>From Thu May 7 10:15:55 1998 >Received: from astro.princeton.edu (astro.Princeton.EDU [204.153.49.45]) by sdssdp1.fnal.gov (950413.SGI.8.6.12/950213.SGI.AUTOCF) via ESMTP id KAA25838 for <heidi@sdssdp1.fnal.gov>; Thu, 7 May 1998 10:15:54 -0500 >Received: from localhost (localhost) > by astro.princeton.edu (8.8.5/8.8.5) with internal id LAA23361; > Thu, 7 May 1998 11:11:13 -0400 (EDT) >Date: Thu, 7 May 1998 11:11:13 -0400 (EDT) >From: Mail Delivery Subsystem <MAILER-DAEMON@astro.Princeton.EDU> >Message-Id: <199805071511.LAA23361@astro.princeton.edu> >To: <heidi> >Subject: Returned mail: unknown mailer error 1 >Auto-Submitted: auto-generated (failure) > >The original message was received at Thu, 7 May 1998 11:10:35 -0400 (EDT) >from sdssdp1.fnal.gov [131.225.7.142] > > ----- The following addresses had permanent fatal errors ----- >"|/u/dssadmin/mailer/bin/mailer sdss-mt" > (expanded from: <sdss-mt@astro.PRINCETON.EDU>) > > ----- Transcript of session follows ----- >sh: /u/dssadmin/mailer/bin/mailer: cannot execute >554 "|/u/dssadmin/mailer/bin/mailer sdss-mt"... unknown mailer error 1 > > ----- Original message follows ----- > >Return-Path: <heidi@sdssdp1.fnal.gov> >Received: from sdssdp1.fnal.gov (sdssdp1.fnal.gov [131.225.7.142]) > by astro.princeton.edu (8.8.5/8.8.5) with SMTP id LAA23323 > for <sdss-mt@astro.PRINCETON.EDU>; Thu, 7 May 1998 11:10:35 -0400 (EDT) >Received: (from heidi@localhost) by sdssdp1.fnal.gov (950413.SGI.8.6.12/950213.SGI.AUTOCF) id KAA25829 for sdss-mt@astro.Princeton.EDU; Thu, 7 May 1998 10:10:17 -0500 >Date: Thu, 7 May 1998 10:10:17 -0500 >From: heidi@sdssdp1.fnal.gov (Heidi Newberg) >Message-Id: <199805071510.KAA25829@sdssdp1.fnal.gov> >To: sdss-mt@astro.Princeton.EDU >Subject: looking at mt images > > > Yesterday I started looking at MT images from mjd50935. >Half of the images were so far out of focus that the stars were >doughnuts in the images. It did not appear that this was due to >a change in the weather conditions at the site (though that may >have contributed to the problem). It was common for the focus >to be way out, then reasonably in focus for the next couple of >fields, and then way out for the next couple of fields, etc. The >goodness of focus changed most when the telescope was slewed the >most. After staring at the data for a while, I decided it was >likely that the altitude focus correction was not correct. > > I tried to read the MOP tcl code. It seems to me that the >focus correction formula is something like: > >adjustment = 2.5 (90 - elevation in degrees) - 1.5, > >but this might not be right, if I don't understand how all of the >shells talk to each other. This equation looks sort of funny to >me. Who is the right person to talk to about this problem? Has >this been noticed on other days? > > -Heidi > APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 5 in the apo-monitor archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo-monitor/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo-monitor@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO