J/MNRAS/392/19 The 2dF-SDSS QSO survey (Croom+, 2009)
The 2dF-SDSS LRG and QSO survey: the spectroscopic QSO catalogue.
Croom S.M., Richards G.T., Shanks T., Boyle B.J., Sharp R.G.,
Bland-Hawthorn J., Bridges T., Brunner R.J., Cannon R., Carson D., Chiu K.,
Colless M., Couch W., De Propris R., Drinkwater M.J., Edge A., Fine S.,
Loveday J., Miller L., Myers A.D., Nichol R.C., Outram P., Pimbblet K.,
Roseboom I., Ross N., Schneider D.P., Smith A., Stoughton C., Strauss M.A.,
Wake D.
<Mon. Not. R. Astron. Soc., 392, 19-44 (2009)>
=2009MNRAS.392...19C 2009MNRAS.392...19C
ADC_Keywords: Surveys ; QSOs ; Photometry, SDSS ; Redshifts
Keywords: catalogues - surveys - white dwarfs - galaxies: active -
quasars: general - galaxies: Seyfert
Abstract:
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG
(luminous red galaxy) and QSO (2SLAQ) survey. This is a deep,
18<g<21.85 (extinction corrected), sample aimed at probing in detail
the faint end of the broad line active galactic nuclei luminosity
distribution at z≤2.6. The candidate QSOs were selected from SDSS
photometry and observed spectroscopically with the 2dF spectrograph on
the Anglo-Australian Telescope. This sample covers an area of 191.9
deg2 and contains new spectra of 16326 objects, of which 8764 are
QSOs and 7623 are newly discovered [the remainder were previously
identified by the 2dF QSO Redshift Survey (2QZ) and SDSS]. The full
QSO sample (including objects previously observed in the SDSS and 2QZ
surveys) contains 12702 QSOs. The new 2SLAQ spectroscopic data set
also contains 2343 Galactic stars, including 362 white dwarfs, and
2924 narrow emission-line galaxies with a median redshift of z=0.22.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
2slaqqso.dat 355 54457 2SLAQ spectroscopic catalogue, built using
add_IDs.pl version 1.2 (2008/02/16)
repeats.dat 94 7065 2SLAQ spectroscopic catalogue of objects with
repeated observations, built using add_IDs.pl
version 1.2 (2008/10/01)
colcomp.dat 35 915 2SLAQ colour completeness array
tablea1.dat 54 99 The observed 2dF field centres in the 2SLAQ
survey with dates observed
--------------------------------------------------------------------------------
See also:
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/372/425 : 2dF-SDSS Luminous Red Galaxy Survey, 2SLAQ (Cannon+, 2006)
J/MNRAS/381/211 : Radio galaxies in the 2SLAQ LRG Survey (Sadler+, 2007)
Byte-by-byte Description of file: 2slaqqso.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Source name (JHHMMSS.ss+DDMMSS.s)
21 I1 --- Pr [3/6] Configuration priority for 2dF
23- 32 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
34- 43 F10.6 deg DEdeg Declination in decimal degrees (J2000)
45- 48 I4 --- Run SDSS Run number
50- 51 I2 --- Rerun SDSS Rerun number
53 I1 --- Camcol SDSS camera number
55- 57 I3 --- Field SDSS Field number
59- 62 I4 --- ID SDSS object id within a field
64- 71 F8.3 pix Ypos SDSS CCD Y position
73- 80 F8.3 pix Xpos SDSS CCD X position
83- 88 F6.3 mag umag SDSS PSF u magnitude (1)
90- 95 F6.3 mag gmag SDSS PSF g magnitude (1)
97-102 F6.3 mag rmag SDSS PSF r magnitude (1)
104-109 F6.3 mag imag SDSS PSF i magnitude (1)
111-116 F6.3 mag zmag SDSS PSF z magnitude (1)
119-123 F5.3 mag e_umag ?=9.999 rms uncertainty on umag
125-129 F5.3 mag e_gmag ?=9.999 rms uncertainty on gmag
131-135 F5.3 mag e_rmag ?=9.999 rms uncertainty on rmag
137-141 F5.3 mag e_imag ?=9.999 rms uncertainty on imag
143-147 F5.3 mag e_zmag ?=9.999 rms uncertainty on zmag
150-154 F5.3 mag ured Extinction in u band
156-160 F5.3 mag gred Extinction in g band
162-166 F5.3 mag rred Extinction in r band
168-172 F5.3 mag ired Extinction in i band
174-178 F5.3 mag zred Extinction in z band
180-187 F8.5 --- S/G ?=-1. SDSS Bayesian star-galaxy
classification probability
189 I1 --- Cl [3,6] SDSS Object image morphology
classification. 3 = galaxy, 6 = star
191-197 F7.4 --- zem.S ?=-1. SDSS emission spectroscopic redshift
199-207 A9 --- ID.S ?=- SDSS spectroscopic classification
210-215 F6.4 ---- q_zem.S [0/1] SDSS spectroscopic quality flag,
from 0 (bad) to 1 (good)
218-222 F5.2 mag bj ?=0. 2QZ bJ magnitude (Smith et al.
