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Table 1
Reference stars used for the relative photometry.
| Star No. | Identifier (2MASS) | K mag | |
|
|
|||
| 1 | J20142800+6506270 | 9.231 | |
| 2 | J20131440+6507000 | 10.560 | |
| 3 | J20142873+6507445 | 9.584 | |
| 4 | J20123648+6508138 | 9.254 | |
| 5 | J20141068+6511408 | 10.674 | |
| 6 | J20133795+6512408 | 10.643 | |
| 7 | J20140978+6512548 | 8.995 | |
| 8 | J20125213+6514365 | 9.347 | |
| 9 | J20135707+6515082 | 8.879 | |
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