1999A&A...342..363D


Query : 1999A&A...342..363D

1999A&A...342..363D - Astronomy and Astrophysics, volume 342, 363-377 (1999/2-2)

A classical approach to faint extragalactic source extraction from ISOCAM deep surveys. Application to the Hubble Deep Field.

DESERT F.-X., PUGET J.-L., CLEMENTS D.L., PERAULT M., ABERGEL A., BERNARD J.-P. and CESARSKY C.J.

Abstract (from CDS):

We have developed a general data reduction technique for ISOCAM data coming from various deep surveys of faint galaxies. In order to reach the fundamental limits of the camera (due to the background photon noise and the readout noise), we have devised several steps in the reduction processes that transform the raw data to a sky map which is then used for point source and sligthly extended source extraction. The main difficulties with ISOCAM data are the long-term glitches and transient effects which can lead to false source detections or large photometric inaccuracies. In many instances, redundancy is the only way towards clear source count statistics. A sky pixel must have been ``seen'' by many different CAM pixels. Our method is based on least-squares fits to temporal data streams in order to remove the various instrumental effects. Projection onto the sky of the result of a ``triple-beam method'' (ON-(OFF1+OFF2)/2) obtained from the signal of a given pixel during three consecutive raster positions leads to the removal of the low frequency noise. This is the classical approach when dealing with faint sources on top of a high background. We show illustrative examples of our present scheme by using data taken from the publicly available Hubble Deep Field ISOCAM survey in order to demonstrate its characteristics. More than thirty sources down to the 60 (resp. 100)µJy level are clearly detected above 4 σ at wavelengths of 7 (resp. 15) µm, the vast majority at 15µm. A large fraction of these sources can be identified with visible objects of median magnitude 22 and K-band magnitude of 17.5 and redshifts between 0.5 and 1 (when available). A few very red objects could be at larger redshifts.

Abstract Copyright:

Journal keyword(s): cosmology: observations - infrared: galaxies - galaxies: evolution - galaxies: photometry - galaxies: statistics - methods: data analysis

Nomenclature: Tables 1 to 5: [DPC99] HDF-N-LWN-NN = ISOHDF JHHMMSS.s+DDMMSS, N=4+2+18+15+23. Table 6: [DPC99] HDF-ALL-LW3-NN = ISOHDF JHHMMSS.s+DDMMSS N=41.

