J/AJ/125/1107 Ultra-deep near-IR observation in HDF-S (Labbe+, 2003)
Ultradeep near-infrared ISAAC observations of the Hubble Deep Field South:
observations, reduction, multicolor catalog, and photometric redshifts.
Labbe I., Franx M., Rudnick G., Foerster-Schreiber N.M., Rix H.-W.,
Moorwood A., Van Dokkum P.G., Van Der Werf P., Rottgering H.,
Van Starkenburg L., Van De Wel A., Kuijken K., Daddi E.
<Astron. J., 125, 1107-1123 (2003)>
=2003AJ....125.1107L 2003AJ....125.1107L
ADC_Keywords: Galaxy catalogs ; Galaxies, photometry ; Redshifts
Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: photometry
Abstract:
We present deep near-infrared (NIR) Js-, H-, and Ks-band ISAAC imaging
of the Wide Field Planetary Camera 2 (WFPC2) field of the Hubble Deep
Field South (HDF-S). The 2.5'x2.5' high Galactic latitude field was
observed with the Very Large Telescope under the best seeing
conditions, with integration times amounting to 33.6hr in Js, 32.3hr
in H, and 35.6hr in Ks. We reach total AB magnitudes for point sources
of 26.8, 26.2, and 26.2, respectively (3sigma), which make it the
deepest ground-based NIR observation to date and the deepest Ks-band
data in any field. The effective seeing of the co-added images is
∼0.45" in Js, ∼0.48" in H, and ∼0.46" in Ks. Using published WFPC2
optical data, we constructed a Ks-limited multicolor catalog
containing 833 sources down to Ktots,AB≲26, of which 624 have
seven-band optical-to-NIR photometry. These data allow us to select
normal galaxies from their rest-frame optical properties to high
redshift (z≲4). The observations, data reduction, and properties of
the final images are discussed, and we address the detection and
photometry procedures that were used in making the catalog. In
addition, we present deep number counts, color distributions, and
photometric redshifts of the HDF-S galaxies.
Description:
The high Galactic latitude field of the HDF-S is a natural choice for
follow-up in the NIR given the existing ultradeep WFPC2 data in four
optical filters. Our NIR imaging consists of a single ISAAC pointing
centered on the WFPC2 main field of the HDF-S (RA 22:32:55.464,
DE=-60:33:05.01 [J2000.0]) in the Js, H, and Ks filters, which gives
good sampling of rest-frame optical wavelengths over the redshift
range 1<z<4.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
position.dat 45 833 Positions of the objects
photflux.dat 586 833 *Photometric flux catalog, V3.0 (18/01/03)
aperture.dat 2478 833 *Aperture photometry, V3.0 (12/12/2002)
redshift.dat 36 833 Photometric and spectroscopic redshifts V1.0
lum.dat 98 833 Rest-frame luminosities in Bessell UBV filters
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Note on photflux.dat, aperture.dat files: the WFPC2 filters that are used
are F300W, F450W, F606W, and F814W, which we will call U300, B450,
V606, and I814.
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See also:
J/A+AS/145/111 : HDF-South catalogue of galaxies (Volonteri+, 2000)
J/AJ/119/486 : HDF-S: STIS imaging (Gardner+, 2000)
J/AJ/120/2206 : NTT, HDF-S and HDF-N photometric redshifts (Fontana+, 2000)
J/AJ/120/2747 : HDF-South WFPC2 observations (Casertano+, 2000)
J/ApJ/538/493 : HDF-South NICMOS field (Yahata+, 2000)
