderson et al., 1991.
# 0043-275 redshift incorrectly stated in Warren et al. 1987a.
# 0049-286 is also in Anderson et al. 1991.
# 0052-297 is also in Anderson et al. 1991.
# 0100-283A is classified as marginally non-stellar.
# 0100-292 is fainter than the sample limit.
# 0101-304 spectral index taken from Schneider, Schmidt, & Gunn 1989.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh [0,1] right ascension (hours) (B1950)
4- 5 I2 min RAm right ascension (minutes)
7- 11 F5.2 s RAs right ascension (seconds)
14 A1 --- DE- [-]! declination sign
15- 16 I2 deg DEd declination (degrees) (B1950)
18- 19 I2 arcmin DEm declination (minutes)
21- 24 F4.1 arcsec DEs declination (seconds)
27- 31 F5.2 mag m(or) 'or' broad-band magnitude
34- 37 F4.2 --- z redshift
40- 42 I3 0.1nm W(Ly1) ? rest-frame equivalent width (EW) of
Lyman-{alpha}/NV blend
44- 45 I2 0.1nm W(CIV) ? rest-frame EW of CIV emission line
47- 51 F5.2 --- alpha ? the spectral index derived from a power-
law fit to the continuum
53 I1 --- REF [1,5] reference (see paper)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID [0-9-]! coordinate name
10- 11 I2 h RAh += right ascension (hours) (B1950)
13- 14 I2 min RAm right ascension (minutes)
16- 20 F5.2 s RAs right ascension (seconds)
22 A1 --- DE- [-]! declination sign
23- 24 I2 deg DEd declination (degrees) (B1950)
26- 27 I2 arcmin DEm declination (minutes)
29- 32 F4.1 arcsec DEs declination (seconds)
34- 37 I4 a DATEy [1986,1988] UT date of observation (year)
39- 42 F4.2 --- z redshift
44- 48 F5.2 mag m(u) broad-band magnitude of 'u'
50- 54 F5.2 mag m(bj) broad-band magnitude of 'bj'
56- 60 F5.2 mag m(v) broad-band magnitude of 'v'
62- 66 F5.2 mag m(or) broad-band magnitude of 'or'
68- 72 F5.2 mag m(r) broad-band magnitude of 'r'
73 A1 --- l_m(i) [>] limit flag of showing that m(i) is the
upper limit
74- 78 F5.2 mag m(i) broad-band magnitude of 'i'
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Historical notes:
19-Jul-1993: Creation of catalogue VII/148 for Tables 1-4 of paper II.
Copy from Hypathia, ADC, NASA. Modified to split Abs/Em W(CIV).
15-Jun-1993: Tables of paper I and II were received from H.Andernach,
IAC, Tenerife, Spain.
The catalogue was provided by courtesy of S.J. Warren to H. Andernach;
it was numbered A129 in H. Andernach's "List of Astronomical Catalogues
and Documents kindly provided on request by various authors"
17-Nov-1993: Creation of catalogues J/ApJS/76/1 and J/ApJS/76/23.
14-Mar-1994: Creation of catalogue VII/182, superseding above ones.
(The date of the latest archiving, see the date of each file.)
13-May-1997: Updated Intro file to ReadMe standard.
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(End) Koichi Nakajima [CDS] 03-Mar-1994 ; Paul Kuin [ADC] 13-May-1997