Simbad objects: 85

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Number of rows : 85
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ISOHDF J123638.4+621251 IR 12 35 38.4 +62 12 51           ~ 1 0
2 ISOHDF J123629.9+621158 IR 12 36 29.9 +62 11 58           ~ 1 0
3 ISOHDF J123630.6+621100 G 12 36 31.4 +62 11 15           ~ 4 0
4 ISOHDF J123633.1+621312 IR 12 36 33.1 +62 13 12           ~ 1 0
5 GOODS J123633.59+621320.2 G 12 36 33.62 +62 13 19.9 25.09 23.4983 23.65 21.78 21.5376 ~ 26 0
6 ISOHDF J123633.8+621203 IR 12 36 33.8 +62 12 03           ~ 1 0
7 ISOHDF J123633.9+621233 IR 12 36 33.9 +62 12 34           ~ 1 0
8 ISOHDF J123633.9+621403 IR 12 36 33.9 +62 14 03           ~ 2 0
9 MODS deep 1314 * 12 36 34.1503517760 +62 13 57.902490084 20.988 20.2084 19.9091 19.14 19.4602 ~ 9 0
10 ISOHDF J123634.2+621230 IR 12 36 34.2 +62 12 31           ~ 1 0
11 SDSS J123634.47+621213.2 EmG 12 36 34.474 +62 12 13.24 24.03 21.4534 21.551 18.84 19.1534 ~ 60 0
12 NAME SMM J123635+621237 EmG 12 36 34.52 +62 12 41.0 25.26 23.8632 24.53 23.18 22.7131 ~ 111 0
13 GOODS J123634.96+621224.5 G 12 36 34.97 +62 12 24.4 24.62 22.2186 22.382 19.63 19.7072 ~ 25 0
14 ISOHDF J123636.2+621339 G 12 36 36.1359 +62 13 39.030   26.1639 25.76   24.4749 ~ 6 0
15 ISOHDF J123636.3+621203 IR 12 36 36.3 +62 12 03           ~ 1 0
16 ISOHDF J123636.3+621222 IR 12 36 36.3 +62 12 22           ~ 1 0
17 ISOHDF J123636.4+621123 IR 12 36 36.4 +62 11 23           ~ 1 0
18 ISOHDF J123636.5+621341 IR 12 36 36.5 +62 13 41           ~ 1 0
19 SDSS J123636.62+621346.8 Sy1 12 36 36.621 +62 13 46.80 22.84 22.5698 21.953 20.32 21.4190 ~ 41 0
20 GOODS J123636.80+621213.5 G 12 36 36.74 +62 12 13.6 25.21 22.5776 23.67 20.86 20.5979 ~ 22 0
21 ISOHDF J123636.8+621210 IR 12 36 36.8 +62 12 11           ~ 1 0
22 CXOHDFN J123637.1+621135 EmG 12 36 36.8615 +62 11 35.176 21.76 18.8662 20.7111 17.66 18.0676 ~ 44 0
23 ISOHDF J123637.3+621130 IR 12 36 37.3 +62 11 31           ~ 1 0
24 ISOHDF J123637.9+621104 IR 12 36 37.9 +62 11 04           ~ 1 0
25 ISOHDF J123637.9+621141 IR 12 36 37.9 +62 11 41           ~ 1 0
26 CXOHDFN J123637.9+621116 G 12 36 38.06 +62 11 17.1 23.12 23.7335   22.20 23.0319 ~ 21 0
27 GOODS J123638.29+621151.2 G 12 36 38.33 +62 11 50.9 24.84 24.7914 24.45 22.74 22.4093 ~ 23 0
28 GOODS J123638.86+621257.6 G 12 36 38.90 +62 12 57.0 23.55 23.4929 24.39 22.28 22.1307 ~ 24 0
29 ISOHDF J123639.0+621422 IR 12 36 39.0 +62 14 22           ~ 1 0
30 ISOHDF J123639.2+621423 IR 12 36 39.2 +62 14 23           ~ 1 0
31 ISOHDF J123639.4+621244 IR 12 36 39.4 +62 12 44           ~ 1 0
32 [GOS97] J123639.3+621250 G 12 36 39.40 +62 12 50.4     23.2     ~ 6 0
33 ISOHDF J123639.6+621242 IR 12 36 39.6 +62 12 43           ~ 1 0
34 ISOHDF J123640.7+621041 IR 12 36 40.8 +62 10 48           ~ 2 0
35 ISOHDF J123641.1+621121 IR 12 36 41.1 +62 11 21           ~ 1 0
36 PEARS n41339 EmG 12 36 41.82 +62 11 32.3 22.92 20.4568 21.562 20.3 19.7796 ~ 51 0
37 CXO J123642.2+621545 Sy2 12 36 42.23 +62 15 45.5 24.57 23.7774 24.15 21.61 21.3766 ~ 54 0
38 ISOHDF J123642.7+621302 IR 12 36 42.7 +62 13 03           ~ 1 0
39 ISOHDF J123642.9+621208 IR 12 36 42.9 +62 12 08           ~ 1 0
40 ISOHDF J123643.9+621244 IR 12 36 43.9 +62 12 44           ~ 1 0
41 CXOHDFN J123644.0+621250 EmG 12 36 43.98 +62 12 50.0 23.18 22.6029 22.821 20.84 21.0192 ~ 61 0
42 NAME SMM J123646.1+621449 AGN 12 36 44.03 +62 14 50.6 25.38 25.3082 25.48 24.25 24.2135 ~ 59 0
43 ISOHDF J123646.4+621530 G 12 36 45.985 +62 15 28.68     24.6     ~ 8 0
