| 3C273-20210118-S001-R001-B-042435.fts |
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| Only less than 50 stars was detected |
| 3C273-20210118-S001-R001-I-042828.fts |
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| Only less than 50 stars was detected |
| 3C273-20210118-S001-R001-R-042709.fts |
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| Only less than 50 stars was detected |
| 3C273-20210118-S001-R001-V-042553.fts |
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| Only less than 50 stars was detected |