J/ApJS/187/560 Photometric redshifts of the 2Ms CDF-S (Luo+, 2010)
Identifications and photometric redshifts of the 2 Ms Chandra Deep Field-South
sources.
Luo B., Brandt W.N., Xue Y.Q., Brusa M., Alexander D.M., Bauer F.E.,
Comastri A., Koekemoer A., Lehmer B.D., Mainieri V., Rafferty D.A.,
Schneider D.P., Silverman J.D., Vignali C.
<Astrophys. J. Suppl. Ser., 187, 560-580 (2010)>
=2010ApJS..187..560L 2010ApJS..187..560L
ADC_Keywords: Cross identifications ; Photometry, UBVRI ; Photometry, infrared ;
Photometry, HST ; Redshifts ; X-ray sources
Keywords: cosmology: observations - galaxies: active - X-rays: galaxies
galaxies: distances and redshifts - galaxies: photometry
Abstract:
We present reliable multiwavelength identifications and high-quality
photometric redshifts for the 462 X-ray sources in the ∼2Ms Chandra
Deep Field-South (CDF-S) survey (Cat. J/ApJS/179/19). Source
identifications are carried out using deep optical-to-radio
multiwavelength catalogs, and are then combined to create lists of
primary and secondary counterparts for the X-ray sources. We
identified reliable counterparts for 442 (95.7%) of the X-ray sources,
with an expected false-match probability of ∼6.2%; we also selected
four additional likely counterparts. The majority of the other 16
X-ray sources appear to be off-nuclear sources, sources associated
with galaxy groups and clusters, high-redshift active galactic nuclei
(AGNs), or spurious X-ray sources. A likelihood-ratio method is used
for source matching, which effectively reduces the false-match
probability at faint magnitudes compared to a simple error-circle
matching method. We construct a master photometric catalog for the
identified X-ray sources including up to 42 bands of UV-to-infrared
data, and then calculate their photometric redshifts (photo-z's). The
typical photo-z accuracy is ∼6%-7%.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 89 7 Summary of the likelihood-ratio matching
parameters and results
table2.dat 77 462 List of the Primary Counterparts
table3.dat 66 77 List of the Secondary Counterparts
table4a.dat 21 60 Median magnitudes
table4.dat 973 462 Photometric Catalog
table5.dat 61 462 Photometric Redshift Catalog
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See also:
II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008)
II/261 : GOODS initial results (Giavalisco+, 2004)
J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)
J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002
J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)
J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy (Szokoly+ 2004)
J/ApJS/155/73 : Photometric redshifts of X-ray sources in CDF-S (Zheng+, 2004)
J/A+A/437/883 : K20 survey: spectroscopic catalogue (Mignoli+, 2005)
J/A+A/449/951 : GOODS-MUSIC sample: multicolour catalog (Grazian+, 2006)
J/A+A/465/1099 : Redshift catalog of 691 objects in CDFS (Ravikumar+, 2007)
J/A+A/478/83 : GOODS-South Field VLT/FORS2 redshifts. III. (Vanzella+, 2008)
J/ApJS/179/114 : VLA 1.4GHz survey of E-CDF-S (Miller+, 2008)
J/ApJS/179/19 : CDFS survey: 2 Ms source catalogs (Luo+, 2008) [LBB2008]
J/ApJS/183/295 : A K-selected catalog of the ECDFS from MUSYC (Taylor+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Cat Catalog identification (1)
9- 14 A6 --- Filt Catalog band for the magnitude
16- 19 F4.1 --- Det The minimum threshold used for source
detection in the catalog (in units of sigma
except for MUSYC: in units of arcsec-2) (2)
21- 24 F4.1 mag Depth Catalog depth in AB magnitude (3)
26- 29 I4 arcmin2 Angle Catalog solid-angle coverage
31- 35 I5 --- Nonir Number of ONIR sources in the ∼2Ms CDF-S region
37- 39 F3.1 arcsec sigmao 1σ positional error of the ONIR sources
41- 44 F4.2 --- Lth Threshold value for the likelihood ratio (4)
46- 49 F4.2 --- R Sample reliability. See Section 2.2 for details.
