II/326 Revised SWIRE photometric redshifts (Rowan-Robinson+, 2013)
Revised SWIRE photometric redshifts.
Rowan-Robinson M., Gonzalez-Solares E., Vaccari M., Marchetti L.
<Mon. Not. R. Astron. Soc., 428, 1958-1967 (2013)>
=2013MNRAS.428.1958R 2013MNRAS.428.1958R
=2013yCat.2336....0R 2013yCat.2336....0R
ADC_Keywords: Surveys ; Galaxies, IR ; Galaxies, photometry ; Redshifts
Keywords: galaxies: evolution - galaxies: starburst - galaxies: star formation -
cosmology: observations - infrared: galaxies
Abstract:
We have revised the Spitzer Wide-Area Infrared Extragalactic survey
(SWIRE) Photometric Redshift Catalogue to take account of new optical
photometry in several of the SWIRE areas, and incorporating Two Micron
All Sky Survey (2MASS) and UKIRT Infrared Deep Sky Survey (UKIDSS)
near-infrared data. Aperture matching is an important issue for
combining near-infrared and optical data, and we have explored a
number of methods of doing this. The increased number of photometric
bands available for the redshift solution results in improvements both
in the rms error and, especially, in the outlier rate.
We have also found that incorporating the dust torus emission into the
quasi-stellar object (QSO) templates improves the performance for QSO
redshift estimation. Our revised redshift catalogue contains over 1
million extragalactic objects, of which 26 288 are QSOs.
Description:
The revised SWIRE photometric redshift catalogues for the Lockman,
EN1, EN2 and XMM-LSS areas (plus original catalogues for ES1, CDFS,
VVDS and SXDS areas). (version zcatrev12ff4.dat.gz, 2016)
There are 1160613 lines of data (EN1: 209696, EN2: 117845,
Lock: 220472, XMM-LSS (including VVDS and SXDS): 317136,
ES1: 145698, CDFS: 149766).
The methodology is based on Rowan-Robinson et al.
(2008MNRAS.386..697R 2008MNRAS.386..697R).
Since publication of Rowan-Robinson et al (2008MNRAS.386..697R 2008MNRAS.386..697R) I have
reprocessed the XMM-LSS and and ES1 areas using new photometric data
collected in the Mattia et al. fusion catalogues
(http://www.mattiavaccari.net/df/ ).
XMM benefited from the CFHTLS-T0007 data release and ES1 from the
substantially expanded ESIS BVR Final Data Release.
The number of SWIRE photometric redshifts has increased by 15%. The
quality of the XMM redshifts is significantly improved. The absence of
u-band photometry in ES1 and CDFS means these redshifts are of lower
reliability.
The main change here is the incorporation of SDSS and UKIDSS data into
the solution.
The details of how this was done will be reported in Rowan-Robinson et
al. (2013MNRAS.428.1958R 2013MNRAS.428.1958R) but the main features are:
(1) WFC data treated as in RR08 (Cat. II/290), but revised WFS data
of Gonzalez-Solares et al. (2011MNRAS.416..927G 2011MNRAS.416..927G) used for
EN1, EN2, Lockman. New Megacam data used for XMM-LSS.
(2) SDSS model magnitudes used, aperture corrected by forcing r-band
magnitude to be same as r-WFC.
(3) 2MASS point-source magnitudes used if available, aperture
corrected by using a multiple (0.8) of the WFC r-band
aperture correction. If not, UKIDSS point-source magnitudes
used, aperture corrected by using a multiple (1.1) of the
WFC r-band aperture correction.
(4) IRAC fluxes are aperture corrected as in Rowan-Robinson et al.
(2008MNRAS.386..697R 2008MNRAS.386..697R).
(5) Lockman data are from 2008 reduction, with requirement that
S(3.6)>7.5µJy.
(6) SXDS sources with new Megacam data are reanalyzed using
Subaru+Megacam data (40553 sources).
The remainder (13655 sources) are from the 2008 reduction.
New spectroscopic redshifts from Chris Simpson (2012 in prep)
are incorporated.
(7) For quasars we have added AGN dust torus templates to our 3 QSO
templates, with amplitudes corresponding to
Ltor/Lopt = 0, 0.2, 0.4, 0.6, 0.8, 1.0, and used 1.25-8.0µm
data in the redshift solution. This improves the outlier rejection
(see the paper for details).