2005MNRAS.359...57S 2005MNRAS.359...57S)
224-230 F7.4 --- zem2q ?=-1. 2QZ emission spectroscopic redshift
(Croom et al., Cat. VII/241)
232-240 A9 --- ID2q ?=- 2QZ spectroscopic classification
243 I1 --- q_ID2q ? 2QZ ID quality flag (2)
244 I1 --- q_zem2q ? 2QZ redshift quality flag (2)
246-248 A3 --- --- [2QZ- ]
249-265 A17 --- 2QZ 2QZ name (JHHMMSS.s+DDMMSS, Cat. VII/241)
267-273 F7.4 --- z2S ?=-1. 2SLAQ spectroscopic redshift
275 I1 --- q_ID2S ? 2SLAQ ID quality flag (2)
276 I1 --- q_z2S ?=0 2SLAQ redshift quality flag (2)
278-287 A10 --- ID2S ?=- 2SLAQ spectroscopic ID
(i.e. QSO, NELG, star etc.)
289-294 A6 "YYMMDD" Date ?=- 2SLAQ spectroscopic observation date
296-298 A3 --- Fl2S ?=- 2SLAQ spectroscopic field
300-302 I3 --- Fb2S [0/357] 2SLAQ spectroscopic fibre number
305-310 F6.2 --- S/N 2SLAQ spectroscopic S/N in a 4000-5000Å
band
313-317 F5.2 mag dmag ?=99. 2SLAQ (gm mag)-(fibre mag) relative
to mean zero point in field
320-325 F6.4 10-16W/m2 FX RASS X-ray flux (in 10-13erg/cm2/s)
327-332 F6.1 mJy F1.4 FIRST 1.4 GHz Radio flux
334 I1 --- n_F1.4 [0/3] FIRST morphology (3)
336-355 A20 --- Com ?=- 2SLAQ comment on spectrum
--------------------------------------------------------------------------------
Note (1): no extinction correction
Note (2): Quality flag is:
1 = high-quality ID or redshift
2 = poor-quality ID or redshift
3 = no ID or redshift assignment
Note (3): FIRST morphology flag as follows:
0 = no detection
1 = unresolved
2 = extended
3 = multiple
--------------------------------------------------------------------------------
Byte-by-byte Description of file: repeats.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 20 A19 --- Name IAU format object name
22- 27 F6.4 --- z 2SLAQ spectroscopic redshift
29 I1 --- q_ID 2SLAQ spectroscopic quality (ID quality)
30 I1 --- q_z 2SLAQ spectroscopic quality (redshift quality)
32- 40 A9 --- ID 2SLAQ spectroscopic ID
(i.e. QSO, NELG, star etc.)
43- 48 I6 "YYMMDD" Date 2SLAQ spectroscopic observation date (YYMMDD)
50- 52 A3 --- Fld 2SLAQ spectroscopic field
54- 56 I3 --- Fbr 2SLAQ spectroscopic fibre number
59- 64 F6.2 --- S/N 2SLAQ spectroscopic S/N in a 4000-5000Å band
67- 71 F5.2 mag dmag ?=99. 2SLAQ (gm mag)-(fibre mag) relative to
mean zero point in field
73 I1 --- N Number of observations for this object
75- 94 A20 --- Com ?=- 2SLAQ comment on spectrum
--------------------------------------------------------------------------------
Byte-by-byte Description of file: colcomp.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 7 F5.3 --- z Redshift
9- 14 F6.3 mag gmag SDSS g magnitude
17- 21 F5.3 --- Comp [0,1] Completeness (function of z and gmag)
23- 28 F6.3 mag gmaghost Mean host contribution in terms of mags (g-band)
31- 35 F5.3 mag imaghost Mean host contribution in terms of mags (i-band)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Fld 2SLAQ field name
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 12 I2 s RAs Right ascension (J2000)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 22 I2 arcsec DEs Declination (J2000)
24- 28 A5 "MM/YY" Date Date of observation
30- 32 I3 --- Nobs1 Primary sample number of 2SLAQ QSO candidates
observed
34- 36 I3 ---- NQ1 Primary sample number of good quality QSO IDs
(ID quality 1)
38- 41 F4.1 % Nf11 Primary sample fraction of good quality IDs
(quality 1) for all object types
43- 45 I3 --- NobsA All number of 2SLAQ QSO candidates observed
47- 49 I3 --- NQA All number of good quality QSO IDs
(ID quality 1)
51- 54 F4.1 % Nf1A All fraction of good quality IDs (quality 1)
for all object types
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Oct-2009