51- 54 F4.2 --- C Sample completeness. See Section 2.2 for details.
56- 58 I3 --- Nx Total number of X-ray sources that are within
the coverage of the ONIR catalog.
60- 62 I3 --- Nid Number of X-ray sources identified with at least
one ONIR counterpart in this catalog
64- 66 I3 --- Nnoid Number of X-ray sources not identified
68 I1 --- Nmul Number of X-ray sources identified with two ONIR
counterparts in this catalog
70- 73 F4.1 --- Nfalse Expected number of false matches (5)
75 I1 % False False-match probability. (5)
77- 80 F4.1 % Recov Counterpart recovery rate (6)
82- 85 F4.1 % X-O Fraction of ONIR objects that are detected in
the X-ray (7)
87- 89 I3 --- Npri Number of primary counterparts selected from
this catalog (5)
--------------------------------------------------------------------------------
Note (1): Catalog references as follows:
WFI = Giavalisco et al. (2004, Cat. II/261);
GOODS-S = Giavalisco et al. (2004, Cat. II/261);
GEMS = Caldwell et al. (2008ApJS..174..136C 2008ApJS..174..136C);
MUSIC = Grazian et al. (2006, Cat. J/A+A/449/951);
MUSYC = Taylor et al. (2009, Cat. J/ApJS/183/295);
SIMPLE = Damen et al. (2010, ApJ, submitted);
VLA = Miller et al. (2008, Cat. J/ApJS/179/114).
Note (2): Note that in some cases multiple searches have been performed with
different thresholds for deblending purposes.
Note (3): The AB magnitudes for radio sources were converted from the radio flux
densities, m(AB)=-2.5log(Fν)-48.60.
Note (4): to discriminate between spurious and real identifications. The
threshold value is catalog dependent, and generally scales with the
typical values of likelihood ratios (see Equation (1)), which usually
increase when the catalog depth or positional errors decrease.
Note (5): See Section 2.3 for details.
Note (6): Defined as the expected number of true counterparts (Nid-Nfalse)
divided by the number of X-ray sources (Nx).
Note (7): Defined as the expected number of true counterparts (Nid-Nfalse)
divided by the number of ONIR sources in the CDF-S region (Nonir).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [LBB2008] Running source index number (J/ApJS/179/19)
5- 8 F4.2 arcsec sigX 1σ X-ray source positional error
10- 14 I5 --- ONIR ?=0 ONIR (optical/near-IR) ID number
16- 23 F8.5 deg RAdeg ?=0 ONIR Right Ascension (J2000)
25- 33 F9.5 deg DEdeg ?=0 ONIR Declination (J2000)
