Observations of the Hubble Deep Field with the Infrared Space Observatory - II. Source detection and photometry

Goldschmidt, P.; Oliver, S. J.; Serjeant, S. B. G.; Baker, A.; Eaton, N.; Efstathiou, A.; Gruppioni, C.; Mann, R. G.; Mobasher, B.; Rowan-Robinson, M.; Sumner, T. J.; Danese, L.; Elbaz, D.; Franceschini, A.; Egami, E.; Kontizas, M.; Lawrence, A.; McMahon, R.; Norgaard-Nielsen, H. U.; Perez-Fournon, I. and Gonzalez-Serrano, J. I. (1997). Observations of the Hubble Deep Field with the Infrared Space Observatory - II. Source detection and photometry. Monthly Notices of the Royal Astronomical Society, 289(2) pp. 465–470.

DOI: https://doi.org/10.1093/mnras/289.2.465

URL: http://dx.doi.org/10.1093/mnras/289.2.465

Abstract

We present positions and fluxes of point sources found in the Infrared Space Observatory (ISO) images of the Hubble Deep Field (HDF) at 6.7 and 15 μrn. We have constructed algorithmically selected ‘complete’ flux-limited samples of 19 sources in the 15-μm image, and seven sources in the 6.7-μm image. The typical flux limit at 15 μrn is <0.2 mJy and at 6.7 μrn is ∼0.04 mJy. We have selected ‘supplementary’ samples of three sources at 15 μurn and 20 sources at 6.7 μm by eye. We discuss the completeness and reliability of the connected pixel source detection algorithm used, by comparing the intrinsic and estimated properties of simulated data, and also by estimating the noise properties of the real data. The most pessimistic estimate of the number of spurious sources in the ‘complete’ samples is one at 15 μrn and two at 6.7 μrn, and in the ‘supplementary’ lists is one at 15 μrn and five at 6.7 μ.m.

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