J/A+A/454/453 BR photometry and redshifts of IDS galaxies (Della Valle+, 2006)
A multi-wavelength study of the IRAS Deep Survey galaxy sample.
I. Optical observations. The redshift distribution.
Della Valle A., Mazzei P., Bettoni D., Aussel H., De Zotti G.
<Astron. Astrophys., 454, 453-458 (2006)>
=2006A&A...454..453D 2006A&A...454..453D
ADC_Keywords: Galaxies, IR ; Galaxies, photometry ; Redshifts
Keywords: methods: observational - techniques: photometric -
techniques: spectroscopic - galaxies: distances and redshifts -
galaxies: photometry - galaxies: evolution
Abstract:
The IRAS Deep Survey (IDS) of the North Ecliptic Pole region remains
one of the deepest complete far-infrared-selected galaxy samples
available. ISOCAM observations in the LW3 filter (12-18µm) of
3.2'x3.2' fields centered on the nominal positions of 94 out of the 98
IDS sources yielding 116 ISOCAM detections. The resulting sample has
allowed us to assess the source reliability, identify confusion
effects, and pinpoint optical counterparts.
To fully exploit the potential of this sample for investigating galaxy
evolution, we carried out optical observations of candidate
identifications to 100 out of the 116 ISOCAM sources.
Optical imaging was acquired for 88 galaxies in 54 IDS fields: 44
galaxies were imaged in both the B- and the R-band, 33 only in the
R-band, and 11 only in the B-band. These observations aimed at
extending the MIR/FIR spectral energy distribution to the optical
region and achieving morphological information. In addition, spectra
were obtained for 65 IDS fields, 20 of which had not been observed
before. Redshifts were measured for the 85 galaxies found within the
positional error circles of 77 ISOCAM sources detected in those IDS
fields.
Description:
Our program of optical imaging observations in B and R bands was
carried out from 2000 to 2002. We acquired both B- and R-band imaging
of 44 galaxies in the fields around 37 ISOCAM sources detected in 28
IDS fields. Imaging only in the R-band was obtained for 33 galaxies
within the error boxes of 26 additional ISOCAM sources in 21 IDS
fields. Moreover, we have images only in the B-band of 11 galaxies,
candidate counterparts to 5 additional ISOCAM sources in 5 IDS fields.
The optical spectroscopy was carried out from 2000 to 2003 using
different telescopes: the Asiago Cima Ekar 1.82m telescope, the TNG,
and the Keck II telescope, which was appropriate given the magnitude
of the target.
Spectroscopic observations were made for 90 optical sources in 65 IDS
fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 71 122 Redshifts of IDS/ISOCAM galaxies
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See also:
J/A+AS/141/257 : ISOCAM obs. of very deep IRAS 60um sources (Aussel+, 2000)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- [DMB2006] Name of the source (3)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 31 F4.1 arcsec DEs Declination (J2000)
33- 36 A4 --- RunS Spectral run (1)
38 I1 --- RunI ?=- Imaging run (2)
40- 45 F6.4 --- z ? Redshift
46 A1 --- n_z [*] *: estimated redshifts
47 A1 --- f_z [s] s: star
49- 53 F5.2 mag Bmag ?=- B magnitude
55- 58 F4.2 mag e_Bmag ?=- rms uncertainty in Bmag
60- 64 F5.2 mag Rmag ?=- R magnitude
66- 69 F4.2 mag e_Rmag ?=- rms uncertainty on Rmag
71 A1 --- Cs [y/n] 'y' if belongs to complete sample of 56
IDS sources with S(60µm)> 80mJy defined by
Mazzei et al. (2001NewA....6..265M 2001NewA....6..265M).
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Note (1): Spectroscopic runs as follows:
1 = Cima Ekar 1.82m telescope + AFOSC (June 00)
2 = TNG + DOLORES (May 01)
4 = Cima Ekar 1.82m telescope + AFOSC (August 01)
6 = Cima Ekar 1.82m telescope + AFOSC (October 03)
7 = TNG + DOLORES (June 02)
8 = Keck II + ESI (June 02)
9 = Cima Ekar 1.82m telescope + AFOSC (June 02)
10 = Keck II + ESI (September 02)
Note (2): Imaging runs as follows:
1 = TNG + OIG (April 00, photometric nights)
2 = TNG + OIG (May 00)
3 = TNG + DOLORES (May 01)
4 = Keck II + ESI (July 01, photometric nights)
5 = TNG + DOLORES (June 02, photometric nights)
Note (3): the source is named from the HH87 target name (Hacking & Houck,
1987ApJS...63..311H 1987ApJS...63..311H), followed by a letter corresponding to the
ISOCAM source in Aussel et al. 2000 (Cat. J/A+AS/141/257)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Jan-2007