(8) Although the redshifts have not changed greatly from the 2008
catalogue, it was necessary to rerun the infrared template
fitting in order to register the correct infrared luminosity,
ir sed type and derived quantities like star formation rate,
dust mass and stellar mass. It is planned to refine the template
fitting to take into account the lessons of the IRS line
diagnostics (Rowan-Robinson and Efstathiou, 2009MNRAS.399..615R 2009MNRAS.399..615R).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
zcatrev.dat 1479 1152665 Revised SWIRE photometric redshift catalogues
--------------------------------------------------------------------------------
See also:
II/255 : SWIRE ELAIS N1 Source Catalogs (Surace+, 2004)
III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)
J/MNRAS/351/1290 : ELAIS: final band-merged catalogue (Rowan-Robinson+, 2004)
J/AJ/128/1483 : Optical properties of CLASXS X-ray sample (Steffen+, 2004)
J/AJ/129/1198 : SDSS quasars in SWIRE ELAIS N1 field (Hatziminaoglou+, 2005)
J/AJ/129/2074 : Faint Chandra sources in SWIRE (Franceschini+, 2005)
J/A+A/467/565 : z=1-3 ULIRGs from the Spitzer SWIRE survey (Berta+, 2007)
J/A+A/476/151 : SWIRE ELAIS-S1 IR-peak galaxy IR fluxes (Berta+, 2007)
J/MNRAS/379/1343 : UKIDSS massive supercluster infrared study (Swinbank+, 2007)
J/MNRAS/386/1252 : SWIRE/SDSS quasars (Hatziminaoglou+, 2008)
Byte-by-byte Description of file: zcatrev.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 I8 --- IR [2/714568] Infrared identifier
10- 17 I8 --- Opt [0/13182599] Optical identifier
19- 29 F11.6 deg RAdeg Right ascension (J2000)
31- 41 F11.6 deg DEdeg Declination (J2000)
43- 52 F10.2 uJy S3.6 ?=-99 Spitzer/IRAC flux density at 3.6um
54- 63 F10.2 uJy S4.5 ?=-99 Spitzer/IRAC flux density at 4.5um
65- 74 F10.2 uJy S5.8 ?=-99 Spitzer/IRAC flux density at 5.8um
76- 85 F10.2 uJy S8.0 ?=-99 Spitzer/IRAC flux density at 8.0um
87- 96 F10.2 uJy S24 ?=-99 Spitzer/MIPS flux density at 24um
98-107 F10.2 uJy S70 ?=-99 Spitzer/MIPS flux density at 70um
109-118 F10.2 uJy S160 ?=-99 Spitzer/MIPS flux density at 160um
120-129 F10.2 uJy e_S3.6 []?=-99 rms uncertainty on S3.6
131-140 F10.2 uJy e_S4.5 []?=-99 rms uncertainty on S4.5
142-151 F10.2 uJy e_S5.8 []?=-99 rms uncertainty on S5.8
153-162 F10.2 uJy e_S8.0 []?=-99 rms uncertainty on S8.0
164-173 F10.2 uJy e_S24 ?=-99 rms uncertainty on S24
175-184 F10.2 uJy e_S70 ?=-99 rms uncertainty on S70
186-195 F10.2 uJy e_S160 ?=-99 rms uncertainty on S160
197-204 F8.2 mag Umag ?=-99 SWIRE U magnitude (am1) (1)
206-213 F8.2 mag gmag ?=-99 SWIRE g magnitude (am2) (1)
215-222 F8.2 mag rmag ?=-99 SWIRE r magnitude (am3) (1)
224-231 F8.2 mag imag ?=-99 SWIRE i magnitude (am4) (1)
233-240 F8.2 mag Zmag ?=-99 SWIRE Z magnitude (am5) (1)
242-249 F8.2 mag e_Umag ?=-99 rms uncertainty on Umag
251-258 F8.2 mag e_gmag ?=-99 rms uncertainty on gmag
260-267 F8.2 mag e_rmag ?=-99 rms uncertainty on rmag
269-276 F8.2 mag e_imag ?=-99 rms uncertainty on imag
278-285 F8.2 mag e_Zmag ?=-99 rms uncertainty on Zmag
287-294 F8.2 mag umag2 ?=-99 u magnitude (am21) (1)
296-303 F8.2 mag gmag2 ?=-99 g magnitude (am22) (1)
305-312 F8.2 mag rmag2 ?=-99 r magnitude (am23) (1)
314-321 F8.2 mag imag2 ?=-99 i magnitude (am25) (1)
323-330 F8.2 mag zmag2 ?=-99 z magnitude (am26) (1)
332-339 F8.2 mag e_umag2 ?=-99 rms uncertainty on umag2
