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| Status: observations complete Data link: not yet available Assessment: under way |
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| Mode: | Low-background Imaging | ||
| Additional instrument verification: | Test NIRI image quality using the on-instrument wavefront sensor. Check for flexure between the science and OIWFS sides of the NIRI instrument. | ||
| Telescope verification: | Undithered observations used to test OIWFS guiding. | ||
| Proposed observing sequence: | Continuous 120 sec f/14 J-band observations on a star field over several hours. Guide with OIWFS, but don't offset the telescope. No dithering. | ||
| OT program file: | not available | ||
| Science background: | M13 is a nice globular cluster chosen to make finding an OIWFS guide star easy. There are lots of stars to compute the centroid from image to image. | ||
| Target(s): | |||
| Object | approx. RA (2000) | approx. dec (2000) | |
| M13 | 16h 42m | 36d 27m | |
| Observing conditions: | image quality: 50%-ile (0.65 arcsec at J) sky transparency (clouds): 50%-ile (photometric) sky transparency (water vapour): Any sky background: 80%-ile max air mass: 2.0 |
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| Observing time achieved: | Approx. 4 hr on-source at J. | ||
| Data release date: | End of August, 2001 | ||
| SV team member(s) responsible for assessment: | Joe Jensen, Doug Simons | ||
Last update August 20, 2001; Joe Jensen