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ATHDFSOID - Australia Telescope Hubble Deep Field-South Optical Identifications Catalog |
HEASARC Archive |
Overview
The Australia Telescope Hubble Deep Field-South (ATHDF-S) survey of the Hubble Deep Field-South (HDF-S) reaches sensitivities of ~ 10 µJy (µJy) at 1.4, 2.5, 5.2, and 8.7 GHz, making the ATHDF-S one of the deepest surveys ever performed with the Australia Telescope Compact Array (ATCA). This table contains the optical identifications of the ATHDF-S radio sources (the radio data from which are available in summarized form in the HEASARC ATHDFSCCAT table) using data from the literature. The authors find that ~ 66% of the radio sources have optical counterparts to an I magnitude of 23.5 mags. Deep Hubble Space Telescope (HST) imaging of the area identifies a further 12% of the radio sources. In this table, the authors present data from new spectroscopic observations for 98 of the radio sources and supplement these spectroscopic redshifts with photometric ones calculated from five-band optical imaging.The radio observations and data reduction are detailed in Papers I-III of this series:
I = Norris et al., 2005, AJ, 130, 1358;
II = Huynh et al., 2005, AJ, 130, 1373, available at the HEASARC as the
ATHDFS1P4G table;
III = Huynh et al., 2007, AJ, 133, 1331, available at the HEASARC as the
ATHDFSCCAT and ATHDFS3FRQ tables.
Palunas et al. (2000, ApJ, 541, 61) observed the HDF-S region using the Big
Throughput Camera (BTC) on the Cerro Tololo Inter-American Observatory (CTIO)
4m during 1998 September. Images were taken in the Sloan Digital Sky Survey
(SDSS) u, Johnson B and V, and Cousins R and I filters. In addition, the
authors obtained spectra of the ATHDF-S radio sources over two service nights
in 2001 July and 2003 October using the multi-fiber 2dF instrument of the
Anglo-Australian Telescope (AAT). They acquired low-resolution (9 Angstrom)
spectra over the wavelength range from 3800 to 8000 Angstroms.
Catalog Bibcode
2008AJ....135.2470HReferences
Radio observations of the Hubble Deep Field-South region.
IV. Optical properties of the faint radio population.
Huynh M.T., Jackson C.A., Norris R.P., Fernandez-Soto A.
<Astron. J., 135, 2470-2495 (2008)>
=2008AJ....135.2470H
Provenance
This table was created by the HEASARC in December 2012 based on the CDS Catalog J/AJ/135/2470 files table1.dat and table10.dat which contain the entire contents of Tables 1 and 10 from the published paper.Parameters
Name
The source designation for the ATHDF-S radio sources, e.g., 'ATHDFS
JHHMMSS.s+DDMMSSA', as given by the authors and recommended by the CDS
Dictionary of Nomenclature of Celestial Objects, using the 'ATHDFS' prefix
(Australia Telescope Hubble Deep Field-South) and the J2000.0 equatorial
coordinates of the source. The suffixes 'A', 'B', etc., are used for
components of multiple sources.
RA
The Right Ascension of the radio source in the selected equinox. This
was not given in the present reference (Paper IV) but was taken from Table 9
of paper III, the 'Combined ATHDFS Catalog'. The RA was given therein in
J2000.0 coordinates to a precision of 0.01 seconds of time.
Dec
The Declination of the radio source in the selected equinox. This
was not given in the present reference (Paper IV) but was taken from Table 9
of paper III, the 'Combined ATHDFS Catalog'. The Dec was given therein in
J2000.0 coordinates to a precision of 0.1 arcseconds.
LII
The Galactic Longitude of the radio source.
BII
The Galactic Latitude of the radio source.
CTIO_Flag
This flag parameter gives the status of the CTIO counterpart
to the radio source:
YES = there is a CTIO counterpart within the 1.8 arcsec matching radius,
NO = there is no CTIO counterpart within the 1.8 arcsec matching radius,
S = there is a nearby bright star which may affect the photometry,
OUT = the source lies outside of the CTIO images.
CTIO_Source_Number
The CTIO source ID, corresponding to the source number
from the CTIO Catalog (P. Palunas et al. 2008, submitted).
Umag
The SDSS u-band magnitude (in the AB System) of the CTIO counterpart
to the radio source.
Umag_Error
The rms error in the corresponding magnitude.
Bmag
The Johnson B-band magnitude (in the AB System) of the CTIO counterpart
to the radio source.
