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VII/182   High-Redshift Quasars (z≥2.2) in SGP and F401    (Warren+ 1991)

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
ADC_Keywords: Galaxy catalogs ; QSOs Abstract: (Paper I) We provide details of a multicolor ( u, bj, v, or, r, i), wide-field, faint magnitude survey for high-redshift (z ≥ 2.2 ) quasars. The survey extends over the magnitude range 16≤mor≤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; see also documentation files "doc.tex" or "doc.txt") In a wide-field multicolor survey (45.7 deg2, 16.0≤mor≤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, bj, v, or, r, i), line-equivalent widths for Lyman-α/NV and CIV, FWHM CIV, 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-α/NV for the complete sample is 67A, and for CIV is 31Å. The median FWHM CIV is 35Å and the median spectral index is α=-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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file adc.sty 78 68 Style file to process doc.tex doc.tex 80 180 ADC documentation file (LaTeX) (II) doc.txt 73 284 ADC documentation file (II) table4.dat 68 30 Known non-UV-excess QSOs in the SGP (paper I) tables.dat 129 130 High-z QSOs in SGP and F401 (paper II, tables 1-4) table5.dat 55 14 previously-known high-z QSOs in SGP (paper II) table6.dat 78 12 new UV excess quasars (paper II)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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 UKST magnitude 31- 35 F5.2 mag m(bj) bj-band UKST magnitude 37- 41 F5.2 mag m(v) v-band UKST magnitude 43- 47 F5.2 mag m(or) or-band (600-690nm) UKST magnitude 49- 53 F5.2 mag m(r) r-band (640-690nm) UKST magnitude 55- 59 F5.2 mag m(i) i-band UKST magnitude 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
Note on r_z: References are: 1 = Anderson et al. 1991 in preparation (1991AJ....102.1627M) 2 = McMahon R., private communication 3 = Savage et al. 1985MNRAS.213..485S 4 = Boyle et al. 1990MNRAS.243....1B 5 = Pocock et al. 1984MNRAS.210..373P 6 = Sargent, Steidel & Boksenberger 1989ApJS...69..703S
Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1 A1 --- Note *[n] 'n' if 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-α/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 --- ueW(CIV) Uncertainty flag (:) on e_W(CIV) 124-128 F5.2 --- alpha ? Spectral index (f(ν) = ν**α) 129 A1 --- u_alpha [: ] Uncertainty flag on α
Note on Note, ID: Notes on individual quasars # 0043-296 is also in Boyle et al. 1990MNRAS.243....1B and Anderson et al. in preparation 1991 (1991AJ....102.1627M) # 0043-275 redshift incorrectly stated in Warren et al. 1987a. # 0049-286 is also in Anderson et al. (1991AJ....102.1627M) # 0052-297 is also in Anderson et al. (1991AJ....102.1627M) # 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 1989AJ.....98.1951S
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
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' UKST (600-690nm) broad-band magnitude 34- 37 F4.2 --- z redshift 40- 42 I3 0.1nm W(Ly1) ?rest-frame equivalent width (EW) of Lyman-α/NV blend 44- 45 I2 0.1nm W(CIV) ?rest-frame EW of CIV emission line 47- 51 F5.2 --- Sp+Index ?the spectral index derived from a power- law fit to the continuum 53 I1 --- Ref *[1,5] reference
Note on Ref: 1 = Anderson et al. 1991 in preparation (1991AJ....102.1627M) 2 = Savage et al. 1985MNRAS.213..485S 3 = Pocock et al. 1984MNRAS.210..373P 4 = McMahon R., private communication 5 = Sargent, Steidel & Boksenberger 1989ApJS...69..703S
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
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 yr DATEy [1986,1988] UT date of observation (year) 39- 42 F4.2 --- z redshift 44- 48 F5.2 mag m(u) broad-band UKST magnitude of 'u' 50- 54 F5.2 mag m(bj) broad-band UKST magnitude of 'bj' 56- 60 F5.2 mag m(v) broad-band UKST magnitude of 'v' 62- 66 F5.2 mag m(or) broad-band UKST magnitude of 'or' (600-690nm) 68- 72 F5.2 mag m(r) broad-band UKST 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'
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 (Paul Kuin, ADC) * 24-Jul-2004: Added missing references (Francois Ochsenbein, CDS)
(End) Koichi Nakajima [CDS] 03-Mar-1994 ; Paul Kuin [ADC] 13-May-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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