| 3C273-20210427-S001-R001-B-232315.fts |
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| Only less than 50 stars was detected |
| 3C273-20210427-S001-R001-I-232714.fts |
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| Only less than 50 stars was detected |
| 3C273-20210427-S001-R001-R-232558.fts |
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| Only less than 50 stars was detected |
| 3C273-20210427-S001-R001-V-232442.fts |
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| Only less than 50 stars was detected |