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

We present the results of ISO observations with the CAM LW3 filter, centered at lambda(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 greater than or equal to 3 and 69 with S/N greater than or equal to 5 in the 3.2' x 3.2' fields centered on the nominal positions of IRAS sources. Sixty-five greater than or equal to 3 sigma detections (49 of which at greater than or equal to 5 sigma) are likely identifications of IRAS sources. Ten additional IRAS sources have possible greater than or equal to 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 greater than or equal to 5 sigma, with S(14.3 mu m) greater than or equal to 3.5 mJy. The corresponding areal density is consistent with that found in previous surveys. Finding charts for all observed fields are given.