| 3C273-20200119-S001-R001-B-042740.fts |
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| Only less than 50 stars was detected |
| 3C273-20200119-S001-R001-I-043137.fts |
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| Only less than 50 stars was detected |
| 3C273-20200119-S001-R001-R-043020.fts |
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| Only less than 50 stars was detected |
| 3C273-20200119-S001-R001-V-042900.fts |
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| Only less than 50 stars was detected |