| 3C273-20210224-S001-R001-B-022139.fts |
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| Only less than 50 stars was detected |
| 3C273-20210224-S001-R001-I-022530.fts |
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| Only less than 50 stars was detected |
| 3C273-20210224-S001-R001-R-022413.fts |
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| Only less than 50 stars was detected |
| 3C273-20210224-S001-R001-V-022258.fts |
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| Only less than 50 stars was detected |