J/ApJ/513/34 HDF photometric redshifts catalog (Fernandez-Soto+, 1999)
A new catalog of photometric redshifts in the Hubble Deep Field.
Fernandez-Soto A., Lanzetta K.M., Yahil A.
<Astrophys. J. 513, 34 (1999)>
=1999ApJ...513...34F 1999ApJ...513...34F
ADC_Keywords: Galaxies, photometry ; Photometry, UBVRIJKLMNH ; Redshifts
Mission_Name: HST
Keywords: cosmology: observations - galaxies: distance and redshifts -
galaxies: photometry - galaxies: statistics
Abstract:
Using the newly available infrared images of the Hubble Deep Field in
the J, H, and K bands and an optimal photometric method, we have
refined a technique to estimate the redshifts of 1067 galaxies. A
detailed comparison of our results with the spectroscopic redshifts in
those cases where the latter are available shows that this technique
gives very good results for bright enough objects [AB(814nm)<26.0].
From a study of the distribution of residuals [Δzrms/(1+z)∼0.1
at all redshifts], we conclude that the observed errors are mainly due
to cosmic variance. This very important result allows for the
assessment of errors in quantities to be directly or indirectly
measured from the catalog. We present some of the statistical
properties of the ensemble of galaxies in the catalog, and we finish
by presenting a list of bright high-redshift (z∼5) candidates
extracted from our catalog together with recent spectroscopic redshift
determinations confirming that two of them are at z=5.34 and z=5.60.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 79 1067 *Coordinates, best AB(814nm) magnitudes, redshifts,
and best-fit spectral types for every galaxy in
the catalog
table5.dat 99 1067 UBVIJHK fluxes and errors
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Note on table4.dat : ABlambda=-2.5logfnu(nJy) + 31.40
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See also:
J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996)
J/A+AS/129/583 : Hubble Deep Field surface photometry (Fasano+ 1998)
J/AJ/112/359 : Galaxies of the Hubble Deep Field (van den Bergh+ 1996)
J/AJ/116/2081 : Hubble Deep Field catalog of color-based redshift (Wang+ 1998)
J/AJ/117/17 : Hubble Deep Field near-IR obs. (Thompson+, 1999)
J/ApJ/453/48 : VI photometry of HST faint field galaxies (Driver+ 1995)
J/ApJ/471/L5 : Redshift clustering in the Hubble Deep Field (Cohen+ 1996)
J/ApJ/507/585 : Hubble Deep Field galaxy morphology (Marleau+, 1998)
Table 3: Stars in the Hubble Deep Field
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Star Position AB(814nm) References
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1 1877 349 23.52 1, 2
2 3380 404 22.68 1, 2
3 1306 420 24.64 1, 2, 4
4 869 988 19.22 1, 4
5 247 1117 22.50 1, 2, 3, 4
6 2904 1130 21.08 1, 4
7 1194 1254 22.71 1, 2, 3, 4
8 2449 1574 22.40 1, 2, 3, 4
9 2070 1756 20.89 1
10 1026 1802 21.23 1, 2, 3, 4
11 3425 1920 24.14 1, 2, 3, 4
12 2441 1936 24.34 1, 2, 3, 4
13 654 2180 19.26 1, 4
14 1645 2496 27.61 3
15 535 2775 26.76 1, 2, 3
16 956 2845 25.42 1, 2, 3
17 1095 3203 26.38 1, 2
18 315 3788 20.84 1, 3
19 1389 3819 25.50 3
20 1361 3974 19.90
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Notes: The coordinates refer to (x,y) positions in the Mosaic images
[FLY99] Star NN in Simbad
Reference numbers:
1: Flynn et al., 1996ApJ...466L..55F 1996ApJ...466L..55F
2: Elson et al., 1996NewA....1....1E 1996NewA....1....1E
3: Mendez et al., 1996MNRAS.283..666M 1996MNRAS.283..666M
4: L. L. Cowie at http://www.ifa.hawaii.edu/~cowie/tts/tts.html
The last entry is an obvious star not present in any of the
references, perhaps because it lies too close to the upper border
of the image.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [FLY99] Identification number
6- 11 F6.1 pix Xpos X position on the mosaic image
13- 18 F6.1 pix Ypos Y position on the mosaic image
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 31 F6.3 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 44 F5.2 arcsec DEs Declination (J2000)
46- 59 A14 --- [WBD96] Williams et al., 1996 (Cat. J/AJ/112/1335)
identification
61- 65 F5.2 mag ABmag AB(814nm) best magnitude
67- 71 F5.3 --- zsp ? Spectoscopic redshift (if available)
73- 77 F5.3 --- zph Photometric redshift (1)
79 I1 --- Type [1/4] Best fit type (1=Ell, 2=Sbc, 3=Scd, 4=Irr)
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Note (1): Object 3: z(ph)=5.28 when combined with the object by its side
(called HDF3-951.2 in Williams et al., 1996, Cat. J/AJ/112/1335,
which is too faint to enter our catalog (AB(814nm)=26.5).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [FLY99] Identification number (1)
6- 13 F8.2 nJy SU300 U band flux (2)
15- 19 F5.2 nJy e_SU300 rms uncertainty on SU
21- 28 F8.2 nJy SB450 B band flux (2)
30- 34 F5.2 nJy e_SB450 rms uncertainty on SB
36- 44 F9.2 nJy SV606 V band flux (2)
46- 50 F5.2 nJy e_SV606 rms uncertainty on SV
52- 60 F9.2 nJy SI814 I band flux (2)
62- 66 F5.2 nJy e_SI814 rms uncertainty on SI
68- 73 I6 nJy SJ J band flux (2)
75- 77 I3 nJy e_SJ ? rms uncertainty on SJ
79- 84 I6 nJy SH H band flux (2)
86- 88 I3 nJy e_SH ? rms uncertainty on SH
90- 95 I6 nJy SK K band flux (2)
97- 99 I3 nJy e_SK ? rms uncertainty on SK
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Note (1): When combined with the object by its side (called HDF3-951.2
in Williams et al., 1996, Cat. J/AJ/112/1335), which is too faint
to enter our catalog (AB(814nm)=26.5), fluxes and errors are as
follows:
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U B V I J H K
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3(bis) -13.58 -4.77 18.10 229.10 186 806 377
(10.67) (5.42) (3.63) (5.69) (409) (874) (706)
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Note (2): AB(wavelength)=-2.5 log [flux(nJy)]+31.40
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Table 6: Data corresponding to the brightest high-redshift candidates
in our catalog
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Name [FLY99] Xpos Ypos RA (J2000) DE zphot AB(814nm)
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A 3 542.8 229.2 12 36 59.797 +62 12 18.67 5.72b 25.69
B 311 2342.2 968.4 12 36 48.714 +62 12 16.72 5.64 26.32
C 328 2393.8 1006.4 12 36 48.357 +62 12 17.28 4.76 26.19
D 868 407.6 2752.9 12 36 54.714 +62 13 52.85 4.72 25.97
E 173 3259.2 652.1 12 36 44.658 +62 11 50.45 4.58c 25.04
F 479 887.0 1392.1 12 36 55.334 +62 12 55.54 4.56 25.24
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Notes: b: Or zphot=5.28, see text for explanation. zspec=5.35
c: Tentative spectroscopic redshift (see text), zphot=4.52
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History: Copied at http://bat.phys.unsw.edu.au/~fsoto/hdf/
(End) James Marcout, Patricia Bauer [CDS] 26-Apr-1999