Email to Arnold Rots, cc: ascds_help, arcops, ascds_dutysci, aspect_help:

From my examination of the raw ACA telemetry it appears that the monitor window
star in obs 5438 (R Aqr) was substantially brighter than the expected ~7.5
mags.  The center of the star is fully saturated and there is no usable monitor
data except that the star is probably brighter than ~3rd mag.  See:

 http://cxc.harvard.edu/mta/ASPECT/obs5438_saturated_star/

The ACA was only occasionally acquiring the star long enough to get image data,
and the rest of the time is spent searching.  This is a variant of the ACA
bounce problem.  Which brings the question of why it wasn't treated as such in
L0.  From a science standpoint I don't see a need to have all the slot 7 files
archived.  Any further investigation of this would proceed via engineering or
raw telemetry.

-Tom

On Wed, 2005-10-12 at 10:54, Arnold Rots wrote:
The monitor star for obsId 5438 seems rather pathological.
> It generated 271 adat71 files - of which 177 are ingested.
> It's pretty obvious why the remaining 94 did not get in, so I am
> plannig to force data distribution through.  But someone probably
> wants to take a look at this case.
> 
>   - Arnold
> 
> ---------------------------------------------------------
> Arnold H. Rots                             arots@head.cfa
> B 238 - MS 67                              HEAD - CXC
> 60 Garden Street                           Phone: 6-7701
> ---------------------------------------------------------
> 

Snapshot of ACA image telemetry