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J/ApJ/559/654       Lyα absorption systems. V.          (Chen+, 2001)

The gaseous extent of galaxies and the origin of Lyα absorption systems. V. Optical and near-infrared photometry of lyα-absorbing galaxies at z<1. Chen H.-W., Lanzetta K.M., Webb J.K., Barcons X. <Astrophys. J. 559, 654 (2001)> =2001ApJ...559..654C
ADC_Keywords: QSOs ; Redshifts ; Equivalent widths Keywords: galaxies: evolution - galaxies: halos - galaxies: ISM - quasars: absorption lines Abstract: We present results of a program to obtain and analyze HST WFPC2 images and ground-based images of galaxies identified in an imaging and spectroscopic survey of faint galaxies in fields of HST spectroscopic target QSOs. Here we present the additional HST WFPC2 observations of galaxies in 10 QSO fields that were not included in Paper I (Chen et al., 1998, Cat. J/ApJ/498/77) and near-infrared imaging observations of galaxies in 15 QSO fields. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file object.dat 71 20 List of all QSOs table3.dat 110 157 Galaxies and Absorption Systems
See also: J/ApJ/498/77 : Lyα absorption systems. III. (Chen+, 1998) Byte-by-byte Description of file: object.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Field Field (QSO) designation 11- 12 I2 h RAh Right ascension (J2000.0) 14- 15 I2 min RAm Right ascension (J2000.0) 17- 20 F4.1 s RAs Right ascension (J2000.0) 22 A1 --- DE- Declination sign (J2000.0) 23- 24 I2 deg DEd Declination (J2000.0) 26- 27 I2 arcmin DEm Declination (J2000.0) 29- 32 F4.1 arcsec DEs Declination (J2000.0) 34- 38 F5.3 --- zem ? Emission redshift(1) 40- 44 A5 --- Filter [F702W ] Filter (1) 46- 49 I4 s TExp ? Exposition time (1) 51- 60 A10 "YYYY/MM/DD" Date Observation date (1) 62- 71 A10 "YYYY/MM/DD" Date2 Second observation date (1)
Note (1): Data from table1.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Field Galaxy field (QSO) name (1) 11- 15 F5.1 arcsec oRA Right Ascension offset from the QSO (1) 17- 21 F5.1 arcsec oDE Declination offset from the QSO (1) 23- 28 F6.4 --- z Galaxy redshift 30- 34 F5.1 kpc Rho Impact parameter in units of kpc/h 36- 38 F3.1 kpc DRad ? Effective disk radius in units of kpc/h 40- 42 F3.1 kpc BRad ? Effective bulge radius in units of kpc/h 44 A1 --- l_D/B Limit flag in D/B 45- 48 F4.1 --- D/B ? Disk to Bulge ratio 50- 54 F5.1 deg Alpha ? Orientation angle 56- 59 F4.1 deg Inc ? Inclination angle 61- 64 F4.2 --- b/a ? Bulge axis ratio 66- 69 F4.1 mag Wmag ? The WFPC2 apparent magnitude (F702W/F606W) 71- 74 F4.1 mag/arcsec2 SB ? Rest-frame B band mean surface brightness 76- 80 F5.1 mag BMAG ? Absolute B band magnitude minus 5*log[h] 82- 85 F4.1 mag Kmag ? The K band apparent magnitude 87- 91 F5.1 mag KMAG ? Absolute K band magnitude minus 5*log[h] 93- 98 F6.4 --- zabs ? Absorber redshift 100 A1 --- l_EWLya Limit flag on EWLya 101-104 F4.2 0.1nm EWLya ? Lyα rest-frame equivalent width (2) 106 A1 --- l_EWCIV Limit flag on EWCIV 107-110 F4.2 0.1nm EWCIV ? The C IV (1548Å) rest-frame equivalent width (2)
Note (1): In Simbad, objects are identified as [CLW98] HHMM+DDMM +xxxxx+yyyyy Note (2): NULL values represent cases for which the absorption measurement cannot be made, either because the galaxy occurs behind the QSO, the appropriate QSO spectrum is not available or lacks sensitivity, the spectral region containing the predicted Lyα or CIV line is blended with other absorption lines, or a corresponding Lyα or CIV absorption line was paired with a galaxy at a smaller impact parameter.
History: From electronic version of the journal References: Lanzetta et al., Paper I 1995ApJ...442..538L Lanzetta et al., Paper II 1996ApJ...456L..17L Chen et al., Paper III 1998ApJ...498...77C, Cat. J/ApJ/498/77 Ortiz-Gil et al., Paper IV 1999ApJ...523...72O
(End) James Marcout, Patricia Bauer [CDS] 14-Jan-2002
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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