J/A+A/375/1 : IR observations of Chandra Deep Field + HDFS (Saracco+, 2001)
J/AJ/122/2205 : HDF-South K photometric redshift catalog (Rudnick+, 2001)
J/A+A/382/513 : Galaxy warps in the HDF North and South (Reshetnikov+, 2002)
J/AJ/126/1208 : UVBI magnitudes and redshifts in HDF-South (Sawicki+, 2003)
J/MNRAS/355/82 : Morphological analysis of HDF-N and HDF-S (Trujillo+, 2004)
J/A+A/440/61 : FORS spectroscopy of HDFS galaxies (Rigopoulou+, 2005)
J/AJ/130/1358 : Radio observations of the HDFS region. I (Norris+, 2005)
J/A+A/452/119 : EIS: infrared observations of CDF-S and HDF-S (Olsen+, 2006)
J/AJ/131/2383 : Photometry and spectroscopy in the HDF-S (Glazebrook+, 2006)
J/ApJ/655/51 : HDFS IRAC observations of 2<z<3.5 galaxies (Wuyts+, 2007)
Byte-by-byte Description of file: position.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- --- [HDFS FIRES]
12- 16 I5 --- [LFR2003] Sequential number
19- 20 I2 h RAh Right ascension (J2000), from NED
22- 23 I2 min RAm Right ascension (J2000), from NED
25- 28 F4.1 s RAs Right ascension (J2000), from NED
30 A1 --- DE- Declination sign (J2000), from NED
31- 32 I2 deg DEd Declination (J2000), from NED
34- 35 I2 arcmin DEm Declination (J2000), from NED
37- 38 I2 arcsec DEs Declination (J2000), from NED
41- 45 A5 --- Type [G Pair Trpl * ] NED type of object
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Byte-by-byte Description of file: photflux.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 pix Xpos X position in WFPC2 pixel (0.0398"/pix)
9- 15 F7.2 pix Ypos Y position in WFPC2 pixel (0.0398"/pix)
17- 21 I5 --- [LFR2003] Object identification number
24- 29 F6.3 mag Uap1 ?=- U magAB in 0.7" diameter circular aperture
31- 36 F6.3 mag e_Uap1 ?=- rms of Uap1
38- 43 F6.3 mag Bap1 ?=- B magAB in 0.7" diameter circular aperture
45- 50 F6.3 mag e_Bap1 ?=- rms of Bap1
52- 57 F6.3 mag Vap1 ?=- V magAB in 0.7" diameter circular aperture
59- 64 F6.3 mag e_Vap1 ?=- rms of Vap1
66- 71 F6.3 mag Iap1 ?=- I magAB in 0.7" diameter circular aperture
73- 78 F6.3 mag e_Iap1 ?=- rms of Iap1
80- 85 F6.3 mag Jap1 ?=- J magAB in 0.7" diameter circular aperture
87- 92 F6.3 mag e_Jap1 ?=- rms of Jap1
94- 99 F6.3 mag Hap1 ?=- H magAB in 0.7" diameter circular aperture
101-106 F6.3 mag e_Hap1 ?=- rms of Hap1
108-113 F6.3 mag Kap1 ?=- K magAB in 0.7" diameter circular aperture
115-120 F6.3 mag e_Kap1 ?=- rms of Kap1
123-128 F6.3 mag Uap2 ?=- U magAB in 2.0" diameter circular aperture
130-135 F6.3 mag e_Uap2 ?=- rms of Uap2
137-142 F6.3 mag Bap2 ?=- B magAB in 2.0" diameter circular aperture
144-149 F6.3 mag e_Bap2 ?=- rms of Bap2
151-156 F6.3 mag Vap2 ?=- V magAB in 2.0" diameter circular aperture
158-163 F6.3 mag e_Vap2 ?=- rms of Vap2
165-170 F6.3 mag Iap2 ?=- I magAB in 2.0" diameter circular aperture
172-177 F6.3 mag e_Iap2 ?=- rms of Iap2
179-184 F6.3 mag Jap2 ?=- J magAB in 2.0" diameter circular aperture
186-191 F6.3 mag e_Jap2 ?=- rms of Jap2
193-198 F6.3 mag Hap2 ?=- H magAB in 2.0" diameter circular aperture
200-205 F6.3 mag e_Hap2 ?=- rms of Hap2
207-212 F6.3 mag Kap2 ?=- K magAB in 2.0" diameter circular aperture
214-219 F6.3 mag e_Kap2 ?=- rms of Kap2
222-227 F6.3 mag Uiso ?=- U mag(AB) in K-detection isophote (1)
229-234 F6.3 mag e_Uiso ?=- rms of Uiso
