J/AJ/120/2747 HDF-South WFPC2 observations (Casertano+, 2000)
WFPC2 observations of the Hubble Deep Field South.
Casertano S., De Mello D.F., Dickinson M., Ferguson H.C., Fruchter A.S.,
Gonzalez-Lopezlira R.A., Heyer I., Hook R.N., Levay Z., Lucas R.A., Mack J.,
Makidon R.B., Mutchler M., Smith T.E., Stiavelli M., Wiggs M.S.,
Williams R.E.
<Astron. J. 120, 2747 (2000)>
=2000AJ....120.2747C 2000AJ....120.2747C
ADC_Keywords: Galaxies, photometry
Mission_Name: HST
Keywords: cosmology: observations - galaxies: evolution - galaxies: statistics
Abstract:
The Hubble Deep Field South (HDF-S) observations targeted a high
Galactic latitude field near QSO J2233-606. We present Wide Field
Planetary Camera 2 observations of the field in four wide bandpasses
centered at roughly 300, 450, 606, and 814 nm. Observations, data
reduction procedures, and noise properties of the final images are
discussed in detail. A catalog of sources is presented, and the number
counts and color distributions of the galaxies are compared with a new
catalog of the original Hubble Deep Field (HDF-N) that has been
constructed in an identical manner. The two fields are qualitatively
similar, with the galaxy number counts for the two fields agreeing to
within 20%. The HDF-S has more candidate Lyman break galaxies at z>2
than the HDF-N. The star formation rate per unit volume computed from
the HDF-S, based on the UV luminosity of high-redshift candidates, is
a factor of 1.9 higher than from the HDF-N at z∼2.7, and a factor of
1.3 higher at z∼4.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6.dat 97 2657 Object catalog for the HDF-S WFPC2 field
--------------------------------------------------------------------------------
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/ApJ/538/493 : HDF-South NICMOS field (Yahata+, 2000)
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [CDD2000] SExtractor identification number (1)
7- 8 I2 h RAh Right Ascension (J2000)
10- 11 I2 min RAm Right Ascension (J2000)
13- 17 F5.2 s RAs Right Ascension (J2000)
19 A1 --- DE- Declination (J2000)
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000
26- 29 F4.1 arcsec DEs Declination (J2000)
31- 37 F7.2 pix Xpix The x pixel position in the version 2 images
39- 45 F7.2 pix Ypix The y pixel position in the version 2 images
47- 51 F5.2 mag Imag ? Isophotal F814W magnitude (2)
53- 56 F4.2 mag e_Imag ? The uncertainty in Imag (2)
58- 62 F5.2 mag Emag ? The elliptical (Kron, 1980ApJS...43..305K 1980ApJS...43..305K)
magnitude (3)
64- 68 F5.2 mag u-b ? The (U{F300W} - B{F450W}) color (4)
70- 74 F5.2 mag b-v ? The (B{F450W} - V{F606W}) color (4)
76- 80 F5.2 mag v-i ? The (V{F606W} - I{F814W}) color (4)
82- 86 I5 marcsec Half Half-light radius (5)
88- 91 F4.2 --- Class [0,1] Star-galaxy classification parameter (6)
93- 96 A4 --- f_[CDD2000] Object flags (7)
--------------------------------------------------------------------------------
Note (1): The objects in the list have been sorted by Right Ascension (first)
and Declination (second), and thus are no longer in catalog order. In
addition, the numbers are no longer continuous, as some of the object
identifications from the first SExtractor run have been removed.
Objects from the second SExtractor run have had 10000 added to their
identification numbers. These identification numbers provide a
cross-reference to the segmentation maps.
Note (2): The magnitudes are given in the AB system (Oke, 1971ApJ...170..193O 1971ApJ...170..193O),
where m = -2.5 log fν - 48.60.
Note (3): Determined from the sum of the counts in an elliptical aperture.
The semi-major axis of this aperture is defined by 2.5 times the first
moments of the flux distribution within an ellipse roughly twice the
isophotal radius, with a minimum semi-major axis of 3.5 pixels.
Note (4): When the measured flux in the bluer band is less than 2σ,
we list the 2-sigma upper-limit to the color determined from the
photometric errors in the aperture. If both bands are upper limits, no
color is listed. The magnitudes are given in the AB system (Oke,
1971ApJ...170..193O 1971ApJ...170..193O), where m = -2.5 log fν - 48.60.
Note (5): Defined by SExtractor as the radius at which a circular aperture
contains half of the flux in the elliptical aperture.
Note (6): Determined by a neural network within SExtractor, and based
upon the morphology of the object in the detection images (see Bertin
& Arnouts, 1996A&AS..117..393B 1996A&AS..117..393B, for a detailed description of the
neural network). Classifications near 1.0 are more like a point
source, while classifications near 0.0 are more extended.
Note (7): Each flag is set if the condition is satisfied in at least one filter.
a = Object has near neighbors (more than 10% of Emag area overlaps
detected objects)
b = Object was originally blended with another
c = At least one pixel is saturated
d = Object's aperture data is incomplete or corrupted
e = Object is off the image, or within 30 pixels of the edge
f = Object lies on top of a diffraction spike
g = Photometry is from the second run of SExtractor.
--------------------------------------------------------------------------------
History:
From AJ electronic version
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 02-Feb-2001