Observing notes - March 2005 2SLAQ run

Observers: SHARP, DE PROPRIS, COUCH, CHIU, BLAND HAWTHORN

Nightly updates | Observing summary | Run summary

Nightly updates

11/03-12/03 log diary: Lost 1h to system failure

12/03-13/03 log diary: Some cloud; 45 min lost

13/03-14/03 log diary: Lost 15m to system failure

14/03-15/03 log diary: Some cloud for last field

15/03-16/03 log diary: 2.5 hours lost to cloud & other problems. Some contamination by fluorescents for one field.

Nightly updates | Observing summary | Run summary

Observing summary

Date   Field  Exposure Seeing   Comments

050311 a13    4x1800s  1.8 
050311 b09    3x1800s  2.2   Some extra flats to get headers right     
050311 d04    3x1800s  2.5
050311 d15    3x1800s  3.0

050312 a13    1x1377s+2x1800s First frame in twilight, some cloud  
050312 b09    4x1800s  1.8
050312 d04    4x1800s  1.8   Cloud during exps 2+3
050312 d15    4x1800s  1.8

050313 a13    2x1800s  2.5
050313 a16    4x1800s  1.8
050313 b11    4x1800s  1.8
050313 d13    4x1800s  2.0
051313 d17    2x1800s  2.4

050314 a16    4x1800s  1.8
050314 b11    4x1800s  1.8
050314 d13    4x1800s  1.8
050314 d17    5x1800s  1.8   Some cloud

050315 a13    1x1800s  1.8   Cloud, one poor exp only
050315 b09    4x1800s  1.8   Dome fluorescent contamination
050315 d04    3x1800s  1.8
050315 d17    5x1800s  1.8   Last two through cloud

Nightly updates | Observing summary | Run summary

Run summary

 
Field completeness 
Field  | date   | LRGs | QSO |  Comments
a13    | 050313 | 83%  | 80% |  86% LRGs for original 172 targets
a16    | 050314 | 97%  | 83% |
b09    | 050315 | 92%  | xx% |
b11    | 050314 | 96%  | 82% |
d04    | 050315 | 96%  | 82% |
d13    | 050314 | 92%  | 86% |
d15    | 050312 | 89%  | 81% |
d17    | 050315 | 96%  | 80% |

This was one of our most successful runs, with 8 completed fields
(>85% LRG redshifts, >80% QSO IDs) in 5 nights.  1592 LRG candidates
were observed, an average of 199 per field, yielding a total of 1473
reliable redshifts (including stars and some repeats) and an overall
success rate of 92.5%.  The QSO identifications were at 82% overall
(with one field still to be analysed).

[Notes compiled by RDC after the run]