lots of jobs, zero success

Technical Support for the BRT telescope and website
supernovahunter
Posts: 1
Joined: Tue Jul 02, 2013 12:14 am

lots of jobs, zero success

Postby supernovahunter » Tue Jul 02, 2013 12:23 am

Just an obseration on the real time display. the last time i looked it said 189 jobs completed but none successful and also mentions something about focus issues. Is there still something wrong with the scope or system, surely some of the jobs would be successful out of so many? Kinda concerned. Please clarify. Thanks, Mike. :-)

David Conner
Posts: 133
Joined: Wed May 26, 2010 11:26 pm

Re: lots of jobs, zero success

Postby David Conner » Wed Jul 03, 2013 9:11 pm

Hi,

For info, my Cluster Camera images from last night are not centred on the requested coordinates. eg Job J200170 should be centred on V346 Aql, but is actually centred about 1/3 degree north and 1/5 degree east of the requested RADEC.

Regards,
David Conner.

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Jeremy5
Posts: 52
Joined: Sun Feb 24, 2013 8:13 am

Re: lots of jobs, zero success

Postby Jeremy5 » Sun Jul 07, 2013 10:45 am

How are we doing guys? Are you still on Teide?
No jobs for 3 weeks for me - I have a 40 job/£10 sub.

Go well!
Jeremy

David Conner
Posts: 133
Joined: Wed May 26, 2010 11:26 pm

Re: lots of jobs, zero success

Postby David Conner » Tue Jul 09, 2013 9:57 am

No news from the mountain for ten days now. How's it going?

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Ed
Site Admin
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Joined: Wed Sep 21, 2011 2:18 pm

Re: lots of jobs, zero success

Postby Ed » Tue Jul 09, 2013 10:42 am

We got back from the mountain last week, however you might have noticed that pointing is still not improved. We have:
  • Degreased and cleaned the gears
  • Cleaned out the homing sensor
  • Replaced the dec worm
  • Regreased the system
  • Correctly tensioned the belts
  • Tried adjusting the mount config at the suggestion of Software Bisque
  • Done several polar alignments and mapping runs
  • Tightened the optics
But none of these have had any noticeable effect. With no more ideas and with all other maintenance completed, there was little point staying on the mountain longer scratching our head. The mount seems well and truly unfixable at this point. We are embarking on a software fix instead while we consider our options.
More news to follow shortly.

David Conner
Posts: 133
Joined: Wed May 26, 2010 11:26 pm

Re: lots of jobs, zero success

Postby David Conner » Tue Jul 09, 2013 11:03 am

Thanks for the update ed, it sounds like a real headscratcher! :)

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Chris
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Location: BRT Headquarters
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Re: lots of jobs, zero success

Postby Chris » Wed Jul 10, 2013 12:32 am

I have just spent a couple of hours doing some magic fettling. Unfortunately it's the sort of fettling that might fix things or might do absolutely nothing. I have watched the last 12 or so jobs. A few galaxies right in the middle, one complete failure, 2 mount errors that were my fault, a cluster job (not useful), and a couple of RADEC jobs (which are not useful to me because it's not possible to tell by eye if they're right - they passed the auto-plate-solver though).

So... at the moment it looks like it might be working nicely, but that could all change. Assuming it doesn't ditch and start doing plate solve error jobs all night, then I would appreciate some comments about the night's performance tomorrow. (Especially if you get RADEC jobs back.. How far off the centre are they? And in RA or DEC?)

As I watch another two (not useful to me RADEC) jobs complete successfully (meaning they have passed the plate solver so can't be that far off). I have my fingers crossed, but unfortunately the fettling won't last more than a night. Should be interesting though!

wkl
Posts: 1
Joined: Sun Jun 09, 2013 11:00 am

Re: lots of jobs, zero success

Postby wkl » Wed Jul 10, 2013 8:24 am

All three jobs (Rec/Dec) at the last night were exactly in the center. Very fine.

David Conner
Posts: 133
Joined: Wed May 26, 2010 11:26 pm

Re: lots of jobs, zero success

Postby David Conner » Wed Jul 10, 2013 11:05 am

Hi,
Looking at last night's images and using C.d.C. charts to estimate the centres of the images;

Cluster Cam RADEC job J200356
Requested RA 14h 56m 28s Actual RA 14h 55m 34s
Requested Dec +46d 21m 44s Actual Dec +45d 54m 55s

Galaxy Cam RADEC job J199396
Requested RA 19h 48m 13s Actual RA 19h 48m 9s
Requested Dec +09d 18m 32s Actual Dec +09d 18m 27s

Both images showed slight trailing in the NS direction (about a pixel or so).

rjmodic
Posts: 88
Joined: Sun Dec 23, 2012 11:09 pm

Re: lots of jobs, zero success

Postby rjmodic » Wed Jul 10, 2013 4:30 pm

Job J199405 ( RADEC) from last night was perfectly centered. Also, tracking was very good for a 180 sec exposure. Only thing I did notice about this image was that the focus was off in the bottom half of the frame. The top half was well focused. Perhaps something in the optical train is tilted slightly.

Bob


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