Date: Tue, 6 Mar 2012 14:50:53 -0800
From: Constance Rockosi
Subject: Re: [sdss3-25mlog 544] Re: (MJD 55990) guider problem on gimg-1131
That would be useful, but I was thinking about lower-level cries
for help from the guider itself and not the processing software.
--Connie
On Tue, Mar 06, 2012 at 05:34:07PM -0500, paul harding wrote:
> Connie,
> There will have been message in the STUI log for each star/fiber that could not be used.
> There should have been messages that stars were too faint to use...
>
> I have to go look at the code to see what the tests are and what should have been reported
> and look in the log to see what was reported.
>
> Paul
>
> On Mar 6, 2012, at 5:15 PM, Constance Rockosi wrote:
>
> >
> > Do we get any error messages from the guide camera that suggests it
> > knew it had lost its place in the readout or otherwise had trouble
> > with this frame?
> >
> > --connie
> >
> > On Tue, Mar 06, 2012 at 03:59:51PM -0500, paul harding wrote:
> >> This appears to have been a "one-off"  case where the image on the CCD was read incorrectly
> >> by the guide camera. Everything is smeared diagonally by 45deg and wrapped as though
> >> the number of pixels per row was off by a factor of 2.
> >>
> >> The guider should not have made any guiding corrections on this image because the
> >> guide fibers were not in the correct location on the image, and thus there was mostly noise
> >> to guide on in the regions that were extracted as guide fibers.
> >> Only one fiber aperture happened to land where there happened to be light.
> >>
> >> The previous and following images are all ok
> >>
> >> Paul
> >>
> >> Attached is the image of the extracted fibers.
> >>
> >>
> >>
> >
> >
> >>
> >> On Mar 4, 2012, at 8:28 PM, Viktor Malanushenko wrote:
> >>
> >>>> Cart 03, 5593-A, APOGEE & MARVELS, GSOGTF, sky photometric, seeing = 1.5"
> >>>>
> >>>> 07:55:28  apogee.expose=apRaw-04280063, 47, A, Object
> >>>> 08:03:51  apogee.expose=apRaw-04280064, 47, B, Object
> >>>
> >>> At 08:05 UT  we received a very unusual guider exposure
> >>> /data/gcam/55990/gimg-1131.fits
> >>> After exposure guider calculated extremely large
> >>> scale change and other parameters.
> >>>
> >>> Below I have attached skrinshort three consecutive images (gimg-1130, gimg-1131, gimg-1132),
> >>> and a copy of the log.
> >>>
> >>> During this time period, both the observer is not touched a computer keyboard.
> >>>
> >>>> 08:12:12  apogee.expose=apRaw-04280065, 47, B, Object
> >>>> 08:20:40  apogee.expose=apRaw-04280066, 47, A, Object
> >>>> 08:29:07  apogee.expose=apRaw-04280067, 47, A, Object
> >>>> 08:37:30  apogee.expose=apRaw-04280068, 47, B, Object
> >>>> 08:45:51  apogee.expose=apRaw-04280069, 47, B, Object
> >>>> 08:54:19  apogee.expose=apRaw-04280070, 47, A, Object
> >>>> 09:03:03  apogee.expose=apRaw-04280071, 5, A, DomeFlat
> >>>> 09:05:24  apogee.expose=apRaw-04280072, 10, A, Dark
> >>>> 09:07:12  apogee.expose=apRaw-04280073, 10, A, Dark
> >>>>
> >>>
> >>>
> >>> Viktor Malanushenko
> >>>
> >>>
> >>> _______________________________________________
> >>> Message 541 of sdss3-25mlog - Logs of nightly APO activities.
> >>> sdss3-25mlog@sdss3.org
> >>> https://sdss3.org/mailman/listinfo/sdss3-25mlog
> >>
> >>
> >>
> >> !DSPAM:10028,4f567ae624230551626727!
> >
> >> _______________________________________________
> >> Message 544 of sdss3-25mlog - Logs of nightly APO activities.
> >> sdss3-25mlog@sdss3.org
> >> https://sdss3.org/mailman/listinfo/sdss3-25mlog
> >>
> >> !DSPAM:10028,4f567ae624230551626727!
> >
> >
> > --
> >
> > Associate Professor, Assoc. Astronomer
> > UC Santa Cruz, UCO/Lick Observatory
> > Office: 831 459 5246
> > crockosi@ucolick.org
> > http://www.ucolick.org/~crockosi
>
>
> !DSPAM:10028,4f5690f329056431412353!
>
--
Associate Professor, Assoc. Astronomer
UC Santa Cruz, UCO/Lick Observatory
Office: 831 459 5246
crockosi@ucolick.org
http://www.ucolick.org/~crockosi