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| Status: observations complete Data link: not yet available Assessment: under way |
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| Mode: | Wide-field Imaging | ||
| Additional instrument verification: | Test NIRI flexure in wide-field imaging mode. Check to see if steering mirror motion is continuous or sporadic in a real-world observing situation. | ||
| Telescope verification: | Check image quality on NIRI while guiding with P2 off-axis. | ||
| Proposed observing sequence: | Continuous 120 sec f/6 J-band observations on a quasar field over several hours. Guide with P2, and don't offset the telescope. No dithering. | ||
| OT program file: | available | ||
| Science background: | Quasar Q1331+170 chosen as a good target for an extended, undithered observation. It is bright enough to centroid on for the purpose of detecting image motion. The total of ~3.5 hours integration might reveal faint companion galaxies. A Lyman-alpha absorption system is seen in the quasar spectrum. | ||
| Target(s): | |||
| Object | approx. RA (2000) | approx. dec (2000) | |
| Q1331+170 | 13h 33m | 16d 49m | |
| Observing conditions: | image quality: 50%-ile (0.6 arcsec at J) sky transparency (clouds): 80%-ile (some cirrus) sky transparency (water vapour): Any sky background: 80%-ile max air mass: 2.0 |
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| Observing time achieved: | Approx. 3.5 hr on-source, undithered | ||
| Data release date: | End of August, 2001 | ||
| SV team member(s) responsible for assessment: | Kathy Roth, Joe Jensen | ||
Last update August 20, 2001; Joe Jensen