J/ApJS/193/28 Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011)
Probing the IGM/Galaxy connection.
IV. The LCO/WFCCD galaxy survey of 20 fields surrounding UV-bright quasars.
Prochaska J.X., Weiner B., Chen H.-W., Cooksey K.L., Mulchaey J.S.
<Astrophys. J. Suppl. Ser., 193, 28 (2011)>
=2011ApJS..193...28P 2011ApJS..193...28P
ADC_Keywords: Redshifts ; Spectroscopy ; Galaxies, photometry ; QSOs
Keywords: galaxies: statistics - intergalactic medium -
quasars: absorption lines
Abstract:
We publish the survey for galaxies in 20 fields containing ultraviolet
bright quasars (with zem∼0.1-0.5) that can be used to study the
association between galaxies and absorption systems from the low-z
intergalactic medium (IGM). The survey is magnitude limited
(R∼19.5mag) and highly complete out to 10' from the quasar in each
field. It was designed to detect dwarf galaxies (L∼0.1L*) at an impact
parameter ρ∼1Mpc (z=0.1) from a quasar. The complete sample (all
20 fields) includes R-band photometry for 84718 sources and confirmed
redshifts for 2800 sources. This includes 1198 galaxies with
0.005<z<(zem-0.01) at a median redshift of 0.18, which may
associated with IGM absorption lines. All of the imaging was acquired
with cameras on the Swope 40" telescope and the spectra were obtained
via slit mask observations using the WFCCD spectrograph on the Dupont
100" telescope at Las Campanas Observatory.
Description:
We selected 20 fields accessible from Las Campanas Observatory (LCO)
(DEC<25°) surrounding UV-bright quasars. These quasars and their
UV spectroscopic data sets are summarized in Table 1.
All of the fields in our survey were imaged with the Swope 40"
telescope using a direct imaging camera in B and R filter. The data
were obtained in a series of dithered exposures intended to map at
least a 20'x20' FOV, between 2000 Oct 26 and 2003 Apr 8.
We performed multi-slit spectroscopy on each field with the WFCCD
spectrometer using the blue grism and the Tek 5 CCD, between 2001 Apr
17 and 2003 Jun 6.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 20 Summary of fields surveyed
table4.dat 108 1458 Summary of galaxies at z<zem+0.01
table5.dat 71 2396 Q0026+1259: object summary
table6.dat 71 3541 Ton S 180: object summary
table7.dat 71 2420 Ton S 210: object summary
table8.dat 71 2983 PKS0312-770: object summary
table9.dat 71 3891 PKS0558-504: object summary
table10.dat 71 2608 PG1004+130: object summary
table11.dat 71 3206 HE1029-140: object summary
table12.dat 71 3547 PG1116+215: object summary
table13.dat 71 4184 PG1211+143: object summary
table14.dat 71 5008 PG1216+069: object summary
table15.dat 71 5293 3C273: object summary
table16.dat 71 2817 Q1230+095: object summary
table17.dat 71 3530 PKS1302-102: object summary
table18.dat 71 3030 PG1307+085: object summary
table19.dat 71 4080 MRK1383: object summary
table20.dat 71 3823 Q1553+113: object summary
table21.dat 71 7846 PKS2005-489: object summary
table22.dat 71 3569 FJ2155-092: object summary
table23.dat 71 3833 PKS2155-304: object summary
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See also:
J/MNRAS/392/1181 : BV(RI)c photometry of 3C 273 (Dai+, 2009)
J/ApJ/676/262 : PKS1302-102 intergalactic absorption system (Cooksey+, 2008)
J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)
J/A+A/469/503 : VRIJHK observations of PKS 2155-304 (Dolcini+, 2007)
J/ApJ/643/680 : Imaging and spectroscopy around PKS 0405-123 (Prochaska+,
2006)
J/ApJ/617/718 : Atomic data and EW for PKS 0405-123 (Prochaska+, 2004)
J/ApJS/155/351 : Absorption toward PG 1116+215 (Sembach+, 2004)
http://www.ucolick.org/~xavier/WFCCDOVI/ : WFCCD OVI database online
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Field Quasar identification
13- 14 I2 h RAh Hour of right ascension (J2000)