35- 37 F3.1 arcsec sigO ?=0 1σ ONIR positional error
39- 42 F4.2 arcsec off ?=0 X-ray source/counterpart angular distance
44- 47 F4.2 --- off/s ?=0 Angular distance divided by quadratic sum
of the positional errors
49- 52 F4.2 --- Rc [0/1]? Counterpart reliability parameter
54- 60 A7 --- Cat ? ONIR catalog of primary counterpart
62- 66 F5.2 mag magO ?=0 ONIR magnitude of primary counterpart
68 I1 --- n_ONIR [0/1]? Muliple ONIR counterparts?
(1=true; only for table2)
70- 77 A8 --- Note Remarks (only for table 2)
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Byte-by-byte Description of file: table4a.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Filt Filtre, as labelled in table4
7- 11 F5.2 mag Medmag Median magnitude
14- 17 F4.2 mag NMAD Normalized median absolute deviation (1)
19- 21 I3 --- N Number of X-ray sources used to derive the
median magnitude
--------------------------------------------------------------------------------
Note (1): The NMAD is a robust measure of the spread of the magnitudes (σ)
in a given band, defined as NMAD=1.48xmedian(|m(AB)-median(m(AB))|).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [LBB2008] Running source index number (J/ApJS/179/19) (1)
5 A1 --- l_NUV Upper limit flag on NUV
6- 10 F5.2 mag NUV ?=99 GALEX NUV (177-300nm) AB magnitude
12- 16 F5.2 mag e_NUV ?=99 Error in NUV
18- 19 I2 --- f_NUV [-1/1] Flag on NUV (2)
21 A1 --- l_FUV Limit flag on FUV
22- 26 F5.2 mag FUV ?=99 GALEX FUV (120-177nm) AB magnitude
28- 32 F5.2 mag e_FUV ?=99 Error in FUV
34- 35 I2 --- f_FUV [-1/1] Flag on FUV (2)
37 A1 --- l_Umag Limit flag on Umag
38- 42 F5.2 mag Umag ?=99 VIMOS U band AB magnitude
44- 48 F5.2 mag e_Umag ?=99 Error in Umag
50- 52 I3 --- f_Umag [-1/1] Flag on Umag (2)
54- 58 F5.2 mag 428mag ?=99 COMBO-17 428nm narrow band AB magnitude
60- 64 F5.2 mag e_428mag ?=99 Error in 428mag
66- 68 I3 --- f_428mag [-1/1] Flag on 428mag (2)
70- 74 F5.2 mag 462mag ?=99 COMBO-17 462nm narrow band AB magnitude
76- 80 F5.2 mag e_462mag ?=99 Error in 462mag
82- 84 I3 --- f_462mag [-1/1] Flag on 462mag (2)
86- 90 F5.2 mag 486mag ?=99 COMBO-17 486nm narrow band AB magnitude
92- 96 F5.2 mag e_486mag ?=99 Error in 486mag
98-100 I3 --- f_486mag [-1/1] Flag on 486mag (2)
102-106 F5.2 mag 519mag ?=99 COMBO-17 519nm narrow band AB magnitude
108-112 F5.2 mag e_519mag ?=99 Error in 519mag
114-116 I3 --- f_519mag [-1/1] Flag on 519mag (2)
118-122 F5.2 mag 572mag ?=99 COMBO-17 572nm narrow band AB magnitude
124-128 F5.2 mag e_572mag ?=99 Error in 572mag
130-132 I3 --- f_572mag [-1/1] Flag on 572mag (2)
134-138 F5.2 mag 605mag ?=99 COMBO-17 605nm narrow band AB magnitude
140-144 F5.2 mag e_605mag ?=99 Error in 605mag
