J/A+AS/141/257 ISOCAM obs. of very deep IRAS 60um sources (Aussel+, 2000)
ISOCAM observations of the very deep IRAS 60 micron sample in the NEP region.
I. The data.
Aussel H., Coia D., Mazzei P., De Zotti G., Franceschini A.
<Astron. Astrophys. Suppl. Ser. 141, 257 (2000)>
=2000A&AS..141..257A 2000A&AS..141..257A
ADC_Keywords: Surveys ; Galaxies, IR
Keywords: surveys - galaxies: photometry - galaxies: starburst -
infrared: galaxies
Abstract:
We present the results of ISO observations with the CAM LW3 filter,
centered at λeff=14.3µm, of 94 out of the 98 galaxies
comprising the complete 60µm IRAS deep survey (IDS) sample in the
north ecliptic polar region. In addition, we observed a source
detected by IRAS at 25µm and found to have particularly interesting
properties. Altogether, 106 sources were detected with a signal to
noise ratio ≥3 and 69 with S/N≥5 in the 3.2'x3.2' fields centered on
the nominal positions of IRAS sources. Sixty-five ≥3σ
detections (49 of which at ≥5σ) are likely identifications of
IRAS sources. Ten additional IRAS sources have possible ≥3σ
ISOCAM counterparts. In 6 further cases, signals at the 2-3σ
level were detected close to the IRAS position. Indications that IRAS
sources might actually be multiple (source confusion) were found in 4
IDS fields. On the whole, we confirm the reality of 69 to 90% of IDS
sources. Appropriate statistical corrections for the bias affecting
faint flux estimates were applied to ISOCAM data. Ten serendipitous
sources were detected at ≥5σ, with S(14.3µm)≥3.5mJy. The
corresponding areal density is consistent with that found in previous
surveys. Finding charts for all observed fields are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 95 Observing log (IRAS deep survey targets)
table2.dat 66 120 ISOCAM sources
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See also:
II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989)
II/275 : IRAS Faint Source Reject Catalog (IPAC 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- [HH87] HH87 designation of the source
(Hacking & Houck, 1987ApJS...63..311H 1987ApJS...63..311H)
6- 15 A10 --- IRAS IRAS-FSS designation (Cat. II/256 and II/275)
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 26 F4.1 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 36 I2 arcsec DEs Declination (J2000)
38- 40 I3 s Time Total time spent on each target
42- 49 A8 "DD/MM/YY" Date Observation date
51- 58 I8 --- TDT TDTOSN number identifying each observation
in the ISO data archive
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- [HH87] Name of the target, as in table1
5 A1 --- m_[HH87] [ABCD] ISOCAM source (2)
7- 8 I2 h RAh ? ISOCAM right ascension (J2000)
10- 11 I2 min RAm ? ISOCAM right ascension (J2000)
13- 17 F5.2 s RAs ? ISOCAM right ascension (J2000)
19 A1 --- DE- ISOCAM declination sign (J2000)
20- 21 I2 deg DEd ? ISOCAM declination (J2000)
23- 24 I2 arcmin DEm ? ISOCAM declination (J2000)
26- 29 F4.1 arcsec DEs ? ISOCAM declination (J2000)
31- 35 F5.1 arcsec Diff ? IRAS-ISOCAM position difference
37 A1 --- l_S14.3um Limit flag on S14.3um
38- 41 F4.1 Jy S14.3um ? ISOCAM flux density at 14.3um
44- 46 F3.1 Jy e_S14.3um ? rms uncertainty on S14.3um
48 A1 --- n_S14.3um ? [2-6] Note on S14.3um (1)
51- 54 F4.1 mJy SML ? Maximum likelihood value of the flux density
for sources detected at ≥5σ
56- 58 F3.1 mJy e_SML ? rms uncertainty on SML
60- 66 E7.2 --- nc ? Mean number of chance objects
(nc=π*Δ(IRAS-ISO)2N(>S14.3um))
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Note (1): Notes as follows:
2 = The source is reliably detected. Its flux, however, is highly
uncertain due to a cosmic ray impact near the source.
3 = The image of this source extends over the dead Col. 23; therefore
part of its flux is lost. The given value includes a correction
for the missing flux, based on the flux distribution in
neighboring pixels.
4 = Although the flux is measured at a <3σ level, the signal is
detected at >3σ, in the brightest pixel.
5 = Photometry based on the negative imprint produced by
beam-switching; the positive one is at the edge of the field.
6 = Photometry based on the negative imprint; the positive one gives
a less significant signal (1.7±0.7mJy).
Note (2): Set to 'A', 'B', ... for the first, second, ... source detected
in the IRAS deep field target. Source identified as [ACM2000] N-NNA in
Simbad, e.g. source A of [HH87] 3-07 is [ACM2000] 3-07A in Simbad.
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 03-Apr-2000