Bmag_Error
The rms error in the corresponding magnitude.
Vmag
The Johnson V-band magnitude (in the AB System) of the CTIO counterpart
to the radio source.
Vmag_Error
The rms error in the corresponding magnitude.
Rmag
The Cousins R-band magnitude (in the AB System) of the CTIO counterpart
to the radio source.
Rmag_Error
The rms error in the corresponding magnitude.
Imag
The Cousins I-band magnitude (in the AB System) of the CTIO counterpart
to the radio source.
Imag_Error
The rms error in the corresponding magnitude.
Phot_Redshift
The photometric redshift zphot of the CTIO counterpart
to the radio source. The technique for calculating the zphot
values is described in section 4 of the reference paper.
Phot_Redshift_Error
The uncertainty in the photometric redshift zphot. The
reliability of the zphot estimates is described in section 4 of the
reference paper.
Wfpc2_Flag
This HEASARC-created flag parameter is set to 'Y' to indicate
that information on a WFPC2 counterpart to the radio source is presented in
Table 2 and/or Table 5 of the reference paper, and is also presented here
(notice that the source ATHDFS J223247.6-603337 is listed twice below as
a counterpart was detected in both the main deep field and a flanking field
observation):
Summary of WFPC2 Counterparts in Main Deep Field Observations (Table 2) and Flanking Fields (Table 5)
Table ATHDFS Name FF ID F300 F450 F606 F814 Morphological Information
(mag) (mag) (mag) (mag)
2 ATHDFS J223258.5-603346 27.53 0.68 28.48 0.77 27.05 0.13 25.12 0.04 No info
2 ATHDFS J223247.6-603337 22.70 0.02 21.69 0.00 20.55 0.00 19.55 0.00 Late-type spiral
2 ATHDFS J223253.1-603329 25.00 0.07 24.31 0.02 23.69 0.01 22.56 0.00 No info
2 ATHDFS J223302.8-603323 25.45 0.19 23.60 0.02 23.36 0.01 22.79 0.01 Barred spiral
5 ATHDFS J223207.9-603928 WdpVI 26.46 0.21 25.61 0.15 No info
5 ATHDFS J223253.7-603921 W9 21.12 0.01 Possible merging system
5 ATHDFS J223245.6-603857 W9 23.91 0.04 No info
5 ATHDFS J223248.2-603805 W9 20.90 0.01 Edge-on disk galaxy
5 ATHDFS J223254.5-603748 W9 18.44 0.00 Barred spiral
5 ATHDFS J223202.5-603714 WdpVI 25.86 0.11 24.17 0.04 Possible merging system
5 ATHDFS J223253.0-603539 W6 23.45 0.04 No info
5 ATHDFS J223245.3-603537 W6 24.04 0.06 No info
5 ATHDFS J223338.8-603523 W8 18.99 0.00 Early-type spiral
5 ATHDFS J223344.9-603515 W8 19.51 0.00 Spiral galaxy in merging system
5 ATHDFS J223350.5-603503 W8 26.24 0.19 No info
5 ATHDFS J223307.1-603448 W3 24.83 0.08 No info
5 ATHDFS J223243.3-603443 W2 19.32 0.00 Merging system
5 ATHDFS J223245.5-603419 W2 21.10 0.01 Possible merger
5 ATHDFS J223311.9-603417 W3 23.93 0.05 No info
5 ATHDFS J223306.0-603350 W3 17.25 0.00 Face-on spiral
5 ATHDFS J223243.4-603352 W2 19.87 0.00 Point-like, quasar
5 ATHDFS J223247.6-603337 W2 19.64 0.01 Spiral
5 ATHDFS J223337.5-603329 W8 17.70 0.00 Bright point source (STIS QSO)
5 ATHDFS J223339.4-603306 W8 24.81 0.10 No info
5 ATHDFS J223308.6-603251 W1 21.03 0.01 Spheroidal
5 ATHDFS J223317.7-603235 W4 20.83 0.01 Spheroidal
5 ATHDFS J223331.6-603222 W7 20.38 0.01 Merging system, triple nuclei
5 ATHDFS J223303.1-603132 W1 24.05 0.05 No info
Nicmos_Flag
This HEASARC-created flag parameter is set to 'Y' to indicate
that information on a NICMOS counterpart to the radio source is presented in
Table 3 and/or Table 5 of the reference paper, and is also presented here:
Summary of NICMOS Counterparts in Main Deep Field Observations (Table 3) and Flanking Fields (Table 5)
Table ATHDFS Name FF ID F110 F160 F222 Morphological Information
(mag) (mag) (mag)
3 ATHDFS J223253.7-603921 21.20 0.05 19.97 0.02 19.38 0.07 No info
5 ATHDFS J223250.6-604336 N9 22.06 0.02 Possible merging system
