Table 1
Cross-entropy fit parameters.
| Cluster | α | δ | xc | yc | Radius | Vcut | Fstar | 3σphot | Pcut | Jcut | Fstar | Pcut | REF |
| J2000.0 | J2000.0 | pix | pix | arcmin | mag | (%) | (%) | (%) | mag | (%) | (%) | ||
|
|
|||||||||||||
| NGC 2477 | 07 52 10 | –38 31 48 | –40.97 | –160.82 | 15 | 18.25 | 50 | 1.0 | 5 | 15.75 | 99 | 10 | 152 |
| NGC 7044 | 21 13 09 | +42 29 42 | 13.27 | 31.35 | 06 | − | 99 | 1.0 | 5 | – | 99 | – | 62 |
| NGC 2266 | 06 43 19 | +26 58 12 | –13.60 | –2.54 | 05 | − | 99 | 1.0 | 5 | – | 99 | 10 | 41 |
| Berkeley 32 | 06 58 06 | +06 26 00 | 734.22 | 662.30 | 06 | − | 99 | 1.0 | − | – | 99 | 1.5 | 40 |
| NGC 2682 | 08 51 18 | +11 48 00 | 0.69 | –0.78 | 25 | − | 99 | 1.0 | 5 | – | 99 | 30 | 335 |
| –0.22 | –0.83 | − | 50 | 1.5 | − | – | 99 | – | 31 | ||||
| –0.02 | –1.61 | − | 50 | 1.5 | 5 | – | 99 | – | 54 | ||||
| NGC 2506 | 08 00 01 | –10 46 12 | –9.21 | –16.21 | 12 | − | 99 | 1.0 | 30 | – | 99 | 5 | 284 |
| –10.85 | –8.30 | 17.75 | 99 | 1.5 | 5 | 15.25 | 99 | 5 | 163 | ||||
| NGC 2355 | 07 16 59 | +13 45 00 | 0.00 | 0.00 | 07 | 16.20 | 99 | 1.5 | 20 | 15.25 | 99 | 5 | 217 |
| 14.13 | –6.42 | 16.75 | 99 | 1.5 | 5 | 15.25 | 99 | 44 | |||||
| Melotte 105 | 11 19 42 | –63 29 00 | –18.85 | –32.82 | 05 | − | 99 | 1.5 | 10 | 14.75 | 99 | 5 | 289 |
| 11.18 | –34.34 | 03 | 16.75 | 99 | 1.5 | 15 | 14.75 | 99 | – | 32 | |||
| Trumpler 1 | 01 35 42 | +61 17 00 | 1.54 | –2.04 | 17.75 | 99 | 1.5 | 5 | – | 50 | – | 320 | |
| –19.05 | 0.68 | 17.75 | 99 | 1.0 | − | – | 99 | – | 86 | ||||
| Dias 6 | 18 30 30 | –12 18 59 | 550.17 | 480.12 | 06 | − | 99 | 1.0 | − | – | 99 | 30 | 152 |
Notes. The first four columns (after the cluster identification) give the central coordinates and radius from DAML02 catalog, followed by the X, Y central position used, then the fit parameters used considering UBV data from the literature and using 2MASS data. The parameter Vcut is the adopted cut-off in magnitude in V, binarity is the number of stars considered as binary, 3σphot the photometric error as described in the text, and Pcut the adopted cut-off in a normalized fashion. Columns 11–13 present the same for 2MASS analysis. REF are the reference numbers (as defined in the WEBDA catalog) for the clusters studied. Only for NGC 2506 do we set the stars outside a radius of 130 pixels to zero weight.
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