341-348 F8.2 mag e_gmag2 ?=-99 rms uncertainty on gmag2
350-357 F8.2 mag e_rmag2 ?=-99 rms uncertainty on rmag2
359-366 F8.2 mag e_imag2 ?=-99 rms uncertainty on imag2
368-375 F8.2 mag e_zmag2 ?=-99 rms uncertainty on zmag2
377-384 F8.2 mag Jmag ?=-99 J magnitude (am6) (1)
386-393 F8.2 mag Hmag ?=-99 H magnitude (am7) (1)
395-402 F8.2 mag Kmag ?=-99 K magnitude (am8) (1)
404-411 F8.2 mag e_Jmag ?=-99 rms uncertainty on Jmag
413-420 F8.2 mag e_Hmag ?=-99 rms uncertainty on Hmag
422-429 F8.2 mag e_Kmag ?=-99 rms uncertainty on Kmag
433-434 I2 --- mst [-5/5] Stellar flag (-1=star, 1=galaxy,
0=indeterminate)
436-443 F8.3 mag dmag ? Aperture correction in magnitudes,
applied to all bands
445-452 F8.3 mag dmag1 Other aperture correction in magnitudes
454-456 I3 --- J1 [1/36] Optical template type (1-11 galaxies,
13-30 QSOs) for AV=0 solution (2)
458-464 F7.3 --- alz [0/0.85] log(1+zph) for AV=0 solution
466-475 F10.3 --- err0 Reduced chi2 for AV=0 solution
477-479 I3 --- J2 [1/36] Optical template type (1-11 galaxies,
13-15 QSOs) for free AV solution (2)
481-487 F7.3 --- alz2 [0/0.85] log(1+zph) for free AV solution
489-494 F6.2 mag AV1 Absorption in V band
496-505 F10.3 --- err1 Reduced chi2 for free AV solution
507-509 I3 --- N91 [1/17] Total number of photometric bands
in solution
511-513 I3 --- Nopt [-9/10] Number of optical bands in solution
515-522 F8.2 mag BMAG ?=0.00 MB (corrected for extinction) for
free AV solution
524-531 F8.2 [Lsun] logLB B-band luminosity
533-542 F10.5 --- zsp ?=0.00000 Spectroscopic redshift
544-547 I4 --- q_zsp [0/219] Redshift class (VVDS) (3)
549-552 I4 --- r_zsp [-9/40] Reference for zsp (3)
554-556 I3 --- NIR [0/6] Number of bands with infrared excess
558-563 F6.2 --- alp1 [0/1]? Relative amplitude of cirrus component
at 8um (alp1+alp2+alp3+alp4=1)
565-570 F6.2 --- alp2 [0/1]? Relative amplitude of M82 starburst
component at 8um
572-577 F6.2 --- alp3 [0/1]? Relative amplitude of AGN dust torus
component at 8um
579-584 F6.2 --- alp4 [0/1]? Relative amplitude of A220 starburst
component at 8um
586-595 F10.3 --- errIR Reduced chiν2 of infrared template fit
597-604 F8.2 [Lsun] logL1 ?=0.00 Cirrus component luminosity (1-1000um)
606-613 F8.2 [Lsun] logL2 ?=0.00 M82 starburst component luminosity
615-622 F8.2 [Lsun] logL3 ?=0.00 AGN dust torus component luminosity
624-631 F8.2 [Lsun] logL4 ?=0.00 A220 component luminosity,
633-640 F8.2 [Lsun] logLIR ?=0.00 Infrared luminosity,
642-644 I3 --- IRt [1/6] IR template type (4)
646-650 F5.2 [mJy] logS70 ?=0.00 Predicted flux density at 70um
652-657 F6.2 [mJy] logS160 ?=0.00 Predicted flux density at 160um
659-664 F6.2 [mJy] logS350 ?=0.00 Predicted flux density at 350um
666-671 F6.2 [mJy] logS450 ?=0.00 Predicted flux density at 450um
673-678 F6.2 [mJy] logS850 ?=0.00 Predicted flux density at 850um
680-685 F6.2 [mJy] logS1250 ?=0.00 Predicted flux density at 1250um
687-692 F6.2 [Lsun] logL3.6 Luminosity at 3.6um
694-699 F6.2 [Msun] logM* Stellar mass
701-706 F6.2 [Msun/yr] logSFR ?=-9.99 Star formation rate
708-713 F6.2 [Msun] logMdust ?=0.00 Dust mass
715-1479 85F9.2 --- chi2A ?=-99.00 Array of reduced χν2 as
function of alz2, minimized over all
templates, in bins of 0.01 in
log(1+zph), from 0.01 to 0.85
--------------------------------------------------------------------------------
Note (1): Magnitudes are aperture corrected.
