PSF Triangularity

Monday, October 8, 2012 1:50 PM

Problem(s) Encountered:

We noticed that after slewing the telescope, the PSF looks slightly triangular. The effect usually lasts a few seconds. While moving from dec -05:09 to dec +20:12 (HA between 0 and 1, airmass from 1.3 to 1) though, the effect was more persistent:  ~60 sec. We don''t know if this is expected, so we prefer to note it down.


Solutions:

Triangular PSF for a few seconds after slewing is probably due to the time it takes the airbags to rebalance the primary mirror support, i.e., it is to be expected.