146-148 I3 --- f_605mag [-1/1] Flag on 605mag (2)
150-154 F5.2 mag 645mag ?=99 COMBO-17 645nm narrow band AB magnitude
156-160 F5.2 mag e_645mag ?=99 Error in 645mag
162-164 I3 --- f_645mag [-1/1] Flag on 645mag (2)
166-170 F5.2 mag 696mag ?=99 COMBO-17 696nm narrow band AB magnitude
172-176 F5.2 mag e_696mag ?=99 Error in 696mag
178-180 I3 --- f_696mag [-1/1] Flag on 696mag (2)
182-186 F5.2 mag 753mag ?=99 COMBO-17 753nm narrow band AB magnitude
188-192 F5.2 mag e_753mag ?=99 Error in 753mag
194-196 I3 --- f_753mag [-1/1] Flag on 753mag (2)
198-202 F5.2 mag 816mag ?=99 COMBO-17 816nm narrow band AB magnitude
204-208 F5.2 mag e_816mag ?=99 Error in 816mag
210-212 I3 --- f_816mag [-1/1] Flag on 816mag (2)
214-218 F5.2 mag 857mag ?=99 COMBO-17 857nm narrow band AB magnitude
220-224 F5.2 mag e_857mag ?=99 Error in 857mag
226-228 I3 --- f_857mag [-1/1] Flag on 857mag (2)
230-234 F5.2 mag 914mag ?=99 COMBO-17 914nm narrow band AB magnitude
236-240 F5.2 mag e_914mag ?=99 Error in 914mag
242-244 I3 --- f_914mag [-1/1] Flag on 914mag (2)
246-250 F5.2 mag UCmag ?=99 COMBO-17 U-band AB magnitude
252-256 F5.2 mag e_UCmag ?=99 Error in UCmag
258-260 I3 --- f_UCmag [-1/1] Flag on UCmag (2)
262-266 F5.2 mag BCmag ?=99 COMBO-17 B-band AB magnitude
268-272 F5.2 mag e_BCmag ?=99 Error in BCmag
274-276 I3 --- f_BCmag [-1/1] Flag on BCmag (2)
278-282 F5.2 mag VCmag ?=99 COMBO-17 V-band AB magnitude
284-288 F5.2 mag e_VCmag ?=99 Error in VCmag
290-292 I3 --- f_VCmag [-1/1] Flag on VCmag (2)
294-298 F5.2 mag RCmag ?=99 COMBO-17 R-band AB magnitude
300-304 F5.2 mag e_RCmag ?=99 Error in RCmag
306-308 I3 --- f_RCmag [-1/1] Flag on RCmag (2)
310-314 F5.2 mag ICmag ?=99 COMBO-17 I-band AB magnitude
316-320 F5.2 mag e_ICmag ?=99 Error in ICmag
322-324 I3 --- f_ICmag [-1/1] Flag on ICmag (2)
326-330 F5.2 mag UM1mag ?=99 MUSYC BVR-detected U-band AB magnitude
332-336 F5.2 mag e_UM1mag ?=99 Error in UM1mag
338-340 I3 --- f_UM1mag [-1/1] Flag on UM1mag (2)
342-346 F5.2 mag BM1mag ?=99 MUSYC BVR-detected B-band AB magnitude
348-352 F5.2 mag e_BM1mag ?=99 Error in BM1mag
354-356 I3 --- f_BM1mag [-1/1] Flag on BM1mag (2)
358-362 F5.2 mag VM1mag ?=99 MUSYC BVR-detected V-band AB magnitude
364-368 F5.2 mag e_VM1mag ?=99 Error in VM1mag
370-372 I3 --- f_VM1mag [-1/1] Flag on VM1mag (2)
374-378 F5.2 mag RM1mag ?=99 MUSYC BVR-detected R-band AB magnitude
380-384 F5.2 mag e_RM1mag ?=99 Error in RM1mag
386-388 I3 --- f_RM1mag [-1/1] Flag on RM1mag (2)
390-394 F5.2 mag IM1mag ?=99 MUSYC BVR-detected I-band AB magnitude
396-400 F5.2 mag e_IM1mag ?=99 Error in IM1mag
402-404 I3 --- f_IM1mag [-1/1] Flag on IM1mag (2)
406-410 F5.2 mag zM1mag ?=99 MUSYC BVR-detected z-band AB magnitude
412-416 F5.2 mag e_zM1mag ?=99 Error in zM1mag
