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J/A+A/427/773   ISOCAM 14.3µm Deep Survey in Lockman Hole (Rodighiero+, 2004)

ISOCAM observations in the Lockman Hole. II. The 14.3µm deep survey: data reduction, catalogue and source counts. Rodighiero G., Lari C., Fadda D., Franceschini A., Elbaz D., Cesarsky C. <Astron. Astrophys. 427, 773 (2004)> =2004A&A...427..773R
ADC_Keywords: Surveys ; Galaxies, IR Mission_Name: ISO Keywords: infrared: galaxies - galaxies: photometry - galaxies: statistics - galaxies: evolution - cosmology: observations - methods: data analysis Abstract: We present a new analysis of the ISOCAM 14.3µm deep survey in a 20x20 square arcmin area in the Lockman Hole. This survey is intermediate between the ultra-deep surveys and the shallow surveys in the ELAIS fields. The data have been analyzed with the method presented by Lari et al. (2001, Cat. J/MNRAS/325/1173). We have produced a catalogue of 283 sources detected above the 5-σ threshold, with fluxes in the interval 0.1-8mJy. The catalogue is 90% complete at 1mJy. The positional accuracy, estimated from the cross-correlation of infrared and optical sources, is around 1.5arcsec. The search for the optical counterparts of the sources in the survey is performed on a medium-deep r' band optical image (5σ depth of r'=25), making use of the radio detections when available. The photometry has been checked through simulations and by comparing the data with those presented in a shallower and more extended ISOCAM survey in the Lockman Hole, that we have presented in a companion paper. Only 15% of the 14.3µm sources do not have an optical counterpart down to r'=25mag. We use the 6.7/14.3µm colour as a star/galaxy separator, together with a visual inspection of the optical image and an analysis of the observed Spectral Energy Distribution of the ISOCAM sources. The stars in the sample turn out to be only 6% of the sample. We discuss the 14.3µm counts of extragalactic sources, combining our catalogue with that obtained from the shallower ISOCAM survey. The data in the two surveys are consistent, and our results fully support the claims in previous works for the existence of an evolving population of infrared galaxies, confirming the evident departure from non-evolutionary model predictions. Description: ISOCAM LW3 14.3µm source catalogue in the deep Lockman Hole area for highly reliable detections with flux >0.22mJy. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 100 283 Coordinates and fluxes of the bright ISOCAM Lockman sources (table2 and 3 in the paper)
See also: J/A+A/427/23 : 14.3um survey in the Lockman Hole (Fadda+, 2004) J/A+A/329/482 : ROSAT Deep Survey in the Lockman Hole (Hasinger+, 1998) J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002) J/A+A/398/901 : VLA survey at 6 cm in the Lockman Hole (Ciliegi+, 2003) J/A+A/413/843 : ISO Deep Far-Infrared Survey in Lockman Hole (Kawara+, 2004) J/AJ/125/2521 : 2MASS6x survey of the Lockman Hole (Beichman+, 2003) J/PASJ/53/445 : ASCA Deep survey in Lockman Hole Field (Ishisaki+, 2001) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Number list 5- 13 A9 --- --- [ISOLHDS] 14- 27 A14 --- ID Identification (based on J2000 position) 30- 31 I2 h RAh Right Ascension J2000 (hours) 33- 34 I2 min RAm Right Ascension J2000 (minutes) 36- 41 F6.3 s RAs Right Ascension J2000 (seconds) 43 A1 --- DE- Declination J2000 (sign) 44- 45 I2 deg DEd Declination J2000 (degrees) 47- 48 I2 arcmin DEm Declination J2000 (minutes) 50- 54 F5.2 arcsec DEs Declination J2000 (seconds) 56- 58 I3 --- S/N Signal to Noise ratio 60- 64 F5.3 mJy F14.3um 14.3µm flux 66- 69 F4.2 mJy e_F14.3um 14.3µm flux error 71- 74 F4.2 mJy F1.4GHz ? 1.4GHz flux 76 I1 --- S/G [0/1] star (=1) or galaxy (=0) 78- 81 F4.2 --- Rel ? Reliability of the optical candidate (1) 83- 87 F5.2 mag r'mag ? r' Sloan magnitude 88- 91 A4 --- n_r'mag [B.F. ] indicate a Blank Field. 93- 96 F4.2 arcsec D(IR-opt) ? Distance Infrared-Optical position
Note (1): likelihood ratio of the optical candidate. The reliability is computed by taking into account, if needed, the presence of other optical candidates for the corresponding ISO source.
Acknowledgements: Giulia Rodighiero References: Fadda et al., Paper I 2004A&A...427...23F, Cat. J/A+A/427/23
(End) Giulia Rodighiero [Padova, Italy], Patricia Vannier [CDS] 30-Jul-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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