Date: Tue, 19 Apr 2011 16:19:04 -0400
Subject: Re: [sdss3-25mlog 94] Addendum: 2.5m obslog 20110418 (MJD 55670)
From: Michael Blanton
As a note for the record (Craig already knows this):
> Basic refraction corrections based on the new platelist
> plateGuideOffsets files were tested using plate 4671. We didn't get
> running until the plate was > 2 hours over, so the only useful and
> unambiguous note is that for for 1.6um and increasing HA the guider
> moved the guide stars West in the probes. From the diagnostic
> platelist plots I _think_ that's right. We'll run that plate again
> this evening and get better boss spectra to check the net effect.
The correct direction at + HA is to move the stars
East in the guide probe, for this plate guiding at 1.6um.
Thanks,
Mike
--
Michael Blanton
Assistant Professor
Department of Physics
New York University
212-998-7770