J/MNRAS/325/1173 ISO ELAIS 15µm survey (Lari+, 2001)
A new method for ISOCAM data reduction -
I. Application to the European Large Area ISO Survey Southern Field:
method and results.
Lari C., Pozzi F., Gruppioni C., Aussel H., Ciliegi P., Danese L.,
Franceschini A., Oliver S., Rowan-Robinson M., Serjeant S.
<Mon. Not. R. Astron. Soc. 325, 1173 (2001)>
=2001MNRAS.325.1173L 2001MNRAS.325.1173L
ADC_Keywords: Surveys ; Galaxies, IR
Mission_Name: ISO
Keywords: method: data analysis - surveys - galaxies: actives -
galaxies: starburts - cosmology: observations - infrared: galaxies
Abstract:
We develop a new data reduction technique for ISOCAM LW data and apply
it to the European Large Area ISO Survey (ELAIS) LW3 (15-µm)
observations in the southern hemisphere (S1). This method, known as
LARI technique and based on the assumption of the existence of two
different time-scales in ISOCAM transients (accounting for either fast
or slow detector response), is particularly designed for the detection
of faint sources. In the ELAIS S1 field we obtain a catalogue of 462
15-µm sources with signal-to-noise ratios ≥5 and flux densities in
the range 0.45-150mJy (filling the whole flux range between the Deep
ISOCAM Surveys and the IRAS Faint Source Survey). The completeness at
different flux levels and the photometric accuracy of this catalogue
are tested with simulations. Here we present a detailed description of
the method and discuss the results obtained by its application to the
S1 LW3 data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 102 462 THE ELAIS S1 CAM catalogue at 15 micron
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See also:
J/MNRAS/305/297 : ISO ELAIS 1.4GHz survey (Gruppioni+, 1999)
J/MNRAS/302/222 : ISO ELAIS 20cm VLA survey regions (Ciliegi+, 1999)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [ELAIS]
6- 23 A18 --- ELAIS ELAIS designation (C15_JHHMMSS+DDMMSS)
25- 26 I2 h RAh Right ascension (J2000.0)
28- 29 I2 min RAm Right ascension (J2000.0)
31- 35 F5.2 s RAs Right ascension (J2000.0)
37 A1 --- DE- Declination sign (J2000.0)
38- 39 I2 deg DEd Declination (J2000.0)
41- 42 I2 arcmin DEm Declination (J2000.0)
44- 47 F4.1 arcsec DEs Declination (J2000.0)
49- 51 F3.1 arcsec e_RAs Sigma in right ascension
53- 55 F3.1 arcsec e_DEs Sigma in declination
57- 62 F6.3 mJy Fpeak ISO/LW3 source peak flux at 15µm
64- 69 F6.2 --- S/N Signal-to-noise ratio
71- 77 F7.3 mJy Ftot ISO/LW3 total flux at 15µm
79- 84 F6.3 mJy e_Ftot rms uncertainty on Ftot
86- 89 A4 --- Raster Raster name (see astrometry in table3)
91-100 A10 --- Note Notes (1)
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Note (1): "STAR" = the source has been identified as star
"APER" = the total flux has been obtained through aperture photometry
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Table 3: ISO-USNO astrometric corrections.
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Raster Nominal position RA DE
(J2000) offset error (")
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S1_1 00 30 25.4 -42 57 00.3 -2.06±0.40 -4.46±0.38
S1_2 00 31 08.2 -43 36 14.1 -3.24±0.22 +6.86±0.29
S1_3 00 31 51.9 -44 15 27.0 +1.57±0.29 -7.75±0.33
S1_4 00 33 59.4 -42 49 03.1 +0.23±0.22 -4.01±0.27
S1_5A 00 34 44.4 -43 28 12.0 -3.50±0.23 +9.63±0.27
S1_5B 00 34 44.4 -43 28 12.0 -0.52±0.21 -8.10±0.26
S1_5C 00 34 44.4 -43 28 12.0 -3.04±0.24 +5.34±0.29
S1_6 00 35 30.4 -44 07 19.8 +0.60±0.43 -7.14±0.24
S1_7 00 37 32.5 -42 40 41.2 +1.26±0.22 -5.62±0.38
S1_8 00 38 19.6 -43 19 44.5 +0.72±0.22 -5.31±0.24
S1_9 00 39 07.8 -43 58 46.6 -2.34±0.19 +4.61±0.23
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History:
Copied at http://boas5.bo.astro.it/~elais/catalogues/
References:
Olivier et al. ELAIS I 2000MNRAS.316..749O 2000MNRAS.316..749O
Serjeant et al. ELAIS II 2000MNRAS.316..768S 2000MNRAS.316..768S
Efstathiou et al. ELAIS III 2000MNRAS.319.1169E 2000MNRAS.319.1169E
Serjeant et al. ELAIS IV 2001MNRAS.322..262S 2001MNRAS.322..262S
Alexander et al., ELAIS V 2001ApJ...554...18A 2001ApJ...554...18A
Morel et al. ELAIS VI 2001MNRAS.327.1187M 2001MNRAS.327.1187M
(End) James Marcout, Patricia Bauer [CDS] 29-Jan-2002