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Table 4
Main parameters of the clusters of IRAC sources.
| Designation | Approx. peak position | Number | Mean surface | Size | |||||
| RA(2000) | Dec(2000) | of sourcesc | density | ||||||
| (h) | (m) | (s) | (°) | (′) | (′′) | (stars pc-2) | (arcmin × arcmin) | ||
|
|
|||||||||
| Pis24 core | 17 | 24 | 43 | − 34 | 12 | 05 | 120 ± 16 | 98 | 2 × 2 |
| Pis24Na | 17 | 24 | 49 | − 34 | 10 | 19 | 37 ± 10 | 76 | 0.5 × 2 |
| Pis24S | 17 | 24 | 48 | − 34 | 14 | 17 | 137 ± 19 | 70 | 3 × 4 |
| Pis24Ea | 17 | 24 | 54 | − 34 | 12 | 28 | 42 ± 11 | 57 | 2 × 1 |
| Pis24Wb | 17 | 24 | 32 | − 34 | 13 | 16 | 23 ± 7 | 94 | 1 × 1 |
| Pis24 (global) | 359 ± 30 | 77 | 6 × 10 | ||||||
| Acore | 17 | 25 | 33 | − 34 | 23 | 41 | 134 ± 17 | 91 | 2 × 4 |
| AS | 17 | 25 | 31 | − 34 | 25 | 57 | 38 ± 10 | 78 | 1 × 2 |
| AE | 17 | 25 | 45 | − 34 | 25 | 22 | 55 ± 12 | 75 | 1 × 2 |
| AWa | 17 | 25 | 25 | − 34 | 22 | 51 | 35 ± 10 | 72 | 1 × 1 |
| A (global) | 262 ± 25 | 82 | 5 × 5 | ||||||
| BN | 17 | 26 | 03 | − 34 | 16 | 21 | 119 ± 17 | 81 | 2 × 3 |
| BSa | 17 | 26 | 07 | − 34 | 19 | 08 | 78 ± 15 | 64 | 2 × 1 |
| B (global) | 197 ± 23 | 73 | 2 × 5 | ||||||
Notes.Surface densities are calculated for a distance of 1.7 kpc.
(b)
coinciding with VVV CL164 of Lima et al. (2014), possibly a much older cluster unrelated with NGC 6357;
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