5 ATHDFS J223337.5-604006 N8 19.66 0.00 Merging system
5 ATHDFS J223334.4-603804 N7 22.30 0.09 No info (at edge of image)
5 ATHDFS J223210.3-604433 dpJH 20.45 0.03 19.83 0.01 No info (at edge of image)
Stis_Flag
This HEASARC-created flag parameter is set to 'Y' to indicate
that information on a STIS counterpart to the radio source is presented in
Table 4 and/or Table 5 of the reference paper, and is also presented here:
Summary of STIS Counterparts in Main Deep Field Observations (Table 4) and Flanking Fields (Table 5)
Table ATHDFS Name FF ID 50ccd lp NUV FUV Morphological Information
(mag) (mag) (mag) (mag)
4 ATHDFS J223337.5-603329 17.83 0.00 17.48 0.00 . .. ... 29.13 0.00 Bright point source (STIS QSO)
4 ATHDFS J223339.4-603306 24.76 0.01 24.46 0.04 41.00 0.00 37.33 0.00 Irregular and disturbed, Possible
merging system
5 ATHDFS J223425.0-603452 S8 23.18 0.01 Disturbed, merging system
5 ATHDFS J223327.6-603414 S2 28.17 0.18 No info
Redshift
The spectroscopic redshift z of the counterpart derived from the
2dF low-resolution spectrum. Redshifts were obtained for 98 out of the 268
targeted sources.
Redshift_Flag
This flag parameter represents the quality Q of the 2dF
spectroscopy from which the redshift was obtained.
A value of 3 indicates three or more lines were identified, and hence
the redshift is very well determined. Two, one or no lines identified
are indicated by Q values of 2, 1 or 0, respectively.
H_Beta_Flux_Limit
This parameter is set to '<' if the corresponding
parameter value is an upper limit rather than an actual measurement.
H_Beta_Flux
The H-beta line flux, in CCD Counts, of the optical
counterpart to the radio source as measured in the 2dF spectrum.
H_Beta_Flux_Error
The uncertainty in the corresponding line flux, in CCD
counts.
O_III_Flux_Limit
This parameter is set to '<' if the corresponding
parameter value is an upper limit rather than an actual measurement.
O_III_Flux
The O III 5007-Angstrom line flux, in CCD Counts, of the optical
counterpart to the radio source as measured in the 2dF spectrum.
O_III_Flux_Error
The uncertainty in the corresponding line flux, in CCD
counts.
H_Alpha_Flux
The H-alpha line flux, in CCD Counts, of the optical
counterpart to the radio source measured in the 2dF spectrum.
H_Alpha_Flux_Error
The uncertainty in the corresponding line flux, in CCD
counts.
N_II_Flux_Limit
This parameter is set to '<' if the corresponding
parameter value is an upper limit rather than an actual measurement.
N_II_Flux
The N II 6584-Angstrom Line Flux line flux, in CCD Counts, of the
optical counterpart to the radio source measured in the 2dF spectrum.
N_II_Flux_Error
The uncertainty in the corresponding line flux, in CCD
counts.
Spectra_Comments
This parameter contains comments on the optical 2dF
spectra, including which lines were observed.
Broad_Type
A broad classification of the optical spectrum of
the counterpart to the radio source, given for those 98 sources
for which spectroscopic redshifts were obtained (this field is left
blank for the remaining 375 sources), and coded as follows:
abs = galaxy with absorption-line spectrum (22/98 = 22%)
sf = star-forming galaxy (36/98 = 37%)
sy = Seyfert galaxy (6/98 = 6%)
BL = broad-line AGN (7/98 = 7%)
unc = unclassified object
Class
The HEASARC Browse object classification based on the value of the
broad_type parameter.
Contact Person
Questions regarding the ATHDFSOID database table can be addressed to the HEASARC Help Desk.Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:24:42 EDT
- HEASARC Director: Dr. Andy Ptak
- NASA Official: Dr. Andy Ptak
- Web Curator: J.D. Myers
- Last Modified: 16-Sep-2024