UgriZ magnitudes are AB magnitudes for XMM-LSS field,
Vega for all the other fields.
Table 1: Explanation of magnitude fields
----------------------------------------------------------------------
Field am1-5[UgriZ] am21-26[ugriz2] am6-8[JHK]
----------------------------------------------------------------------
EN1 Rev. WFC UgriZ SDSS ugriz 2MASS/UKIDSS JHK
EN2 Rev. WFC UgriZ SDSS ugriz 2MASS JHK
Lock Rev. SWIRE Ugri SDSS ugriz 2MASS/UKIDSS JHK
VVDS VVDS ugri UBVRI VVDS JK
SXDS Subaru MegaCam ugriz -
XMM SWIRE UgriZ(AB) MegaCam ugriz UKIDSS JHK
CDFS SWIRE gri - -
S1 SWIRE B, V, R - -
----------------------------------------------------------------------
Note (2): Optical template type:
J=13-15, 16-18, 19-21, 22-24, 25-27, 28-30, correspond to
Ltor/Lopt=0, 0.2, 0.4, 0.6, 0.8, 1. respectively.
Note (3): Spectroscopic redshift references:
* N1,N2 regions:
1 = Perez-Fournon et al. (2004, in prep.), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
2 = Serjeant et al. (2004MNRAS.355..813S 2004MNRAS.355..813S), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
3 = La Franca et al. (2005ApJ...635..864L 2005ApJ...635..864L), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
4 = Pozzi et al. (2003MNRAS.343.1348P 2003MNRAS.343.1348P), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
5 = NED, http://nedwww.ipac.caltech.edu/ , from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
6 = Morel et al. (2001MNRAS.327.1187M 2001MNRAS.327.1187M), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
7 = SLOAN Survey, from Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
8 = Willott et al. (2003MNRAS.339..397W 2003MNRAS.339..397W), from
Rowan-Robinson et al., 2004, Cat. J/MNRAS/351/1290
9 = Chapman et al. (2002ApJ...573...66C 2002ApJ...573...66C), Sajina et al.
(2003MNRAS.343.1365S 2003MNRAS.343.1365S), from Rowan-Robinson et al., 2004,
Cat. J/MNRAS/351/1290
11 = Keck redshifts (Berta et al 2007, Cat. J/A+A/467/565)
20 = WIYN redshifts (Trichas et al., 2007)
25 = GMOS redshifts (Trichas et al., 2007)
30 = Swinbank et al. 2007, Cat. J/MNRAS/379/1343
35 = Le Fevre et al. 2005, VVDS (III/250)
* VVDS (3-14 VVDS quality flags):
3 = 95% confidence
4 = 100% confidence
9 = Single isolated emission line spectra
+10 = a primary QSO target
+210 = secondary QSO identified target
* Lockman region:
-1 = Unobserved (Steffen et al., 2004, Cat. J/AJ/128/1483)
1 = Star-former (Steffen et al., 2004, Cat. J/AJ/128/1483)
2 = Seyfert 2 based on strong [O II] relative to Hβ or strong
[Ne III] relative to [O II] (Steffen et al., 2004, J/AJ/128/1483)
3 = Seyfert 2 with [Ne V] or C IV in emission
(Steffen et al., 2004, Cat. J/AJ/128/1483)
4 = Broad-line AGN (FWHM>1000km/s)
(Steffen et al., 2004, Cat. J/AJ/128/1483)
5 = NED, http://nedwww.ipac.caltech.edu/
10 = WIYN, Keck, Gemini redshifts (Smith et al., in prep.)
11 = Keck redshifts (Berta et al., 2007, Cat. J/A+A/467/565)
* XMM, CDFS regions:
5 = NED, http://nedwww.ipac.caltech.edu/
Note (4): IR template type as follows:
1 = dominated by cirrus
2 = M82 starburst
3 = A220 starburst
4 = AGN dust torus
5 = single band excess
6 = no excess
--------------------------------------------------------------------------------
History:
* 06-Nov-2013: Copied from
http://astro.ic.ac.uk/public/mrr/swirephotzcat/zcatrev12ff3r.dat.gz
* 22-May-2018: revized version copied from
http://mattiavaccari.net/dropoff/mrr13/zcatrev12ff4.fits.gz
* 09-Nov-2018: revized version copied from
http://mattiavaccari.net/df/mrr/zcatrev12ff5.fits.gz
References:
Rowan-Robinson et al., Paper I, 2008MNRAS.386..697R 2008MNRAS.386..697R
(End) Patricia Vannier [CDS] 06-Nov-2013