J/ApJ/648/L97 2 SDSS QSOs supersolar super-Lyman limit systems (Prochaska+ 2006)
Supersolar super-Lyman limit systems.
Prochaska J.X., O'Meara J.M., Herbert-Fort S., Burles S., Prochter G.E.,
Bernstein R.A.
<Astrophys. J., 648, L97-L100 (2006)>
=2006ApJ...648L..97P 2006ApJ...648L..97P
ADC_Keywords: QSOs ; Spectroscopy ; Abundances, peculiar
Keywords: quasars: absorption lines
Abstract:
We present abundance measurements for two super-Lyman limit systems
(SLLSs; quasar absorption-line systems with
1019cm-2<NHI<1020.3cm-2) selected from a set of metal-strong
absorbers in the SDSS quasar database.
Description:
We observed the quasars SDSS J0927+5621 and J0953+5230 on UT 2005
April 13 and March 17 for total exposure times of 7200 and 8400s,
respectively, with the upgraded HIRES on the Keck I telescope.
Objects:
--------------------------------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------------------------------
09 27 05.91 +56 21 14.1 SDSS J0927+5621 = SDSS J092705.90+562114.1
09 53 09.05 +52 30 29.7 SDSS J0953+5230 = SDSS J095309.05+523029.7
--------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 75 33 Ionic Column Densities
--------------------------------------------------------------------------------
See also:
II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Ion Ion identification
6- 13 F8.3 0.1nm lambda Wavelength in Angstroms
15 A1 --- f_logCD1 Flag on logCD1 (1)
17 A1 --- l_logCD1 Limit flag on logCD1
18- 22 F5.2 [cm-2] logCD1 ? Log of the column density for J0927+5621 (2)
24- 27 F4.2 [cm-2] e_logCD1 ? rms uncertainty in logCD1
29 A1 --- l_logwCD1 Limit flag on logwCD1
30- 34 F5.2 [cm-2] logwCD1 ? Log of the weighted mean or stringet limit
column density for J0927+5621 (2)
36- 39 F4.2 [cm-2] E_logwCD1 ? Upper limit uncertainty in logwCD1
41- 44 F4.2 [cm-2] e_logwCD1 ? rms uncertainty (or lower limit) in logwCD1
46 A1 --- f_logCD2 Flag on logCD2 (1)
48 A1 --- l_logCD2 Limit flag on logCD2
49- 53 F5.2 [cm-2] logCD2 ? Log of the column density for J0953+5230 (2)
55- 58 F4.2 [cm-2] e_logCD2 ? rms ncertainty in logCD2
60 A1 --- l_logwCD2 Limit flag on logwCD2
61- 65 F5.2 [cm-2] logwCD2 ? Log of the weighted mean or stringet limit
column density for J0953+5230 (2)
67- 70 F4.2 [cm-2] E_logwCD2 ? Upper limit uncertainty in logwCD2
72- 75 F4.2 [cm-2] e_logwCD2 ? rms uncertainty (or lower limit) in logwCD2
--------------------------------------------------------------------------------
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): Column densities are measured from the apparent optical depth
method integrated over the entire line-profile.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jul-2008