418-420 I3 --- f_zM1mag [-1/1] Flag on zM1mag (2)
422-426 F5.2 mag o3M1mag ?=99 MUSYC BVR-detected o3 (501nm) AB magnitude
428-432 F5.2 mag e_o3M1mag ?=99 Error in o3M1mag
434-436 I3 --- f_o3M1mag [-1/1] Flag on o3M1mag (2)
438 A1 --- l_BM2mag Limit flag on BM2mag
439-443 F5.2 mag BM2mag ?=99 MUSYC K-detected B-band AB magnitude
445-449 F5.2 mag e_BM2mag ?=99 Error in BM2mag
451-453 I3 --- f_BM2mag [-1/1] Flag on BM2mag (2)
455 A1 --- l_VM2mag Limit flag on VM2mag
456-460 F5.2 mag VM2mag ?=99 MUSYC K-detected V-band AB magnitude
462-466 F5.2 mag e_VM2mag ?=99 Error in VM2mag
468-470 I3 --- f_VM2mag [-1/1] Flag on VM2mag (2)
472-476 F5.2 mag RM2mag ?=99 MUSYC K-detected R-band AB magnitude
478-482 F5.2 mag e_RM2mag ?=99 Error in RM2mag
484-486 I3 --- f_RM2mag [-1/1] Flag on RM2mag (2)
488 A1 --- l_IM2mag Limit flag on IM2mag
489-493 F5.2 mag IM2mag ?=99 MUSYC K-detected I-band AB magnitude
495-499 F5.2 mag e_IM2mag ?=99 Error in IM2mag
501-503 I3 --- f_IM2mag [-1/1] Flag on IM2mag (2)
505-509 F5.2 mag zM2mag ?=99 MUSYC K-detected z-band AB magnitude
511-515 F5.2 mag e_zM2mag ?=99 Error in zM2mag
517-519 I3 --- f_zM2mag [-1/1] Flag on zM2mag (2)
521 A1 --- l_JM2mag Limit flag on JM2mag
522-526 F5.2 mag JM2mag ?=99 MUSYC K-detected J-band AB magnitude
528-532 F5.2 mag e_JM2mag ?=99 Error in JM2mag
534-536 I3 --- f_JM2mag [-1/1] Flag on JM2mag (2)
538 A1 --- l_KM2mag Limit flag on KM2mag
539-543 F5.2 mag KM2mag ?=99 MUSYC K-detected K-band AB magnitude
545-549 F5.2 mag e_KM2mag ?=99 Error in KM2mag
551-553 I3 --- f_KM2mag [-1/1] Flag on KM2mag (2)
555-559 F5.2 mag U35GMmag ?=99 GOODS-S MUSIC U35 AB magnitude
561-565 F5.2 mag e_U35GMmag ?=99 Error in U35GMmag
567-569 I3 --- f_U35GMmag [-1/1] Flag on U35GMmag (2)
571-575 F5.2 mag U38GMmag ?=99 GOODS-S MUSIC U38 AB magnitude
577-581 F5.2 mag e_U38GMmag ?=99 Error in U38GMmag
583-585 I3 --- f_U38GMmag [-1/1] Flag on U38GMmag (2)
587-591 F5.2 mag UGMmag ?=99 GOODS-S MUSIC U-band AB magnitude
593-597 F5.2 mag e_UGMmag ?=99 Error in UGMmag
599-601 I3 --- f_UGMmag [-1/1] Flag on UGMmag (2)
603-607 F5.2 mag BGMmag ?=99 GOODS-S MUSIC F435W AB magnitude
609-613 F5.2 mag e_BGMmag ?=99 Error in BGMmag
615-617 I3 --- f_BGMmag [-1/1] Flag on BGMmag (2)
619-623 F5.2 mag VGMmag ?=99 GOODS-S MUSIC F606W AB magnitude
625-629 F5.2 mag e_VGMmag ?=99 Error in VGMmag
631-633 I3 --- f_VGMmag [-1/1] Flag on VGMmag (2)
635-639 F5.2 mag iGMmag ?=99 GOODS-S MUSIC F775W AB magnitude
641-645 F5.2 mag e_iGMmag ?=99 Error in iGMmag
647-649 I3 --- f_iGMmag [-1/1] Flag on iGMmag (2)
651-655 F5.2 mag zGMmag ?=99 GOODS-S MUSIC F850LP AB magnitude
657-661 F5.2 mag e_zGMmag ?=99 Error in zGMmag
663-665 I3 --- f_zGMmag [-1/1] Flag on zGMmag (2)
