ISOCAM observations of the very deep IRAS 60 micron sample in the NEP region - I. The data

H. Aussel; D. Coia; P. Mazzei; G. De Zotti; A. Franceschini

doi:10.1051/aas:2000318

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Volume 141 / No 2 (January II 2000)

Astron. Astrophys. Suppl. Ser., 141 2 (2000) 257-283

Abstract

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Issue		Astron. Astrophys. Suppl. Ser. Volume 141, Number 2, January II 2000


Page(s)		257 - 283
DOI		https://doi.org/10.1051/aas:2000318
Published online		15 January 2000

Astron. Astrophys. Suppl. Ser. 141, 257-283 (2000)

ISOCAM observations of the very deep IRAS 60 micron sample in the NEP region^*

I. The data

H. Aussel¹, D. Coia², P. Mazzei¹, G. De Zotti¹ and A. Franceschini²

¹ Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy
² Dipartimento di Astronomia dell'Università di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy

Send offprint request to: G. De Zotti, e-mail: dezotti@pd.astro.it

Received: 10 September 1999
Accepted: 26 October 1999

Abstract

 We present the results of ISO observations with the CAM LW3 filter, centered at $\lambda_{\rm eff} = 14.3\,\mu$ m, of 94 out of the 98 galaxies comprising the complete $60\,\mu$ m IRAS deep survey (IDS) sample in the north ecliptic polar region. In addition, we observed a source detected by IRAS at $25\,\mu$ m and found to have particularly interesting properties. Altogether, 106 sources were detected with a signal to noise ratio $\geq 3$ and 69 with $S/N\geq 5$ in the $3.2'\times 3.2'$ fields centered on the nominal positions of IRAS sources. Sixty-five $\geq 3\sigma$ detections (49 of which at $\geq 5\sigma$ ) are likely identifications of IRAS sources. Ten additional IRAS sources have possible $\geq 3\sigma$ ISOCAM counterparts. In 6 further cases, signals at the $2-3\sigma$ 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 $\geq 5\sigma$ , with $S(14.3~\mu{\rm m}) \geq 3.5$ mJy. The corresponding areal density is consistent with that found in previous surveys. Finding charts for all observed fields are given. 

Key words: surveys / galaxies: photometry / galaxies: starburst / infrared: galaxies

^*

Based on observations with the Infrared Space Observatory (ISO). ISO is an ESA project with instruments funded by ESA Member States (especially by the PI countries: France, Germany, The Netherlands and the United Kingdom) and with participation of ISAS and NASA.

ISOCAM observations of the very deep IRAS 60 micron sample in the NEP region*

I. The data

ISOCAM observations of the very deep IRAS 60 micron sample in the NEP region^*