16- 17 I2 min RAm Minute of right ascension (J2000)
19- 22 F4.1 s RAs Second of right ascension (J2000)
24 A1 --- DE- Sign of the declination (J2000)
25- 26 I2 deg DEd Degree of declination (J2000)
28- 29 I2 arcmin DEm Arcminute of declination (J2000)
31- 32 I2 arcsec DEs Arcsecond of declination (J2000)
34- 38 F5.3 --- ze Emission redshift
40- 83 A44 --- Set HST UV spectroscopic data sets
85- 87 I3 ks Tint ? FUSE total integration time
89- 92 F4.1 mag Rmax Maximum R-band magnitude
94- 96 I3 --- Nspec Number of spectroscopically determined galaxy
redshifts for objects with 0.005<z<zem
98-100 I3 --- C5 Completeness percent of the spectroscopic
survey in each field to R=19.5mag for a
radius of 5'
102-103 I2 --- C10 Completeness percent of the spectroscopic
survey in each field to R=19.5mag for a
radius of 10'
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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- 11 A11 --- Field Field name
13- 43 A31 --- zRange Range in redshift considered
45- 61 A17 --- ID Galaxy identification (Field_NNNNN)
63- 64 I2 h RAh Hour of right ascension (J2000)
66- 67 I2 min RAm Minute of right ascension (J2000)
69- 72 F4.1 s RAs Second of right ascension (J2000)
74 A1 --- DE- Sign of the declination (J2000)
75- 76 I2 deg DEd Degree of declination (J2000)
78- 79 I2 arcmin DEm Arcminute of declination (J2000)
81- 82 I2 arcsec DEs Arcsecond of declination (J2000)
84- 90 F7.5 --- z Galaxy redshift
92- 96 F5.2 --- Lstar Relative luminosity (1)
98-102 I5 --- rho Impact parameter (2)
104-108 A5 --- Type Galaxy type (Early, Late or Unkn) (3)
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Note (1): As measured from the apparent R-band magnitude and redshift
relative to L*. See text for a detailed description.
Note (2): In physical distance. Units are h72-1kpc.
Note (3): The galaxy type is a crude assessment of the spectrum based
on a fit of eigenfunctions. See text for a detailed description.
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Byte-by-byte Description of file: table[5-9].dat table1[0-9].dat table2[0-3].dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Galaxy identification
6- 7 I2 h RAh Hour of right ascension (J2000)
9- 10 I2 min RAm Minute of right ascension (J2000)
12- 15 F4.1 s RAs Second of right ascension (J2000)
17 A1 --- DE- Sign of the declination (J2000)
18- 19 I2 deg DEd Degree of declination (J2000)
21- 22 I2 arcmin DEm Arcminute of declination (J2000)
24- 25 I2 arcsec DEs Arcsecond of declination (J2000)
27- 31 F5.2 mag Bmag ? B band magnitude (not for table 8)
33- 37 F5.2 mag e_Bmag ? Uncertainty in Bmag (not for table 8)
39- 43 F5.2 mag Rmag ? R band magnitude
45- 49 F5.2 mag e_Rmag ? Uncertainty in Rmag
51- 54 F4.2 --- S/G SExtractor star/galaxy classifier (1)
56- 60 F5.1 arcsec2 Area Source area
62 I1 --- flag Binary source flag (2)
64- 71 F8.5 --- z ? Spectroscopic redshift
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Note (1): Values near unity indicate a stellar-like point-spread function.
Note (2): This binary flag is the sum of the following codes:
1 = Survey target (photometry);
2 = Spectrum taken;
4 = Redshift measured.
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Nomenclature note:
Objects are <[PWC2011] JHHMMSS.s+DDMMSS> in Simbad.
History:
From electronic version of the journal
References:
Prochaska et al. Paper I. 2004ApJ...617..718P 2004ApJ...617..718P Cat. J/ApJ/617/718
Chen et al. Paper II. 2005ApJ...629L..25C 2005ApJ...629L..25C
Prochaska et al. Paper III. 2006ApJ...643..680P 2006ApJ...643..680P Cat. J/ApJ/643/680
Prochaska et al. Paper IV. 2011ApJS..193...28P 2011ApJS..193...28P Cat. J/ApJS/193/28
Prochaska et al. Paper V. 2011ApJ...740...91P 2011ApJ...740...91P Cat. J/ApJ/740/91
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 19-May-2011