667-671 F5.2 mag JGMmag ?=99 GOODS-S MUSIC J AB magnitude
673-677 F5.2 mag e_JGMmag ?=99 Error in JGMmag
679-681 I3 --- f_JGMmag [-1/1] Flag on JGMmag (2)
683-687 F5.2 mag HGMmag ?=99 GOODS-S MUSIC H AB magnitude
689-693 F5.2 mag e_HGMmag ?=99 Error in HGMmag
695-697 I3 --- f_HGMmag [-1/1] Flag on HGMmag (2)
699-703 F5.2 mag KGMmag ?=99 GOODS-S MUSIC K AB magnitude
705-709 F5.2 mag e_KGMmag ?=99 Error in KGMmag
711-713 I3 --- f_KGMmag [-1/1] Flag on KGMmag (2)
715-719 F5.2 mag 3.6GMmag ?=99 GOODS-S MUSIC 3.6um AB magnitude
721-725 F5.2 mag e_3.6GMmag ?=99 Error in 3.6GMmag
727-729 I3 --- f_3.6GMmag [-1/1] Flag on 3.6GMmag (2)
731-735 F5.2 mag 4.5GMmag ?=99 GOODS-S MUSIC 4.5um AB magnitude
737-741 F5.2 mag e_4.5GMmag ?=99 Error in 4.5GMmag
743-745 I3 --- f_4.5GMmag [-1/1] Flag on 4.5GMmag (2)
747-751 F5.2 mag 5.8GMmag ?=99 GOODS-S MUSIC 5.8um AB magnitude
753-757 F5.2 mag e_5.8GMmag ?=99 Error in 5.8GMmag
759-761 I3 --- f_5.8GMmag [-1/1] Flag on 5.8GMmag (2)
763-767 F5.2 mag 8.0GMmag ?=99 GOODS-S MUSIC 8.0um AB magnitude
769-773 F5.2 mag e_8.0GMmag ?=99 Error in 8.0GMmag
775-777 I3 --- f_8.0GMmag [-1/1] Flag on 8.0GMmag (2)
779 A1 --- l_RWmag Limit flag on RWmag
780-784 F5.2 mag RWmag ?=99 WFI catalog R-band AB magnitude
786-790 F5.2 mag e_RWmag ?=99 Error in RWmag
792-794 I3 --- f_RWmag [-1/1] Flag on RWmag (2)
796-800 F5.2 mag BGmag ?=99 GOODS-S catalog F435W AB magnitude
802-806 F5.2 mag e_BGmag ?=99 Error in BGmag
808-810 I3 --- f_BGmag [-1/1] Flag on BGmag (2)
812-816 F5.2 mag VGSmag ?=99 GOODS-S catalog F606W AB magnitude
818-822 F5.2 mag e_VGSmag ?=99 Error in VGSmag
824-826 I3 --- f_VGSmag [-1/1] Flag on VGSmag (2)
828-832 F5.2 mag iGSmag ?=99 GOODS-S catalog F775W AB magnitude
834-838 F5.2 mag e_iGSmag ?=99 Error in iGSmag
840-842 I3 --- f_iGSmag [-1/1] Flag on iGSmag (2)
844 A1 --- l_zGSmag Limit flag on zGSmag
845-849 F5.2 mag zGSmag ?=99 GOODS-S catalog F850LP AB magnitude
851-855 F5.2 mag e_zGSmag ?=99 Error in zGSmag
857-859 I3 --- f_zGSmag [-1/1] Flag on zGSmag (2)
861-865 F5.2 mag VGmag ?=99 GEMS catalog F606W AB magnitude
867-871 F5.2 mag e_VGmag ?=99 Error in VGmag
873-875 I3 --- f_VGmag [-1/1] Flag on VGmag (2)
877 A1 --- l_zGmag Limit flag on zGmag
878-882 F5.2 mag zGmag ?=99 GEMS catalog F850LP AB magnitude
884-888 F5.2 mag e_zGmag ?=99 Error in zGmag
890-892 I3 --- f_zGmag [-1/1] Flag on zGmag (2)
894-898 F5.2 mag 3.6S ?=99 SIMPLE catalog 3.6um AB magnitude
900-904 F5.2 mag e_3.6S ?=99 Error in 3.6S
906-908 I3 --- f_3.6S [-1/1] Flag on 3.6S (2)
910-914 F5.2 mag 4.5S ?=99 SIMPLE catalog 4.5um AB magnitude
916-920 F5.2 mag e_4.5S ?=99 Error in 4.5S
922-924 I3 --- f_4.5S [-1/1] Flag on 4.5S (2)
926 A1 --- l_5.8S Limit flag on 5.8S