44 ISOHDF J123646.1+621135 IR 12 36 46.1 +62 11 35           ~ 1 0
45 ISOHDF J123646.2+621131 IR 12 36 46.2 +62 11 32           ~ 1 0
46 [TSW99] 198.000 EmG 12 36 46.27 +62 11 42.0 22.87 22.8013 23.94 21.52 21.4006 ~ 47 0
47 SDSS J123646.31+621404.6 Sy1 12 36 46.35 +62 14 04.7 24.58 23.8730 23.174 21.69 21.5709 ~ 106 0
48 ISOHDF J123646.5+621448 IR 12 36 46.5 +62 14 48           ~ 1 0
49 ISOHDF J123646.6+621039 IR 12 36 46.6 +62 10 40           ~ 1 0
50 ISOHDF J123646.8+621048 IR 12 36 47.05 +62 10 45.4           ~ 5 0
51 ISOHDF J123648.3+621426 IR 12 36 48.19 +62 14 32.1     19.5     ~ 9 0
52 CXOHDFN J123649.5+621345 G 12 36 49.4254846344 +62 13 46.926527304 22.090 20.1403 19.7508 17.97 18.2622 ~ 45 0
53 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1873 1
54 Cowie 22 G 12 36 49.51 +62 14 06.9 24.66 23.6237 23.50 21.95 21.8989 ~ 51 0
55 ISOHDF J123649.7+621313 IR 12 36 49.7 +62 13 13           ~ 1 0
56 NAME SMM J123650+621316 EmG 12 36 49.74 +62 13 13.0 25.47 23.7701 23.48 21.46 21.6273 ~ 87 1
57 ISOHDF J123649.8+621311 IR 12 36 49.8 +62 13 12           ~ 1 0
58 ISOHDF J123649.9+621312 IR 12 36 49.9 +62 13 12           ~ 1 0
59 ISOHDF J123651.1+621024 IR 12 36 51.1 +62 10 24           ~ 1 0
60 ISOHDF J123651.1+621317 IR 12 36 51.1 +62 13 17           ~ 1 0
61 CXOHDFN J123651.1+621031 EmG 12 36 51.13 +62 10 30.8 24.61 22.7105 22.346 20.23 20.3643 ~ 57 0
62 ISOHDF J123651.2+621314 IR 12 36 51.2 +62 13 15           ~ 1 0
63 Cowie 10 G 12 36 51.80 +62 13 53.7 24.63 23.1740 22.974 21.08 21.2076 ~ 47 0
64 ISOHDF J123652.3+621314 IR 12 36 52.3 +62 13 15           ~ 1 0
65 ISOHDF J123652.9+621111 IR 12 36 52.9 +62 11 11           ~ 1 0
66 ISOHDF J123653.2+621109 IR 12 36 53.2 +62 11 09           ~ 1 0
67 NAME SMM J123653+621119 AGN 12 36 53.27 +62 11 16.7 25.34 23.6391 24.17 22.08 21.7685 ~ 31 0
68 ISOHDF J123653.3+621133 IR 12 36 53.3 +62 11 33           ~ 1 0
69 ISOHDF J123653.3+621135 IR 12 36 53.3 +62 11 35           ~ 1 0
70 CXO J123653.3+621139 EmG 12 36 53.38 +62 11 39.6 24.11 23.4368 23.69 22.93 22.6310 ~ 62 0
71 ISOHDF J123653.6+621250 IR 12 36 53.6 +62 12 51           ~ 1 0
72 ISOHDF J123653.8+621250 IR 12 36 53.8 +62 12 50           ~ 1 0
73 Cowie 7 G 12 36 53.8929 +62 12 54.395 24.53 22.9664 22.995 20.95 20.9765 ~ 41 0
74 [CBH2004] 189.249649+62.24730 IG 12 36 59.94 +62 14 49.9 24.84 23.5162 23.42 21.62 21.5824 ~ 40 0
75 CXOHDFN J123702.0+621122 EmG 12 37 01.99 +62 11 22.6 21.06 20.1641 21.570 18.72 19.0122 ~ 34 0
76 ISOHDF J123702.5+621404 IR 12 37 02.5 +62 14 04           ~ 1 0
77 CXOHDFN J123702.8+621401 EmG 12 37 02.76 +62 14 01.7 24.27 24.0868 24.61 22.60 22.5937 ~ 30 0
78 ISOHDF J123703.1+621401 IR 12 37 03.1 +62 14 01           ~ 1 0
79 CXOHDFN J123704.6+621429 EmG 12 37 04.66 +62 14 29.2 24.94 23.3143 23.029 20.96 21.0392 ~ 32 0
80 ISOHDF J123704.9+621431 IR 12 37 04.9 +62 14 31           ~ 1 0
81 CXOHDFN J123705.8+621153 EmG 12 37 05.86 +62 11 53.7 24.81 22.9008 23.393 21.22 21.0346 ~ 45 0
82 ISOHDF J123708.3+621053 IR 12 37 08.3 +62 10 53           ~ 1 0
83 GOODS J123708.34+621252.9 G 12 37 08.3399 +62 12 52.930 23.54 23.4341 24.09 22.20 22.0794 ~ 20 0
84 GOODS J123709.52+621233.5 * 12 37 09.5221458480 +62 12 33.094226412 18.1508 17.2134 16.8124 14.69 15.8470 ~ 8 0
85 ISOHDF J123635.3+621422 G 23 36 35.6 +62 14 24     23.9     ~ 6 0

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2022.05.22-01:31:23

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