236-241 F6.3 mag Biso ?=- B mag(AB) in K-detection isophote (1)
243-248 F6.3 mag e_Biso ?=- rms of Biso
250-255 F6.3 mag Viso ?=- V mag(AB) in K-detection isophote (1)
257-262 F6.3 mag e_Viso ?=- rms of Viso
264-269 F6.3 mag Iiso ?=- I mag(AB) in K-detection isophote (1)
271-276 F6.3 mag e_Iiso ?=- rms of Iiso
278-283 F6.3 mag Jiso ?=- J mag(AB) in K-detection isophote (1)
285-290 F6.3 mag e_Jiso ?=- rms of Jiso
292-297 F6.3 mag Hiso ?=- H mag(AB) in K-detection isophote (1)
299-304 F6.3 mag e_Hiso ?=- rms of Hiso
306-311 F6.3 mag Kiso ?=- K mag(AB) in K-detection isophote (1)
313-318 F6.3 mag e_Kiso ?=- rms of Kiso
321-326 F6.3 mag Ucol ?=- U magAB in custom 'optimal_color' aperture
328-333 F6.3 mag e_Ucol ?=- rms of Ucol
335-340 F6.3 mag Bcol ?=- B magAB in custom 'optimal_color' aperture
342-347 F6.3 mag e_Bcol ?=- rms of Bcol
349-354 F6.3 mag Vcol ?=- V magAB in custom 'optimal_color' aperture
356-361 F6.3 mag e_Vcol ?=- rms of Vcol
363-368 F6.3 mag Icol ?=- I magAB in custom 'optimal_color' aperture
370-375 F6.3 mag e_Icol ?=- rms of Icol
377-382 F6.3 mag Jcol ?=- J magAB in custom 'optimal_color' aperture
384-389 F6.3 mag e_Jcol ?=- rms of Jcol
391-396 F6.3 mag Hcol ?=- H magAB in custom 'optimal_color' aperture
398-403 F6.3 mag e_Hcol ?=- rms of Hcol
405-410 F6.3 mag Kcol ?=- K mag in custom 'optimal_color' aperture
412-417 F6.3 mag e_Kcol ?=- rms of Kcol
420-425 F6.3 mag Ktot ?=- K mag(AB) in 'total' aperture
(aperture corrected AUTO)
427-432 F6.3 mag e_Ktot ?=- rms of Ktot
434 I1 --- apcol Integer code indicating aperture used for
color measurement
436 I1 --- aptot Integer code indicating aperture used for
color measurement
438-442 F5.3 --- totcor Applied aperture correction to Ktot and Ke_tot
444-448 I5 pix Aiso Area within K-detection isophote
450-456 F7.1 pix Aauto Area within AUTO, Kron-like automatic
scaling aperture
458-462 F5.2 pix rcol Radius = sqrt(npix/PI) of 'col' aperture
464-468 F5.2 pix rtot Radius = sqrt(npix/PI) of 'tot' aperture
470-474 F5.2 pix Kfwhm Gaussian FWHM in K-band
476-480 F5.3 --- Kcl SExtractor stellar classification index in
K-band (1=stellar, 0=extended)
482-486 F5.2 --- Ifwhm Gaussian FWHM of brightest I-band source in
K-isophote
488 I1 --- In Number of I-band sources in K-isophote
490-496 F7.2 --- Ix X position in WFPC2 pixels of brightest
I-band source
498-504 F7.2 --- Iy Y position in WFPC2 pixels of brightest
I-band source
506-510 F5.3 --- wU Average weight (var) in U-band in 0.7"
diameter aperture
512-516 F5.3 --- wB Average weight (var) in B-band in 0.7"
diameter aperture
518-522 F5.3 --- wV Average weight (var) in V-band in 0.7"
diameter aperture
524-528 F5.3 --- wI Average weight (var) in I-band in 0.7"
diameter aperture
530-534 F5.3 --- wJ Average weight (var) in J-band in 0.7"
diameter aperture
536-540 F5.3 --- wH Average weight (var) in H-band in 0.7"
diameter aperture
542-546 F5.3 --- wK Average weight (var) in K-band in 0.7"
diameter aperture
548-552 F5.3 --- wmin Minimum weight in w[U-K]
554 I1 --- bl [0/1] Source overlapping with other source
556 I1 --- bs [0/1] Bias problem
558-564 F7.2 pix x3 x position in ISAAC pixels (0.119"/pix):
xisaac = xwfpc2/3. + 100.
566-572 F7.2 pix y3 y position in ISAAC pixels (0.119"/pix):
xisaac = xwfpc2/3. + 100.
