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Table 2
Number of selected objects after each selection criterion.
| Selection criterion | Number of | Number of | RCB stars |
| WISE objects | known RCBs | eliminated | |
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| 0: Located in WISE-PDR1 sky area | 52 | ||
| 1: Catalogued by WISE | 257 310 278 | 50 | OGLE-GC-RCB-1 & -2 |
| Catalogued in the [22] band | 12 192 351 | 50 | |
| 2: Catalogued in all four WISE bands | 9 636 678 | 49 | RY Sgr |
| 3: Catalogued in all three 2MASS bands | 6 832 051 | 49 | |
| 4: Cut on ([4.6] − [12] vs. [12] − [22]) | 337 359 | 47 | DY Cen and MV Sgr |
| 5: Cut on (J − H vs. H − K) | 9660 | 45 | Y Mus and XX Cam |
| 6: Cut on ([4.6] − [12] vs. [12] − [22]) | 4146 | 42 | EROS2-RCB-CG-3 & -5 and SV Sge |
| 7: Cut on (K vs. J − K) | 3058 | 42 | |
| 8: Cut on (J − K vs. J − [12]) | 1643 | 40 | EROS2-RCB-CG-12 and MACHO-308-38099.66 |
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| Final (without the known RCBs + HD 175893) | 1602 | – | |
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