| 3C273-20210222-S001-R001-B-020745.fts |
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| Only less than 50 stars was detected |
| 3C273-20210222-S001-R001-I-021139.fts |
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| Only less than 50 stars was detected |
| 3C273-20210222-S001-R001-R-021022.fts |
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| Only less than 50 stars was detected |
| 3C273-20210222-S001-R001-V-020904.fts |
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| Only less than 50 stars was detected |