574-578 I5 --- nnID Object identification number of nearest
neighbour
580-584 F5.2 pix nnD3 Distance in ISAAC pixels to nearest neighbour
586 I1 --- St [0/1] If (star≡1) then sed best fit with
stellar template
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Note (1): Isophote corresponds to ∼26.2 magAB/arcsec2
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Byte-by-byte Description of file: aperture.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 pix X3 X position (1)
9- 15 F7.2 pix Y3 Y position (1)
17- 21 I5 --- [LFR2003] Sequential number
23- 197 25F7.3 mag UFlux ?=- U-band flux in 25 apertures (2)
198- 372 25F7.3 mag e_UFlux ?=- Mean error on 25 U-band fluxes (2)
374- 548 25F7.3 mag BFlux ?=- B-band flux in 25 apertures (2)
549- 723 25F7.3 mag e_BFlux ?=- Mean error on 25 B-band fluxes (2)
725- 899 25F7.3 mag VFlux ?=- V-band flux in 25 apertures (2)
900-1074 25F7.3 mag e_VFlux ?=- Mean error on 25 V-band fluxes (2)
1076-1250 25F7.3 mag IFlux ?=- I-band flux in 25 apertures (2)
1251-1425 25F7.3 mag e_IFlux ?=- Mean error on 25 I-band fluxes (2)
1427-1601 25F7.3 mag JFlux ?=- J-band flux in 25 apertures (2)
1602-1776 25F7.3 mag e_JFlux ?=- Mean error on 25 J-band fluxes (2)
1778-1952 25F7.3 mag HFlux ?=- H-band flux in 25 apertures (2)
1953-2127 25F7.3 mag e_HFlux ?=- Mean error on 25 H-band fluxes (2)
2129-2303 25F7.3 mag KFlux ?=- K-band flux in 25 apertures (2)
2304-2478 25F7.3 mag e_KFlux ?=- Mean error on 25 K-band fluxes (2)
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Note (1): pixel size: 1pix=0.1194"
Note (2): The diameters of the 25 circular apertures are, in pixels:
1.9499 3.9057 5.8916 7.8825 9.8793
11.8771 13.8746 15.8732 17.8728 19.8707
21.8704 23.8695 25.8687 27.8685 29.8682
31.8686 33.8673 35.8670 37.8676 39.8673
41.8669 43.8664 45.8660 47.8661 49.8657
i.e. in arcsec:
0.23 0.47 0.70 0.94 1.18 1.42 1.66 1.90 2.13 2.37 2.61 2.85 3.09
3.33 3.57 3.81 4.04 4.28 4.52 4.76 5.00 5.24 5.48 5.72 5.95
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Byte-by-byte Description of file: redshift.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [LFR2003] Sequential number (1)
7- 11 F5.2 --- zph Photometric redshift (3)
13- 17 F5.2 --- zphl Lower value of photometric redshift
interval (68% confidence)
19- 23 F5.2 --- zphu Upper value of photometric redshift
interval (68% confidence)
26- 30 F5.3 --- zsp ?=- Spectroscopic redshift
32- 34 F3.1 --- r_zsp ?=- Spectroscopic redshift references (2)
36 I1 --- St [0/1] 1 if SED is better fit with star (3)
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Note (1): Notes on individual objects:
* objects 290, 292, and 657 are also observed by 4
* object 686 is also observed by 5 with zspec=0.95
* object 312 encompasses two objects (id=1095 and 1098) from 6.1 with
identical zspec.
Note (2): Spectroscopic references as follows:
1 = Rigopoulou et al., 2000ApJ...537L..85R 2000ApJ...537L..85R
2 = Cristiani et al., 2000A&A...359..489C 2000A&A...359..489C
3 = Glazebrook, in prep. (from www site)
4 = Rudnick et al., in prep. (in Thesis)
5 = Rigopoulou private comm.
6.1= Vanzella et al., 2002A&A...396..847V 2002A&A...396..847V
6.4= Dennefeld et al., in prep (presented in Vanzella)
Note (3): St is set to 1 when SED is better fit with star;
in this case, the photometric redshifts have been multiplied by -1.
Some stars were extended and have been reclassified as galaxies:
155, 230, 296, 323; and some stars were saturated, they were
classified by hand: 39, 51
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Byte-by-byte Description of file: lum.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [LFR2003] Sequential number
8- 16 E9.3 solLum LU Rest-frame luminosity in U band
18- 26 E9.3 solLum LUl Lower value of LU 68% confidence interval
28- 36 E9.3 solLum LUh Upper value of LU 68% confidence interval
39- 47 E9.3 solLum LB Rest-frame luminosity in B band
49- 57 E9.3 solLum LBl Lower value of LB 68% confidence interval
59- 67 E9.3 solLum LBh Upper value of LB 68% confidence interval
70- 78 E9.3 solLum LV Rest-frame luminosity in V band
80- 88 E9.3 solLum LVl Lower value of LV 68% confidence interval
90- 98 E9.3 solLum LVh Upper value of LV 68% confidence interval
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History:
Copied at http://www.strw.leidenuniv.nl/~fires/data/hdfs/data
Fluxes were converted into magnitudes with the formula:
mag(AB) = 25. - 2.5log(Flux),
and errors on fluxes into mag errors (1.086*σF/F)
(End) Patricia Vannier, Francois Ochsenbein [CDS] 27-Dec-2008