FOV Obstruction in OSMOS

Wednesday, November 6, 2019

Problem(s) Encountered:

While taking spectroscopic and photometric flats, there appeared a dark blob right of center in each image. Tried...

Focus Motion Failures

Saturday, October 19, 2019

Problem(s) Encountered:

Had an issue with the telescope focus tonight. I noticed it wasn't maintaining the focus I set at the beginning of...

RA Preload Bolt Failure

Thursday, October 10, 2019

Problem(s) Encountered:

I heard a slightly disconcerting noise when slewing to a target. I quickly looked around the dome mid-slew to make...

RA Jumps While Tracking

Friday, September 6, 2019

Problem(s) Encountered:

About a dozen times tonight, rather intermittently but perhaps more often in the north, the telescope would jump eastward...

Echelle CCD Readout Weirdness

Monday, September 2, 2019

Problem(s) Encountered:

I started to get going at 10:30 pm with flats and HgNe comparison exposures, but then had trouble with Echelle. At...

OSMOS Producing Low Image Counts

Tuesday, August 27, 2019

Problem(s) Encountered:

The problem of taking long-ish exposures that turn out looking like very short 10-20 second long exposures, like that...

Ensure brakes are OFF

Sunday, August 11, 2019

Problem(s) Encountered:

Forgot to turn the brakes off after bringing all the systems back up from lightning shutdown a couple days prior....

Power Issue to the Andor PC

Wednesday, July 31, 2019

Problem(s) Encountered:

The outlet powering the ANDOR PC showed problems (constant high-pitched whine from any PC connected to that or adjacent...

MIS Guide Probe Failure, y-stage origin limit

Monday, July 29, 2019

Problem(s) Encountered:

MIS guider probe CCW limit switch is not stopping the probe motor when it reaches (x,y) = (0,0).  The probe motor...

Dynamic OSMOS Dispersion, FYI

Tuesday, July 2, 2019

Problem(s) Encountered:

I've discovered that the dispersion of OSMOS seems to change, so that shifting a single calibration using the 5577...

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2.4m Trouble Reports & Solutions

Recent trouble reports for the Hiltner 2.4m telescope.  Note that you may find it worthwhile to peruse the 2.4m reports as well in case your problem is instrument-related.


Scroll down for a link to the complete archives.

To open a simple and searchable database containing all archived trouble report solutions, click on the following links.  While there are individual links for each telescope, it is worthwhile to search both databases in the event that you experience trouble:


Hiltner 2.4m Trouble Report Database (2019Dec05)

McGraw-Hill 1.3m Trouble Report Database (2019Dec05)


Click Here for the Full Archive