J/A+A/341/641 NTT SUSI Deep Field (Arnouts+, 1999)
The NTT SUSI Deep Field.
Arnouts S., D'Odorico S., Cristiani S., Zaggia S., Fontana A.,
Giallongo E.
<Astron. Astrophys. 341, 641 (1999)>
=1999A&A...341..641A 1999A&A...341..641A (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry
Keywords: galaxy: stellar content - galaxies: evolution -
cosmology: observations - cosmology: large-scale structure of Universe
Description:
This catalog contains BVrI photometry of galaxies in a 5.62arcmin2
field 80arcsec south of the high redshift (z=4.7) quasar BR 1202-0725,
derived from observations with the direct CCD camera SUSI at the ESO
NTT. The formal 5σmagnitude limits (in 2xFWHM apertures) are
26.9, 26.5, 25.9 and 25.3 in B, V, r and I respectively. Reliable
colors have been measured for galaxies selected down to r=26. The
choice of the optical filters has been optimized to define a robust
multicolor selection of galaxies at 3.8≤z≤4.4.
The catalogue has been processed with the SExtractor algorithm
(Bertin, 1996A&AS..117..393B 1996A&AS..117..393B) and contains 608 objects detected on the
image resulting from the sum of the four weighted frames (B, V, r, I)
by convolving the reference frame by the PSF and then thresholding it
at 1.1 σ of the background r.m.s. For quantitative analysis,
border areas with larger noise due to the combination of dithered
exposures with shorter integration times should be used with caution.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 214 608 NTT SUSI Deep Field catalogue
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- NDFa Identification number (NTT Deep Field a)
5- 11 F7.2 pix Xpos X position
13- 19 F7.2 pix Ypos Y position
21- 22 I2 h RAh Right Ascension, equinox J2000
24- 25 I2 min RAm Right Ascension, equinox J2000
27- 31 F5.2 s RAs Right Ascension, equinox J2000
33 A1 --- DE- Declination sign, equinox J2000
34 I1 deg DEd Declination, equinox J2000
36- 37 I2 arcmin DEm Declination, equinox J2000
39- 43 F5.2 arcsec DEs Declination, equinox J2000
45- 49 F5.2 mag Bmag B total magnitude in natural system (1)
51- 55 F5.2 mag e_Bmag [-1/0.39] rms uncertainty on Bmag (2)
57- 61 F5.2 mag Vmag V total magnitude in natural system (1)
63- 67 F5.2 mag e_Vmag [-1/0.43] rms uncertainty on Vmag (2)
69- 73 F5.2 mag rmag r total magnitude in natural system (1)
75- 79 F5.2 mag e_rmag [-1/0.39] rms uncertainty on rmag (2)
81- 85 F5.2 mag Imag I total magnitude in natural system (1)
87- 91 F5.2 mag e_Imag [-1/0.46] rms uncertainty on Imag (2)
93- 97 F5.2 pix FWHM Full Width Half Maximum (3)
99-100 I2 --- Flag [0/24] SExtractor flag
102-105 F4.2 --- Class Star/galaxy classifier (4)
107-111 F5.2 pix a Semi major axis length (3)
113-117 F5.2 pix b Semi minor axis length (3)
119-124 F6.2 deg Theta Inclination angle (3)
126-130 F5.2 --- elong Elongation (a/b) (3)
132-137 F6.4 --- e Ellipticity (1-b/a) (3)
139-142 I4 pix AREA Isophotal area (in pixel) (3)
144-148 F5.2 mag B-V B-V colour index in AB system (5)
150-154 F5.2 mag e_B-V [-3/0.57] Quadratic error on B-V (6)
156-160 F5.2 mag B-R B-R colour index in AB system (5)
162-166 F5.2 mag e_B-R [-3/0.55] Quadratic error on B-R (6)
168-172 F5.2 mag B-I B-I colour index in AB system (5)
174-178 F5.2 mag e_B-I [-3/0.47] Quadratic error on B-I (6)
180-184 F5.2 mag V-R V-R colour index in AB system (5)
186-190 F5.2 mag e_V-R [-3/0.61] Quadratic error on V-R (6)
192-196 F5.2 mag V-I V-I colour index in AB system (5)
198-202 F5.2 mag e_V-I [-2/0.47] Quadratic error on V-I (6)
204-208 F5.2 mag R-I R-I colour index in AB system (5)
210-214 F5.2 mag e_R-I [-3/0.45] Quadratic error on R-I (6)
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Note (1): The total magnitudes are isophotal magnitudes (at 1σ) if the
isophotal area is larger than 2.2arcsec aperture (17 pix) or they
are measured inside the 2.2arcsec apertures corrected to 5arcsec
by assuming stellar wings. They are in natural photometric systems
and galactic absorption has been applied.
Note (2): Objects with computed magnitudes fainter than the expected
magnitude limits at 1σ in 2.2arcsec aperture (28.2,
27.7, 27.0, 26.3 in B, V, r, I) have been assigned an upper
limit and a value of -1 is entered for the associated error.
Note (3): Shape parameters in columns FWHM to AREA are given from the I
image which has the best seeing.
Note (4): Classifier provided by SExtraxtor applied to the I band, to
which corresponds the best PSF. This classifier gives output
values in the range 0-1 (0 for galaxies and 1 for stars).
Note (5): Colours have been computed by the difference of adaptive
apertures for bright objects (isophotal area>180pixels, I≤23)
and for the faintest ones inside the 2 arcsec apertures (∼15pixels).
For these measurements the I frame has been degraded to the
worst seeing of the B band.
Note (6): When there is an upper limit, the error is -3.00, -2.00 or -1.00.
For example, colour = B-A
if B is upper-limit and not A, e_B-A=-1
if A is upper-limit and not B, e_B-A=-2
if B and A are both upper-limits, e_B-A=-3
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History: Copied at http://www.eso.org/science/ndf/
(End) Patricia Bauer [CDS] 26-Feb-1999