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J/A+A/528/A12       QSOs CaII absorbers                      (Richter+, 2011)

The neutral gas extent of galaxies as derived from weak intervening Ca II absorbers. Richter P., Krause F., Fechner C., Charlton J.C., Murphy M.T. <Astron. Astrophys., 528, A12 (2011)> =2011A&A...528A..12R
ADC_Keywords: QSOs ; Redshifts ; Equivalent widths Keywords: galaxies: halos - galaxies: formation - galaxies: ISM - intergalactic medium - quasars: absorption lines Abstract: We present a systematic study of weak intervening CaII absorbers at low redshift (z<0.5), based on the analysis of archival high-resolution (R≥45000) optical spectra of 304 quasars and active galactic nuclei observed with VLT/UVES. Along a total redshift path of {DELTA}z≈100 we detected 23 intervening CaII absorbers in both the CaII H & K lines, with rest frame equivalent widths Wr,3934=15-799mÅ and column densities logN(CaII)=11.25-13.04 (obtained by fitting Voigt-profile components). Description: For our CaII survey we made use of the ESO data archive and retrieved all publically available (as of Sep. 2008) absorption-line data for low- and high-redshift QSOs observed with the Ultraviolet and Visual Echelle Spectrograph (UVES) on the VLT. This enormous data archive (Spectral Quasar Absorption Database, SQUAD; PI: M.T. Murphy) provides high-quality spectral data for ∼400 quasars and active galactic nuclei (AGN). Most of these spectra were taken in the UVES standard configuration using the 1" slit, providing a spectral resolution of R∼45000 (corresponding to a velocity resolution of ∼6.6km/sFWHM). Only a few spectra have been observed at slightly higher spectral resolution, up to R∼60000. The spectral coverage as well as the signal-to-noise ratio (S/N) varies substantially among the spectra, reflecting the various scientific goals of the original proposals. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 66 23 QSO names, redshifts and ions of 23 intervening CaII absorbers at z=0-0.5 detected in our QSO sample table2.dat 75 23 Column densities, absorption components, velocity widths and equivalent widths for the 23 intervening CaII absorbers tablea1.dat 49 69 Results from Voigt-profile fitting of intervening CaII absorbers tablea2.dat 22 11 List of additional CaII candidate systems tablea3.dat 29 304 Complete list of QSOs in our data sample with mean S/N and CaII redshift path (dz)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- QSO QSO name (JHHMMSS+DDMMSS) 16- 27 A12 --- Name Alternative name 29- 35 F7.5 --- zabs Absorption redshift 37- 39 A3 --- Bias [yes no] Bias flag (1) 41- 61 A21 --- IonD Detected ions (2) 64- 66 A3 --- IonU Undetected ions (2)
Note (1): Bias flag indicates whether the observations were targeted observations (see Sect 3.2). Note (2): Only absorption by CaII, MgII, FeII, and NaI is considered in this study.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 14 A14 --- QSO QSO name (JHHMMSS+DDMMSS) 16- 22 F7.5 --- zabs Absorption redshift 24- 28 F5.2 [cm-2] logN(CaII) CaII column density 30- 33 F4.2 [cm-2] e_logN(CaII) rms uncertainty on logN(CaII) 35 I1 --- NCaII Number of CaII absorption components per system; see Table A.1 37- 39 I3 km/s DVCaII CaII velocity width 41- 43 I3 0.1pm W(CaII) CaII 3934Å equivalent width 45- 46 I2 0.1pm e_W(CaII) rms uncertainty on W(CaII) 48- 49 A2 --- l_DVMgII [≥ ] Limit flag on DVMgII 50- 52 I3 km/s DVMgII ?=- MgII velocity width 54- 55 A2 --- l_W(MgII) [≥ ] Limit flag on W(MgII) 56- 59 I4 0.1pm W(MgII) ?=- MgII 2796Å equivalent width 61- 62 I2 0.1pm e_W(MgII) ? rms uncertainty on W(MgII) 64- 65 A2 --- l_logN(NaI) [≤ ] Limit flag on logN(NaI) 66- 70 F5.2 [cm-2] logN(NaI) ?=- NaI column density 72- 75 F4.2 [cm-2] e_logN(NaI) ? rms uncertainty on logN(NaI)
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- QSO QSO name (JHHMMSS+DDMMSS) 16- 22 F7.5 --- zabs Absorption redshift 24 I1 --- Comp [1/9] Composant number 26- 29 I4 km/s RV Radial velocity 31- 35 F5.2 [cm-2] logN(CaII) CaII column density 37- 40 F4.2 [cm-2] e_logN(CaII) rms uncertainty on logN(CaII) 42- 45 F4.1 km/s b Velocity width 47- 49 F3.1 km/s e_b rms uncertainty no b
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 14 A14 --- QSO QSO name (JHHMMSS+DDMMSS) 16- 22 F7.5 --- zabs Absorption redshift
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 19 A15 --- QSO QSO name (JHHMMSS+DDMMSS) 21- 23 I3 --- S/N S/N per resolution element 25- 29 F5.3 --- dz Mean CaII redshift path
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Aug-2011
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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