67A0618B.html |
RA Range:13hrs
Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 1.0" 2CLR 1.7 0.4 90
| Pre-imaging run? |
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Chilean run? |
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Special calibrations? |
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| Time critical? |
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ToO? |
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Carry-over run? |
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This is MXU spectroscopy using pre-imaging of the galaxy cluster A1689 taken on April 1st with FORS2. Note that only 1 mask is being observed here, and all the OB's are just repeat exposures of the same field, so the overhead should be small. The targets are very faint high-z candidates and will not be visible in through slit image unless they have emission lines (in the red). Reference stars should be visible in the through slit exposure, and not all are likely to be stars, some may be compact galaxies.
README of this run: