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J/PASP/118/1077     Metal-strong damped Lyα systems  (Herbert-Fort+, 2006)

The metal-strong damped Lyα systems. Herbert-Fort S., Prochaska J.X., Dessauges-Zavadsky M., Ellison S.L., Howk J.C., Wolfe A.M., Prochter G.E. <Publ. Astron. Soc. Pac., 118, 1077-1097 (2006)> =2006PASP..118.1077H
ADC_Keywords: QSOs ; Redshifts ; Spectroscopy Abstract: We have identified a metal-strong [logN(Zn+)≥13.15 or logN(Si+)≥15.95] damped Lyα (MSDLA) population from an automated quasar (QSO) absorber search in the Sloan Digital Sky Survey (SDSS) Data Release 3 quasar sample and find that MSDLAs comprise \gl5% of the entire DLA population with zabs≥2.2 found in QSO sight lines with r<19.5. We have also acquired 27 Keck ESI (Echellete Spectrograph and Imager) follow-up spectra of metal strong candidates in order to evaluate our automated technique and examine the MSDLA candidates at higher resolution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 75 435 *Metal-strong candidates from SDSS-DR3 tables.dat 61 874 Ionic column densities for 27 sources
Note on table3.dat: systems identified in Simbad as [HPD2006] SDSS JHHMMSS.ss+DDMMSS.s abs N.NNN, where N.NNN is zabs.
See also: VII/243 : SDSS quasar catalog. III. (Schneider+, 2005) http://www.sdss.org/ : SDSS Home Page Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Plate SDSS plate number 6- 10 I5 --- MJD SDSS MJD number 12- 14 I3 --- Fiber SDSS fiber number 16- 17 I2 h RAh Right ascension (J2000) 19- 20 I2 min RAm Right ascension (J2000) 22- 26 F5.2 s RAs Right ascension (J2000) 28 A1 --- DE- Declination sign (J2000) 29- 30 I2 deg DEd Declination (J2000) 32- 33 I2 arcmin DEm Declination (J2000) 35- 38 F4.1 arcsec DEs [0/60] Declination (J2000) 40- 44 F5.2 mag rmag SDSS r magnitude 46- 50 F5.3 --- zem Emission redshift 52- 56 F5.3 --- zabs Absorption redshift 58- 59 I2 --- Qual [0,18] Quality (1) 61 I1 --- Rating [4/5] Metal rating flag (2) 63- 66 A4 --- --- [SDSS] 67- 75 A9 --- Name Name for objects with data in tables.dat
Note (1): The automatically-assigned overall quality from sdss_search; 18 is the highest rating (for metal-strong systems showing corresponding candidate DLAs detected by sdss_dla), otherwise 10.0 for metal-strong systems without Lyα coverage. Three quality points are deducted if no candidate DLA is detected when Lyα coverage is present. Note (2): Metal rating flag determined from visual inspection of our SDSS sample is 4 = strong; 5 = very strong.
Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [SDSS] 5- 13 A9 --- Name Name (HHMM-DDMM) 15- 19 F5.3 --- z Redshift 21- 26 A6 --- Ion Ion designation 28- 35 F8.3 0.1nm lambda Wavelength 37 I1 --- Flag [0/5] Flag on ion detection (1) 39 A1 --- l_logN Limit flag on logN 40- 44 F5.2 [cm-2] logN ? Ionic column density 46- 49 F4.2 [cm-2] e_logN ? rms uncertainty on logN 51 A1 --- l_logNad Limit flag on logNadopt 52- 56 F5.2 [cm-2] logNad ? Adopted ionic column density (2) 58- 61 F4.2 [cm-2] e_logNad ? rms uncertainty on logNadopt
Note (1): Flag as follows: 0 = Non-dominant ion or blended transition 1 = Dominant ion 2 = Saturated, non-dominant ion 3 = Saturated, dominant ion 4 = Upper limit, non-dominant ion 5 = Upper limit, dominant ion Note (2): Weighted mean or most stringent limit
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 14-Dec-2007
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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