927-931 F5.2 mag 5.8S ?=99 SIMPLE catalog 5.8um AB magnitude
933-937 F5.2 mag e_5.8S ?=99 Error in 5.8S
939-941 I3 --- f_5.8S [-1/1] Flag on 5.8S (2)
943 A1 --- l_8.0S Limit flag on 8.0S
944-948 F5.2 mag 8.0S ?=99 SIMPLE catalog 8.0um AB magnitude
950-954 F5.2 mag e_8.0S ?=99 Error in 8.0S
956-958 I3 --- f_8.0S [-1/1] Flag on 8.0S (2)
960-964 F5.2 mag VLA ?=99 VLA 1.4GHz magnitude in AB system
966-970 F5.2 mag e_VLA ?=99 Error in VLA
972-973 I2 --- f_VLA [-1/1] Flag on VLA (2)
--------------------------------------------------------------------------------
Note (1): The radio data are used only in the X-ray source identification
process, and are not used in the photometric redshift calculation.
All photometric data are given in AB magnitudes.
For the first line, value in parenthesis:
Note (2): the flag has the values:
1 = the data point was used in the photometric redshift calculation,
0 = the data point was not used or not available,
-1 = the data point is probably problematic, either being blended or
disagreeing with other data.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [LBB2008] Running source index number (J/ApJS/179/19)
5- 10 F6.3 --- zs ?=-1 Spectroscopic redshift
12- 17 F6.3 --- zp ?=-1 ZEBRA derived photometric redshift (3)
19- 24 F6.3 --- zLow ?=-1 Lower 1σ redshift confidence interval
26- 31 F6.3 --- zUp ?=-1 Upper 1σ redshift confidence interval
33- 34 I2 --- NDet Number of filters source is detected
36- 37 I2 --- NFilt Number of filters used in the zp calculation
39- 43 F5.2 --- chi2 Reduced χ2 of best-fit result
45- 50 F6.3 --- Azp ?=-1 Alternative photometric redshift
52- 56 F5.2 --- Achi2 ?=-1 Reduced χ2 for alternative zp
58 I1 --- ODet [0/1] X-ray source detected in optical? (4)
60- 61 I2 --- r_zs ?=-1 zs reference code (5)
--------------------------------------------------------------------------------
Note (3): Set to "0" for the six stars and "-1" for the 16 sources without
identifications.
Note (4): A value of "0" means no optical detection, in which case the zp
was calculated using only the IR/NIR data and the optical upper-limit
information (and is probably not very reliable). There are 20 sources
in the photometric sample that do not have optical detections.
Note (5): References as follows:
1 = Le Fevre et al. (2004, Cat. J/A+A/428/1043)
2 = Szokoly et al. (2004, Cat. J/ApJS/155/271)
3 = Zheng et al. (2004, Cat. J/ApJS/155/73)
4 = Mignoli et al. (2005, Cat. J/A+A/437/883)
5 = Ravikumar et al. (2007, Cat. J/A+A/465/1099)
6 = Vanzella et al. (2008, Cat. J/A+A/478/83)
7 = Popesso et al. (2009A&A...494..443P 2009A&A...494..443P)
8 = Silverman et al. (2010, in prep)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-May-2010