| DDT |
Last update of this page: Wed Oct 7 15:41:04 2009
Run State: COMPLETED
USD review status:
O.K.!
| Pre-Imaging? | Special-Calibration? | Time-Critical? | ToO/GTO/Large program? | Carry-Over? | |
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Special Remarks:
NO REMARKS
Abstract for MTS:
Several things are not completely perfect about this run, but it is a DDT and
seems to be in need of haste, so I will pass it now with some comments, and then
try to get the issued solved afterwards.
The OB names state that they are "ToOs" which is not really true, but it should
not prevent the OBs from being executatble. If this is a problem then we can
arrange to have the OBs re-named.
Here I copy the comments from Olivier on the sequencing of the execution of
those OBs:
Imaging: ob *_img_night1 and -night2
all ok. Simple point and shoot with at least 7 days between.
Spectro:
The angle of motion of the object is known with ~infinite precision from the ephemerides (and is listed in the eph. provided by PI). As he states, Rot = -PA =~ +60deg; the accurate value is in the eph.
The sequence should be:
- image 1: ob *PRE_prefix_:
set the Rot = -PA
shoot
keep the image
- wait some times,at least 1/2h so that the motion makes the target visible. Target moves 3.6"/h, so if acquisition is taken right after image 1, the motion will be negligible, and it will not be possible to identify the object: there are *many* mag=20.9 sources... Only one will move it you give it enough time. So: wait >=1/2h (short OB for another prg...).
- spectrum: _spec_
set the rot = -PA
shoot acqu
compare acquisition image (align and blink) with image 1
find the moving object
center it
(I'd recommend to iterate the acq image to check...)
shoot spectro
Just for completeness: the object will trail along the slit, about 0.6" per spectrum. This is absolutely fine. This also implies that the non-sidereal guiding rates should NOT be applied (as opposed to many solar system programs). Anyway, they are not given in the eph.
Note the statement in the README about the full moon period.
README of this run:
Web version of approved README readme_76504201.html